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Manufacturers Index - Hendey Machine Co.
Patents
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Patent Number Date Title Name City Description
146,539 Jan. 20, 1874 Reversing Gearings for Metal-Planers Eli J. Manville Waterbury, New Haven County, CT This patent made the early Hendey Planers and Shapers a commercial success and was the one that David Ballard improved upon. (Patent #310,774) (This information courtesy of Hendeyman)

Abstract:
I do hereby declare that the following is a full, clear, and exact description friction-clutches; and it consists of an elastic reverse-lever working a friction-clutch on the main shaft of a planer or other machine depending on reversed motion, between two driving-pulleys, with corresponding friction-bearings running in opposite directions. The object of my invention is to secure safety against breaking parts of the machine by the failure of the friction-clutch to leave the driving pulley and to secure prompt action in the engagement of the clutch with the reverse-pulley, thereby avoiding the stoppage of the machinery when it is to be reversed.
310,774 Jan. 13, 1885 Reversing Gear for Shaping Machines David L. Ballard Torrington, CT John E. Earle - patent attorney

This patent was used on all of the Hendey Friction Shapers until the end of production in 1920. (This information courtesy of Hendeyman)

Abstract:
This invention relates to a device for reversing the action of the power upon the tool carrier in a shaping-machine, whereby the reciprocating movement may be imparted to said tool, and is an improvement upon the invention for which Letters Patent were granted to E. J. Manville, January 20, 1874, No. 146,539, and whereby that invention, applicable to metal planers, is adapted to shaping machines; and the invention consists in the construction as hereinafter described, and more particularly recited in the claim.
346,310 Jul. 27, 1886 Chuck James F. O'Neill Torrington, CT John E. Earle - patent attorney

Abstract:
This invention relates to an improvement in the construction of chucks, such as are applied to a revolving mandrel to hold metal articles to be turned or finished, and particularly to that class of articles which are externally or internally screw-threaded. If the article to be wrought or finished is screwed into a chuck, the work upon the article tends to make the screw-connection the more firm as the work progresses, and it is with difficulty that the article can be removed.

Various devices have been made to make the removal of the article from the screwthreaded chuck easythat is, to prevent the screw-thread binding in the chuck. It is to this class of chucks that my invention particularly relates, the object of the invention being to provide a chuck with jaws adapted to engage the screw-thread of the article, and hold it firm while being wrought, and then by releasing the grasp of the jaws the article may be readily removed; and it consists in the construction of the chuck, as hereinafter described,and particularly recited in the claims.
470,591 Mar. 08, 1892 Feed mechanism for screw-cutting lathes Wendell P. Norton Mount Vernon, NY Munn & Co.- patent attorneys
"W. P. Norton's patent" threading engine for lathe was made by Hendey Machine Co. and the American Tool Works Co., Cincinnati, OH.

Abstract:
The object of the invention is to provide a new and improved feed especially designed for use on screw-cutting en gine-lathes to conveniently and rapidly change the speed of the feed-screw according to the requirements of the screw to be out.
484,317 Oct. 11, 1892 Tool Holder for Lathes William C. Homan Meriden, CT Earle & Seymour - patent attorneys

This patent tool holder was manufactured by Hendey from 1892 until 1946. (This information courtesy of Hendeyman)

Abstract:
This invention relates to an improvement in the device for carrying the cutting-tool in engine-lathes, commonly called the toolpost, the invention having for its object to give a support for the tool ata point as near the cutting-edge as possible, and also -the ready adjustment of the tool, both as to angular and vertical position, and also to permit the removal of the tool from the lathe while at work and replace itwith certainty that the tool wlll stand in the same position when so replaced as it did when removed and the inventior. consists inthe construction as hereinafter described, and particularly recited in the claims.
517,612 Apr. 03, 1894 Suspension Metal Shaper Henry J. Hendey Torrington, CT A. M. Wooster - patent attorney

Abstract:
My invention has for its object to simplify and improve the construction of metal shapers, the special object being to provide a conand adapted to receive very large and long pieces of work, to receive in fact any shaped With these ends in view I have devised a novel form of machine which is all open under the cross head, the saddle being suspended from the cross head and the cutter bar ,suspended in the saddle. It should be understood however that my novel improvements are not restricted in their application to large sized machines, as I make smaller sized machines upon the same principle and find my novel improvements in the details'of construction to work admirably in such smaller sized machines.
517,613 Apr. 03, 1894 Combination Metal Shaper Henry J. Hendey Torrington, CT A. M. Wooster - patent attorney

Abstract:
My invention has for its object to so improve the construction of metal shapers as to adapt them to greater variety of work and to increase the speed with which various classes of work may be performed. My present improvements are adapted more especially to the general class of metal shapers known as traverse shapers, the special object in view being to combine in a single machine of this class, mechanism for producing, not only a rapid longitudinal movement of the cutting tool but also a rapid transverse movement of the cutting tool. Heretofore in this class of machines the longitudinal movement of the tool has been rapid but the transverse movement has necessarily been slow. In the present machine I am enabled to produce a rapid longitudinal movement of the cutting tool and an automatic feed, or by slight adjustment to so change the operation of the machine as to produce a rapid transverse movement of the cutting tool.

519,924 May. 15, 1894 Screw Cutting Engine Lathe Wendell Phillips Norton Torrington, CT Earle & Seymour - patent attorneys

This patent was an improvement to his Gearbox patent of March 8, 1892 (#470,591) and concerns the famous Single Tooth Dog Clutch Reversing Mechanism. The Quick Change Gear Box, the Dog Clutch Reversing Mechanism and the Automatic Stop Mechanism re-remained synonymous as the Hendey System until the end of production. (This information courtesy of Hendeyman)

Abstract:
My invention relates to an improvement in screw-cutting engine lathes, and more particularly to the device upon which United States Letters Patent No. 470,591 were granted to me under date of March 8, 1892, the object of my present invention being to produce a device of simple and comparatively cheap construction, having few parts, and not liable to derangement, durable, convenient in use, and adapted to a wide range of adjustment for varying the speed at which its feed screw shaft or lead-screw is driven.
519,941 May. 15, 1894 Reversing Mechanism for Metal Shaping and Planing Machines Amos F. Champlin Waterbury, CT Earle & Seymour - patent attorneys

This patent was used on all of the Hendey Friction Shapers until 1915 when the reversing handle design was changed. This device allowed micrometric adjustment of the trip point of the reversing mechanism, allowing cuts to be made to a line. It did for the Friction Shaper what the adjusting screw on the Automatic Stop Rod did for the lathes. (This information courtesy of Hendeyman)

Abstract:
My invention relates to improvements in reversing mechanism of metal shaping and planing machines, its object being to provide what I term a micrometer adjustment, which is applied to the reversing lever for the purpose of adjusting the length of stroke of any shaper or planer which has a reversing lever.
528,381 Oct. 30, 1894 Drilling Machine Wendell Phillips Norton Torrington, CT Abstract:
The object of the invention is to providea new and improved drilling machine which is simple and durable in construction, very effective in operation, adapted for use as a single or duplex drilling machine and more especially designed for drilling and reaming lathe spindles, billets, ingots, bars and other bodies requiring a comparatively long but straight and true hole throughout their length.

This patent was possibly used on the M36 Horizontal Boring Machine or the M68 4 inch Special Drilling Machine. (This information courtesy of Hendeyman)
549,006 Oct. 29, 1895 Screw Cutting Lathe Wendell Phillips Norton Torrington, CT This patent is for the Automatic Stop Rod Mechanism which allows for turning, boring and threading to a shoulder or in a blind holes. With the micrometric adjusting screw located on the apron, the feed can be stopped within very close limits. (This information courtesy of Hendeyman)

Abstract:
The object of the present invention is to provide certain new and useful improvements in screw-cutting machines whereby the movement of the carriage is automatically arrested.

The invention consists in the combination, with the reversing-rod under the control of the operator, of 'an auxiliary slidable rod provided with adjustable stop-collars adapted to be alternately engaged by the carriage, a lever connected with the said reversing-rod and auxiliary rod,and a clutch mechanism actuated by the said lever and adapted to be alternately connected byoppositely-driven reversing-gears with the driving-shaft.
622,160 Mar. 28, 1899 Friction Driving Device for Shaping or other Machines Wendell P. Norton Torrington, CT Abstract:
The object of the invention is to provide a new and improved friction driving device for shaping, planing, and other machines requiring a reciprocating movement of the head bed-plate, bed, or the like, the device being arranged in such a manner as to insure rotation of the driving-shaft in either direction without shock or jar when changing from one motion to another and without danger of injury to the working parts.

This patent is an improvement to the Manville/Ballard patents used on the Friction Shapers and Planers. The surface of the Friction is grooved and a different type of friction arm (spoke) is used. The original Friction drawing is dated February 22, 1895, which would indicate that the prototype (or sample as Hendey called it) would have been operating and under test sometime during 1895. Since the patent was filed on December 20, 1897, it is fair to assume that the basic design was refined during the 1895-1897 period. This Friction Drive design was used on all Friction Shapers until the last one was built on June 15,1920 (a 15 inch model). (This information courtesy of Hendeyman)
626,715 Jun. 13, 1899 Engine Lathe Head Wendell P. Norton Torrington, CT Abstract:
My invention relates to an improvement in engine lathe heads, and is designed more particularly for use in connection with the machines disclosed in Patents No. 470,591, dated March 3, 1892, and No. 549,006, dated October 29, 1895, granted to me for improvements in screw-cutting lathes. The object of the present invention is to provide improved means for mounting and securing the live-spindle in place in the headstock and for effectually lubricating the bearing therefor.

This patent is one of the best know of the Hendey patents, the famous Taper Headstock Bearings. From 1898 until the end of production in 1954, the Taper bearing was used on most Cone Head lathes and a large number of Geared Head lathes. It was easy to maintain and adjust, a very rigid, solid bearing. (This information courtesy of Hendeyman)
691,963 Jan. 28, 1902 Speed Changing and Reversing Mechanism Wendell P. Norton Torrington, Litchfield County, CT
1,132,551 Mar. 23, 1915 Mechanism for relieving the teeth of cutters Constant Bouillon Torrington, CT
1,287,342 Dec. 10, 1918 Tool Feed Mechanism for Shapers George H. Knight Torrington, CT Seymour & Earle - patent attorneys

Abstract:
My invention relates to an improved tool feed mechanism for Shapers, the object being to provide a superior mechanism of the character described, characterized by beginning the feed operation at the beginning of the rearward stroke of the ram, by providing graduations for the adjustment of the mechanism, and by furnishing a housing for the mechanism except as to its manually operable parts.

With these ends in view, my invention consists in a tool-feed mechanism for shapers, the said mechanism having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.
1,288,036 Dec. 17, 1918 Shaper George H. Knight Torrington, CT Abstract:
My invention relates to an improvement in metal-working machines, and more particularly to the class thereof commonly known as shapers, the object being to produce a compact, reliable and efficient machine constructed with especial reference to installing a cross-feed mechanism, a crossfeed controlling mechanism, and a cross-feed regulating mechanism upon the end of the cross-head so as to be readily accessible for operation, and so organized that the raising and lowering of the cross-head does not effect the amount of feed or the indication I of the feed.
1,337,387 Apr. 20, 1920 Tool Cabinet Constant Bouillon Torrington, CT Southgate & Southgate - patent attorneys

Abstract:
This invention relates to a tool cabinet adapted for attachment to a lathe or other similar machine.

It is particularly designed for holding the several parts of a so-called draw-in chuck in convenient position for the operator, and for protecting the parts from loss or damage.

It is the object of my invention to provide a tool cabinet of this type which may be cheaply and easily manufactured, and which may be readily attached to the machine with which it is to be used.

A further object is to provide for the easy adjustment of the cabinet both horizontally and vertically, in relation to the machine.

1,407,834 Feb. 28, 1922 Machine Tool Driving Mechanism Constant Bouillon Torrington, CT Southgate & Southgate - patent attorneys

Abstract:

It is one object of my invention to provide an improved self-contained belt drive for a machine tool, the belt preferably running on a single pulley on the machine spindle.

Another object is to provide a construction in which the driving mechanism is mounted in the base or pedestal of the machine in such-manner that the tension of the driving belt may be easily adjusted.

More specifically, my invention comprises change speed mechanism pivotally mounted in the base of the machine and movable as a unit about its pivot to vary the belt tension,

A furtherfeature of my invention consists in so constructing the change speed mechanism that it is removable as a unit from the machine without disturbing or dismantling other parts of the machine.
1,415,515 May. 09, 1922 Change Gear Mechanism Constant Bouillon Torrington, CT Southgate & Southgate - patent attorneys

Abstract:
This invention relates to change gear mechanism designed for use in lathes, drills and other machine tools, in which a wide range of working speeds is desired.

It is the object of my invention to provide a mechanism of this character by which a large number of speed changes may be maintained by means of a relatively small number of change gears, and by the use of simple and reliable controlling devices.

In the preferred form, I mount the gears upon three parallel shafts and control their positions by means of two hand shift levers.

By using three gears on each shaft, I obtain nine different speed ratios between the driving and the driven shafts.
1,525,265 Feb. 03, 1925 Headstock Construction Constant Bouillon Torrington, CT Abstract:
The object of this invention is to improve the construction of headstocks of machine tools, such as lathes and milling machines. To this end, the invention consists of a headstock carrying the usual bearings, a spindle fitted therein7` a face gear keyed or fitted to turn with the spindle but so as to permit axial adjustment between the spindle and gear, a bearing sleeve keyed or fitted to turn with the spindle but so as to permit axial adjustment between the spindle and sleeve, a driving pulley and connected pinion fitted to turn on said sleeve and means for adjusting said spindle axially. This construction is particularly adapted for use in back geared headstocks and particularly where the machine tool with such headstock is used as an instrument of precision.
1,527,247 Feb. 24, 1925 Electric Motor Driven Change Speed Device Constant Bouillon Torrington, CT Southgate & Southgate - patent attorneys
1,532,798 Apr. 07, 1925 Lathe Attachment Constant Bouillon Torrington, CT Southgate & Southgate - patent attorneys

Abstract:
The object of our invention is to provide a new and improved attachment for a lathe, particularly a metal turning engine lathe, constructed so that the driving plate for revolving the work can be driven at a different speed, preferably a slower speed, than the live spindle.
    Lathe Attachment Howard R. Blakeslee Torrington, CT  
1,563,546 Dec. 01, 1925 Electric Motor Driven Change Speed Device Constant Bouillon Torrington, CT Southgate & Southgate - patent attorneys

Abstract:
The object of this invention is to improve and further extend the electric motor driven change speed device shown, described and claimed in an application for patent filed by me October 15, 1921, Serial No. 50,784(patent #1,527,247).

In said prior application I disclosed an improvement in a change speed device which consisted in combining an electric switch controlling the motor with the operating connections or handle of said device, so that when said connections were operated to change the speed, the switch would be operated to cut out or slow down the motor and so that when the change was effected the switch would return to normal position and the motor to full speed.

In this present application, I have further improved or extended this idea by arranging the mechanism so that it can be used in combination with a motor connected to drive such change speed gearing, which motor is controlled by a magnetic starter and a starting and stopping push button station.
1,624,954 Apr. 19, 1927 Bull Gear inclosure for Crank Shaping Machines George H. Knight Torrington, CT Southgate, Fay & Hawley - patent attorneys

Abstract:
This invention relates to the general class of machines known as crank shapers and using a bull gear and crank for operation. It is also capable of application to crank planers operated in the same way or any other machine of similar character. In these machines the bull gear is driven by a pinion on its periphery and delivers power from the side of the gear by means of a crank pin, the offset of which is adjustable.

The principal object of the invention is to provide an inclosure to enable the bull gear to run in the same compartment with the other driving gears, so as to arrange for the same lubrication of the bull gear as the other gears of the driving train.
1,666,484 Apr. 17, 1928 Clamping Mechanism for Machine Tools Constant Bouillon Torrington, CT Southgate, Fay & Hawley - patent attorneys

Abstract:
This invention relates to means for clamping movable units to a machine tool bed, examples of such units being the tail stock or turret head of an engine lathe.

It is the general object of my invention to provide improved mechanism for clamping such units to the machine bed, so designed that the mechanism will be easy and rapid in operation and powerful and positive in its clamping action.

A further object is to provide a clamping mechanism which will apply an even pressure to the movable unit and which will hold the same in a desired position without displacement or distortion due to unevenly applied clamping pressure.
1,681,412 Aug. 21, 1928 Adjustable Machine Support Table George H. Knight Torrington, CT Southgate, Fay & Hawley - patent attorneys

Abstract:
The principal object of the invention is to provide a support cooperating with the table in such a way that the table can be raised or lowered easily and adjusted to substantially the desired position and then. the supporting means can be forced up a small distance for the fine adjustment and the weight of the table will be carried by a part of the support which is rigid; and to provide a positive support with no possibility of slipping when the work is heavy or when there is vibration.
1,762,063 Jun. 03, 1930 Mechanical Movement George H. Knight Torrington, CT Southgate, Fay & Hawley - patent attorneys

Abstract:
This invention relates to an adjustable mechanical motion for changing a constant reciprocating motion into an intermittent rotary motion which can be varied.

1,815,490 Jul. 21, 1931 Follow Rest Constant Bouillon Torrington, CT Ernest R. Llewellyn - patent attorney

Abstract:
This invention relates to a follow rest adapted for use on lathes and other machine tools of this character wherein the work is supported between centers as is best illustrated in a lathe. It is common practice, in performing a turning operation on work of a length and of insufficient diameter to properly support itself between the centers without deflection, to provide a single follow rest in juxtaposition to center the work axially relative to the cutting tool. The follow rest comprised a single frame secured to the usual carriage of the lathe and which is traversed in the well-known manner. With the construction heretofore followed the follow-rest was fixed in predetermined position axially and relative to the cutting tool which is a decided disadvantage when it is desired to support the work as close to the cutting tool as conditions would permit. The object of my present invention is to provide a follow-rest so constructed and arranged as to permit axial adjustment relative to the cutting-tool and which may, when desired, be positioned to precede the cutting or follow the cutting operation. Another object in my present invention is a novel means for supporting and adjusting the follow-rest relative to the cutting tool. A further object is to provide a supporting member whereby a plurality of follow-rests may be adjustably secured thereto. This permits of an arrangement whereby one follow rest may be positioned to precede the cutting tool, and when using one tool, the second rest is arranged to immediately follow the tool. With my axial adjustment these rates may be adjusted and positioned as close as is practical to the cutting tool, thus retaining the work in a rigid position during the cutting operation.

1,845,428 Feb. 16, 1932 Screw Thread Lock Ernest R. Llewellyn Arlington, MA Abstract:
This invention relates to screw threads and more particularly to means for preventing relative rotary motion between two threaded members, and while not limited thereto is particularly adapted to locking an externally threaded screw in an internally threaded member.

It is well known that the camming action of a screw thread will, under vibration, cause a screw to become loose and to back out of a tapped member. To overcome this action to some extent it has been necessary to hold a very limited tolerance between the screw thread and the tapped member and while this is a costly operation its effectiveness is not assured. Another general practice has been to secure a screw in a tapped hole by means of superimposing a so-termed jamb-screw after the first screw has been positioned. This is in accordance with the check nut theory. This practice is not advanta eous when it is desired to obtain a required a justment of the first screw as the tightening of the jamb-screw has a tendency, when it comes in contact with the first screw, to rotate and tighten the first screw. It is also possible for the above camming action to cause both of this practice it is often necessary to use a larger diameter amb-screw which requires an additional drilling and tapping operation.

To overcome the above disadvantages my locking device is contained permanently within the screw as is best illustrated by a fillister or headless screw wherein a screwdriver is inserted into a slot to rotate the screw. When the screw-driver is inserted into the screw slot, the locking device is actuated and disengaged from the internally threaded member. As the screw-driver is withdrawn from the screw slot my locking device automatically engages with the threaded portion of the internally threaded member thereby locking the two members in position thus preventing further relative rotary motion between the two members.

The object of my present invention is to provide a self-contained locking screw that may be positioned in a tapped member and when so positioned further relative rotary movement is arrested.
1,853,737 Apr. 12, 1932 Power Transmission Mechanism for Lathes or the Like Ernest R. Llewellyn Arlington, MA Roberts, Cushman & Woodbury - patent attorneys

Abstract:
This invention relates. to apparatus for performing various machining operations such for example as machines suitable for precision work and/or for work where substantially uniform operating speeds as well as relatively high speeds are desirable. A lathe is representative of machines of this general class. With apparatus of this character even a slight variation in the operating speed may produce quite a noticeable effect on a product, as for instance a variation in the smoothness or in the depth of a cut being made by a lathe. It is customary to equip machines of this class with gearing, usually of the selective change speed type, for obtaining the desired range of operating speeds. However, the maximum permissible operating speed for a geared unit is about 1200 R. P. M. Above this speed the gears are not only too noisy and unsafe, but also produce excessive chatter marks in the work due to tooth impact at high velocity. For these reasons a detachable unit of the type embodying toothed reduction gearing can not be modified merely by changing the ratios to provide a satisfactory speed increaser unit. It is highly desirable that a machine of this type be capable of operating at much higher speeds and that these speeds be attainable with a detachable speed increaser unit. Such an arrangement greatly increases the utility of a machine by making the higher speeds available through the detachable unit and the normal range of speeds available directly from the machine without the necessity of altering the construction of such a machine. At the present time cutting, tools for lathes, such as a tool with a carboloy tip for example, are available which will stand up at speeds at least as high as 3000 R. P. M. In as much as the lathe builders have been unable to produce a geared lathe which will operate satisfactorily at a speed above approximately 1200 R. P. M., the limit set by the selective gearing, it has been impossible to obtain anywhere near the maximum cutting value from such tools and of course the utility and productive capacity of machines of this type have remained limited accordingly. Some aspects of the present invention relate to means for increasing the operating speeds of machines of the class referred to beyond the range of speeds obtainable with geared units. In other aspects the invention relates to power transmitting mechanism for transmitting power at substantially uniform speeds without objectionable variations during changes of load or during accelerations or decelerations of the particular machine with which this mechanism may be employed. In this aspect the power transmitting means may be embodied in a machine for transmitting power directly from a power shaft or from a prime mover to the work to be treated. In some preferred embodiments, however, the power transmitting mechanism is in the form, of detachable unit adapted to be connected to machines of this class for increasing the utility thereof without the' necessity of altering the design or present construction. Objects of the present invention are to improve the efficiency of apparatus of the class described by providing means for increasing the operating speeds thereof beyond the range of speeds obtainable with geared units.; to provide apparatus of the class described with means for transmitting or delivering power evenly and smoothly at a substantially uniform rate, either at constant speeds or .during changes of speeds, as well as under constant or variable loads; to provide a detachable unit embodying power transmitting mechanism of this kind which is also compactly arranged and economical of space; and also to provide an improved unit of this character of rugged, durable and yet sensitive construction capable of responding to slight changes in operating conditions and consisting of a few parts which are relatively simple and inexpensive to manufacture.

1,881,750 Oct. 11, 1932 Antifriction Bearing Mounting Ernest R. Llewellyn Arlington, MA Abstract:
This invention relates to anti-friction bearing mountings, for spindles and the like, having oppositely disposed radial thrust elements as typically illustrated and advantageously adapted in a lathe tail-stock.
1,958,106 May. 08, 1934 Shaper and Power TransmittingMechanism Therefor George H. Higgins Torrington, CT Roberts, Cushman & Woodbury - patent attorneys

Abstract:
This invention relates to speed-change powertransmitting mechanism as well as to machine tools of the general class of which shapers, milling machines, planers and the like are representative.

It is customary to equip machines of this general character with an individual drive which may comprise a driving motor or other prime mover and reduction gearing. For some classes of work it is sometimes possible to provide a multiple speed driving motor having operating speeds and other characteristics corresponding to those required for certain operations of the machine. Whenever this can be done it is advantageous to transmit power directly from the motor to the machine as this not only avoids any loss of power through gearing, but also eliminates the possibility of chatter marks on the work due to tooth impact of the gearing, and in general tends to improve the operating efiiciency. In other cases it may be desirable to increase the utility of a machine by making available a number of lower operating speeds such as may be obtained by using a multiple speed motor with a speed reduction unit.

Difficulty has been encountered with mechanism available heretofore for actuating the operating members of machines of the class described. For instance the ram of a shaper is commonly actuated by apparatus including spur gearing. While theoretically the gear teeth may be formed to assure a rolling contact and a smooth uniform flow of power, it is found in actual practice that impacts sometimes occur as the teeth come into engagement. These impacts cause the transmission of power to be uneven and produce irregularities in the stock being machined. To overcome these undesirable results it has frequently been necessary to lap the gear teeth or to resort to other expensive operations which from a manufacturing point of view it is highly desirable to avoid.

Objects of the present invention are to improve the construction of apparatus of the class described so as to overcome the aforementioned difiiculties; to improve the eiliciency as well as to increase the utility of speed-change powertransmitting sets by providing for transmitting power either directly from a prime mover or through speed-change mechanism; to improve the operation and to reduce the cost of machine tools of the class referred to by providing improved operating mechanism therefor; to provide improved power delivering and transmitting mechanism preferably in the form of an individual drive unit of general utility which is particularly adapted for use with machines having the aforementioned improvements; and also to provide apparatus or the class described having an improved construction and arrangement of parts.
    Shaper and Power TransmittingMechanism Therefor Ernest R. Llewellyn Arlington, MA  
1,965,015 Jul. 03, 1934 Dual Control for Shapers William A. Walker Torrington, CT Ernest R. Llewellyn - patent attorney

Abstract:
This invention relates to an improvement in shapers and more particularly to a dual control for the operation of the various elements of the machine.

In the design and construction of shapers it has been customary to place the control levers and handles on the right hand side of the machine as it has always been assumed that the operator would desire to work from this side.

This contention is correct under ordinary conditions where the tool is traveling toward left of the machine and away from the operator or where the operator stands at the front of the machine, facing the cutting tool.

There are many operations wherein it is advantageous for the operator to watch the cutting of the tool from the left hand side of the machine. One operation in particular is that of undercutting with a substantial length of stroke of the cutting tool. Other operations are those of forming which requires the operator to follow a scribed line of contour.

In performing operations of this character it has been necessary for the operator to pass from the left of the machine to the right hand side, in starting or stopping the machine or to make necessary adjustments of the feed controls and the engaging or disengaging of these controls.

Accordingly, the object of my present invention is to provide a shaper with dual controls, conveniently arranged within the range of reach of the operator and on the opposed sides of the machine and whereby the operator will have complete control of starting, stopping or adjusting the elements regardless of which side of the machine it may be necessary or desirable to work from.
1,972,373 Sep. 04, 1934 Clutch Mechanism for Lathe Aprons Constant Bouillon Torrington, CT Ernest R. Llewellyn - patent attorney

Abstract:
This invention relates to machine tools and more particularly to a lathe apron actuating mechanism for traversing the apron and tool carriage. In the various types of lathes the bed has slidably mounted thereon a carriage upon which the tool support or slide is mounted. Depending from the carriage is the apron in which is mounted the gear train which may be optionally engaged with a rotating lead screw for automatically traversing the apron and carriage through the gear train and which is commonly referred to as the: power feed. The gear train may be also engaged with a stationary rack and manually actuated through a hand wheel. The transverse feed of the tool support or slide is also effected through the apron gear train. This transverse feed may be optionally engaged with the rotating lead screw to effect a power feed or, disengaged from the power-feed and be manually operated. Heretofore various devices have been utilized in the selective engaging and operating of these feeds which include various and well-known types of clutches of the friction or positive toothed character as shown and completely described in Patents Nos. 1,832,011, 1,692,705, or 1,218,784. In these various devices it is necessary to employ a multiplicity of parts which due to their, arrangement and operation require the interpositioning of thrust bearings in addition to the bearings required by the rotating members. It's also essential, particularly in the power traversing feeds of the carriage, that one of the feeds remain positively disengaged when an opposed power or hand feed is being used. This invention relates to machine; tools and more particularly to a lathe apron actuating mechanism for traversing the apron and tool carriage. In the various types of lathes the bed has slidably mounted thereon a carriage upon which the tool support or slide is mounted. Depending from the carriage is the apron in which is mounted the gear train which may be optionally engaged with a rotating lead screw for automatically traversing the apron and carriage through the gear train and which is commonly referred to as the power feed. The gear train may be also-engaged; with, a stationary rack and manually actuated through a hand wheel. The transverse feed of the tool support or slide is also effected through the apron gear train. This transverse feed may be optionally engaged with the rotating lead screw to effect a power feed or, disengaged from the power-feed and be manually operated. Therefore, the object of my present invention's to provide a lathe apron with a gear train in which the traversing feeds of the apron may be optionally and positively engaged and which, when one feed is engaged, the other means of engagement are positively inoperative. Another object in my invention is to provide a clutch operating mechanism that may be assembled and rotated as a unit when engaged or disengaged and, whereby I am permitted to eliminate the necessity of interposing anti-friction thrust bearings. A further object of my invention is to provide a combination apron mechanism whereby, when one means of feed is being utilized, connections to the other feeds are disengaged in a manner that permits connecting gears of the train to remain stationary thus producing less friction drag which results in greater freedom of movement of the carriage and apron.
1,979,333 Nov. 06, 1934 Power Transmitting Apparatus Ernest R. Llewellyn Arlington, MA Roberts, Cushman & Woodbury - patent attorneys

Original application 07 Oct, 1930. Divided and this application filed 22 Apr, 1932.

Abstract:
It is customary to equip machines of this general character with an individual drive which may comprise a driving, motor or other prime mover and reduction gearing. For some classes of work it is sometimes possible to provide a multiple speed driving motor having operating speeds and other characteristics corresponding to those required for certain operations of the machine. Whenever this can be done it is advantageous to transmit power directly from the motor to the machine, as this not only avoids any loss of power through gearing, but also eliminates the possibility of chatter marks on the work due to tooth impact of the gearing, and in general tends to improve the operating efficiency. In other cases it may be desirable to increase the utility of a machine by making available a number of lower operating speeds such as may be obtained by using a multiple speed motor with a speed reduction unit. Difficulty has been encountered with mechanism available heretofore for actuating the operating members of machines of the class described. For instance the ram of a shaper is commonly actuated by apparatus including spur gearing. While theoretically the gear teeth may be formed to assure a rolling contact and a smooth uniform flow of power, it is found in actual practice that impacts sometimes occur as the teeth come into engagement. These impacts cause the transmission of power to be uneven and produce irregularities in the stock being machined. To overcome these undesirable results it has frequently been necessary to lap the gear teeth or to resort to other expensive operations which from a manufacturing point of view it is highly desirable to avoid. Objects of the present invention are to improve the construction of apparatus of the class described so as to overcome the aforementioned difficulties; to improve the efficiency as well as to increase the utility of speed-change power transmitting sets by providing for transmitting power either directly from a prime mover or through speed-change mechanism; to improve the operation and to reduce the cost of machine tools of the class referred to by providing improved operating mechanism therefor; to provide improved power delivering and transmitting mechanism preferably in the form of an individual drive unit of general utility which is particularly adapted for use with machines having the aforementioned improvements; and also to provide apparatus of the class described having an improved construction and arrangement of parts.

1,979,443 Nov. 06, 1934 Headstock for Lathes Constant Bouillon Torrington, CT Ernest R. Llewellyn - patent attorney

Abstract:
This invention relates to headstocks for lathes and machines of like character and more particularly to back gearing and step cone pulley mountings for rotating the work spindle of the headstock embodied in machines of this type. In lathe, headstocks provided with step-cone pulley driving means, it has been the conventional practice to provide the pulley with plain bearings freely rotatable and supported on the work driving spindle. The pulley is usually provided with four steps of varying diameters capable of producing a desired range of speeds when engaged with the work spindle. To produce an additional range of speeds to the work spindle, the headstock is provided with back gearing which, when in engagement, is capable of doubling the number of speeds obtainable through the direct engagement of the step-cone pulley with the work spindle. When utilizing the speeds obtainable through the direct engagement of the step-cone pulley, the number of revolutions of the pulley and work spindle are the same, both members rotating as one unit. When the pulley is driving the work spindle indirectly, through the back gearing, the pulley, and work spindle are rotating at different speeds to one another according to the gear ratio employed. The above construction and required arrangement of parts, due to the limitations of space and, speed requirements, necessitated that the pulley with a driving, pinion attached thereto, be rotatably mounted directly on the work spindle with plain bearings. This construction is productive of excessive wear and friction, when the headstock is operated excessively with the back gearing in engagement. The usual headstock frame, having back gearing, is provided with back arms adapted to have rotatably mounted therein eccentric bearing bushings which have rotatably supported therein the opposed ends of the back gear quill. A connecting member extends freely through the quill and is secured in the opposed eccentric bushings so that they may be rotated in direct relation. Through a partial rotation of the eccentric bushings the back gearing is engaged and disengaged with the driving member. Accordingly, the object of my present invention is to so construct and arrange the step-cone pulley and members associated therewith, as required in a headstock of the above referred to type, so as to permit the inter-positioning of anti-friction bearings between the step-cone pulley and the work spindle. A further object is to provide an anti-friction bearing mounting, within eccentric housings, for the back-gearing quill. With the above members so constructed and arranged I have reduced to a minimum the amount of effective wear and friction between the rotating members which is inherent and well known with the plain type of bearing.
2,009,726 Jul. 30, 1935 Change Gear Attachment for Machines Constant Bouillon Torrington, CT Ernest R. Llewellyn - patent attorney

Abstract:
This invention relates to lathes and machines of like character and more particularly to feed mechanisms for moving the carriage and tool support in direct relation to the speed of the work spindle of the machine. In the conventional design of lathes it is the common practice to provide change-gear mechanism actuated directly from the spindle to give a direct ratio of longitudinal feed between the carriage that supports the cutting tool, and the head-stock spindle that revolves the work to be operated upon. This direct ratio is an important factor where the lathe is utilized in a thread cutting Operation and the threads cut a desired lead and within certain limits. To accomplish this result the lathe is provided with a head-stock having the usual spindle rotatably mounted therein. Various combinations of change gears are used in effecting a desired basic ratio of drive from the spindle to the quick change-gear box that directly or indirectly rotates the lead screw and which is effective in longitudinally moving the carriage and apron along the bed at the desired rate of speed, according to the combination of gears selected, to produce the desired longitudinal feed of the tool relative to the work. Speeds and feeds utilized in the operation of thread cutting are of a relatively low ratio with the cutting tool point of desired shape to properly form the side angles and root of the thread. In the arrangement of the above change-gear mechanism it is general practice to provide the head-stock spindle with a driving pinion which may be engaged or disengaged by an intermediate sliding gear which operates the interchangeable gears cooperating with the compound gear box. This compound gearbox comprises a cone of varying ratio quick change gearing which operates the main quick-change gearbox containing a cone of selective gears which operate the lead screw. With this arrangement of gearing various combinations may be quickly selected to effect a given ratio of speed between the spindle and lead screw which actuates the carriage. It is often desirable to use the above-mentioned thread cutting lathe in turning operations which presents attendant difficulties as it has been found more practical in turning operations to use an exceedingly greater spindle speed to revolve the work than is desirable or practical in thread cutting operations. While the thread cutting operation requires that a direct ratio be maintained between the spindle and longitudinal feed, turning operations, to produce a desired finish are usually accomplished with an exceedingly slow feed and high spindle speed and this ratio of feed is impractical to obtain through the regular arrangement of gearing from the desired high rate of spindle speed as this would require too great a reduction through the interchangeable gears which are required for thread cutting operations. Accordingly, the object of my present invention is to provide an auxiliary feed mechanism so organized and adapted that it may be inter-positioned with the regular gearing for conversion from the regular ratio of speeds and feeds of a thread cutting lathe to the most desirable ratio of speeds and feeds for turning operations. Another object of my invention is the organization of parts in a unit adaptable to be conveniently attached to the present design of engine lathe now in use and equipped for thread cutting operations and whereby the lathe may be converted into a high speed turning lathe.