Dwight Slate Machine Co. - Assigned Patents

Manufacturers Index - Dwight Slate Machine Co.

Dwight Slate Machine Co.
Hartford, CT, U.S.A.
Manufacturer Class: Metal Working Machinery

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
41,646	Feb. 16, 1864	Improved apparatus for grinding cutter-bits for rifling-machines	Dwight Slate	Hartford, CT
46,152	Jan. 31, 1865	Improvement in turning-lathes	Dwight Slate	Hartford, Hartford County, CT	"My invention relates to that kind of turning-lathe in which the arrangement for turning tapering and curved forms consists in giving to the cutting-tool a motion in and out to and from the axis of the lathe-spindle, in combination with the feed-carriage."
126,160	Apr. 30, 1872	Improvement in tool for grinding lathe-centers	Dwight Slate	Hartford, CT
146,287	Jan. 06, 1874	Improvement in Milling-Machines	Dwight Slate	Hartford, Hartford County, CT	Lemuel W. Terrell - patent attorney Milling-tools have heretofore been usually mounted upon an arbor or mandrel at the end of a lathe-mandrel, and the outer end of the arbor of the milling-tool has been supported by a center that is screwed up by the lathe center. In this case, the severe strain to which the milling - tools are subjected is liable to spring the parts, and prevent the milling-tool working true; besides this, the friction causes warmth and expansion in the mandrel that binds the parts in the heads of the lathe. My invention is made for insuring a reliable support to the shaft or mandrel of the milling tool, for allowing the parts to expand under change of temperature, and for easily removing one set of milling-tools and substituting another. I make use of a tubular extension to the mandrel that serves to support such mandrel, and also to clamp the milling-tools upon the arbor or mandrel. This tubular extension is sustained by a journal box or bearing, in which it revolves, and it is free to slide endwise under the varying conditions of temperature, or when being screwed up to clamp the milling tools, or unscrewed for their removal.
243,806	Jul. 05, 1881	Drill-chuck	Dwight Slate	Hartford, CT
258,236	May. 23, 1882	Pulp-molding machinery	Dwight Slate	Hartford, CT
		Pulp-molding machinery	George W. Laraway	Hartford, CT
326,889	Sep. 22, 1885	Gear-Cutter	Dwight Slate	Hartford, Hartford County, CT	Simonds & Burdett, patent attorneys I claim as my invention: In a gear-cutter, in combination, a disk shaped chuck arranged in a horizontal plane and having a central supporting-shaft, and a vertically adjustable supporting-rest arranged beneath the rim of the chuck, substantially as described. In combination with a rocking bed formed with guide ways and mounted on bearings on the frame and adjustable in a vertical plane on its bearings, and a reciprocating head-piece adapted to move within the guides on said rocking bed, a rotary cutter mounted on bearings in said head-piece and vertically adjustable therein, substantially as described, and for the purpose stated.
347,969	Aug. 24, 1886	Drilling-machine	Dwight Slate	Hartford, CT	A four-spindle example of this drill was seen on eBay.
390,604	Oct. 02, 1888	Lathe-tool	Moses C. Johnson	Hartford, Hartford County, CT	Simonds & Burdett - patent attorneys The object of my invention is to provide a holder of the class commonly used to hold cutting blades for turning, planing, and the like; and it consists in the combination of a holder or stock having a lateral blade-socket and a plural number of slots that extend beyond each other in the body of the holder, and the blade specially adapted to be held in the blade-socket.
404,773	Jun. 04, 1889	Machine for packaging postal-cards	James Rodda	Hartford, CT
		Machine for packaging postal-cards	Dwight Slate	Hartford, CT
		Machine for packaging postal-cards	William H. Bunce	Jersey City, NJ
521,206	Jun. 12, 1894	Centering Tool	Frank B. Covel	Hartford, Hartford County, CT
667,880	Feb. 12, 1901	Metal-working machine	Rufus Anderson	Hartford, CT	E. C. Whitney - patent attorney This invention relates, generically, to a metal-working machine of that class embodying a chuck or work-holder and a rotative tool-holder or spindle disposed in operative relation with said chuck, and more particulaiiy to improved work centering and holding means for a machine of this class. In metal-working machines of-the class above referred to, in which a chuck is employed for holding the work to be operated upon by a rotating tool, no automatically-operative means have been provided, in so far as we are aware, for first accurately centering a piece of work of irregular contour with relation to the axis of the tool and for subsequently engaging and holding the piece of work in its accurately-centered position that is to say, no independent means have been provided in connection with each jaw of an automatic or universal chucking mechanism whereby the extent of closing movement of each jaw with respect to a center common to all jaws could be arbitrarily varied. One object of the present invention is to provide, in a metal-working machine of the class specified, improved work centering and holding means embodying a plural number of sets or pairs of jaws adapted for engaging a piece of work of irregular contour at different points in the length thereof and to so construct and organize the elementary features of said means that one pair of jaws have predetermined relative movements with respect to a common center and will operate to engage and accurately center the piece of work with respect to the axis of the tool which is to operate thereon, and the other set of jaws will subsequently grasp the piece of work at a different point in the length thereof and hold the same in its accurately-centered position. Another object of the invention is to furnish an improved metal-working machine including a spindle supported for rotative and reciprocatory movements, an independent chuck disposed in advance of said spindle and embodying work-grasping jaws, and means in connection with and operative on reciprocative movements of said spindle for automatically operating said jaws.
		Metal-working machine	Howard N. Hinckley	Hartford, CT
772,568	Oct. 18, 1904	Drill-press	Howard N. Hinckley	Hartford, CT
941,506	Nov. 30, 1909	Change Speed Mechanism	Charles B. Elmore	Hartford, Hartford County, CT