Manufacturers Index - Holdridge Manufacturing Co.
Holdridge Manufacturing Co.
Gardena, CA, U.S.A.
Manufacturer Class:
Metal Working Machinery
This page contains information on patents issued to this manufacturer.
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2,452,757
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Nov. 02, 1948
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Lathe radii attachment
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Warren Bornt Holdridge |
Los Angeles, CA |
This invention would become the genesis of Holdridge Manufacturing Co., which manufactured radii cutters until about 2020 when the business shut down. |
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3,070,238
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Dec. 25, 1962
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Automatic bar feeder for lathe
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Warren Bornt Holdridge |
Gardena, CA |
This bar feeder attaches to the lathe directly without requiring separate support. Another advantage claimed for it is that the stock can be advanced without stopping the lathe, which is achieved by co-ordinating the opening and closing of the collet with actuating the bar feeder. |
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3,345,893
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Oct. 10, 1967
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Radii Cutter
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Warren B. Holdridge |
Los Angeles, Los Angeles County, CA |
Claim:
The present invention relates to a tool and method for cutting radii on rotating workpieces, the same, thereby, being adapted to cut annular half-round grooves in the peripheries of round members, semispherical concavities, semispherical as well as ball ends on round stock, and other such shapes that are formed by radii cuts.
An object of the present invention is to provide a method for accurately measuring the position of the point of the cuter or bit of a radii cutter, thereby greatly facilitating setup.
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3,361,433
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Jan. 02, 1968
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Collet Closer
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Warren B. Holdridge |
Los Angeles, Los Angeles County, CA |
Claim:
A collet closer that comprises an air cylinder permanently mounted on the headstock of a lathe or comparable machine, the same having a through passage and provided with an adjusting nut for regulating the stroke of a piston operative in said cylinder. A bearing and mounting sleeve is held coaxially with the cylinder and piston by a radial bearing that provides for rotation of said sleeve relative to the air cylinder. A second radial bearing is provided between the piston and a retainer ring which has a sliding keyed connection with the mentioned bearing and mounting sleeve. A draw tube, commonly referred to as a drawbar, extends through the bearing and mounting sleeve and through the headstock of the lathe, the end thereof having a threaded connection with the spring collet of a chuck or other work-holding device extending from said headstock on the side thereof toward a tool or tools to operate on a workpiece held by the chuck. Said chuck, in any of the usual ways, is mounted on a rotationally driven lathe spindle housed in the headstock and through which the drawbar extends. The outer end of the drawbar is provided with a lock nut that has quick-release connection with the retainer ring and also a spring detent inter-engagement that affords rotational adjustment of said lock nut and of said drawbar so that by the threaded connection between the end of the latter and the collet a variable adjustment is effected in the opening of the collet, the adjustment making it possible to open or close clearance mounting on bar being worked. Said lock nut controls the travel of the piston to control and stop the travel of the collet in any specific required position. |
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3,447,245
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Jun. 03, 1969
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Method for Cutting Radii on Workpiece
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Warren B. Holdridge |
Gardena, Los Angeles County, CA |
This application is a division of my pending application filed 14 June, 1965, now Patent No. 3,345,893.
Claim:
The method of locating the cutting end of the hit on the yoke of a radii cutter in which a micrometer depth gauge is placed at a known distance from the axis of rotation of the yoke and, when adjusted to a position readable on the micrometer, serves as a locator for the cutting end of the bit. |
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4,690,415
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Sep. 01, 1987
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Hydraulic Nosepiece Assembly for a Collet Closer, and Method
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Warren B. Holdridge |
Gardena, Los Angeles County, CA |
Abstract:
A method and apparatus are shown for closing a spring collet upon a work piece in a lathe or similar machine tool, in which neither the work piece nor the collet is moved in the longitudinal or axial direction.
The collet closer has a nosepiece assembly within which an axially movable sleeve is provided. Movement of the sleeve causes the collet to open or close, in a radial direction, without axial dislocation of either collet or work piece.
The nosepiece assembly contains a hydraulic circuit which actuates the movable sleeve in response to movements of a draw bar. |
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