US50731A - Improvement in stocks for holding screw-cutting dies - Google Patents

Description

UNITED STATES PATENT OFFICE.

WM. PIMLOTT, OF SYRAOUSE, NEW YORK.

IMPROVEMENT IN STOCKS FOR HOLDING SCREW-CUTTING DIES.

Specification forming part of Letters Patent No. 50,731, dated October 31, 1865.

To all whom it may concern:

Be it known that I, WILLIAM PIMLo'r'r, of the city of Syracuse, .county ot Onondaga, and State of New York, have invented certain new and useful Im provexnents in Die-Stocks, whereby great advantages are gained in their use in the saving ot` time and labor in changing the dies of variable forms and sizes; and I do hereby declare the following to be a sufficiently accurate description of the same to enable any one skilled in such matters to construct and use the same, reference being made to the accompanying drawings and letters ot' reference thereon, which form a part of my specification, in which- Figure l represents a plan of the stock with the dies in working position; Fig. 2, a partial plan and section ofthe same, showing one-halt' of the die in working position and its relative connections with the stock. Fig. 3 shows the relative positions ot' the die with the stock as it is being removed.

Like letters refer to like parts in all the drawings.

It may here be remarked that many devices have been produced to enable practical mechanics to change the dies in their stocks without the loss of time or labor; butI have found in all with which I am familiar that even though the dies be relieved from the pressure of their binding-screws, the cuttings or chips ol' metal which they make often wedge in the stock so tightly that much time is lost in their removal.

This ditticulty I have found by frequent experiments is entirely overcome by my improvement, which consists simply in the introduction ot' an eccentric guide or bearing, A, at one end ot` the die B. which, upon being` placed in the position as shown at A, Figs. l and 2, will retain the die in working position, but when turned backward, as shown at A, Fig. 3, will release the die and permit another to be introduced in its place. The guide A is held in working position bythe set-screw O, Fig. 1, which enters the hole in the end of the eccentric guide A, shown at P, Figs. 2 and 3. The dies are pressed together bythe handle H, Fig. 1, beingI turned inward either by the hand or a wrench introduced at W, Fig. l. 'Ihe pin L, Fig. l, is simply introduced to prevent the set-screw O from being run back farther than is necessary.

Having thus brieiiy described nIy invention, what I claim, and desire to secure by Letters Patent, is

The eccentric guide or bearing A, substantially as described, and for the purposes set forth.

WILLIAM PIMLOTT.

Witnesses:

GEO. J. GARDNER., P. H. AGAN.

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