US730166A - Die-stock. - Google Patents

Description

No. 730,166. PATENTED JUN-32,1903.

' N. SAWYBR.

DIE STOCK. APPLICATION FILED NOV. 1, 1902. N0 MODEL. y

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UNrren' STATES PATENT: v

' Patented June 2, 1903.

OFFI E;

DIE-STOCK.

SPECIFICATION forming part of Letters Patent No. 730,166, dated June 2, 1903.

v Application filed November 1, 1902. Serial No. 129,658. (No model.)

To all whom, it may concern:

Be it known that I, NnLsoN SAWYER, a citizen of the UnitedStates, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have inventeda certain new and useful Improvement in Die-Stocks, of which the following is a full, clear, and'exaet description, reference being had to the accompanying drawings. v

The object of my invention is to provide a die-stock having a head which is recessed to receive a member hinged thereto, with suitable means for adjusting the relative position of said hinged member and also with means for locking them together in any adjusted po-- sition.

It is a further object of my invention to pro-. vide a suitable latch for the dies.

- The invention is fully disclosed in the following description and claim, and illustrated in the drawings.

Referring to the drawings, Figure 1 is a top plan view of my device.- Fig. 2 is a side elevation. Fig. 3 is a bottom plan. Fig. 4 is a horizontal section taken on the line 4 4 of Fig. 2 and showing the dies in place. Fig. 5 is a cross-section on line 5 5 ofF-ig. l.' Fig. 6 is a section on line 6 6 of Fig. 1, and Fig. 7 is a detail view in section, showing the die and the latch therefor.

Referring to the parts by letters, A represents the head of the die-stock, having a member pivoted thereto at A and occupying a recess in one end of the head. An adjusting-screw a mounted in the head, is adapted to engage a shoulder a on the hinged member A of the stock. One handle, B, is screwed through the handle-socket a, which has a conical end 1), adapted to engage a conical recess a? in the end of the hinged member A of the stock.

another handle-socket a. WVhen the stock is being closed, the member A is swung upon its pivot until the shoulder a abuts against the adj listing-screw a and the handle B is then screwed into the handle-socket a until the conical end 1) engages in the conical recess a thereby firmly locking the member A of the stock to the head A and against the adjustable set-screw a Another handle, B, is secured to the opposite side of the head, preferably in The head A and the hinged member A of the stock are'provided with radial recessesO, in which the dies D are adapted-to slide. These dies are substantially of the form shown in Fig. 5, having cutting-teeth d on their inner ends and a cut-away portion d at the top and near the back end, whereby they may pass under the retaining-plates F and a cross-notch d in such cut-away portion for the purpose of being engaged by a latch which will retain the dies in place in the stock. Each one of the dies D is secured within its recess O against endwise movement by means of a latch E. This latch consists of a thumb piece e, a squared shank e, which projects through a circumferential slot F ina retaining-plate F, and has on the lower end thereof a boss e for engaging in the notch d of the die. .The plates F. are semicircular inform and are placed upon the stock, as shown, and are secured thereto'by means of screws f.

The latches E operate in the following manner: If dies are already in the stock, the boss 6 of each latch is in engagement with the re-' cess d of each die. WVhen' the dies are to be removed, the thumb is placed upon one of the thumb-pieces and the latch in connection therewith is moved until the boss 2 passes out of the notch 01 of each die, when the die will be free to slide from its recess. This operation is continued in connection with each die. If other dies areto be inserted, they are taken individually and passed into a recess, being pushed in as far as they will go. Then the latch is moved toward the die, thus carrying the boss 6 into engagement with the recess i On the under side of the stock is arranged a suitable guiding mechanism for the pipe to be threaded, which consists of the jaws G, adapted to slide in suitable openings in the stockand having .ins which en a e cam- 3 3 b b slots h in an operative ring H. This ring is retained in proper position 'bymeans of another ring K, which is secured to the stock by means of screws k.

A thumb-piece M may be provided upon the hinged member A of the stock for swinging the same upon its pivot.

Having described my invention, I claim- In a die-stock consisting of a head having a r .l o

suitable recess therein adapted to receive a said'hinged member, substantially as and for IO hinged member and having also an internallythe purpose specified. threaded tubular handle-socket, a member In testimony whereof I hereunto afiix 111 y hinged to said head and having a conical resignature in the presence of two Witnesses. cess in its free end, a handle screwed into 1 a *I r T i said socket, and having a conical lnner end NE bAxVl LR for engaging the recess in the end of said Vitnesses: hinged member and an adjusting-screw E. 13. GILCHRIST, mounted in said head for engagement with E. L. THURSTON.

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