US855752A - Adjustable die-stock. - Google Patents

Description

PATENTED JUNE 4, 1907.

B. BURDEN; ADJUSTABLE DIE STOCK.

APPLICATION FILED OCT. 31, 1905.

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B. BURDEN, ADJUSTABLE DIE STOCK.

APPLICATION FILED OOT.31, 1905.

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UNITED STATES PATENT EroE.

BRADFORD BORDFN, OF lVARRE-N, OHIO, ASSIGNOR TO THE BORDEN COMPANY, OF WVARREN, OHIO, A CORPORATION OF OHIO.

ADJUSTABLE DIE-STOCK.

Specification of Letters Patent.

PatentedJune 4:, 1907.

Application filed October 31,1905. Serial No. 285,324.

To all whom it natty concern:

Be it known that I, BRADFORD BORDEN, of WVarren, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Adjustable Die- Stocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The primary object of my present invention is to enable pipes to be presented and threaded from the front or rear of a diestock. This I accomplish by making each of the dies reversible face for face.

A further object is to avoid any of the thrust in cutting being thrown upon the tongues of the adjuster which extend into the grooves of the die-blocks. This I accomplish by having the full width of each die block bear directly against the sides of the adjuster.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation, with the die blocks in position for cutting from the rear. Fig. 2 is a sectional view on line 22, Fig. 1. Fig. 3 is a similar view with the die blocks reversed, that is, for cutting from the front. Fig. 4 is a view in perspective of one of the dieblocks.

Referring to the drawings, 1 designates the housing having an open front and straight end walls 2 between which and between upper and lower walls 3 and 4 are located dieblocks 5 inclined toward each other along their side walls so .as to conform to the correspondingly inclined faces of the side members of the free sliding adjuster 6. The side members of the latter are connected by a portion 7 wherein is mounted a set screw 8, all as pointed out in Letters Patent No. 744,465, issued to me November 17, 1903.

The die-blocks are formed in both their inner and outer faces with corresponding grooves 9 to accommodate tongues 10 of the overlapping portions of the side members of the adjuster, such tongues effecting the movements of the dies as the adjuster is actuated. Heretofore, as in accordance with the means pointed out in my Letters Patent No. 817,217, dated April 10, 1906, to enable the threading to be performed on a pipe presented from the front instead of from the rear of the stock, the adjuster as well as the die-blocks themselves were bodily reversed.

The die blocks being then deprived of the bearing accorded by the overhanging portions of the adjuster it was necessary to em ploy additional means to retain them as against outward thrust. But by means of my present invention the adjuster always maintains the same position relatively to the die-blocks, that is to say, with its overlapping portions extended over the outer faces of the latter. Thumb nuts 13 working on threaded rods 14 serve to retain the adjuster so as to prevent any outward deflection thereof.

In threading a pipe presented from the rear, in the customary manner, such pipe is centered by the work guide 15 at the rear of the housing, but when it is desired to change the device so as to enable a thread to be cut on a pipe or bolt of insufficient length to be presented to the dies through the work guide, it is only necessary to move the adjuster outwardly sufficiently to free the die blocks, and to allow the latter to be reversed face for face, each being transferred to the place previously occupied by the other. Then the pipe may be presented to the dies from the front. So as not to impair the strength of the die-blocks the grooves therein are not formed as deep as heretofore, and in consequence the overhanging portion of each side member of the adjuster will stand outwardly a short distance from the face of the adjacent die-block instead of being flush therewith. In consequence of the grooves in the face of the die-blocks being of less depth than heretofore, and such die-blocks not being cut away to accommodate the overlapping portions of the adjuster, the full width of the sides of the die-blocks will bear firmly against the side members of the adjuster so as to thereby take up all side thrust, leaving the at one side thereof, of sectional dies Within the housing constructed and arranged to be reversed face for face to enable the threading to be done from the front or rear of the housing, and a free sliding adjuster for said dies fitted Within said housing and having means for engaging either face of each die to effect the adjustment thereof by thesliding of the adjuster.

2. The combination with a die-stock having an open-front housing, and a work-guide at one side thereof, of sectional dies within the housing, said dies being reversible face for face, and having corresponding grooves in their inner and outer faces, and an adjuster having portions overlapping the dies provided with tongues for fitting the outer grooves thereof.

3. The combination with a die stock having an open front housing having Walls, dies slidable between the walls, a work-guide at the rear side of the die stock, a free sliding adjuster fitted in the housing, there being engaging connections between the dies and the adjuster arranged to cause adjustment of the former, and the engaging-parts of the dies being symmetrically arranged, whereby the dies may be reversed, face for face, to enable the threading to be done from the front or rear of the housing. 4. The combination with a die-stock hav ing an open-front housing, and a Work-guide at one side thereof, of sectional dies within the housing capable of being reversed face for face to enable the threading to be done from the front or rear of the housing, each die having a groove in each of its faces, and an adjuster for said dies having side members fitted between the dies and the end walls of the housing and also having overlappingportions extended over the faces of the dies, said overlapping portions carrying tonguesfitting in said grooves for adjusting the dies, the latter at their sides bearing against the said side members of the adjuster, all side thrust being taken up by the said side members.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

BRADFORD BORDEN.

Witnesses:

WM. 1. 801mm, FRANK S. OHRYST.

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