US304220A - miller - Google Patents

Description

(No Model.)

J. P. MILLER.

No. 304.220. GARPBNT-BR S lstented Aug. 2.6, 1884.

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WZ w @yf I www. I /nfy/j @NME STATES JOHN F. MILLER, OE PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO VALTER E. IIAGUE, OF SAME PLACE.

CARPENTERS VISE.

SPECIFICATION forming part of Letters Patent No. 304,220, dated August 26, 1884.

I l Application filed May 27, 1984. (No model.)

Z @ZZ whom it may concern:

Be it known that I, JOHN F. MILLER, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Carpenters Vises, and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and 1o use the same, reference being had to the'accompanying drawings, which form a part of this specification. l

My invention has relation to carpenters7 vises, and has for its object the provision of a novel means for securing the wooden screw in place upon the jaw of the vise.

My invention consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

2o Referring to the accompanying drawings,

Figure 1 is a section of a portion of a work-l bench with my improvements in position thereon 5 Fig. 2, a side view of the screw and its head, the latter being detached from the former.

A designates the top of the bench to which the vise is attached; B, the face or immovable jaw of the vise, and C the movable jaw of the same. n

3o D designates the screw, and D the head of said screw.

In the manufacture of wooden vise-screws it has been customary heretofore to turn the screw and its head from a single block, as indicated by the dotted lines in Fig. 2 of the drawings, where the dotted lines x show the outline of the block from which the screw was cut. It will be observed thatinthis operation of cutting out the screw and its head from a 4o single block considerable time is lost in reducing the body of the block to the size of the screw. I propose to form the screw separately from its head and to form a screw-hole in the head, into which a smaller screw, d, on

the end of the large screw D works, the head being glued or otherwise secured in position.

rIhis construction is of great advantage in the combination with the metal bearing-plate, for

the reason that a very large head may be econgmically employed, giving acorrespondingly 5o large bearing-surface on the plate without the necessity of cutting the screw out of a block of the same size as the block from which the head is formed.

E designates the plate, which is fastened to g the face of the movable jaw of the vise by screws e e, and is provided with a central opening for the passage of the screw, and an annular ange, c', surrounding the said central opening. 6o

F designates a pin which passes through the screw D just behind the flange e and serves to retain the screw D in position in the plate E. The movable jaw ofthe vise is countersunk at itsvface, so as to receive the flange of plate E and to give room for the pin F, which revolves with the screw. A nut, G, of the ordinary construction, receives the end of the screw D, which is provided with the usual lever, g, by which itl is turned into and out of `7o ,said nut.

The operation of my invention is as follows: The head being secured in position upon the screw by gluing or otherwise, the plate Eis slipped up over the shank of the screw until it is in contact with the head. The pin F is then inserted back of the ange c of plate E, which is thereby secured to the screw, while allowing the latter to revolve freely therein. The screw is now passed into the hole in the 8o movable jaw and screwed into the nut G. The plate E is then securely fastened on the face of the movable jaw, and the vise is ready for operation.

Having described myinvention, I claim- 8 5 1. The combination of wood screw D, having a head, D, plate E, made in one piece and provided with a central opening for the passage of said screw, and pin F, passing through said screw behind said plate, substantially as 9o and for the purpose described.

2. Ihe combination, with screw D, solid plate E, having a central opening for the passage of said screw, and an annular iange, c, and pin F, for securing said plate in .position on the screw, of vise-jaw G, bored for` the reoeption of said sorew and eountersunk for the reception of the ange e and pin F, substantally as described.

3. The Combination of screw D, having the solid plate E, secured thereon by a pin, F, and a removable head, D', constructed and arranged substantially as described.

In testimony that I claim the foregoing as. myown I have hereto affixed my signature in presence of two witnesses.

JOHN F. MILLER.

Vitllesses:

Jos. I. CoNNoLLY, ALVA A. lvIooRn.

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