US1432713A - Adjustable tap or reamer wrench - Google Patents

Description

W. W. MARSHALL.

ADAJUSIABLE TAP OR REAMER WRENCH.

APPLICATION FILED SEPT- 27, 1920.

Patented Oct. 17, 1922 Patented Get. 17, 1922.

STATES WARREN W. MARSHALL, OF NEW BRITAIN, CONNECTICUT.

ADJUSTABLE TAP OB REAMER IT/BENCH.

Application filed September 27, 1920. Serial No. 413,114.

T 0 aZZ whom it may concern Be it knownthat I, WYARREN W. MAR- SHALL, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Adjustable Tap or Reamer renches; and I do 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.

My invention relates to improvements in wrenches or handles for operating threadcutting taps, reame-rs, and analogous tools, and the principal object of the invention is to provide an extremely simple and inexpensive, yet a highly efficient and desirable wrench of this character which may be adjusted to difierent size tools by simply turn- 111 a single screw.

in carrying out the above end, I provide a plurality of jaws which are adjustable one upon another when one of said jaws is shifted, and a further object is to provide means for positively shifting said one jaw in either direction, whereby all of the jaws may be either expanded or contracted by movement of the same control device.

With the foregoing in view, the invention resides in the novel construction and arrangement of parts hereinafter described and claimed, the descriptive matter being supplemented by the accompanying drawings.

Figure l is a plan view of a wrench constructed in accordance with my invention showing the same adjusted for a comparatively small tool.

Figure 2 is an elevation with parts removed and in section, showing the device adjusted for a larger tool.

Figure 3 is a transverse sectional view as seen on line 33 of Fig. 2.

Figure 4: is a perspective view of the positively adjusted jaw.

Figure 5 is a perspective view of one of the jaws with which the jaw shown in Fig. 4 contacts.

In the drawings above briefly described, the numeral 1 designates the body of the improved tool, said body being here shown provided with oppositely extending handles 2, although one handle would in some instances suflice. The body 1 and its handles are substantially flat and said body is cut entirely through to provide a pair of recesses 3 and 4, and a connecting passage 5 between said recesses. The recess 3 is comparatively large and is provided with a plurality of straight sides, four being preferably employed. Within the recess 3 and cont-acting with the straight sides thereof, are adjustable jaw blocks 6, 7, 8, and 9, one block being in sliding contact with each of the straight sides of the recess. The several blocks are of ap proximately triangular form and said blocks are provided with cam surfaces 6 6 7 7", 8 8 9, and 9 the cam surfaces of each block being in the present showing, positioned at right angles to each other. The face 6 of block 6 contacts with the face 7 of the block '7; the faces 7 and 8 of the blocks 7 and 8 are in contact with each other, and the surface 8 of the block 8 contacts with the surface 9 of. the block 9. It thus follows that when the block 6 is shifted in either direction along its respective straight side of the recess 3, the several cam surfaces act on each other to slide the other blocks one upon another, and this sliding movement varies the size of the space between the sev eral blocks, which space forms the socket for receiving the shank of a tool to be operated. For adjusting the block 6, I have shown said block provided with a threaded shank 10 which extends through the passage 5 into the recess 4, and located within this recess, is an adjusting nut or screw 11 which is threaded on the shank 10, said nut or screw being held against longitudinal movement so that when it is turned in one direction or the other, the shank 10 and the block 6 will be adjusted as required. At its juncture with the block 6, the shank 10 is preferably flattened as shown at 12 and this flattened portion is received in the notch 13 in the block 9 when the jaws are contracted for application of the tool to a relatively small tap or the like.

For retaining the several jaw blocks in the recess 3, a pair of appropriate plates 14 are secured by screws or the like 15 to opposite sides of the body 1, said plates having openings 16 exposing the several jaw-blocks for use.

From the foregoing, taken in connection with the accompanying drawing, it will be seen that although I have provided an extremely simple and inexpensive device, it will be highly efficient and in every way desirable, and since probably the best results may Obtained from the several de:

triangular jaw blocks in contact with said straight sides, said jaw blocks having CO-QCl'JIlg cam surfaces for moving one by means of another, a shank integral mg a body having spaced recesses and a' with onecorner of one of said jaw blocks and extending therefrom through said passage and into the relatively small recess, the portion of said shank adjacent said. one jawblock being flattened and thereby reduced in' cross" section, and a nut in said relatively small recess threaded on said shank and engaging the recess walls to prevent endwise shifting, one corner of the jaw block adjacentthe shanked endof said one blockbeingprovided with a notch adapted to straddle the flattened portion of the shank when the jaw blocks are moved into unusually close relation with each other.

In, testimony whereof I have hereunto set my hand, 4 i a WARREN W. MARSHALL.

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