US1886146A - Adjustable wrench - Google Patents

Description

Nov. 1, 1932. ANDREWS 1,886,146

ADJUSTABLE WRENCH Filed Oct. 14, 1930 r j J Cix-ZTGR WW z Patented Nov. 1, 1932 UNITED STATES assent PATENT orr cs FREDERICK HAROLD ANDREWS, OF TAIHAPE, NEW ZEALAND, ASSIGNOR TO BROOKS, OF KARORI, WELLINGTON, NEW ZEALAND ADJUSTA'BLE WRENCH Application filed October 14, 1930, Serial No. 488,612, and in New Zealand August 18, 1930.

This invention relates to adjustable wrenches and the like where a movable jaw is slidably adjustable upon the stock of a fixed jaw with means for holding it in different positions on the stock.

The object of the present invention is to prevent any slipping movement of the movable jaw during operation but which, at the stock and slidable between the edge of the stock and the tapered edge of the space and operable by a lever pivoted to the sliding 2o jaw. The taper of the wedge is preferably very slight in order to provide a jambing effect between the stock and the sliding jaw. The lever which is pivoted to the movable j aw is adapted to engage the wedge by being piv- 25 otally connected to it in order that as the lever is operated it may either force the wedge into position for tightening or releasing such wedge for the purpose of adjusting the movable jaw. 30 The invention will be described with the aid of the accompanying drawing, wherein Figure 1 is as side elevation of a wrench. Figure 2 is a fragmentary view showing the wrench in a movable position. 3 Figure 3 is a cross section through the wrench in the position shown in Figure 2.

Figure 4: is a cross section along line A-A Figure 1.

Figure 5 is a view of a movable jaw. 40 Figure 6 is a side view partly in section of an alternative form of wrench.

Figure 7 is a sectional plan on line 3-13, Figure 6.

Referring to the drawing, the wrench consists of a fixed jaw 1 with its stock 2 having a movable jaw 3 adapted to slide thereon and having a recess or space 4: to receive a sliding wedge 5 located between the under edge of the stock and the edge 6 of the space which is tapered to coincide with the taper of the wedge. A lever 7 is bifurcated so as to have I 1 forks 8. and 9 which are pivoted on pins 10 and 11 projecting from the side of theniovable jaw 3. A pin 12 passes through the" wedge 5 and through slots 13 and lt in the movable jaw 3 and into slots 15 and 16 in the '1 The holes 15 and forks 8 and 9 of the lever 7. 16 are suttficiently elongated so that during the arcuate movement of the forks the wedge 5 can freely perform parallel sliding motion against the underside of the stock. The slots 13 and 14 in the jaw 3 are suff ciently long for the wedge to have sufiicient parallel movement during operation.

While the lever 7. is in an upward or free position as'in Figures 2 and 3 the aw 3 is free to slide along the stock and may be adjusted to any desired position thereon. When the lever t is drawn. towards a closed po sition, as in Figure 1, the forks 8 and 9 will.

move the wedge into the space at causingit to wedge between the underside of the stock and the tapered edge 6 of the space 4, thereby wedging and locking the jaw 3 upon the stock. Owing to the wedge having a very slight taper the wedging is effective to prevent all rearward movement of the jaw 3 when the wrench is in operation. I

In order to release the wrench from its closed position, it may be necessary to tap the lever 7 with a hammer or the like in order to release the wedge from between the stock and the edge 6.

In Figures 6 and 7 a modification or variation of the invention is shown. In this case, the jaw 18 has its stock 19 slidable through a jaw 20 having a handle 21. A space 22 for the wedge 23 is provided in the sliding jaw behind the stock of the fixed jaw, the wedge 23 being operable by a lever 24 having forks 25 and 26 pivoted ona-pin 27 in the sliding jaw, the forks having slots 28 and 29 to receive a pin 30 from the wedge passing through slots 31 in the jaw 20.

It will be clearly seen that when the handle 21 and the lever 24 are brought together that the wedge 23 is tightened against the edge in position during operations.

The jaws of either of the wrenches shown may be shaped according to any of the known shapes of'such jaws and be made to fit any specially shaped nuts or provided with diverging jaws and serrated edges for use as a pi wrench or the like.

i ltltalaim is "-1: than stable wrench; a fixed jaw, a

stock carried y said jaw, an adjnsta'ble'jaw -{nelp borslidably receiving said stock a' slid wed loca tai i n the spacebetween the 7 a adjustab e jaw member and the'stock, a lever having an angular bifurcated ehdnthwbifun cations of said lever receiving the adjustable jamlflber and beingpiwotallymnneebed to I 1 the portions of the latterove lying the stock "midwhythe'length' bf the slid rig wedge,"said adjustable jaw member having the portions thereof lying at opposite sides of thewedge Iii Slotted, a pin carried by the wedge projectingthrough said slots and'permitting move ment of said wedge relatively to theadjustable member, the bifurcations of said lever having slots therein disclosed substantially perpendicularly to the first mentioned slots andreceivin said pin to accommodate axial movement of said wedge.

2.11 wrench as claimed in claim 1, characterized in that said pin is located substanw tially midway the length of the wedge to accommodate angular movement of the latter. In testimony whereof, I have signed my name to this specification.

" FREDERICK HAROLD ANDREWS.

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