US 922258 A
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Description (OCR text may contain errors)
P; H. GAVBN. SPANNER WRENCH. I APPLICATION FILED OUT. 8,1908;
PatentedMay 18, 1909.
UNITED TATES PATENT rrrcn.
Specification of Letters Patent.
Patented May 18, 1909.
Application filed Gctober 3, 1908. Serial No. 456,782.
1'0 all whom it may concern:
Be it known that I, FRANK H. GAVEN, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Spanner-\Vrenches, of which the following is a specification.
The object of my invention is to so construct a spanner wrench as to facilitate the application of the same to a gland, collar, flange, or other machine element which has to be engaged and turned thereby.
In the accompanying drawing Figure l is a perspective view of one form of spanner wrench constructed in accordance with my invention; Fig. 2 is a View of said wrench partly inside elevation and partly in section, and illustrating the manner in which the wrench is intended to be used, and Fig. 3 is a perspective View of another form of spanner wrench embodying certain features of my invention.
In many classes of machinery portions which have to be manipulated by a spanner wrench are frequently in such locations that it is difiicult to apply and adjust the wrench without careful manipulation, and this is especially true of motor cars, in which the machinery is usually crowded into such a relatively small space, that the proper adjustment of the wrench frequently necessitates the grasping of the same close to the head. As the use of the wrench is frequently required when the parts are at a very high temperature severe burns have resulted because of the contact of the hands with heated members of the machine.
Those parts of a machine which have to be manipulated by a spanner wrench are usually collars, flanges, glands, stuffing box followers, or the like, surrounding a rod or shaft of smaller diameter, and in carrying out my invention I have availed myself of this fact to provide the wrench with a guide member to engage such rod or shaft, and aid in the proper manipulation of the wrench by directing it to the member which it has to engage.
In Fig. 1 of the drawing, 1 represents an ordinary type of spanner wrench having, at one end, a semi-circular fork into which projects a pin 2 for engagement with an opening in the member of the machine which has to be turned. To one side of the wrench is secured a plate 3 having therein an openended slot 4, of lesser width than the diameter of the forked end of the wrench, the inner end of this slot being preferably semicircular and concentric with the curved fork. The outer end of the slot is also, by preference, flared slightly so as to facilitate the entrance into the slot of the rod or shaft which is surrounded by the gland, collar or other member of the machine to be engaged by the wrench. When the shaft or rod occupies the slot at it properly centers the wrench in respect to the member to be engaged, all that then remains to be done being to raise or lower the wrench until the plate 3 is in contact with said member, whereupon an inward movement of the wrench will bring the pin 2 into contact with the periphery of the member, in line with the openings therein, the wrench being then turned until its pin 2 registers with and can be forced into one of said openings. These operations can be readily performed when the wrench is grasped at the end of the handle, thus overcoming all risk of burning the hand, by thrusting it into a mass of heated machinery.
In order to adapt the wrench for use in connection with members of different thickness and having the openings for the recep tion of the pin of the wrench at difierent distances from their opposite faces, I prefer to so secure the plate 3 to the wrench that it can be adjusted from and toward the face of the same, and thereby vary the distance between the pin 2 and the inner or contact face of the plate, one method of accomplishing this result being to secure the outer end of the plate 3 to the handle of the wrench at or near the outer end of the same, and to provide said handle with a threaded opening for the reception of an adjusting screw 5 having a head bearing upon the outer side of the plate 3, as shown in Fig. 2. In some cases this may not be necessary, and in such cases the slotted plate may be rigidly secured to the yoke portion of the wrench, as shown for instance at 3 in Fig. 3, the latter View also illustrating the application of my invention to a somewhat different form of wrench from that illustrated in Figs. 1 and 2.
I claim 1. A spanner wrench having a yoke open at one side and provided on the other side with a guide plate having a slot less in width than the yoke.
2. A spanner wrench having a yoke open at one side and provided on the other side with a guide plate having a slot less in Width end and acted upon by a set screw which than the yoke, and having an inner end c0nengages a threaded opening in the Wrench. centric with the latter. 7 p In testimony whereof, I have signed my 8. A spanner Wrench having a slotted name to this specification, in the presence of 5 guide plate at its yoke end, said guide plate two subscribing Witnesses.
bein adjustable to vary the dlstance betwee ii the same and the face of the Wrench. FRANK OAVEN' 4. A spanner Wrench having a slotted Witnesses:
guide plate at its yoke end, said plate being HAMILTON D. TURNER,
10 secured to the handle of the Wrench at one KATE A. BEADLE.