US972497A - Saw-set. - Google Patents

Description

R. D. BENJAMIN. SAW SET.

APPLIOATION FILED DBO. as, 1908.

972,497, Patented Oct. 11, 1910.

5141mm l'oz Robe Ft D. Be n 'am in- UNTTED STATES PATENT OFFICE;

ROBERT D. BENJAMIN, 0F CUMBERLAND, MARYLAND.

SAW-SET.

To all whom it may concern:

Be it known that I, ROBERT D. BENJAMIN, a citizen of the United States, residing at Cumberland, in the county of Allegany and State of Maryland, have invented certain new and useful Improvements in Saw-Sets, of which the following is a specification, reference being had therein to the accoinpanying drawing.

This invention relates to saw sets, and has for one of its objects the provision of a tool of that kind adapted to engage the tooth of a saw in such a manner that defacement and marring of the saw will be positively prevented regardless of the amount of pressure applied to the handles.

Another object is to construct one of the holding members adjustable in order that the same may be accurately fitted to the various sizes of saw teeth.

A further object is to provide a device simple in structure and comparatively inexpensive to manufacture, embodying few working parts and these so arranged that the danger of the same becoming deranged.

will be reduced to a minimum.

With these and other objects in view the preferred embodiment of my invention resides in that arrangement and construction of parts hereinafter described, illustrated in the accompanying drawings, and embraced within the scope of the appended claim.

I11 said drawings :F igure I is a side elevation of the device. Fig. II is a similar view, partly in section, and Fig. III is a bottom plan View.

Similar numerals of reference are employed to designate corresponding parts throughout.

In carrying out the invention, I form at the end of a suitable handle or bar, a pair of fixed jaws. The space between the latter is considerably greater than the thickness of an ordinary hand saw blade, and on the forward jaw is arranged a suitable anvil having a flat surface parallel with the rear or inner jaw. A plunger is slidingly fitted on the bar and has one end extending into an opening formed in the base of the inner jaw, and is adapted when moved to enter the space between the jaws and bear on the lower end of the anvil. The actuating means for the plunger consists of a second handle or lever, one end of which is pivoted to the bar and bears against the opposite end of the plunger so that when the lever Specification of Letters Patent.

Application filed December 23, 1908.

Patented Oct. 11, 1910. Serial No. 468,954.

is depressed the plunger will move inwardly toward the anvi The bar (1) is preferably metal and is provided on its inner surface with a longitudinal depression or groove (2) extending through the entire length of the bar. An outer jaw (3), substantially right angular in vertical section, is secured in a stepped joint at one end, and on the outer face of the lat ter, in such position that it will lie at an obtuse angle to the bar (1). An inner jaw provided with a base portion (4), substantially the same width as the outer jaw, is detachably secured to the same end of the bar as the outer jaw but on the inner or grooved surface thereof. The body portion (5) of the inner jaw is considerably less in width than the similar portion of the outer jaw, and is disposed at an obtuse angle to the base (4) so as to be parallel with the outer aw when in position as shown in Figs. I to III, inclusive.

A guide block (6) provided with an opening is disposed in the longitudinal groove of the bar 1) adjacent the base of the inner jaw and the base (4:) of the latter is provided with a transverse opening in direct alinement with the opening of the guide 6). A plunger (7) has its opposite end portions slidingly fitted in the openings of the guide block and base, and is of a length somewhat greater than the distance between the inner terminal of the opening in the base (4) and rear face of the guide block (6). A coil spring (8) encircles the body of the plunger between the guide (6) and base (4), and has one terminal bearing on the latter while the opposite terminal bears on a transversely disposed pin (9) extending through the plunger. The pin abuts agalnst the face of the guide and limits the outward movement of the plunger caused by the spring.

As before stated the outer end of the plunger projects normally beyond the guide block (6) while the inner end lies substantially coincident with the inner face of the inner jaw, so that when the plunger is moved inwardly it will bridge the space between the jaws. An operating member for the plunger is in the present instance shown to consist of a handle or lever (10), one end of which is pivotally supported between a pair of depending lugs (11) disposed perpendicular to the grooved surface of the bar (1) On that end of the lever adjacent its pivotal support is formed a Y-shaped socket or detent, the opposite sides of which are unequal in length, and between which lies the outer end of the plunger (7 The lever is so positioned that the short arm on one side of the detent will when the plunger is in normal position bear on the guide block (6), while the opposite or longer side will bear against the outer end of the plunger. The inner face of the lever (11) is provided with a threaded opening into which fits a thumb screw (12), and operating on the threads of the latter is a wing nut (13).

'The latter is operated as a lock or jamb for the thumb screw, and since by depressing the lever the plunger will move inwardly across the space between the jaws, by turning the thumb screw the downward movement of the handle and commensurately, the inward movement of the plunger, will be varied.

Upon inspecting Figs. I and II, it will be seen that the outer jaw (3) is equipped with a transverse opening (14), and disposed on the inner face of said jaw is a substantially rectangular block or anvil (15) slidingly fitted in a vertically disposed seat. The anvil is provided with a threaded rod or stem 16) which extends through the opening (14). The diameter of the rod is less than that of the opening so that the anvil may be moved vertically within its seat, the parts being secured by a winged nut (18) mounted on the threaded stem beyond the outer face of the jaw and adapted to be brought to bear on the latter.

In the use of the device, the toothed edge of the saw to be set is inserted between the jaws. The anvil is then adjusted to the proper height on one tooth. The thumb screw (12) in the lever is adjusted to permit the lever and plunger to have the greatest possible amplitude. The lever is subsequently depressed until the plunger has given the required amount of flexing or set to the tooth. )Vhile the parts are in this position the thumb screw is adjusted in the opposite direction until its distal end abuts the face of the bar, after which it is held against movement by the lock nut (13). By now bringing the parts over the alternate teeth the same set will be given to all, since it will be obvious that any increase or pressure on the bar and lever beyond that which is required to flex the teeth will not, owing to the thumb screw, permit the plun ger to move farther inward. An opening (19) is formed in the base of the outer jaw whereby the teeth and plunger will be eX- posed to the view of the operator.

Having thus described my invention what I claim as new is:

A saw set comprising a body portion, said body at one end being reduced to form a stepped-seat or joint, an upper jaw detachably secured upon said stepped-seat, a lower jaw secured to the end of said body directly under said upper jaw, said lower jaw being formed with a wide body-portion and a narrow outstanding-portion in the center thereof, screws holding said lower jaw in place, and tooth-bending means cooperating with said jaws.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

ROBERT D. BENJAMIN. Vitnesses:

M. H. MILLER, GEO. A. HEIER.

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