US 2546660 A
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Description (OCR text may contain errors)
March 27, 1951 G. R. WILCOX HACKSAW FRAME Filed June 26, 1947 INVENTOR ATTORN a 650%56 1 1/44 cox.
BY gm Patented Mar. 27, 1951 HACKSAW FRAME George E. Wilcox, Bernardston, Mass, assignor to Millers Falls Company, Greenfield, Mass., a corporation of Massachusetts Application June 26, 1947, Serial No. 757,276
2 Claims. 145-34) This invention relates to hack saw frames. The object of the invention is to provide a more efiicient and durable hack saw frame, and one in which the blade may be held securely in place during operation while at the same time it may be "readily inserted and removed. V
Other objects of the invention will in part be obvious and will in part appear hereinafter.
The invention accordingly comprises the features of construction, combinations of elements, and arrangement of parts, which will be exemplifled in the constructions hereinafter set forth, and the scope of the application of which will be indicated in the claims.
For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing, in which:
Fig. 1 is a side elevation of the hack saw frame carrying a blade ready for use;
Fig. 2 is a detail of the parts shown at the lower right hand of Fig. 1, but with the blade tensioning lever shown in the position which releases the tension on the blade;
Fig. 3 is a section on the line 3-3 of Fig. 2;
Fig. 4 is a broken sectional detail on the line 44 of Fig. 5 of the parts shown in Fig. 2 with the controlling lever in the locked position;
Fig. 5 is a sectional detail on the line 55 of Fig. 2; and
Fig. 6 is a detail of the lever pivoted to the frame which carries one end of the saw blade and the swinging of which results in varying the tension upon the blade.
The frame has two major members. The handle end A is of metallic construction folded over so as to present a U-shaped cross-section and this carries a hand grip B which is preferably of metal coated with baked synthetic enamel. The outer frame member C is of solid metallic construction adapted to slide within the open end of the member A as shown in Fig. 1. It is provided with notches or grooves I by which it is locked in different extensible positions by the engagement of one of the notches with a pin or rivet 2 carried at the outer end of frame A. The lever 3 lies as shown within the two depending arms 4, 4 of the frame A and is pivoted to the frame at its upper end by screw or rivet 5. The lower end of this lever carries a pin I5 for engagement with the hole I in the saw blade 8, the other end of which carries a similar hole 9 through which passes a pin I0 on the extensible frame member 0 when the saw blade is in position.
The lower end of lever 3 has an opening II shown roughly as of triangular shape at its lower end. The control lever I2 is pivoted at E3 to the: frame members 4 and is shaped so that it. can:
swing up against the lower side of the frame member I4 and, being of U-shaped cross-section, can. fit closely against the two sides of the member I4 and provide a smooth outline for the lower end of the frame as shown in Fig. 1. This lever is also provided with thickened parts i5 at its ends beneath the hand grip B so that it may be more easily grasped by the operator in swinging from closed position to open position and return. The frame arms 4 are provided with an arcuate or cam slot I6 along which is traversed a small spacer II carried with the control lever I2 either by being connected thereto by screws I8 as shown in the drawings, or' by rivets, if it is desired to provide a construction which is not to be readily disassembled. This spacer carries a roller I9 which, in its lowermost position, as shown in Fig. 2, has carried with it the lever 3 to a position such that the tension on the blade is released and the blade may be readily removed and replaced. This roller I9 when it travels with the lever I2, by which it is carried, along the path determined by the cam slot I6 to its upper position as shown in Fig. 4 again meets the inner face of the opening I I in the lever 3 and carries that lever with a minimum of friction to the position shown in Figs. 1 and 4. thereby putting tension on the saw blade 8 and holding it firmly in operating position.
It will thus be seen that I have provided a hack saw frame with simple and eflicient means for holding the blade in place under tension and releasing the blade for replacement whenever desired. The parts shown are of simple and cheap construction, easy to manufacture, not likely to get out of place, and the controlling lever is not subject to accidental derangement or release. The whole presents a hack saw frame highly efficient and desirable, both from the standpoint of manufacture, and from the standpoints of ease,
implicity, efficiency and certainty of holding to position of operation.
Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.
It is also to be understood that the following claims are intended to cover all of the generic and 3 specific features of the invention herein de-' scribed, and all statements of the scope of the invention which as a matter of language might be said to fall therebetween.
Having described my invention what I claim as new and desire to secure by Letters Patent is:
1. In a hack saw frame, a first section having means for carrying one end of a blade, a handle section with which said first section is adJ'U-Stably connected, said handle section having a depending gripping section and two depending arms, said arms being intermediate said blade carrying means and said gripping section, a lever pivoted at one end between said depending arms and care rying means for connection to the other end of the blade, an opening in the other end of said lever, opposed slots provided in the depending arms, a controlling lever pivoted to said depending arms, said controlling lever carrying a mem? ber, traveling in said slots and engaging a wall of said lever opening, whereby to swing the first mentioned lever on its pivot for tensiqning ,or releasing the saw blade.
2. In a hack saw frame, a first section having means for carrying one end of a blade, a handle section with which said first section is adjustably connected, said handle section having a depending gripping section and two depending arms,
t 4 said arms being intermediate said blade carrying means and said gripping section, a'lever pivoted at one end between said depending arms and carrying means for connection to the other end of the blade, an opening in the other end of said lever, opposed slots provided in the depending arms, a controlling lever pivoted to said depending arms, said controlling lever carrying a member, traveling in said slots and engaging a wall of said lever opening, whereby to swing the first mentioned lever on its pivot for tensioning or releasing the saw blade, said controlling lever being U-shaped in cross section, so that it may swing up along the lower sides of the lower part of the handle section of the frame, and thickened at its ends to provide gripping surfaces for the operator.
GEORGE R. WILCOX.
REFERENCES CITED he fol w n r e ence are of record h file oi th s p nt UNITED STATE PATENTS Number Name Date 864,166 Herrick Aug. 27, 1907 1,078,599 Garman Nov. 11, 1 13 2,116,137 Biester May 3, 1-938 2,194,494 Carroll Mar. '26, 1940