US758551A - Saw-clamp and file-guide. - Google Patents

Description

4 PA'TBNTED'APR. 26, 1904.- 11.;W'. MERWINE. SAW CLAMP AND FILE GUIDE.

APPLICATION FILED JULY 25. 1903.

N0 MODEL.

UNITED STATES Patented April 26, 1904.

HIRAM W. MERWINE, OF ASHLAND, PENNSYLVANIA,

SAW-CLAMP AND FILE-GUIDE.

SPECIFICATION forming part of Letters Patent No. 758,551, dated. April 26, 1904.

Application filed July 25, 1903.

To all whom it 711,003} concern.-

Be it known that I, HIRAM W. MERW'INE, a citizen of the United States, residing at Ashland, in the county of Schuylkill and State of Pennsylvania, have invented a new and useful Saw-Clamp and File-Guide, of which the following is a specification.

My invention is an improvement in sawclamps and file-guides; and the object of my invention, is to provide means for filing a saw properly without changing the position of the saw in the clamp; and a further object is to provide adjustable means for regulating the position of the file in the file-guide to provide for giving the proper pitch and bevel to the saw-teeth; and a stillfurther object is to provide a device of this kind which will enable an untrained hand to properly file a saw, the pitch and bevel having been adjusted for him. My invention consists of the novel features of construction and combination of parts hereinafter described," particularly 'pointed out in the claims. and shown in the accompanying drawings, in which 5 I Figure 1 is a perspective view showing the practical application of my device. Fig. 2 is a plan view of the file guide, showing the means for adjusting the file for the required bevel. Fig. 3 is a detail sectional view showing the meansfor clamping the saw-blade.

Fig. '4: is a view in elevation showing the means for supporting the saw-blade back, the saw and clamp being in section. Fig. 5 is an outline view showing. the cam-lever in unlocked position, and Fig. 6 is a similar view showing the cam-lever in looking position.

In the drawings, A represents a horseshoeshaped brass bracket having an outwardlyextending flange A along one edge. To the ends of the bracket are secured depending spring-steel strips A One of these strips is longer than the other, and adjacent the lower end of theshorter strip the longer one is bent inward and then bent downward parallel to and in contact with the shorter strip, and the end portion of the longer strip is bent over the end of the shorter strip, extending beyond and at a right angle to the shorter strip, as at A On the shorter strip and above and parallel -to the bent end A is a lug A. A set-screw A works through the portion A Serial No. 167,014. (No model.)

and clamps the bracket and strips to the edge of a table or work-bench. Two of these brackets are used, and theparts above described serve as supports for the saw-clamp and file-guide.

. Pivoted at the top of each bracket to the flange A is a curved bar B, the bar being pivoted intermediate its ends, and each end of the bars extends beyond a side of the bracket.

Parallel wire rods B connect the ends of the two bars, the rods and bars forming a rocking.

frame. A set-screw B at the pivotal point of each bar serves to prevent the frame from swinging, as by tightening said screw the frame can be held at any inclination to which .it may be adjusted. I

On each rod B is arranged a sliding plat O, the ends of the plate being turned downward. and perforated,-the rod passing loosely through said perforations. Midway its ends each plate has a lateral perforated projection.

C on one side. A straight bar O is formed with slots 0 adjacent each end and adapted -to be brought into alinement with the perfobar 0 suspended below the rods D and transverse to same, but also secure the bar C in. po-

sition on the plates C. It is furtherto be observed that the slots in the bars 0 permit,

when the thumb-screws are loosened, sliding movement of one plate 6 with reference to the other plate, and thus the bar C can be arranged diagonally across the rods B and the direction of its inclination changed, as shown in dotted lines in Fig. 2. It will be also noted that the bar (1* is always parallel with the bar C and an adjustment of the latter 'will also adjust the former. Handle-pieces C have sockets adapted to receive ends of a file, with suitable screws for clamping the ends in the sockets, and each socket has an upwardly-extending arm C, and each arm carries at its upper end a sleeve C these sleeves sliding on the bar C and being clamped to it by suitable setscrews. It is obvious that by sliding one or both sleeves the handles can be adjusted toward or away from each other, thus accommodating files of different length, and it will also be noted that the file C is held parallel with the bars C and C.

Adjacent the upper ends of the shorter plates A the ends of a metal plate D are secured to the bracket A, and secured to the inner face of the plate D is a strip of hard wood D. A metal plate D preferably spring-steel, has its intermediate portion arranged parallel with the plate D. This plate is longer than the plate D and adjacent the ends is bentinwardly, the end portions being bent outwardly, as at D and horizontally slotted, as at D*. This construction forms a bow portion at each end of the plate D, and this bow portion is arranged between the side members of the bracket The side members of each bracket opposite the member to which the plate D is attached are slotted, and in this slot fits the cam E of a cam-lever E. A pintle is arranged transverse to this slot and serves as the pivot on which the cam works and also supports the plate D passing through a slot D. The plate D also carries a piece of hard wood D on its inner face. Secured at intervals to the plates D D are the ends of U-shaped brackets F, which depend from the plates D, and in the bows of these brackets work thumb-screws F, the ends of which are adapted to engage the back of a saw G, held by the clamp.

The device herein described is used as follows: The saw being arranged between the wood pieces D, the cam-levers are drawn downward, forcing the plate D toward the plate D and gripping the saw firmly between the strips D. The screws F are adjusted to support the back of the blade. The frame, composed of the bars B and rods B, is adjusted by means of the thumb-screws B to give the required pitch to the saw-teeth, and the plates C are adjusted with reference to each other to give the bevel. This being done, the saw can be filed properly without having to take it from the clamp during the operation and without risk of one tooth being pitched or beveled differently from another.

Having thus fully described my invention, what 1 claim as new, and desire to secure by Letters Patent, isr 1. The combination with a saw-clamp, of an adjustable frame comprising parallel bars arranged above said clamp, a sliding plate on each bar of said frame, rods carrying sleeves depending from said plates, a bar sliding in said sleeve, handles adjustably connected to said bar said handles being adapted to hold a file, and means for securing the sliding plates in position with reference to each other.

2. The combination with a saw-clamp, of

brackets carrying said clamp, curved bars pivoted to said brackets, means for clamping the bars to the brackets, parallel bars connecting the ends of the curved bars, and means for holding a file at an angle to said saw-clamp, said means being slidably held to the parallel bars.

3. A device of the kind described comprising brackets, a saw-clamp arranged between said brackets, bars secured to the brackets, means for adjusting the inclination of said bars, straight parallel bars connecting the ends of the bars secured to the brackets, a plate adjustably carried by each of said bars, means for locking said plates in their adjusted position with reference to each other. sleeves dependent from said plates, abar sliding in said sleeves, and handles ad justably carried by said sliding bar, said handles being adapted to hold a file.

4. In adevice of the kind described, aframe comprising parallel bars, plates adjustably mounted on said bars, a slotted bar connecting said plates and permitting their independent adjustment, means for locking the slotted bar at an angle to the parallel bars, dependent sleeves arranged below the plates, a bar slidingly held in said sleeves, said sliding bar being parallel with the slotted bar, and means carried by the sliding bar for holding a file.

5. A device of the kind described comprising an adjustable frame having parallel bars, plates adapted to slide on said bars, a bar adjustably pivoted to and resting transversely across said plates, means for slidably holding a bar below and parallel to the pivoted bar mentioned, and means for securing a file below the sliding bar.

6. A device of the kind described comprising two horseshoe-shaped brackets, means for securing said brackets to the edge of a bench, a clamp arranged horizontally between and supported at the ends by the brackets, said clamp being adapted to hold a saw-blade, U- shaped hangers depending from said clamp, thumb-screws working in the bow portion of said hangers and adapted to support the back of a saw, and means carried by the upper part of the brackets for adjustably holding a file slidably above and transverse to the sawclamp.

7 A device of the kind described comprising brackets,means for holding a saw arranged between said brackets, a frame pivoted to the brackets and having parallel bars, plates sliding on said bars, rods depending from said plates, and having sleeves at their lower ends, a bar sliding in said sleeves, handles having sockets, each socket having an upwardly-extending arm, and means for adjustably securing said arms to the sliding bar.

HIRAM W. MERWVINE.

Witnesses:

WILLIAM A. MERWINE, REILLY MERWINE.

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