US701897A - Saw-clamp. - Google Patents

Description

"0,701,897. Patented June It), I902.

w. l. KIRK.

SAW CLAMP.

(Application filed Nov. 16, 1901.)

(No Model.)

UNITED STATES- 1 PATENT OFF CE.

, ILLIAM IRWIN .K IRK, or DUBoIs, PENNSYLVANIA.-

SA AM i SPECIFICATION forming part of Letters Fae-a No. 701,89), dated June .10, 1902.

Application filed November 16, 1901. Serial No, 82,533. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM IRWIN KIRK, V a citizen of the United States, residing at Dubois, in the county of Olearfield and State of 5 Pennsylvania, have invented a new and useful Saw-Clamp, of which the following is a specification. x

This invention is an improvement in sawclamps, and relates particularly to the kind 1o which are secured' to a benchand in which the saw-blade is held while the teeth are being sharpened or otherwise operated upon.

The object of my invention is to provide a simple, inexpensive, and-easily-operated device in which the saw-blademaybequickly and securely clamped for the purpose above specified. I a

With this object in view my invention consists in providing a fiiied section towh-ich is hinged a clamping-jaw that is connected by means of arms tofa rotary shaft carried by or journaled within the fikedsection and by' which the clamping-jaw is operated.

My invention also consists in certain details of construction and novel combinations of parts, as will be fully described in the following specification and pointed out in the claims, reference being had to the accompanying drawings, in which Figure 1 is a perspective view showing the general application of my improvement. Fig. 2 is a plan view withthe jaw'open. Fig. 3 is a detail section about on the lirie 3 3 of Fig. 2, the clamping-jaw, however, being shown as clamping the saw-bladeinplace. Fig. 4 is a similar View with the jaw open, and Fig. 5 is a detail perspective view of one end of the shaft and an arm for connecting the shaft with a movable clamping-jaw.

my invention I employ aflat-stationarysection A, which is designed to be heldto a bench by means of screws a. The front lower edge of this jaw is provided with a shoulder a, that- In constructing a clamp in accordance with held a movable clamping-jaw D. These arms C have their inner'ends curved to form eyes in which the trunnions are adapted to fit, the outer ends of the arms terminatiugin archsections o, the extreme ends being bent down and perforated, as shown at 0 and by which ,the said movable jaw is held to the arms, the a'peziot' the arch being cushioned, as shown at E, against which the teeth of the saw contact and which prevents any injury thereto, as will be understood.

. The shaft B is preferably held in position by means: of a screw F, having a washer F arranged thereon, which overlaps upon and prevents dislocation of the shaft, andto the said shaft is securely held, preferably hy welding, a'handle G, by which it is 'revolved.

In operation the handle is elevated to a vertical position, which throws the movable jaw outwardly, when it may be elevated, as shown in dotted lines in Fig.4. The saw is then placed against the fixed section,thejaw D lowered, and the handle thrown back to a horizontal position, which revolves the shaft and by nions draws the jaw D against the saw, thereby securely holding itto the clamp. By reference to Figs. 3 and 4 it will be seen that the trunnions are so arranged upon the shaft that whenthe handle is lowered the trunnions will be carried-down past the horizontal center of the shaft, whichavoidsa'ny possible danger of the jaw becoming loose. In practice I prefer to arrangethe inner or clamping face of the movable jaw ona slight curve, so that when. the. jawis first drawn into contact with the .saw the central portion thereof will engage the saw first, after which the ends are drawn in until practically the entire face is engaged.

It willthus be seen that I provide a very simple, cheap, and economical. device by which a saw may be quickly and securely held while being sharpened.

Letters Patent, is-- I 1. A device of the kind described comprisinga stationary section having a longitudinal recess arranged therein, a shaft revolubly positioned in the said recess, trunnions eccentrically arranged on the ends of the shaft,

reason of the eccentrically-arranged trun- Having thus fully described "my inventioii, what I claim as n'ew, and desire to secure arms connected to the said trunnions at their inner ends, a jaw connected to the outer ends of the arms and means whereby said shaft may be operated, substantially as shown and described.

2. Adevice of the kind described, comprising a stationary section having a longitudinal slot aranged therein in its uppersurface, and a shoulder upon its lower surface, a shaft held in the slot and having trunnions arranged on the ends thereof, arms connected at their inner ends to the trunnions and having their outer ends terminating in arched portions, the extreme ends being bent downwardly, a jaw connected to the said downwardly-bent portions, cushions arranged in the apex of the arched portions of the arms, and a handle secured to the said shaft, substantially as shown and for the purpose specifled.

WILLIAM IRWIN KIRK. Witnesses:

PAUL B. STERLING, S. T. TROUTMAN.

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