US281463A - coeam - Google Patents

Description

(No Model.)

J. C. GORAMQ 2 Sheets- -Sheet 1.

VISH.-

Patented July 17, 1883.

I .all Ll I l lmm\ l///////////////////////l (No Model.) V 2 Sheets-Sheet 2.

J. G. CORAM..

- VISE. No. 281,463. Patented July 17, 1883.

A h u 'llllllll llllllllllllll 1 Hllllllllllllll By@ M\ UNITED STATE-s* PATEN T OFFICE.

` JOHN c. CORAM, OF LWELL, MASSACHUSETTS, ASSIGNOR OF' ONE-HALF ro GEORGE B. CORAM, OF SAME PLACE.

VISE.

SPECIFICATION forming part of Letters Patent No. 281,463, dat-,ed July 17, 1883.

Application filed June 11, 1883.

,vis'es in which the movable jaw, free to slide toward or away from the fiXed jaw so as to quickly adjust it to any size of material to be he-ld, is combined with means which, while permitting this freely sliding movement of preliminary adjustment, will act, after the adjustment is obtained, to further and powerfully draw the movable jaw toward the fixed jaws, so as to tighten the grip upon the thing to be held.

The invention consists ina certain novel combination and arrangement of devices for this purpose, which can best be explained and nnderstood by reference to the accompanying drawings, in which- Figure 1 is a side elevation of a vise embodying my improvements. Fig. 2 is alongitudinal vertical central section of the same. Fig. 3 is a transverse vertical section on line 3'3. Fig. 1.

The parallcl vise' shown in the drawings is of the treadle type. The faces of the jaws of the vise are adapted for wood-working but the vise can be readily adapted for metal-V working by suitably changing the form of the jaws, as will be understood without further explanationby those skilled in the art to which this invention relates.

The treadle-lever is shown at A. It is pivoted at a to any suitable base-piece, and is provided with a tooth or detent, b, to work in connection with a stationary ratchet, B, as usual in this class of vises, whereby it can be held in the position to which it may be depressed at its front end in closing the j aws together. The rear end of the treadle-lever is weighted or is combined with a downwardly- 'pulling spring, so that its front end will be thrown up when released from the control of the retaining-ratchet B.

The jaws of the vise are lettered C D. In the present instance the inner jaw, C, is a stationary jaw, and the outer j aw, D, is the freelysliding movable jaw. The outer jaw, D, has

(No model.)

ahorizontal shank, D', which fits and is adaptedto slide in a tubular guidesocket in a case, C'. Upon the under face of the shank or bar D' are formed ratchet-teeth c, and through an opening in the bottom of the case C', near its front end, works a pawl, d, which is pivoted to a pawl-level', E, hung on a horizontal pivot, e, between downwardly projccting cars c 011 'the front of case C'. The free end of the pawl must be guidedso that during its recipro catory movement its acting face shall alternately and at the proper time be held up into engagement with ratchet-bar D', and be removed from engagement therewth. A convenient arrangement for this purpose is found in the pins e', which project laterally from the pawl and enter and move in guide slots or grooves f, formed in the sides of the case CC These grooves or slots at the front and for a portion of their length slope downwardly, so that when the pawl is retracted the pins e', following these inclined portions of the slots, will draw down the acting end of the pawl out of engagement with the ratchet-bar D', as indicated by dotted lines in Fg. 2, thus leaving the bar D' and its j aw D free to slide in either direction. The slots for the remainder of their length are horizontal, so that when the pawl moves in the opposite direction it will, by the time the pins reach the top of the inclined part of the slots, be raised into engagement with the ratchet-bar 'D', and will, by reason of the pins traveling along the horizontal part of the slots, be maintained in engagement with said ratchet-bar, thus carrying the latter along with it during the rest of its movement. Under this arrangement Ihave a pivoted pawl which is positively actuated and guided in all its movements, thus insuring great certainty of operation; and these parts, as well as the ratchet, are on the under side of the bar D', thus removing danger of the teeth or other parts of this portion of the mechanism becoming clogged or fouled by dirt or other rcfuse.

The pawl-lever E is operated through the instrumentality of a toggle, F, pivotedat one end to lever E and at the other end to some stationary part of the device, as at g, and connected at its knuckle or elbow by a connecting-rod, G, to the rear end of the treadle-lever. By the employment of the pawl-lover E IOO and the combination the'ewith of the toggle F under the arrangement indicated, a Very powerful clamping action of the vise is obtained, the power applied to the foot-1ever or 5 treadle being transmitted under conditions which insu'e the best results. It will, moreove', be noted that the rear end or arm of the foot 01' treadle level' is upwardly bent or cu-ved, and is so formed and arranged that IO the end of this arm, when the treadle is depressed, is in a vertical plane very close to that of the plane of the axis a of the IGVGP, as

indieated by full lines in Fig. 2, thus materially increasing at this time the leverage of the I 5 treadle and gaining additional power near the conclusion of the clamping movement of the jaws, which is of material advantage.

Having now described my invention and the manner in which the same is or may be carried into efl'ect, I state in conclusion Ido not broadly claim a freely-sliding movable Vise-j aw in combination with a toggle and means through the intermediary of which said jaw is forced by said toggle up toward the stationary jaw; but

hat I claim as new and of my own invention is 1. The conbination, substantially as hereinbcfore set forth, with the stationa-y jaw, the freely-sliding` movable jaw, and its ratchet shank or bar, of the pivoted pawl-leve', the

pivoted pawl ca'ried by said level', and means,

substantially as described, whe'cby said pawl is positively actnated and guided independently of the ratchct-shank in its reciprocato'y movements to alternately and at the proper times engage and quit the said ratchet-shank.

2. The combination, with the sliding i'atchetsha'nk of the movable jaw, of the positively actuated and guided pawl for engaging the same, the pivoted pawl-ear'ying level', the toggle, the treadle-lever, and the 'od connecting the treadle-lever with the toggle, these elements being arranged and adapted to coope'ate substantially in the mane' and fo' the purposes hereinbefore set forth.

3. The combination of the stationary jaw, the movable jaw and its ratchet-shank, the guide-case supporting said shank, the paw1- leve' and the pawl carried by said lever, and

provided with laterally-projecting pins to enter and move in guide Slots 01' g'ooves in said case, said Slots or g'ooves being fol-med, substantially as described, to lift and lower the pawl into and out of engagement with the ratchet-shank at the times and in the manner substantially as he'einbefore set forth.

In testinony whereof I have he'eunto set my hand this 6th day of June, 1883.

JOHN C. CORAM. XVitnesses F. ILIILGORE, A. J. CIIAPMAN.

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