US900915A - Clamp. - Google Patents

Description

M. s. 0111mm.

, CLAMP; APPLICATION FILED 001.22, 1906. RENEWED APR. 6, 1908.

Patented Oct. 13,1908.

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' ous size and MATTHEW s. cU NEn'orNEW YORK, N. Y.

. (CLAMP.

Application filed October 22, 19 6, semi Nd. 339,893.

To all whom it may concern-.

Be it known that I, MATTHEW S. CUMNER, residing. in the city of Greater New York, in the county and State of New York, have invented certain new and useful Improvements in Clamps, of which the following is aspecificat-ion.

My invention in clamps relates to that class employed principally by machinists, machine tool makers, or the like and is par ticularly adapted to the securing of articles inthe process of manufacture, whereby they may be more readily positioned and main tained' for machine operations than by the clamping devices hitherto in vious to my invention in so present aware. The object of my invention is to provide a far as I am at simple and inexpensive clamp which may be readily adjusted to grip an article, which it is desired to secure, while at the same time it may have a considerable range in adjust ing-the clampmg means for articlesof variform with facility. The features characteristic of my inven ticn wherein T accomplish the object thereof, are depicted by the illustrations in the sheet of drawings hereto attached and forming part of this specification wherein,

Figure l is a side elevational View of one of my improved clamps gripping a cylinder shown in section and illustrating by the dotted position of the clamping jaw the extreme rangethereof; and Fig. 2 is an end elevational view of a pair of my improved clamps as applied to a cylindrical bar when the same is to be carried and secured ina horizontal position on tool for example a drill press, shaper, milling machine, grinder or the like.

In both views similar characters ofreference designate like parts throughout, wherein,

A the shankof the clamp has an integrally formed lug A constituting one of the jaws and the other jaw A is fitted to the upper surface a of the shank Aby tongue and groove connection comprising the'tongue a at the base of the jaw A and the-groove a in the upper surface a of'the shank A. The shank A is provided with a series of semicircular stops B for engagement with a stud B which is carried by the terminal or a link B which link embraces the jaw A and by virtue of a clamp screw C passing through theopposite end of the link and impinging against the relatively angular faceC of the Specification of Letters Patent.

'tical face vogue and pre-.

"clamp A is forced to be clamped by the angula-rly disposed link the link B that whenthe latter is forced to engage the in the operationthe bed of a machine Patented Oct. 13, 1908. Renewed April 6,' 1908. Serial No. 425,447.

I jaw A which, in the instance illustrated, is

the hypotenuse of a right angle triangle (formed by respectively the base and verof the jaw), forces the latter into a binding engagement with the jaw A or any intervening article which it is desired to clamp. These series of stops which are preferably. formed by drilling the stock and cutting away there-after approximately one half of the drill holes, together with a sufficient portion of the shank to insure clearance of the stud B from the semicircular stops B in disengaging the stud B from the stops B when adjusting the clamp, are arranged approximately at equal distances and extend along the length of the shank for a distance equal to a point substantially in 'line with the lug or jaw A and a point in line with the face of the jaw A when the latter is in a position toward the other end of the shank A as illustrated by the broken lines Fig. 1.

In the position illustrated in Fig. 1, the engage the article to B which, by virtue of its terminal stud B being restrained by one of the stops in the shank A while the screw C is forced against the. hypotenuse of the jaw A will force the latter in the direction of the integral jaw A and movement of'the jaw A will be permitted within range of the slot Z).

Intermediate of the link B and engaging the slot 7) of the jaw A is a stud b rigidly carried by the link B This stud takes a portion of the reaction thrust upon the jaw A as well as the clamp screw C.

he arrangement of the clamping jaw A and its clamping screw C is such hypotenuse of the jaw A of clamping an article between the jaw A and jaw A the jaw A will beforced in the .manner of a Wedge into engagement with the article to be clamped and by virtue of the angular position of the link B the jaw A would be substantially held in contact with the shank A irrespective of the strain which it may be subjected to within the limits of the strength of the clamp, and the jaw A will be maintained parallel with the jaw A.

It :will be observed by the dotted position Fig. 1, that the stud b? is approximately in a position with respect to the jaw A which would limit the movement of the jaw from further clamping, since the contact of the stop pin 6 with the terminal of the slot 6 is the limit of clamping movement allotted. to the jaw A Thus it will be seen that a limited movement of the clamping screw C on the hypotenuse of the jaw A is provided; and thus the tendency for restricting the jaw A to a parallel strain rather than an oscillating movement, is obviously more effective than were the clamping screw C in either of the extreme positions.

The plurality of stops B provide a considerable range in the adjustment of the clamp while the slot 7) in the jaw being parallelly disposed with the face of the shank or the foot of the aw A provides a limiting range of movement for any individual stop B.

It will be observed by the foregoing description that my novel parallel clamp provides a convenient and readily adjustable means for securing small articles while positioning them on the bed of a drill press or other tool as aforesaid, and serves the purpose in general of the usual means for strapping which is somewhat troublesome when pieces of work are required to be held sub stantially parallel with the bed of the press or other tool.

The clamp as illustrated shows the shank A as the base but it is obvious that the integral jaw A may serve as well for the base in which case a piece which is drilled or operated upon in the position illustrated may be subjected to a further operation at degrees from the first by turning the clamp together with the piece into a position 90 degrees from the former and in a manner whereby the integral aw A will be the base in lieu of the shank A.

I am aware that prior to my invention, clamps having parallel jaws adapted to rapid adjustment have been in vogue, and I therefore do not claim these broadly as my invention, and having fully described my invention, I do claim, however, and desire to secure by Letters Patent of the United States 1. In a clamp, the combination with a shank, and an integral clamping jaw, of an adjustable jaw, and a clamp co-acting between the shank and the adjustable jaw, and an adjustable pivotal connection beti een the said latter clamp and the adjustable jaw.

2-. In a clamp, the combination with a shank, and an integral clamping jaw, said shank having a longitudinally slotted portion, provided with series of stops, of an adjustable jaw, having a slotted portion, and a clamp co-acting between the slotted portion of the shank and the adjustable aw, and the slotted portion of the adjustable jaw being pivotally connected to the co-acting clamp.

In a clamp, the combination with a reetangnlar shank, and an integral clamping jaw, having its outer extremity substantially perpendicular to the shank, said shank having a longitudinally slotted portion, provided with a series of stops, of an adjustable jaw, adapt ed to slide upon the shank, having a slotted portion and a clamp co-arting between the stops in the slotted portion of the shank and the slotted portion of the a w, and a clamping screw arried by the latter said clamp adapted to engage the adjustable jaw.

st. In a clamp, the combination with a rectangular shank, and an integral rectangular jaw, perpendicularly situated with respect to the shank, said shank having a longitiulinally slotted portion provided with aseries of stops, of an adjustable jaw slidingly mounted on the shank, having a perpendieit lar securing face and an angular clamping face and a longitudinal perforation between the two said faces, and a clamp co-act ing between the stops, in the slotted portion of the shan and the slotted portion of the jaw and a clamping screw :arried by the hilt er said clamp adapted to engage the angular clamping face of the adjustable aw.

In a clamp, the combination with a. reetangular shank, and an integral rectangular jaw, having a free rectangular terminal perpendicularly situated with respect to the shank, said shank having a longitudinally serrated portion, of an adjustable jaw slidingly mounted on the shank, having a perpendicular securing face and a rectangular free terminal lying in the same plane with the rectangular terminal of the integral jaw and an angular clamping face, and a longitudinal perforation between the two said faces and of a clamp co-acting between the serrated stops in the slotted portion of the shank, and the slotted portion of the jaw and a clamping screw carried by the latter said clamp adapted to engage the angular clamping face of the adjustable aw.

In testimony whereof, I have hereunto signed my name to this specification in. the presence of two subscribing witnesses.

MATTHEIV S. CUMNER.

Witnesses PIIILTP II. STERN, J. IVALmon Can'rnn.

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