US2524317A - Vise handle having plural cams to sequentially effect quick-positioning and work-clamping movements of slidable jaw - Google Patents

Description

Oct. 3, 1950 A. N. JOHANSSON 2 524 317 VISE HANDLE HAVING PLURAL cAus 'ro SEQUENTIALLY EFFECT QUICK-POSITIONING AND WORK-CLAMPING MOVEMENTS 0F SLIDABLE JAW Filed Oct. 28, 1945 Wima Patented Oct. 3 1950 OFFICE 2,524,317 VISE HANDLE HAVING PLURAL CAMS TO SEQUENTIALLY EFFECT QUICK-POSI- TIONIN G AND WORK-CLAMPING MOVE- MENTS OF SLIDABLE Alf Nikolai J ohansson, Bleket, Sweden Application October 2 In Sweden 7 Claims.

The present invention refers to an arrangement in vises and similar apparatus for the securing of work pieces and the like, in which Vises a movable clamping jaw is adapted to be pressed against a fixed jaw by means of a cam face on a swingable lever, which is carried by a slide piece adapted, by means of shanks or arms movable relatively to each other, to grip about a guide, said shanks being adapted to be compressed about the guide, in order thus to lock the slide piece by the swinging of the lever from an inoperative position about a bifurcated pivot formed by the end portions of said shanks. The invention has for its object to provide certain improvements in Vises of the type referred to, which will appear from the following descrip- 8, 1946, Serial No. 706,117 October 13, 1945 tion in connection with the accompanying drawing, in which:

Fig. 1 is a partly sectional elevation of a vise arranged in accordance with the invention. Fig. 2 shows a section on line II-lI in Fig. 1. Fig. 3 is an elevation of the slide piece with its pivot and with a lever arranged thereon. Fig. 4 is a top plan view of the mounted end of the lever. Figs. 5 and 6 show a modified embodiment of the lever and the slide piece viewed from above.

In Fig. 1, I designates a fixed jaw, which is connected to an attaching plate 2 to secure the device to a work bench or the like. Rigidly connected with the fixed jaw I is aguide bar 3 having a displaceable jaw 4 running thereon. The two jaws I and 4 cooperate with each other in the same way as the jaws of an ordinary vise.

Arranged in a guide recess 5 in a projecting portion of the jaw 4 is aslide piece 6 running on theguide 3. the configuration of which also appears from Figs. 2 and 3. The slide piece may be displaced to a certain extent within the guide recess 5, which is limited rearwardly by a screen I rigidly connected with the jaw 4. The slide piece has two shanks 6a. and 6b forming together a pivot 8 at the top, which is divided into two parts 8a and 81) by the slit 9. By the pivot parts to and 81) being pressed against each other, the resilient shank portions 6a. and 6b may also be pressed against each other so as to clamp the slide piece fast on theguide bar 3. Pivotally mounted on the pivot is a lever I0 provided with a cam surface II, which upon turning of the lever is caused to bear on a cooperating surface I2 on the jaw 4.

The twopivot portions 8a and 8b are shaped so as to form together an upwardly tapering cone, the bearing opening I3 of the lever I0 mounted on the pivot being conically shaped in a corresponding manner. The end portion of the pivot is threaded and carries a nut I 4, which .is secured in its screwed-in position by means of a pin inserted into a transversely extending slot I5. Arranged on the lower side of the nut on both sides of the thread opening are transversely extending projections I 6 adapted in the inoperative position of the lever Ill to enter corresponding recesses I! in the lever. The projections I8 form cam surfaces cooperating with corresponding oblique guide surfaces on the lever. When the lever is turned from its inoperative position shown in the drawing, the cam and guide surfaces I6, I! extending in the axial direction of the pivot will cause the lever to be displaced downwardly on thepivot portions 8a and 8b, which are then pressed against each other by the cooperating conical surfaces, so that theshank portions 6a, 6b of the slide piece are pressed fast against theguide bar 3. The cam and guide surfaces are so adapted that compression of the slide on the guide bar takes place upon an immaterial turning movement of the lever II]. At the continued turning movement of the lever, the slide piece is thus clamped fast, the jaw 4 being then displaced by means of the cam surface I I so as to bear rigidly against the work piece.

The taper of the pivot 8 is preferably chosen so as to be;equal to or greater than the angle of friction of the material. When the work piece is to be loosened, it is only necessary to turn back the lever which is caused to be displaced upwardly by itself on the conical pivot owing to the resiliency of the shank portions of the slide piece. If desired, the taper angle may instead be made smaller, but then the risk is incurred that the lever is caused to stick so as not to permit of being carried upwardly by itself when turned into its inoperative position.

The rigid cam or guide surface is preferably adjustable in the vertical direction to permit of subsequent adjustments with respect to any wear occurring in the conical surfaces of the pivot and the lever. When a nut I4 is being made use of,(such adjustments are undertaken by a turning movement of the nut, which on having been turned is secured in its new position by the locking pin inserted into the slot I5.

In the embodiment of the lever and the slide piece shown in Figs. 5 and 6, said slide piece presents, in the non-strained, that is to say noncompressed position of the pivot portions 8a and 8d, a greater width in the direction of resiliency of said parts than in the direction at right angles. thereto. Here, theslit 9a is preferably of such a width that the cross section of the pivot is substantially circular when the pivot portions are brought together. The opening I311 of the lever Illa is of an oval shape, as will appear from Fig. 5, and this shape substantially coincides with the shape of the pivot, when the pivot portions take the non-strained position shown in Fig. 6. In an arbitrary cross section through the opening of the lever, the smallest distance between the opposite sides is equal to or somewhat greater than the distance between the opposite sides in a corresponding cross section through the pivot, when the pivot portions are brought together. By turning the lever from its inoperative position in which the lateral surfaces of the opening of the lever consequently do not exert any pressure against the pivot portions, the latter may be moved toward each other, it being thus possible to press the shank portions of the slide piece against the guide bar. action is attained only after the downward displacement of the lever is completed or at least approximatel completed, an initial clamping effect of the slide piece having thus been obtained. On the continued turning of the lever, the pivot portions are brought together still further, the slide piece being then clamped so fast about the slide as to eliminate every risk of the displacement of the slide piece, when the jaw 4 is operated upon the cam surface ll. When this arrangement is used in combination with the conical pivot and the conical lever opening, the resistance to the downward displacement and thus to the turning of the lever can be made less than if the clamping of the shank portions of the slide piece were to be effected solely by downward displacement of the lever.

What I claim is:

1. A vise comprising a fixed jaw, a guide bar secured to said fixed jaw, a movable jaw, a member having a restricted possibility of movement relative to said movable jaw and being slidable on said guide bar, said slidable member having two resilient arms embracing said guide bar, said arms having at their ends pivot portions which together constitute a split pivot, and 'a lever mounted on said pivot and having cam means engageable with said movable jaw in a certain position of said lever to force said movable jaw towards said fixed jaw, said lever being mounted on said pivot for displacement around and alon the axis of said pivot, means on said lever and slidable member effective upon turning movement of the lever to produce displacement thereof along said pivot axis, and means on said lever and pivot effective upon such axial displacement of said lever in one direction to force said pivot portions towards each other so as to clamp said arms on said guide bar.

2. A vise as described in claim 1, said last named means comprising complementary conical surfaces on said lever and pivot portions.

3. A vise comprising a fixed jaw, a guide bar secured to said fixed jaw, a movable jaw, a member having a restricted possibility of movement relative to said movable jaw and being slidable on said guide bar, said slidable member having two resilient arms embracing said guide bar, said arms having at their ends pivot portions which together constitute a split pivot, and a lever mounted on said pivot-and having cam means. engageable with said movable jaw in a certain position of said lever to force said movable jaw towards said fixed jaw, said lever being pivotally mounted on said pivot and having a guide surface Preferably, however, this engageable with a complementary surface on said slidable member upon turning movement of the lever to displace the lever along the axis of said pivot, and means on said lever and pivot to force said pivot portions towards each other and to clamp said arms on said guide bar upon said displacement of said lever along the pivot axis.

4. A vise comprising a fixed jaw, a guide bar secured to said fixed jaw, a movable jaw, a member having a restricted possibility of movement relative to said movable jaw and being slidable on said guide bar, said slidable member having two resilient arms embracing said guide bar, said arms having at their ends pivot portions which together constitute a split pivot, a lever mounted on said pivot and having cam means engageable with said movable jaw in a certain position of said lever to force said movable jaw towards said fixedjaw, and a guide surface on said slidable member, said lever being pivotally mounted on said pivot andhaving a guide surface engageable with said guide surface on said slidable member upon turning movement of the lever to displace the lever along the axis of said pivot, and means on said lever and pivot to force said pivot portions towards each other and to clamp said arms on said guide bar upon said displacement of said lever along the pivot axis.

5. A vise comprising a fixed jaw, a guide bar secured to said fixed jaw, a movable jaw, a member having a restricted possibility of movement relative to said movable jaw and being slidable on said guide bar, said slidable member having two resilient arms embracing said guide bar, said arms having at their ends pivot portions which together consitute a split pivot, a lever mounted on said pivot and having cam means engageable with said movable jaw in a certain position of said lever to force said movable jaw towards said fixed jaw, and a guide surface on said slidable member, said lever being pivotally mounted on said pivot and having a guide surface engageable with said guide surface on said slidable member upon turning movement of the lever to displace the lever along the axis of said pivot,

means on said lever and pivot to force said pivot portions towards each other and to clamp said arms on said guide bar upon said displacement of said lever along the pivot axis, and said guide surfaces having asmall extension in the peripheral direction of said pivot, whereby to effect additional clamping action of said arms upon a further turning movement of said lever.

6. A vise comprising a fixed jaw, a guide bar secured to said fixed jaw, a movable jaw, a member having a restricted possibility of movement relative to said movable jaw and being slidable on said guide har, said slidable member having two resilient arms embracing said guide bar, said arms having at their ends pivot portions which togetherconstitute a split pivot, a lever mounted on said pivot and having cam means engageable with said movable jaw in a certain position of said lever'toforce said movable jaw towards said fixed jaw, and a guide surface on said slidable member, said lever being pivotall mounted on said pivot and having a guide surface engageable with said guide surface on said slidable member upon turning movement of the lever to displace the lever along the axis of said pivot, means on said lever and pivot to force said pivot portions towards each other and to clamp said arms on said guide bar upon said displacement of said leveralongthe pivot axis, and saidguide surface on said slidable member being adjustable in the axial direction of said pivot.

7. A vise comprising a fixed jaw, a, guide bar secured to said fixed jaw, a movable jaw, a member having a restricted possibility of movement relative to said movable jaw and being slidable on said guide bar, said slidable member having two resilient arms embracing said guide bar, said arms having at their ends pivot portions which together constitute a split pivot, and a lever having an apertured portion mounted on said pivot and having cam means engageable with said movable jaw in a certain position of said lever to force said movable jaw towards said fixed jaw, said lever being mounted on said pivot for displacement around and along the axis of said pivot, means on said lever and slidable member effective upon turning movement of the lever to produce displacement thereof along said pivot axis, means on said lever and pivot effective upon such axial displacement of said lever in one direction to force said pivot portions towards each other so as to clamp said arms on said guide bar, said pivot having in the released position of said pivot portions a greater width in the ALF NIKOLAJ JOHANSSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 16,841 Jarboe Mar. 17, 1857 972,604 DeVaul Q. Oct. 11, 1910 1,189,835 LaBadie et a1 July 4, 1916 1,279,011 Sanford Sept, 17, 1918 1,319,701 Griesbaum Oct. 28, 19 9 FOREIGN PATENTS Number Country Date 108,166 Sweden Aug. 10, 1943

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