US2592076A - Vise with antitilting means for the movable jaw - Google Patents

Description

April 8, 1952 v. SPINNLER VISE WITH ANTITILTING MEANS yFOR THE MOVABLE JAW Filed Dec. 25, 1947 Patented Apr. 8, 1952 VISE WITH ANTITILTING MEANS FOR THE MOVABLE JAW Viktor Spinnler, Basel, Switzerland Application December 23, 1947, Serial No. 793,370 In Denmark February 8, 1947 2 Claims.

The present invention relates to a vise with one xed and one movable jaw, the latter being arranged on a slide rail, which is displaceable in a guide in the fixed jaw and can be rmly clamped by tipping, the movable jaw being displaceable on the slide rail by means of an eccentric lever in order to press it against a workpiece.

The vise according to the invention is distinguished from known vises of the kind in that the counter-bearings of the slide rail, which take the counter-pressure of the movable jaw and of the slide rail, are formed'by adjusting screws arranged in the guide of the fixed jaw, hardened and each tted with a counter-nut, and that the guide rail consists of unhardened iron.

The arrangement of hardened counter-bearings in connection with slide rails consisting of soft iron, makes possible instantaneous and certain tipping or clamping of the slide rail to the counter-bearings, which is not always the case in known vises. Since the set screws serving as counter-bearings are glass-hard, they. are practically not subject to any Wear. The set screws are conveniently accessible from outside and can be easily regulated, so that the clamping jaws may be adjusted exactly to each other at any time. If the slide rail should in the course of time become worn through severe stressing, it can easily be taken out and overhauled, i. e.rflat tened at the surfaces which cooperate with the set screws. By a simple readjustment of the set screws the jaws may be again easily regulated, whereupon the vise is practically again as good as new.

One form of embodiment of the object of the invention is illustrated by way of example in the drawing, in which:

Fig. 1 shows a side view of the vise mounted on a Work bench, with some parts in section,

Fig. 2 a top view of Fig. 1,

Fig. 3 a section taken on the line 3-3 in Fig. 1,

Fig. 4 a section taken on the line 4-4 in Fig. 1,

Figs. 5 and 6 show elevation and plan views, respectively, of Ian adjusting screw.

The illustrated vise has a fixed jaw I and a movable jaw 2. The fixed jaw I is fitted with a circular foot plate 3, from the underside of which projects a centrally located vertical pivot pin 4, the pin 4 and base 3 being relatively immovable. The pivot pin 4 is provided with a threaded extension 5 and with a square collar 6. The xed jaw I is supported with its foot plate 3 on a square plate 'I which is attached by means of screws 8 to the work bench 9 and has a central square hole III. The pivot pin 4 passes through this square hole, the square collar 6 fitting into the square hole I0, thus preventing the foot plate 3 of the jaw I from rotating with respect to the square plate l. A xing nut II, provided with a lever I2, is screwed on to the threaded extension 5 of the pivot pin 4. By tightening this xing nut, engagement of the square collar 6 with the square hole I0 is maintained. When the fixing nut is loosened and the vise is lifted, the square collar 6 can be raised out of the square hole I0. the vise turned through and again clamped in the new position in the manner described above.

Above the foot plate 3 the xed jaw I has a guide I3 of rectangular cross-section, in which a slide rail I4 is guided so that it can be displaced longitudinally. The slide rail I4 consists of two pieces 'of at iron, parallel to each other, arranged at a distance from each other and connected together by three cross pieces or webs I5. The cross pieces I5 are connected to one of the pieces of flat iron by welding and to the other piece of flat iron by a screw connection I6. The counter-pressure acting on the movable jaw 2 when clamping a workpiece, is taken on the one hand by two hardened set screws Il lying below the spaced at irons of the rail I4 and on the other hand by two set screws I9 horizontally offset with respect to the screws I1. This counter-pressure constitutes a moment about the bottom 'of the slide rail I4, which moment is counter-balanced by a moment comprised by the upward thrust on the set screws I9 by the axial distance between the pairs of set screws I1 and I9. The set screws I9 are positioned above the spaced flat irons and are also hardened. The set screws I'I and I9 can be individually locked in vertically adjusted position by lock-nuts I8 and 20, respectively. Play for regulating the horizontal setting of the slide rails is provided by making the vertical inside dimension of the guide I3 greater than the depth of the rail I4. A stop in the form of a rib 2I is arranged on the inner surface of the guide I3. This stop limits clockwise movement of the slide rail I4 and wobbling of the latter, yet permits the slide to be tilted upwardly a slight amount so that the movabe jaw and slide can be easily shifed by hand either toward or away from the fixed jaw.

At the front end of the slide rail I4 the movable jaw 2 is guided for limited sliding movement by means of a close-fitting guide 22. A leaf spring 24 is xed by means of a bolt 25 to a lug 23, which is attached to the underside of said guide. The leaf spring is positioned between the flat irons of the slide rail I 4 and bears against the front cross piece I5 in such a way that it biases the movable jaw away from the fixed jaw I and against an eccentric 26, which is pivotably supported between the front end of the irons. The axle 21 of the eccentric is supported in suitable holes drilled in the at-iron ends, and is secured by nuts 28 screwed on to the ends of the axle projecting beyond the flat irons. The eccentric 26 situated on the axle 2'I between the Iiat irons has a stop piece 29 for limiting the position of the eccentric when loose, and has a lever 30 for operating the eccentric.

For clamping any desired workpiece the clamping lever 30 is taken hold of by on'e hand and the slide rail is pulled out far `enough to allow the workpiece to be easily inserted between the jaws I, 2. Then the distance between the jaws is diminished by pushing the slide rail in until the jaws come to rest against the workpiece, after which, by swivelling the clamping lever 30 downwards, the workpiece is clamped fast, in doing which the slide rails I4 are clamped between the pairs of set screws II and I9, and are, through the friction thus produced by the clamping pressure against the screws I'I, I9, held fast, and so secured against axial displacement.

'As can be seen from Figs. 5 and 6, one end of each set screw is provided with an axial recess I'Ia which contacts the slide rail. The outer diameter of this recess is somewhat smaller than the core diameter of the screw, so that an annular shoulder I'Ib is `formed. This annular shoulder represents only a, comparatively small surface, so that when the clamping lever 30 is operated, a large specific pressure is exerted by the slide vrails I4 on the annular surfaces I'Ib to 'ensure immediate frictional connection between the 'setscrews and the slide rail.

What I claim is:

1. In a vise, a guide having an elongated aperture therethrough, a fixed jaw on said guide, a slide movably mounted in the elongated aperture in said guide, a movable jaw slidably mounted on s'aid slide in opposed relationship to the xed jaw, a lever pivoted on said slide, an eccentric formed on the lever and in operative engagement with the movable jaw, and anti-tilting means comprised by at least two set screws positioned in alignment transversely of the aper- 6 ture in the guide and extending upwardly through the bottom of the latter adjacent the end facing the movable jaw and contacting the bottom of the slide, at least two other set screws also positioned in alignment transversely of the aperture in the guide, said other set screws extending downwardly through the top of the guide and being horizontally displaced from the rst set screws in a direction away from the movable jaw, and contacting the top ofthe slide, whereby tilting movement of said slide and movable jaw away from the xed jaw is prevented during work clamping movement of said lever, and a transversely positioned guide rib formed on the bottom of the aperture and guide adjacent the end which is opposite the end facing the movable jaw so as to li'rnt a reverse tilting movement when said movable jaw and slide are being manually shifted either toward or away from the xed jaw.

2. In a vise as dened in and by claim 1, and said slide being comprised in part by a pair of spaced apart parallel rails movable through the aperture in the guide, said rst mentioned set screws constituting a pair of set screws in transverse alignment with respect to the axis of the aperture in the guide extending upwardly through the bottom of the latter and respectively contacting the bottom of the rails of the slide, and said second mentioned screws constituting a pair of transversely aligned set screws extending downwardly through the top of the guide, horizontally displaced from the rst pair of set screws and respectively contacting the top of the rails of theslide. 4 y

VIKTOR SPINNLER.

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

UNITED STATES PATENTS Number Name Date 669,605 Vernon Mar. 12, 1901 851,491 Broadbooks Apr. 23, A1'90'7 v1,324,269 Placek Dec. 9, 1919 1,806,527 Eisemann May 1,9, '1931 1,992,165 Bardon Feb. 26, 1935 FOREIGN PATENTS Number Country 'D'ate 18,071 Great Britain Sept. 22, 1894 102,033 Germany Apr. 7-, 1899 594,263 France 1 June 15, 1925 470,125 Great Britain Aug. l0, V1937

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