US 2641947 A
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June 16, 1953 c. s. L. WERNE 2,641,947
SCREW-OPERATED VISE HAVING WEDGE CLUTCH Filed Jan. 15, 1950 I N VEN TOR.
CARL 5gp LENA/ART WERNE M /M ATTORNEYS Patented June 16, 1953 CLUTCH Carl Stig Lennart Werne, Gothenburg, Sweden Application January 13, 1950, Serial No. 138,738
In Sweden JanuaryZ'Z, 1949 2 Claims. 1
The present invention relates to screw vises I of the type which are providedwith a fixed jaw, and a movable jaw slidable in guides to and from the fixed jaw. -fI'he object of the invention is to provide a vise of the kind referred to which is simple in con struction, easy to handle and efiicient in its action. i
The invention is broadly characterized in that between a slide slidable in guides and movable with the movable jaw, and a surface parallel to the guides of the movable jaw, there is: inserted a wedge-shaped clutch member the narrower end of which is directed towards the fixed jaw, and that means are provided for forcing the movable jaw and said slide towards or from each other. v V
In this vise the slidable jaw can be freely slid to contact a piece of work placed between the jaws, and by forcing the slidable jaw and the slide in a direction away from each other the clutch member prevents the slide from moving backwards, so'that the piece of work will be clamped.
An embodiment of the invention is by way of example shown in the accompanying drawing,
Figure 1 is a sectional view of a vise constructed in accordance with the invention;
Figure 2 is a plan view thereof; and
Figure 3 is an end view showing the vise from the rear.
In the drawing l'denotes a base plate provided with holes 2 for screw bolts (not shown) for fastening the plate to a bench, upon which the vise is to be mounted. To the upper face of the base plate there are secured, such as by welding, two parallel guide bars 3 and 4 of U- shaped cross-section which are spaced apart. To one end of said guide bars there is secured a cross piece I forming the fixed jaw of the vise. The other jaw 8 of the vise is secured to: one end of a left-hand threaded screw sleeve 9, which by means of an intermediate piece It] is secured to a slide ll slidable in and along the channels of the guide bars 3 and 4. On the side of the slide ll remote from the cross piece I another slide is slidable in and along the guide bars 3, 4, said other slide comprising a right-hand threaded screw sleeve l2 coaxial with the sleeve 9, an intermediate piece l3 projecting down between the upper flanges 6 of the respective guide bars 3, 4 anda slide block [4, which is embraced by said flanges and the bottom side of which is provided with an inclined surface l5. Between .said surf ce-and the cha nel .suriace 16 forme b t l wer flan es '5 of th u de ars 3., V I.
there is inserted a wedge-shaped clutch member 11 having its narrower end direct d a s the slide it and pr vid da t ur ace contest n sa d channel surfa s W with a seri s of tran QliSB g oves. l8- T e c ut h memb r I1 s aco ed y late spr n 0 ecur 'the l d block- 4 b m ans o screws 19. and ad t o .keep the c utc member J pressed W1 a suitable f rce tween the su face 15 o the li block i4 and the channel surfaces I6. In the space 2! between the screw sleeves 9 and I2 there is disposed the middle portion of a screw spindle 23 having a suitable handle 22-. The end portions 24, 25 of said screw are inserted respectively in the sleeves 9, I2, one of said end portions being right hand threaded, while the other is left hand threaded, so that by rotating the screw 23 by means of the handle 22 in one direction or the other the screw sleeves 9, l2 and the elements connected to them can be forced towards or from each other.
The vise discribed acts in the following manner.
When a piece of work is to be clamped, the screw sleeves 9, l2 and the elements connected to said sleeves are slid en bloc towards the fixed jaw 1, the'clutch member I! permitting said sliding movement because, even under the influence of the spring 20, only a slight frictional resistance is exerted thereby. The piece of work, in this way, is preliminarily gripped between the jaws l, 8 whereupon by partially rotating the handle 22 and thus the screw 23 in a clockwise direction (according to Figure 3), the screw sleevesll, I2 are forced in the direction away from each other. As the clutch member I1 prevents a backward movement of the screw-sleeve l2, the'jaw 8 is effectively forced in a direction towards the jaw i, so that the piece of work is firmly gripped. When the piece of work is to be released it is sufficient simply to: turn the spindle in the opposite direction. If the screw sleeves are to be moved away from the fixed jaw I, the handle 22 and with it the screw 23 is turned so far in an anticlock-wise direction (according to Figure 3) that the slide ll abuts against the narrower end of the clutch member I! and slides said member against the action of the spring 20, whereby the friction grip between the clutch member and the slide-surfaces l6 ceases, and the desired backward movement of the screw sleeves can be freely performed.
The present vise is capable of considerable 3 modification and such changes thereto as come within the scope of the appended claims is deemed to be a part of the invention.
What I claim is:
1. A screw vise comprising a base, a jaw fixedly mounted on said base, means forming guideways extending towards said fixed jaw and mounted on said base, a jaw carrying slide slidably mounted on said guideways, a second slide slidably mounted on said guideways and having the side thereof facing the bottom of said guideway slanting downwardly towards said first mentioned slide, a wedge providing a locking clutch for said second slide being slidably positioned between said slanting bottom of said second mentioned slide and the bottom of said guideway with the thin edge of said wedge extending from said secondslide towards said first slide for being moved to an unclutching position upon contact therewith, means for moving said slides in opposite directions at the same time along said guideways, and resilient means tending to retain said wedge beneath said second slide.
2. A screw vise comprising a base, a jaw fixedly mounted on said base, means forming guideways extending towards said fixed jaw and mounted on said base, a jaw carrying slide slidably mounted on said guideways, a second slide slidably mounted on said guideways and having the side thereof facing the bottom of said guideway slanting downwardly towards said first mentioned slide, a wedge providing a retaining clutch for said second slide being slidably positioned between said slanting bottom of said second slide and the bottom of said guideway with the thin edge of said wedge extending from said second slide towards said first slide and said fixed jaw whereby movement of said second slide from said fixed jaw causes said wedge to retain said second slide in position and movement of said slides towards one another causes said first slide to move said wedge to an unclutched position relative to said second slide, means for moving said slides in opposite directions along said guideways at the same time, and a resilient finger mounted on said second slide and contacting the thick edge of said wedge for tending to move said wedge with said second slide during its movement towards said CARL STIG LENNART WERNE.
References Cited in the file-of this patent UNITED STATES PATENTS Number Name Date 575,686 Brockett Jan. 26, 1897 1,134,347 Peterson Apr. 6, 1915 1,183,733 Hulthin May 16, 1916 FOREIGN PATENTS Number Country 7 Date 318,816 Great Britain Sept. 12, 1929