US2552738A

US2552738A - Quick action precision vise

Info

Publication number: US2552738A
Application number: US765529A
Authority: US
Inventors: Harold G Renner
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-08-01
Filing date: 1947-08-01
Publication date: 1951-05-15
Anticipated expiration: 1968-05-15

Description

y 951 H. G. RENNER 2,552,738

QUICK ACTION PRECISION VISE Filed Aug. 1, 1947 INVENTOR.

' HAROLD G.RENNER J I BY J MTORNEY 3 Patented May 15, 1951 UNITED STATES PTIENT OFFICE QUICK ACTION PRECISION VISE Harold G. Renner, Detroit, Mich.

Application August 1, 1947, Serial No. 765,529

1 Claim. 1

This invention relates to vises and particularly Vises designed to maintain accurate parallelism of the clamping faces of their jaws.

An object of the invention is to improve a vise of the type in which a jaw slides on a base to and from a fixed jaw, and is clamped to the base in selective positions by setting up a tensional reaction between the sliding jaw and an anchorage member slidably confined in the base, the improvement consisting in a provision for interlocking the anchorage member and base by means of serrations.

Another object is to form said serrations in a novel and relatively inexpensive manner.

Another object lies in attaching to said anchorage member a shank extending upwardly through the sliding jaw to set up said tensional reaction, imposing such reaction on a face of the sliding jaw inclined to the direction of sliding to cam said jaw forwardly responsive to said reaction, affording said shank a forward and back play in the sliding jaw to permit the desired camming effect, and yieldably urging the shank to its forward limit of such. play.

Another object is to dispose an anchorage member for the sliding jaw of a vise in a chamber in the vise base, elongated in the direction of travel of said jaw, and to. form mating screw threads in said chamber and on the anchorage member, and to afford the anchorage member base, fixedly carrying on one of its ends a jaw 2,

formed integral with the base in the illustrated embodiment of the invention. Slidable on the base to and from the jaw 2 is a jaw 3 having a pair of guide flanges 4 downwardly projecting from the lateral margins of its bottom face and fitting in guideways 5 marginally formed in the base. The

jaws

2 and 3 have parallel workclamping faces 6 accurately perpendicular to the top face of the base. The sliding jaw has a cam face 1 extending downwardly and rearwardly from the top of said jaw, preferably at an angle of forty-five degrees to the direction of sliding travel. Said jaw also has a rearward extension 8 at the bottom of said cam face, such extension having a relatively slight vertical thickness.

Extending lengthwise of the base, from end to end thereof, is a chamber 9, preferably a drilled hole tapped with a fairly fine standard V-type screw thread, as for example, thirty-two threads to the inch. A slot ll]. opens from the chamber 9 to the top face of the base, such slot extending from the jaw l to the rear end of the base and having a width considerably less than the diameter of said chamber. Disposed in the chamher 9 is an anchorage member H for the sliding jaw, preferably somewhat elongated lengthwise of said chamber, the top surface of said anchorage member being transversely arcuate, conforming to the wall of said chamber and be ing formed with a partial male screw thread, such as to accurately mate with the female; thread formed by the wall of said chamber. The described anchorage member may be simply formed by grinding away its sides and bottom after initially cutting a full thread adapting said member to screw into the chamber 9, such grinding affording said member a vertical play in the chamber 9, such that the remaining serrations of said member may be engaged with or disengaged from the interior serrations of the chamber 9. The anchorage member is attached to the lower end of an elongated shank l2 which extends upwardly through the slot It and through a slot l3 vertically bisecting the rear portion of the sliding jaw. It is preferred to insert the shank l2 in a slot formed in the front end portion of the member II and to pivotally connect said member to the shank, as by a pin I4. The shank l'2 extends transversely to the cam face I, and the forward end of the slot 13 has a similar relation to said face. In passing through the slot l3 the shank has flat lateral faces to engage the opposed walls of such slot, and an end portion lZa of the shank projecting above the cam face 1 is cylindrical and threaded to receive a nut I5. By tightening such nut against the face 1, the anchorage member may be drawn into interlocking engagement with the top face of the chamber 9 and a forward thrust may then be applied to the sliding jaw. A spring l6 formed by an elongated strip of sheet metal projects from the extension 8 of the sliding jaw forwardly into the slot l3 and has its forward end downwardly curved to apply a forward thrust to the shank l2. Said spring has an integral enlargement I611 at its rear end secured by screws I! to the extension 8.

In use of the described vise, an object to be clamped is placed against the jaw 2 and the jaw 3 is slid forward to engage said object, the anchorage member being then in a lowered position in the chamber 9, so that it may travel freely with the jaw 3. The operator now screws the nut I5 down on the threaded end of the shank, drawing the latter up together with the member II and thus interlocking the threads of such member with those of the chamber 9. As the nut I5 applies further pressure to the face i, the jaw 3 is cammed forwardly to tightly clamp the object against the jaw 2., The forward edge of the slot I3 is moved slightly away from the shank l2 during this clamping travel of the jaw 9, the spring I6 yielding to permit such movement. As soon as the nut is retracted from the surface 1, the spring [6 slides the jaw 3 slightly away from the clamped object, allowing a ready removal of such object. The anchorage member continues, however, to retain the jaw 9 in place to be again cammed to the same clamping position, in case another object of the same size is inserted between the jaws. Thus the described vise lends itself to quantity production work in which a plurality of like work pieces are required to be held in sequence in the vise. If it is necessary to retract the sliding jaw in excess of its camming travel, the anchorage member is releasable by applying a slight downward pressure to the shank l2.

Forming screw threads on the top faces of the member If and chamber 9 to afford interlocking of said faces is a rapid and inexpensive method of serrating said faces and assuring a desired uniform spacing of the serrations. It is to be noted that it would be a relatively difiicult matter to serrate, in any other manner the top face of such a chamber as is indicated at 9. It would further be difiicult to produce in any other manner, than the work-engaging end of the sliding jaw that primarily detracts from the accuracy of most inexpensive vises. It is evident that such tilting -may not occur in the described vise, since the shank i2 is extended in close proximity to the lower edge of the clampingv face of the sliding law.

It is a further advantage of the described vise that the means provided for imposing a clamping pressure on the sliding jaw does not materially tend to bow the vise base upwardly between its ends as do many vises in present day use. While such distortion of the base is of small magnitude, it is sufficient to seriously detract from accuracy.

What I claim is:

A vise comprising a base, a pair of clamping jaws on the base, one slidable toward the other, an anchorage member for the sliding jaw, the base having a chamber beneath the sliding jaw elongated in the direction of sliding of said jaw and receiving the anchorage member, the base also having a slot opening from said chamber to the top face of the base and extending lengthwise of said chamber, the width of said slot being less than that of the anchorage member, serrations extending in a substantially transverse relation to said chamber in the top faces of the chamber and anchorage member and proportioned to intermesh, a shank attached to the an chorage member and extending upward at a rear ward inclination through said slot and through the sliding jaw, such jaw having a slot receiving the shank and extending to the rear end of such jaw and affording the shank a forward and back play, such slot having a wall adjacent to and forward of the shank and conforming to the shank inclination, a spring having an end thereof mounted on the rear end of the sliding jaw and projecting forwardly in said slot of the sliding jaw to engage said shank, and means reacting between the shank and sliding jaw to stress the anchorage member upwardly and interlock its serrations with those of said chamber.

HAROLD G. RENNER.

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

UNITED STATES PATENTS