US2302943A - Attachment for vises - Google Patents

Description

' Nov. 24 1942. a. HASELWOOD 2,302,943 ATTACHMENT FOR visras Filed May 20, 1941 i muul'ifi I Geo/2e fIZ-Sdll/OOLL.

Patented Nov. 24, 1942 UNITED STATES PATENT OFFICE ATTACHMENT FOR VISES George Haselwood, Regent, N. Dak. Application May 20, 1941, Serial No. 394,375

Claims.

The present invention relates to jaw attachments for vises and refers particularly to an attachment adapted to accommodate round work,

such as pipes and the like.

An object of the invention is the provision of a device which may be easily and quickly attached to, and removed from, the jaw of a vise.

Another object is to provide an attachment of this character which requires little or no alteration to the vise. attachment may be mounted on a standard type of vise, and the only requirement is the provision of a stud or pin projecting outwardly from the outer face of the stationary jaw of the vise. This stud is adapted to engage the base of a substantially V-shaped strap, the outer ends of the strap being secured to a work-receiving member. The work-receiving member is designed to straddle the stationary jaw of the vise and is held in operative position by the engagement of the strap with the stud. One of the features of the precent invention is that the strap, while rigidly secured to the work-engaging member, nevertheless, has sufiicient springiness to permit the member to be snapped on and off the jaw, as desired.

With the foregoing and other objects in View, the invention will now be more particularly described, reference being had to the accompanying drawing in which:

Figure l is a side elevation of a vise, with the present attachment in operative work-holding position;

Figure 2 is a fragmentary View of the vise, showing the attachment in partially-attached position in full lines, and in fully-attached position in dotted lines; and

Figure 3 is a perspective view of the attachment.

Referring to the drawing, Figure 1 illustrates the present invention applied to a standard type of vise IQ, having an inner stationary jaw ii and an outer movable jaw !2. As is usual with Vises of this character, each jaw is formed with a fiat, work-engaging face It which connects with flat side walls M to form a block-like, workgripping portion.

The inner jaw I! is rigidly connected to a curved, intermediate portion which is rigid with the base It of the vise. This base is provided with a suitable opening for receiving the slide i'l. This slide is connected to the outer jaw it. by means of the curved portion it. As is usual with this type of vise, the jaws ll and i2 may be moved into and out of operative engagement by operating the handle it. means, such as the hand-operated screw bolt 20, having the head 2|, may be utilized to detach" ably clamp the vise to a work table or other support 22.

While a vise of this character is quite efficient In other words, the present Any suitable for flat work, it is not adapted to efficiently take care of round work, such as pipes and the like. The present invention is designed to eliminate this difiiculty by the provision of an attachment particularly adapted to accommodate round or irregular work. This attachment is so constructed that it may be easily and quickly applied to, and removed from, the vise M3; furthermore, the only alteration necessary to place the vise in condition for receiving this attachment, is to secure a pin or stud 23 on the curved portion l5 (see Figs. 1 and 2). The stud 23 is preferably threaded so that it can be easily screwed into a threaded opening in the curved portion It.

The present attachment comprises a workengaging member 2 and a jaw-engaging or attaching element 25. The member 2 1 is preferably in the form of a pair of bars 26 and 21 which are substantially rectangular in cross-section, and are joined along adjacent longitudinal edges by a web 28. This construction forms an upper or outer longitudinally-extending, rightangled groove or recess 259 which is preferably serrated or roughened, and adapted to receive a piece of pipe 30 or other round work, as clearly shown in Figure l. and 2.

This particular arrangement of the bars 26 and 2? also forms a lower or inner substantially right-angled groove or recess 3! which is adapted to straddle the fiat face it of the inner jaw H. As clearly shown in Figure 1, when the member 2 is in operative position, the sides of the groove 3| will not only straddle the inner jaw it, but will be in substantially line contact with the upper and lower longitudinal edges of the fiat face it of this jaw. Thus, when the outer jaw is moved inwardly into work-engaging position, the member 52 5 will be effectively clamped opera tive position, and by reason of the line contact between the sides of the groove 3i, and the 1ongitudinal edges of the face l3 of the jaw H, these edges will tend bite into sides of the bars 255 and Bl forming the groove 3 i, as pressure is applied by the outer jaw 42.

The attaching element .223 comprises a substantially V-shaped strap or yoke having the ends of its legs rigidly secured to one face of the block 21. While this strap is fairly rigid, nevertheless, it has sufficient springiness to permit slight relative movement between the and member 2% whereby the member may be snapped over the lower jaw i i.

It is to be understood that the present attachment is particularly proportioned to the dimensions of the vise Hi, and that the attachment must necessarily be constructed of a size to accommodate a particular type of vise. In the present construction, the strap 25 is formed of a size which will permit its reduced lower end to be slipped 0r hooked over the stud 23, so that the lower face 32 of the block 26 will contact the upper longitudinal edge of the inner jaw I I. As clearly shown in Figure 2 in full lines, the dimensions are such that the point of contact will be adjacent the inner edge of the face 32; that is, in close proximity to the lower or inner groove 3| so that only relatively slight pressure on the member 24 is necessary to snap it over the inner jaw I I into operative position shown in dotted lines in Figure 2. As stated above, this action is facilitated and permitted by reason of the slight springiness of the strap or yoke 25. After the bar 26 has been moved past the upper longitudinal edge of the jaw II, the rest of the attaching operation is Very simple, since very little pressure is required to make the edge of the bar 26 clear the lower longitudinal edge of the jaw II. In fact I have found in actual practice that the force necessary to move the bar 26 past the upper longitudinal edge of the jaw II will carry over and easiiy move the edge of bar 26 past the lower longitudinal edge of the jaw I I.

After the pipe or other round work has been. clamped in the vise, it will be observed that the pressure of the outer jaw will tend to move the base portion of the strap 25 out of direct engagement with the stud 23. However, the relative dimensions of the stud and the strap are such that any outward or upward movement of the strap would move it into contact with the stud before it could clear the same. words, the stud 23 not only acts as a pivot about which the attachment is swung when it is moved to operative position, but also constitutes means for preventing accidental removal or displacement of the attachment. 23 is threaded, provides a substantially roughened surface which further prevents accidental removal of the stud from the strap.

When it is desired to remove the attachment from the vise, this may be accomplished by a reverse action; that is, by exerting an upward pressure on the member 24, the inner face of the bar 26 will readily snap, first past the lower longitudinal edge of the jaw I I, and then over the upper longitudinal edge of the jaw, after which the strap may be disengaged from the stud 23.

The member. 24 has been described as constituting a pair of blocks or bars 2t, 2i, which are joined together by a web 28 connecting adjacent longitudinal edges of the bars. This member may be constructed out of two separate bars which are welded together to form the web 28 or, if desired, the member constituting the two bars and the web may be fashioned as a single unit by any desired metal-shaping operation.

It is to be further understood that the form of the invention shown and described is illustrative of the preferred embodiment, and that such changes may be made which do not depart from the scope of the claims.

I claim:

1. A work-gripping attachment for vises comprising a work-engaging member consisting of a pair of bars substantially rectangular in crosssection having adjacent longitudinal edges rigidly joined together to form a pair of longitudinallyextending right-angled grooves, one of said grooves being adapted to receive the work, the other groove being adapted to engage opposite longitudinal edges of the vise jaw in substantially line contact, and an attaching element secured to said member to removably mount the member on a vise jaw.

In other The fact that the stud 2. A work-gripping attachment for Vises comprising a work-engaging member consisting of a pair of bars substantially rectangular in crosssection having adjacent longitudinal edges rigidly joined together to form a pair of longitudinallyeXtending right angled grooves, one of said grooves being adapted to receive the work, the other groove being adapted to engage opposite longitudinal edges of the vise jaws in substantially line contact, and an attaching element rigidly secured to a side of said member and adapted to hook over a projection on the jaw, said element having sulncient springiness to permit the jawengaging portion to be snapped over the jaw into operative position while said element is in contact with the projection.

3. A work-gripping attachment for vises comprising a work-engaging member consisting of a pair of bars substantially rectangular in crosssection having adjacent longitudinal edges rigidly joined together to form a pair of longitudinallyextending right-angled grooves, one of said grooves being adapted to receive the work, the other groove being adapted to engage opposite longitudinal edges of the vise jaw in substantially line contact, and an attaching element consisting of a substantially V-shaped strap having its endsrigidly secured to a side of one of the bars and adapted to lie close to the outer side of the vise jaw and hook over a projection on the jaw, said strap having suificient springiness to permit the jaw-engaging portion to be snapped over the jaw into operative position while the strap is in contact with the projection.

4. In combination, a vise having a pair of jaws, each with a flat Work-engaging face, an anchoring stud projecting outwardly from the side of one of the jaws below its flat face, and a work-gripping attachment detachably connected to said lastmentioned jaw, said attachment consisting of a pair of bars substantially rectangular in crosssection and having adjacent longitudinal edges rigidly joined together to form a pair of longitudinallY-extending right-angled grooves, one of said grooves being adapted to receive the work. the other groove engaging opposite longitudinal edges of the last-mentioned jaw in substantially line contact, and an attaching element consisting of a substantially V-shaped strap rigidly secured to a side of one of the bars and engageable over the stud on the jaw, said strap having sufiicient springiness to permit the bars to be snapped on and off the jaw while the strap is hooked over and in contact with the stud.

5. A work-gripping attachment for Vises comprising a work-engaging member having a longitudinally extending recess adapted to receive a jaw of a vise, and an attaching element overlapping the top of the jaw, said attaching element comprising a substantially V-shaped strap having its ends secured to a side of said member above said recess, the closed end of said strap being relatively rigid and arranged to hook over a projection on the jaw, said strap having sufficient springiness to permit the recess of the work-engaging member to be snapped over the jaw into operative position when the closed end of said strap is in contact with the projection. in order to firmly hold the attachment rigidly on the vise.

GEORGE HASELWOOD.

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