US2680334A - Holder for sandpaper and the like - Google Patents

Description

June 8, 1954 L. HowARb 2,680,334

HOLDER FOR SANDPAPER AND THE LIKE Filed Sept. 29. 1955 [Ea/web IVAPD, Dz (m2 Patented June 8, 1954 .lHOLDER, FOR SANDPAPEE AND THELIKE Leonard Howard, West Orange, N. J., assignor 120' Hardware Products Company, New 'York,

Application September 29, 1953, Serial No. 383,087

' Claims.

1 ,The present invention relates to a device for holding a piece of sand paper, blotting paper,

polishing fabric and the, like, for manipulation on a surface to be treated therewith.

An object of thisinvention is toprovide a de- Viceof the character mentioned having a. simple,

,novel and improved clamping means toholdthe I paper piece mounted and yet be easily removed therefrom and replaced.

Another object hereof is to provide a novel and improved device of the type described, whose clamping means employs a cam lever which presents a thumb guard when the device is in conwhich latter is relatively, expensive construction, and instead uses a cam wheel part-mounted-eccentricallyon an axis pin accomplishing complete assembly; which is a verycheap construction, re

quiring simple and easily maintained diesand tools for themanufacture of this article.

Another object of this invention is to provide a novel andimprovedtool of the kind mentioned which is easy to use and eiiicient in carrying out the purposes for which it is-designed.

Other objects and advantages will become apparent as this disclosure proceeds.

In the accompanying drawings forming part of this specification, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 is a pictorial view of a sand paper holder in use condition, embodying the teachings of this invention.

Fig. 2 is a similar view of the parts in exploded format.

Fig. 3 is a bottom view of the clamping member included in the embodiment herein.

Fig. 4 is a perspective View of a cam-supporting bar included in this device.

Fig. 5 shows a perspective of a slightly modified form of said bar.

In the preferred embodiment shown in the drawings, the numeral It indicates generally a mounting member for the sand paper sheet [6, which is releasably held thereon by a clamping member denoted generally by the numeral [7;

the latter offering a handle it so that the tool 28 can be held in hand for working therewith. Said clamping member is made to grip and. release its hold, by operation of a cam H) which is part of lever 2| the latter terminating in an upturned tab 22 which serves as the rest for the thumb of th users hand. If desired, the paperreceiving face of the mounting member I5, may be a cemented-on soft rubber slab23.

The mounting member [5 may be in any suitable form presenting a bottom surface and longitudinal side surfaces. Preferably, such bottom surface is rectangular and the longitudinal side surfaces are parallel. A practical form as illustrated, is a channel-made of'sheet metal, with metal of some resilient quality, and may beOf a singular rectangular blank formed into a channel having the side walls 25, 25. Along the entire length of such channel form it' is deepened midway-between said sidewalls 25, 255, to form a central longitudinal channel having a narrow "longitudinal entrance 26 into a: comparatively broader space whose confining-wall may be cylindrical to the handle I 8.

A rigid member 2i is positioned, across the entrance opening-2t and is secured or suitably anchored to th clamping member, onlybetween said entranceand thesidewall 25. Such :mem-

ber when in the .formishown at 29,-is rivetedzonto said clamping member H in the region of the slot 3t which would then be a mere hole to receive the securing rivet, but for easy assembly, such member may be as shown as 2? so it can be hooked on through the slot 39. Between said opening 26 and the wall 25, said clamping member ll has a slot 32 perpendicular to said wall and over said member 2?. A rivet 33 is through said slot 32, anchored on said member 27, and serves as the axis pin for the cam 19. Such rivet 33 is suitably headed to maintain the assembly shown and is fitted in said slot 32 for lateral movement therealong.

Said entrance opening 26 is formed by the spaced walls 3d, 34. Since the distance from the mentioned axis rivet 33 to wall 34 is a constant, the action of the cam 19 which is against the wall 34 is to push said wall 34' towards the wall 34, and thus decrease the width of said opening 25,

. 3 thereby bringing the walls 25, 25' closer together sufficiently to clamp the mounting member [5 between them to make a sanding or similar tool 20, of unitary structure, as shown in Fig. l. The cam surface 19' is symmetrical and eccentric with respect to axis 33 and lever 2 I, and is such that when said lever is alongthe handle l8, at either end of the tool 20, the mentioned clamping action takes place. Hence the said lever can be set so that the tab 22 may serve as a thumb rest for right-handed or left-handed users, for such tab may be at either end of said tool. For simplicity of structure, the cam 19 is on the top surface of the clamping member 17 when the tool 28 is in use condition; such top surface being really the underside of the channel whose side walls are 25, 25. The clamping member I! is of course removable when the lever 2! extends laterally of the handle l8, as shown in Fig. 2. It is of course essential that the slot 32 be positioned and of sufficient length to permit the movement of the entrance wall 34' with respect to the entrance wall 34. If it is desired that the tool be for use where tab 22 shall serve as a thumb rest for only righthanded users, then that portion of the cam is which is in front of line A in Fig. 1, may be omitted.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired. that the embodiment herein be deemed illustrative and not restrictive and that the patent cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific description herein to indicate the scope of this invention.

I claim:

1. In a holder for a piece of sand paper or other sheeting, a mounting member presenting a bottom surface and longitudinal side surfaces, 2. sheet member resting against said bottom surface and bent up against said side surfaces of the mounting member, a clamping member comprising an inverted main channel set so that its side walls lie respectively along and adjacent to and have between them the said side surfaces of the mounting member and said sheet member; said main channel being deepened along its entire length between its side walls to form a handle; said deepened portion being a channel whose side walls have some resilient quality, a cam-carrying member within said main channel, positioned across the entrance opening of the channel forming the handle and secured to the clamping member only to one side of said entrance opening, an axis pin mounted on said cam-carrying member at the other side of said entrance opening, a peripheral cam carried on said pin for rotation abOut the axis of said pin, the periphery of said cam, upon turning said cam in one direction, being positioned to contact and push one side wall of the channel forming the said handle towards the other side wall of said channel forming said handle, whereupon one side wall of the main channel will approach the other side wall of said main channel and thereby clamp the sheet member against the mounting member and upon turning said cam in the opposite direction, the said wall which was pushed, will be released and return to its normal rest position where said entrance opening is widened to its original dimension, whereupon one of the walls of the main channel will move to release the hold of the sheet member; the mentioned pushed wall of the channel forming the handle, being the one nearest the axis pin.

2. The holder for sheet material as defined in claim 1, wherein the clamping member is of one piece of sheet metal having some resilient quality.

3. The holder for sheet material as defined in claim 1, wherein the axis pin extends through a slot in the clamping member and the cam is on the upper side of the main channel to one side of the handle.

4. The holder for sheet material as defined in claim 3, wherein the cam has a handle extending therefrom to facilitate the turning thereof about the mentioned axis and wherein such last mentioned handle is in position to serve as a thumb rest when the sheeting is clamped.

5. The holder for sheet material as defined in claim 4, wherein the cam is so shaped that the free end of its handle is furthest from the handle of the clamping member when the mentioned entrance opening is maximum width permitted by said cam and wherein said cam handle presents an upturned tab at its free end to serve as a thumb rest, said cam causing a narrowing of said entrance opening to effect clamping of the sheet member onto the mounting member when said tab is positioned at either end of the clamping member.

References Cited in the file of this patent UNITED STATES PATENTS Number

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