US2438977A - Sanding device - Google Patents

Description

- April 6, 1948. E. ROSEMEYER I 2,438,977

SANDING DEVICE Filed May 16, 1947 2 Sheets-Shgefl 1 INVENTOR. flkarleslifiosemeyer ATTORNEY April 6, 1948. c. E. ROSEMEYER 2,438,977

SANDING DEVICE Filed May 16, 1947 2 S heets-Sh eet' 2 INVENTOR. Cbar/asERase/myer BY m ATTORNEY Patented Apr. 6, 1948 UNITED STATES rTENT OFFICE Charles Earl Rosemeyer, Seattle, Wash.

Application May 16, 1947, Serial No. 748,509

1 Claim. 1

My invention relates to hand sanding devices.

The principal object of my invention is to provide a sander which is economical in manufacture and easily and effectively handled in smoothing and finishing surfaces.

Another object of the invention is to provide a sanding device in which the sand paper or the like may be readily affixed and removed from the tool.

A further object of my invention is to provide a sander which will permit the full utilization of the sanding or abrasive surface and at the same time provide a longer life to said abrasive surface. Referring now more specifically to the accompanying drawings which illustrate my invention:

Fig. 1 is a perspective view of my sand paper block with the sand paper gripped ready for use.

Fig. 2 is a perspective showing the cover turned spreading the clamps in releasing the sand paper.

Fig. 3 is a perspective of the body of the sand paper block.

Fig. 4 is a plan view of the block With the top cover removed.

Referring more particularly to the drawings, reference numeralfi (Fig. 3) represents the body of the block in its entirety. The top surface I of the block is provided with two elevated longitudinal ribs 8 and elevated portions 9 between which and the ribs 8 are formed grooves .or slides I3. Below the surface 1 is an elliptical depression ll, below the bottom surface of which is a round depression l2, the centers of the depressed ellipse II and depressed circle l2 coinciding with the center of the block 6. In the center of the block (also the center of the depressed ellipse H and circle I2) is firmly secured an upright bolt l3 threaded at its top end as shown at I4. The ends of the block 6 are notched out as shown at It into which is cemented soft rubber blocks IS the top edge of which is flush with the surface 1 of the block. The thickness of the rubber blocks i5 is slightly less than the width of the notches l5 thus forming a narrow shoulder H. The top edges of the block 6 are grooved out as shown at I8 to form convenient hand grips. The lower surface of the block 6 is provided with a rubber Reference numeral 25 represents two curved levers consisting of a straight portion 26 and inner curved ends 21. In the ends of the straight portion 26 are rigidly secured small upwardly projecting pins 28 the upper end of which pass freely through holes 29 in the metal plates 20. The inner curved portion 21 of the levers are perforated to rotatively receive upwardly projecting screws 30 the upper end of which are screwed into the under side of the top cover 3|. The top cover is drilled in the center so as to rotate freely about the center bolt I3. The center of the cover 33 is counter sunk as shown at 32 (Fig. 2) to receive the nut 33 threaded over the top of the bolt l3.

Reference numeral 34 represents a strip of sand paper with upturned ends 35. When the top cover 3| is in registry with block 6 as shown in Fig. 1 the metal plates 20 are drawn inwardly towards each other'as shown in Figs. 1 and 4, Their downwardly bent ends 2| gripping the upwardly turned ends 35 of the sand paper. The resiliency of the rubber block I6 as will be noted form a more positive grip on the upturned ends 35 when the "downturned ends 2| of the metal plates 26 are clamped against it.

The method of operation is as follows:

To place a sand paper in the block the cover 3| is first turned in the direction of the arrow (Fig. 2) until it is crosswise of the body 6 as shown. The rotation of the cover 3| it will be noted (Fig. 4) rotates the screws 30 about the bolt l3 moving the ends of the levers 25 with them till they occupy the position shown in the dotted lines (Fig, 4), the upwardly projecting pins 28 of the levers 26 moving the metal plates 20 outwardly away from each other till they occupy the position shown in the dotted lines in Fig. 4 and also in the position shown in Fig. 2. The strip of sand paper 34 now is cut to the proper length and the ends turned upwardly as shown (Fig. 2). The ends 35 of the sand paper are now slipped upwardly between the rubber blocks l6 and the downwardly turned ends 2| of the plates 20 and the cover 3| turned back to the position as shown in Fig. 1 the ends 2| of the metal plates firmly gripping the ends of the sand paper against the rubber block l6 and the sand paper block is ready for use.

Having described my invention I claim:

In a holder of the character described, a pair of members in movable superposed relation, one of said members having its inner face provided with a pair of recesses, one of which bein below and within the other, raised portions on said 3 member on either side of said larger, upper recess, a pair of levers within said recess, screws upon which said levers are rotatably mounted, upwardly projecting pins disposed at the outer ends of said levers, means for moving said levers in opposite directions, metal plates at either end of said lower member and movably positioned thereon, cushions provided at either end of said lower member, a bottom plate withits sides bent at right angles and adapted to fit snugly over said lower plate, an abrasive sheet to fit over said bottom plate and bent in conformity therewith so as to engage the said metal and plates when same are opened by the action of said levers in their outward thrust and closed by the turning of the upper member in their inward thrust.

CHARLES EARL ROSENIEYER.

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