US1569213A - Razor-blade sharpener - Google Patents

Description

S. S. BAER RAZOR BLADE SHARPENER Filed Dec. 18, 1924 Jan. 12 ,1926. "1,569,213

Patented Jan. 12-, 1926.

PATENT OFFICE.

SAMUEL S. BAER, OF BALTIMORE, MARYLAND.

RAZOR-BLADE SHARPENER.

Application filed December 18, 1924. Serial No. 756,840.

T all whom it may concern.

Be it known that I, SAMUEL S. BAER, a citizen of the United States, residing at Baltimore city, in the State of Maryland, have invented. certain new and useful Improvements in Razor-Blade Sharpeners, of which the following is a specification.

This invention relates to edge-tool sharpeners, and especially to a very simple and practical razor blade sharpener.

One object of this invention is to provide a device of this character that has maximum convenience in applying the razor blade in the sharpening position.

Another object is to provide a device of this character having no gears and no handle, and requiring no fixed place of attach- I mg it for operation.

Another object is to provide a device ofthis character that is composed of few and very simple parts in a compact combination, such parts being quickly disassembled and reassembled for the purpose of cleaning and interchanging the sharpening elements.

Another object is to provide a device of this character that is operable by one hand of a person holding the razorblade and using the latter as an actuating element for moving the sharpening elements and also for moving the edge of the blade from one to the other of the sharpening elements.

Another object is to provide a device of this character in which the sharpening elements are housed against the action of atmospheric conditions and against the accumulation of dust thereon.

Other objects and important features are pointed out or implied in the following details of description, in connection with the accompanying drawings in which:

Fig. l is a perspectlve view of the complete tool sharpening device, in the form of a razor blade sharpener. 1

Fig. 2 is a longitudinal sectional view.

Fig. 3 is a sectional view along the line 33 of Fig. 2.

Fig. 4 is a detail view of one of the sharpening rollers detached from the balance of the device.

Referring to these drawings in detail, in which similar reference characters correspond to similar parts throughout the several views, a casing 5 and its cover 6 constitute a closed box or housing in which two rollers or sharpening elements '7 are enclosed and th protect d from Weather conditions and the accumulation of dust thereon. Each roller 7 may be made of any ap propriate material for abrading or polishing the edges of the razor-blades which are inserted (one at a time) in a slot 8 which is only wide enough to permit the respective razor blades to be inserted therein, so the relatively thick backs or holders of the razor blades will not pass into this slot, but the same rests on the margins of the slot and prevents the edge of the razor blade from extending below the proper level to engage the sharpening rollers at the proper angle or tangent for best results in sharpening the blade. In this connection, it should be un-- derstood that the razor-blades are tilted from the vertical position for bringing the edges against the sharpening elements or rollers, as will presently appear.

The casing 5 is provided with two pairs of angular slots 9 of which the lower and laterally or horizontally extending ends form bearings for the axles 10 of the sharp ening rollers. The cover 6 is formed with two pairs of slots 11 which open through the lower edge of the cover and receive said axles in the relation for holding them in the bearings when the cover is on the casing; but by removing the cover, the axles are released so that the rollers can be easily and quickly removed and replaced or interchanged.

Each roller is provided with two traction wheels 12, on the axles at its opposite ends, these wheels being of a considerably larger diameter than the sharpening part of the roller. The journal portion of each axle 10 is between the adjacent traction roller and the sharpening roller, so that the latter is spaced above the bottom of the casing, while the traction rollers are outside of the casing and extend below the lower surface of the casing. Each traction roller is preferably provided with treads of rubber or other ma terial that will not deface the top of a table or other furniture on which they may be rolled in the operation of the device.

In operating the device, the razor-blade is first inserted in the slot 8, and its thickened portion or holding member (it rests on the margin of the slot, while the thinner main part of the blade extends between the rollers 7. Now, by bearing lightly on the razor blade, both downwards and in a horizontal direction, this causes the razor-edge t h r ag in t n of the roller a d a we the other roller, and also causes a reversal of the direction of movement of the rollers and of the entire device, thus sharpening the blade from the other side. By successively repeating the reversal of the horizontal I movement, the blade soon becomes ready for use.

I do not intend to limit my patentprO- tection to the exact form and arrangement here shown, but the inventlon contemplates numerous changes within the scope of the claims.

l'Vhat I claim is: r

1. In a sharpening device, the combination of a sharpening roller provided with journals and with traction rollers, and a box havlng bearings for sald ournals, the

sharpening surface of said sharpening roller being enclosed within said box, the traction rollers extending below the bottom of the box and adapted to roll on a table or other plane surface and thereby impart rotary movements to said sharpening roller, the top of the box being formed with a slot within which part of a blade may be inserted and tilted on the edge of the slot in one direction into contact with the sharpening surface while the remainder is grasped and used to propel the device in an opposite direction over a surface.

2. In a sharpening device, the combination of two spaced sharpening rollers each provided with journals and with traction rollers, and a box having bearings for said journals, the sharpening surface of each sharpening roller being enclosed within said box, the traction rollers extending below the bottom of the box, the top of the box having a slot within which part of the blade may be inserted and tilted on the edges of the slot alternately in opposite directions into contact with the sharpening surfaces of the sharpening rollers while the remainder of the blade is grasped and used to propel the device in opposite directions over a surface and for effecting, the tilting of the blade on said edges'of the slot. I

3. In a sharpening device, the combination of a sharpening roller provided with journals and traction rollers,'and a body having bearings for said journals and having in its top part a slot within which a part of a blade can be inserted and tilted on the edge of the slot in one direction into contact with the sharpening surface while another part of the blade is grasped and used to propel the device, in the opposite direction from that in which the edge is tilted, on a surface on which the traction rollers operate to turn said sharpening roller.

4. In a sharpening device, the combination of two sharpening rollers provided with journals and traction rollers, and a body having bearings for said journals and having its top part provided with means to suspend a blade between said sharpening rollers in such relation that the blade can be grasped and used as a handle by which the device can be rolled forward and rear.-

ward on its traction rollers and thus rotate the sharpening rollers and also the blade tilted forward and rearward for pressing the rear side of the blades cutting edge against the forward sharpening roller and for pressing the front side of the cutting edge against the rear sharpening roller, substantially as shown.

' In testimony whereof I afiix my signature.

. SAMUEL s'. BAER.

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