US1958937A - Razor sharpener - Google Patents

Description

May 15, 1934. J. BAUMGARTNER RAZOR SHARPENER Filed March 18, 1932 g @w 1+ a @E Z u Patented May 15, 1934 UNITED STTES PATENT 1 Claim.

This invention relates to a razor sharpener and more particularly to an improved means for retaining positively upon a rotating shaft the razor blade holding mechanism herein described.

At the present time razor blade sharpeners of this type will not function properly because there is a tendency for the blade holder, which is mounted upon a rotating shaft, to ride off the shaft and thus defeat the function of the device.

An object of the present invention is to provide a novel means incorporated in the blade holding mechanism which will at all times, due to its association with the rotating shaft and the structure of this shaft, retain the blade holding mechanism positively upon the shaft at a fixed position and prevent any lateral movement in relation to the shaft.

Other objects and advantages of this invention will appear in the following specification, referv ence being had to the accompanying drawing, in

which Figure l is a perspective view of the invention; Figure 2 is an end view;

Figure 3 is a side View;

Figure 4 is a horizontal sectional view taken on line 44 of Figure 3;

Figure 5 is a front view of one half of the blade holder, and

Figure 6 is a front View of the other half.

In the drawing wherein like reference characters designate like parts throughout the several views, 1 indicates a gear housing containing the gear 2, the idle gear 3, and the gear 4. The back face of the housing is closed by a suitable cover plate 5 and held thereon by screws 6.

The shaft 7 is journaled in a portion 8 of the housing, and is rotated by the crank handle 9. The shaft 7 is provided with an annular groove 10. Adapted to be mounted upon the shaft '7 are the complementary plates comprising blade holders 20 and 30.

The plate 20 comprises a handle tab 21 having a raised knob 22, and a body portion 23 having the raised knobs 24 and 25. The handle tab 21 and body 23 are joined by curved portions 26 and 26 forming an opening 2'7 therebetween. It should be noted that the handle tab 21 is slightly offset with relation to the body 23, as shown in Figs. 1 and 2.

The plate 30 likewise is provided with a handle tab 31, having a raised knob 32, and a body portion 33 having the apertures 34 and 35. The handle tab 31 and body portion 33 are joined by a curved portion 36 provided with an upset portion 37 raised therefrom a distance slightly less than the depth of groove 10 on shaft 7. It will be seen that the body 33 and handle tab 31 are likewise slightly offset from each other.

When the members 20 and 30 are arranged upon the shaft 9, as shown in Figs. 1, 2 and 3, with the portion 36 of member 30 extending through the aperture 27 of member 20, a guideway is formed through which the shaft '7 passes with the upset portion 37 of member 30 coming to rest in the groove 10 of shaft 7. A coil spring 40 is positioned in relation to the tabs 21 and 31 as shown in Figs.

2 and 3. The upraised portions 21 and 31 of these tabs fit within the end of the coil spring 40 and prevent its displacement. It will be obvious that the function of the coil spring is to push the tabs 21 and 31 apart, and as the members 20 and 30 are pivoted about the shaft '7, this will tend to force the lower body portions 23 and 33 provided with the upraised knobs 24 and 25 and the apertures 34 and 35 respectively, firmly together. A razor blade is firmly held between the lower portions 23 and 33, the knobs 24 and 25 passing through the blade and locking in apertures 34 and 35, as shown in Figs. 1, 2 and 3. A shaft 41, keyed to gear 4 and supported by journal 42, 30 carries the abrasive member 43.

The device is held in one hand by the handle 45 and by turning the crank 9 and shaft 7 is caused to rotate. Gear 1 drives the idle gear 2, which in turn drives gear 3 and shaft 41 keyed 5 thereto, and the abrasive member 43. The members 20 and 30 by the action of coil spring 40 are retained thereon, and due to the upset portion 37 of member 36, riding in groove 10, the members 20 and 30 are prevented from moving laterally with respect to shaft 7.

The members 20 and 30 will rotate with the shaft '7, but as they are only frictionally mounted thereon, they will (when the blade comes in contact with the abrasive member) cease to rotate and bear firmly against the abrasive member thus sharpening one side of the blade.

By reversing the direction of rotation of handle 9, the shaft '7 will rotate in an opposite direction and carry the blade holders 20 and 30 around to the other side of the abrasive member 43, which in the interval has also changed its direction of rotation, and so will perform an abrading action upon the other side of the razor blade.

I claim:

In a razor blade sharpener, the combination of, a reversible rotatable shaft having an annular groove therein, a razor blade holder frictionally supported on said shaft and rotatable therewith having opposed ears provided with 110 mounted on the ends thereof and positioned within said housing, a connecting gear interposed between said first mentioned gears, and an operating crank handle keyed to said first shaft for rotating the same and through said intermediate gear to drive the abrasive carrying shaft, and a supporting handle fastened to said housing for supporting the razor sharpener.

JOHN BAUMGARTNER.

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