Patent GB-184515-A (GB)
Title: Improvements in or relating to devices for sharpening safety razor blades
IPC: B24D15/08
Filed: 1921-02-23
Abstract: 184,515. Salerni, P. M. Feb. 23, 1921. Stropping-apparatus; hones.-comprises detail improvements in a safety-razor sharpening- device having a reciprocable blade-holder which is automatically reversed at the end of each stroke, and having a strop on one side of the axis of the holder and a hone on the other side as described in Specification 108,531. The body 1 of the device is made in the form of two stampings secured together by a liner 45 and by soldering &c., and has flanges 42 which engage the flanged edges of the bases 5 carrying the whetting-materials 4, the edges having a gradually increasing hollow therein so that the bases snap into position. The bases have, at the end which is inserted first, teats of different widths which engage corresponding apertures 40, 41 in the body whereby the bases cannot be inserted in the incorrect position: when in position, the bases rest on flanges 47 and in recesses 35. The reciprocable blade-carrier 10 carries a handle 9 having forked ends 11 which move in paths near the longitudinal edges of the base; thus the finger tips of the hand that holds the body, if in a position to obstruct the reversal of the blade, also obstruct the movement of the handle. The ends 11 of the handle have holes therein to receive the carrier 10, and in communication with the holes are slots 12 of a width less than the diameter of the holes. Notches 13 are formed on the carrier, so that by springing the ends 11 of the handle inwardly, the handle may be removed from, or replaced on, the carrier. The'blade 20 with which the device is intended for use, has in the back thereof a hole 26, and communicating therewith is a slot 28 formed in the side of the blade. The blade is held on the carrier by means of a pin 23 on a member 24, Fig. 8, embracing a reduced part of the carrier, the pin entering the hole in the blade and a projection 27 on the pin entering the slot; a spring member 29 provides frictional resistance to the rotation of the blade on the pin. The pin passes through a thin metal member 21 which fits around the carrier and forms a friction device whereby the carrier is allowed to rotate after the blade has made contact with the strop or with the hone. The carrier is maintained at right-angles to the length of the body and is rotated during its movement along the body by means of pinions 18 on the carrier which engage racks 17 formed in the body; the extent of movement is limited by stops 33. The pinions are maintained in engagement with the racks by two annular members 30 which are mounted on the carrier and have sliding, or partly rolling, fit between parts 31 of the body. When not in use, the handle 9 may be folded into the body at one end only thereof, the disposition of the racks being such that the handle when folded down lies away from the blade. To steady the carrier during insertion and removal of a blade, the handle has short pins 22 at its end which may engage holes in the body. A razor may be stored within the body. The Provisional Specification describes also an arm or arms adapted to rotate around the carrier to lessen the impact of the blade on the sharpening-material.