Patent GB-456720-A (GB)
Title: Improvements in sharpening means for safety razors
IPC: B24B3/48
Filed: 1935-03-13
Abstract: 456,720. Sharpening razors. KELSEY, L. A., 11, Horbury Crescent, Notting Hill, London. March 13, 1935, No. 7812. [Class 60] [See also Group XIV] A device for sharpening the blades of safety razors comprises a cylindrical portion 1 with end plates 2 within which is pivoted, on pins 8 supported by spiders 10, a holder 5 carrying a stone 3 and a strop 4, so that either may be brought uppermost to operative position. The blade 51, mounted in a razor or in a holder, is inserted in a carriage movable along a guide channel 12 on the casing 1, the carriage having guide plates 14 riveted to a body 15 in which are members 18 pressed by springs 21 to apply pressure to the blade. The movement of the carriage is greater in extent than the length of the holder 5 and is equal to the full length of the casing for honing, but less to the extent limited by stops 23 for stropping, the stops 23 being carried by members 35 pivoted at 36 to the ends of the casing and moved into and out of position by members 34, when the holder 5 is turned. The holder is turned by a catch 24 provided with a part 28 movable in a slot 25 in the casing, and a part 27, which moves under pressure of a spring 30 into an enlargement 31 to lock the holder 5 ; the catch 24 also moves in a slot 32 in a part 33 of the member 34 so that when it engages the ends of the slot 32, the member 34 is turned. In the casing are mounted lifting levers 37 pivoted at 38 and provided with rollers 42 to engage beneath the razor blade, and with pivots 43 for levers 44 having outwardly projecting rollers 45, which are engaged by projections 22 on the carriage, and with inwardly projecting rollers 46 pressed by springs 47 to engage the levers 37. During honing, the edge of the blade is in a leading position, and at the ends of the strokes of the carriage swings down about pivots 52. On movement of the carriage, first in a rearward direction, the projections 22 snap behind the rollers 45 and the blade assumes a horizontal position ; the carriage is then moved forwards and the levers move about the pivots 38 to lift the blade and then lower its edge onto the stone. During stropping, the stops 23 are in position and the blade swings down, at the ends of its strokes, between the end of the holder 5 and the levers 37, riding back, with its edge trailing over rollers 9 at the ends of the holder. In a modification the stone and the strop are carried by a member slidable endwise into a part hinged at one end in the casing, so that it may be turned to a vertical position for removal and reversal of the stone, &c. ; it is held in working position by a clip. Stops to limit the stroke during stropping are provided, and are made operative by parts on the stone holder, which engage levers actuating the stops. In another modification, the stone holder is pivoted about a longitudinal axis to one side of its centre line, the pivots lying in transverse slots in supports in the casing. The blade may be inserted or removed from the side of the casing ; the parts may be arranged so that the heel of the blade does not touch the sharpening surfaces. A construction of razor is described, comprising a hollow handle 49 having a stirrup 50 for the hollow ground blade 51 pivoted in the stirrup by pins 52. Slidable in the handle is a guide 54 connected by a flexible wire 55 to the end of a guard 56 movable in the slotted end 57 of the handle against the action of a spring 58, the blade being freed by pressing the rear edge of the guard; or the guard may be hinged about the rear portion of the blade.