Patent GB-724485-A (GB)
Title: Honing and/or stropping apparatus for razor blades
IPC: B24D15/08
Filed: 1953-05-19
Abstract: 724,485. Honing and/or stropping razor blades. CINIGLIO, 1. May 19, 1953 [Aug. 26, 1952], No, 14082/53. Class 60. Honing and/or stropping apparatus for razor blades comprises a casing 10, a slide 11 shiftable on a slide track 22 in the casing 10, a razor blade holder 12 adapted to be inserted into the slide 11, an end plate 13 pivoted at one end of the casing 10, and a honing and/or stropping element 14 mounted on the bottom of the casing 10. The casing 10 consists of a single piece of sheet metal and has a base plate 16, slide tracks 22 extending longitudinally on both sides of the base plate 16, and two lateral walls 17 with inwardly turned flanges 18 and ledges 65, 66. The honing and/or stropping element 14 is mounted on the base plate 16 substantially in the middle of its length in an oblique direction and has a triangular cross section with clipped corners, each lace Having a different honing or stropping characteristic;. the element can be turned about its axis so as to bring the face with the desired characteristic into operative position. The end plate 13 can be swung about its pivot from a closed position into an open position in which the slide 11 can be partly pulled out of the casing 10, and a blade B inserted in or removed from the blade holder 12. The slide 11 comprises a transverse portion 30 and side plates 31 having runners 32 which slide on the tracks 22, the runners having concave recesses 45. A lever 35 is pivoted, by pin 36, on the outside of each side plate 31, the forward end of each lever having a recess 36a to receive the blade holder 12. The rear end of each lever 35 has a notch 37 receiving one end 38 of a spring 39 coiled intermediate its ends about a pin 40 arranged on the bridge piece 41 of the transverse portion 30 of the slide 11. The front ends of the levers 35 are thus urged upwardly, the movement being limited by downward projections 44 at the rear ends of the levers 35. The bridge piece 41 serves as a grip for the thumb and fingers of the operator who can thus move the slide 11 to-andfro along the casing 10. Each end of the blade holder 12 has a trunnion 53 to engage the recess 36a in the lever 35; each trunnion carries a disc 54 having two parallel flats 55 at right angles to the blade B in the holder 12 and also carries a double-armed lever 56, the middle portion of each lever 56 being joggled inwards at 57, the intermediate portions having concave guide faces 58, 39 and the ends 60 being pointed. The discs 54 roll along the lower faces of the inwardly overhanging flanges 18 of the casing, while the levers 56 co-operate with cam shaped portions 67 at the front ends of the ledges 65, 66 on the inside of the side walls 17 of the casing and with cam shaped depressions 68 at the rear ends of the flanges 18. The spring 39 acting on the rear ends of the levers 35 presses the discs 54 upwardly against the flanges 18 and the tendency of the discs to rotate during reciprocation of the slide 11 presses the blade edge against the element 14. To adjust the pressure of the blade on the element 14 to suit blades of various thicknesses, the stressing of the spring 39 is adjustable. The spring 39 is bent in its middle into a loop 109 fitted around a pin 40 positioned eccentrically on a disc 111 having serrations 110 engaging serrations in the rear face of the bridge piece 41, the disc being rotatable in the slide 11 and secured by a circular clip 117 engaging a V-groove. By rotating'the disc 111 e.g. to one of three positions, the stressing of the spring is adjusted.to the desired value. The back of the disc 111 may have a slot 114 to receive a coin or screw driver.