Patent GB-424740-A (GB)
Title: Improvements in and relating to safety razor blades and holders therefor
IPC: B26B21/18
Filed: 1933-05-31
Abstract: 424,740. Safety razors. DUDEW, C. D., 6, Luben Karaveloff Street, Sofia. May 31, 1933, No. 15456/32. [Class 30] A safety razor has a blade 6, with one or more openended slots 14 and a locating- aperture 18, so that the blade can be inserted endwise between only partly-separated clamping- and guard-plates 1, 3. One of these latter carries locating-pins 4, 5, or end-projections, one, 4, of which is longer than the other, 5, so as to maintain the plates aligned, although sufficiently separated to permit passage of the blank end of the blade under the shorter pin 5. The open-ended slot 14 has a narrow continuation 44, which engages an additional locating- projection 31 on the guard, and may, as shown in Fig. 11, break into the aperture 18<x>, for the short pin 5. The guard carries additional larger locating-pins 30 and the clamping-plate may have corner-projections 15 engaging notches or apertures 22a, Fig. 11, in the blade. The parallel edges of the blade-slot 14, which may have cut-outs 42, may deviate from a straight line, and the other blade-apertures may be so shaped as to permit a transverse adjustment of the blade-edges relative to the guard. The pins 4, 5 may be replaced by or used in conjunction with end-noses 4<a>, 5<a>, Fig. 7, bent from a sheet-metal plate 35 slotted and apertured to fit over a rib or the pins on the clamping plate. The pins, which may be in the form of removable screws, may be round, oval, square, rectangular, inclined, or conical, and the locking pin 5 may have single or double projecting wings engaging a suitably-shaped aperture 18 in the blade. As shown in Fig. 9 the guard is provided with spring-projections 32, 33 which centre the blade and are bent up from a resilient round piece of wire arranged beneath it. The blade may have further apertures 39, Fig. 11, to increase its flexibility and may be spaced from the guard by a slotted detachable shim, Fig. 10<a>, (not shown), of similar form to, but narrower than the blade. To indicate prior use of the blade and so prevent resale of sharpened blades, one of the apertures may be provided with a looped cord or wire having a seal 25, Fig. 5, which must be removed before use, or any of the locating apertures or the slot 14 may be temporarily masked by a breaking-bridge or bridges which is or are broken when clamping the blade. The blade may or may not be designed to fit the standard holder, and the improved holder may be designed to reject standard blades. The guard 3, which may carry a lather-receiving trough 8, Fig. 2, may have both rows of teeth upright, as described in Specification 358,511, both level, or one upright and one level. The ends of the blade-clamping plates and the blade are cut away inwardly to facilitate gripping the blade between the fingers and one end of the clamping-plates may be cut away more deeply than the other to indicate that it is the correct entry end for the blade. To dry the razor and blade, a slotted cloth wiper 20, Fig. 10; (not shown), of similar form to the blade, is passed between the clamping-plates above and below the blade. Specification 424,804 also is referred to.