Application Date : Aug. 6, 1936. No, 21664/36.
Complete Specification Accepted : Feb. 18, 1937.
Safety Razor with Resilient Detachable Support
We, Fritz Ebert, Erich Ebert and Josef Morschbach, all three of German Nationality, the first two of No. 9, Amtsstrasse, Köln-Vingst, Germany, the third of No. 49/51, Gereonstrasse, Köln, Germany, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:—
This invention relates to that class of safety razors which comprise a thin blade clamped between two plates, namely a lower guard plate and an upper cover plate, the cover plate being connected with the guard plate by a detachable resilient locking support.
The known connections of this type have springs which either vibrate so strongly that they affect the sure guiding and bearing of the cutting edges of the blade against the skin, or they are separate from the handle so that the razor is difficult to assemble, dissemble and clean. Other known safety razors have holders which are movable relatively to the guard plate and depend to a great extent upon the guide being absolutely clean and free from lather and hairs.
The safety razor according to the invention is not open to these objections. The resilient support usually forms with the handle a united whole, capable of being dissembled in exceptional cases, and adapted to carry the cover plate and guard plates so that they are easily removable by means of pins and pin holes. The bearing or saddle-shaped concave part of this support also constitutes the resilient means which in cooperation with a pin provided on the cover plate enable these parts to be reliably held in the proper position for use, merely by a relative displacing of the support and plate and afford the appreciably resilient changing of the blade which is of great importance for shaving.
A form of construction of the safety razor according to the invention in which the handle is set at an incline to the blade-holding plates in known manner, is illustrated in the accompanying drawing in which:—
Fig. 1 shows the head end of the safety razor in a part longitudinal section.
Fig. 2 is a perspective view of the resilient support on the top end of the handle.
Fig. 3 shows the guard plate in end view.
Fig. 4 is a front elevation of Fig. 3.
Fig. 5 is a perspective view of the plate system comprising a guard plate and a cover plate between which plates the razor blade is clamped, the cover plate being shown removed from the guard plate.
The cover plate 1, which is of known curved cross-sectional shape has, as usual, on its under side three spaced pins 2, 3 and 3a. The middle pin 2 is slightly longer than the side pins 3 and 3a and has a thin neck 2a with a flange 2b formed on its end and of the same diameter as the body of the pin 2.
The guard plate 4 has a hole 5 of the same diameter as the pin, 2, 2a, 2b and two recesses 5a, 5b corresponding with the pins 3, 3a. The guard plate 4 in the construction generally employed in practice has on its surface adjacent the razor blade 6 a plurality, in the present instance four ribs 7, 7a and in its under surface a flat bottomed recess 4a rounded at its ends, and slightly wider than the width of the resilient support 8 hereinafter described.
For the sake of simplicity it has been assumed in the longitudinal section shown in Fig. 1 that the convex curvature of the surface of the guard plate 4 corresponding to the concave construction of the inner surface of the cover plate 1 is not formed by the individual ribs 7, 7a illustrated in Figs. 3 to 5, but the whole of the guard plate 4 adjacent the concave inner surface of the cover plate 1 is convex which is evidently also possible but not advisable for reason of saving material.
The resilient support 8 has a concaved upper arm 8a designed to bear against the guard plate. The arm 8a maybe made symmetrical to the other arms of the support but in the example illustrated it is non-symmetrical because the support, as shown in Figs. 1 and 2, has to support a plate system which is intended to assume an inclined position relatively to the axis of the handle. As shown in Fig. 2, the support 8—8a, which is formed from a bent metal, is of chair or saddle-shaped cross section.
The upper arm 8a of the resilient support has a guide slot 8c, the lower end of which merges into a, for example, circular widening 8b in the horizontal arm of the support, whereas its upper end terminates approximately in the axis of the handle 9 which is detachably connected to the horizontal arm of the support by a screw 10 or the like but normally remains connected therewith.
For ensuring the desired position for use of the razor, the pin 2 of cover plate 1 together with the blade 6 lying between the under surface of the cover plate 1 and the upper surface of the guard plate 4 is held between thumb and index finger, its flange 2b being thus inserted into the widening 8b, whereupon the neck 2a is slipped in the end of slot 8c. The concave arm 8a of the resilient support engages in the recess 4a in the guard plate 4 and its ends press against the bottom thereof, whereas its middle portion presses against the upper side of the flange 2b, thereby pulling the cover plate 1 downwards towards the guard plate 4 and clamping the blade 6 tightly between the two plates. The rib-like edge portions of the plate 4 guide the edges of arm 8a of the resilient support and bring the plates into the proper position.
Owing to the pin 2 with neck 2a and flange 2b engaging in the long slot 8c, the parts 1, 4 and 6 are held together and the safety razor is easy to manipulate and can be rapidly fitted together and mounted on and removed from the resilient support. Moreover any slight differences in the lengths of the pin 2, 2a and irregularities in the thickness of the guard plate 4 are compensated by the pressure exerted by the resilient arm 8a of the support. The arm 8a and the slot 8c may evidently be so dimensioned that the slot can accommodate several of the pins, for example all three pins 2, 3 and 3a instead of only the pin 2, for which purpose the pins 3, 3a would evidently have to be constructed like the pin 2. If the curved supporting surface for the blade 6 between the two plates 1 and 4 is formed by the ribs 7, 7a illustrated in Figs. 3 to 5 instead of by a solid convex curvature of the guard plate 4, the two outer ribs are provided with longitudinal grooves 5a, 5b if they should be in the way of the guide pins 3, 3a of the cover plate 1 during the fitting together of the plate system.
The parts 1, 4 and 9 in the form of construction described and illustrated can be made of artificial resin or the like by moulding and pressing, so that they are very light and cheap to manufacture. Only the parts 2a, 2b, 8 and 10 are preferably made of metal.
Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is:—
1.—Safety razor consisting of two clamping surfaces, i.e. a guard plate and a cover plate, holding between them the razor blade, and secured by suitable pins against local displacement, said plates designed to be brought into or out of engagement with a resilient support, characterized in that the resilient support (8) has a top arm (8a) which is bed-shaped, i.e. concave and consists of resilient sheet metal, the supporting surface, which is carried by a handle (9) having a longitudinal slot (8b, 8c) designed to receive a pin (2, 2a, 2b) with flange (2b) extending from the cover plate (1), said flange acting against the pressure exerted by the supporting arm owing to its resiliency upon the lower surface (4a) of the guard plate (4).
2.—Safety razor as claimed in Claim 1, characterized in that the cover plate (1) and guard plate (4) as well as the handle (9) their coupling elements excepted (2a, 2b, 10) consist of non-metallic substances adapted to be shaped or pressed for instance of artificial resin.
3.—Safety razor as claimed in Claims 1 and 2, characterized in that the top arm (8a) of the resilient support (8) is of angular, chair- or saddle-like cross section and that this arm (8a) has a slot (8b, 8c) the lower end of which forms a widening (8b), for instance of circular shape, the upper end of said slot terminating above the middle of the bearing surface.
4.—Safety razor as claimed in Claims 1—3, characterized in that the coupling pin (2) of the cover plate (1) has a thin neck (2a) and an abutment formed by a head (2b) on the end of the neck and of the same diameter as the thick part of this pin.
5.—Safety razor as claimed in Claims 1—4 characterized in that the means for guiding the plates (1, 4) holding between them the razor blade (6) consist of a flat bottomed recess (4a) of U-shaped cross section in the under surface of the guard plate (4), the distance between the edges of the recess (4a) being slightly greater than the width of the arm (8a) of the resilient support (8).
6.—Safety razor as claimed in Claims 1—5, characterized in that the resilient support is connected with the handle (9) by easily detachable but normally permanently effective means (10) to form a constructive unit.
Dated this 5th day of August, 1936.
LESLIE N. COX,
408—9, Bank Chambers,
29, Southampton Buildings;
Agent for Applicant.