Patented Nov.9, 1937
United States Patent Office
Safety Razor With Resilient Detachable Support
Fritz Ebert and Erich Ebert, Köln-Vingst,
Application August 17, 1936, Serial No. 96,450
In Germany March 13, 1935
6 Claims. (Cl. 30—66)
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, disassemble and clean. Other known safety razors have holders which are movable relatively to the guard plate and depend to a great extend 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 disassembled 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 proper position for use, merely by a relative displacing of the support and plate and afford the appreciable 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 by way of example 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 safety razor but with the omission of the blade from between the plates.
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 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.
The resilient support 8 has a concaved upper arm 8a designed to bear against the guard plate. The arm 8a may be 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, for example, a 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.
The longitudinal edges of the guard plate 4 are provided in known manner with teeth or projections 4d and have recesses or gaps 4c for the passage of the lather into the space between the ribs 7, 7a of the guard plate 4 and the cover plate 1.
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.
1. A safety razor, comprising in combination a cover plate provided with a centre pin and two side pins on its under side, a guard plate having apertures registering with and adapted to accommodate said pins, a razor blade with three holes adapted to be clamped between said plates, a neck formed on said centre pin, a flange formed on the end of said neck, a resilient support, a concave top arm of said support adapted to bear at its two ends against the under side of said guard plate and having a slot adapted to accommodate said centre pin, the flange at the end of said centre pin bearing against the side of said resilient arm, and a handle carrying said support and adapted to shift the same relatively to said plates to clamp said blade therebetween.
2. A safety razor as specified in claim 1, in which the handle, the cover plate, the guard plate with the exception of the centre pin are made of a non-metallic, plastic thermo-setting material, such as artificial resin.
3. A safety razor as specified in claim 1, in which the support consists of a metal strip, and the upper arm of said support is bent in chair- or saddle-shape and in which the slot in this concave upper arm merges into a circular hole at its lower end of a diameter adapted to allow the passage of the flange or the centre pin and terminates at its upper end approximately in the axis of the handle.
4. A safety razor as specified in claim 1, in which the centre pin has a neck of a diameter slightly smaller than the width of the slot in the resilient arm of the support and carries on its lower end the flange of the same diameter as the pin proper.
5. A safety razor as specified in claim 1, in which the guard plate has in its under side a U-shaped channel slightly wider than the concave resilient arm of the support and adapted to guide said support.
6. A safety razor as specified in claim 1, in which the resilient support is detachably connected with the handle.