US2129022A - Double edged safety razor - Google Patents

Description

Sept. 6, 193. w. OSBERGHAUS DOUBLE EDGE SAFETY RAZOR Filed Aug. 28, 1934 Patented Sept. 6, 1938 UNITED STATES PATENT OFFlCF Application August 28, 1934, Serial No. 741,835 In Germany April 6, 1933 1 Claim.

This invention relates to a safety razor with a blade clamped, between a guard and a cap, and its object is to provide a razor whose blade is presented to the skin in the most favorable posi-.

tion.

To this end the cap is made with wedge-shaped sides, the ridge of each wedge being defined by a line extending from the top at one end of the cap to its base at the other end, and the upper ends of the two wedges i. e. their intersections with the fiat top of the cap being defined by a pair of parallel lines extending from opposite ends of the top of the cap at an angle to its sides.

It is known that the blade will out .better if it is guided over the surfaces to be shaved in a position inclined at an angle to the direction of cut, as in this instance the edge of the blade exerts a drawing out.

By the wedge-shaped edges 01' the cap the user is compelled to hold and guide the razor in the correct position. The user is accustomed to hold the razor, when in use, so that he can feel the longitudinal edges of guard and cap bearing against his skin, the corresponding cutting edge coming thereby into a definite position which is parallel to the bearing lines of the guard and cap in the known razors. However, the bearing lines of guard plate and cap, 1. e. the intersection so of the corresponding wedge with the top of the cap, according to the invention are not parallel but at an angle to each other so that, when the user has brought the razor into contact with his skin in the usual way, the blade edge is inclined at an angle in the space between the two bearing lines and, when the razor is pulled over the skin in the usual manner, it operates with the desired drawing out.

An embodiment of the invention is illustrated by way of example in the accompanying drawing in which:-

Fig. l. is an end elevation,

Fig. 2 is a side elevation, and Fig. 3 is a" plan view of the razor.

Figs. 4 and 5 are sections on the lines 4-4 and 5-5 respectively in- Fig. 2, viewed as indicated by the arrows.

and

Fig. 'l is a perspective illustration of the guard.

Fig. 8 is a diagram showing the position of a cutting edge with respect to the direction in which the razoris moved over the skin.

Figs. 9 and 10 are diagrams showing respec- 55 tively the parallel position of the bearing lines of the guard, the cap and the corresponding cut- Fig. 6' is a perspective illustration of the cap,

ting edge, in the known razors, and by .way of comparison, the angular position of the bearing line on the cap. I a

The guard of the razor is designated by a, the blade by b and the cap by c.

The guard a is slightly twisted, i. e. the ends of its teeth on both sides are arranged on lines which are at an angle to each other, as best seen in Fig. 1. e

The cap e is equipped with the usual central l0 threaded stem c at its centre; and the usual pins I to enter openings in the blade b and the guard a. g is the usual handle which is placed on the stem '0.

Referring now to Fig. 2, the side of the cap e 15 which is visible in this figure i. e. the side at the right in Fig. 1, is wedge-shaped. The line I----) which extends from the top of the side at one end to its base at the other end, is the ridge of the wedge and, at the same, the hypothenuses- 20 of two triangular surfaces. The triangle {-4,

, .f-f', f'--! is vertical-and the triangle ff, f-f".

f"-f is inclined. The opposite side, with the hypothenuses hh, is quite similar and need not be described, the only distinction being that its 25 wedge is symmetrical to the wedge with the ridge ff, so that the upper ends of the two wedges,

i. e. their intersections with the fiat top of the cap e, are the two parallel lines f-f" and h-h", Fig. 3, which extend from opposite ends of the 30 caps top at an angle to its sides, i. e. to the vertical projections of the lines f-f and h-h on the base of the cap.

When bringing the razor into position'for use, the user causes the cap c to bear against the skin with one of its bearing lines or intersections f--,f" or as shown in Fig. 4 where the dotted lines s indicate the skin, and he then turns the razor about this bearing line until he can feel the guard a touching his skin, where- 40 upon he pulls the razor over the skin, as indicated by the arrows in Figs. 8 and 10. The active cutting edge of blade b on account of its angular position to the bearing line 1-4" or 11-h", performs a drawing cut.

I claim:--- V A safety razor comprising a cap, a guard, and means for clamping a blade between the cap and the guard, the cap having wedge-shaped sides, the ridge of each wedge being defined by a. line extending. from the top at one end of the cap to its base at the other end, and the upper ends of the two wedges being defined by a pair 01' parallel lines extending from opposite ends of the top of the cap at an angle to its sides.

WALTER OSBERGHAUS.

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