US1772675A - Shaving apparatus - Google Patents

Description

Patented Aug, 12, 1930 UNITED STATES PAUL MLLER., br SOLINGEN, GERMANY sHAvING APPAATUS Application med'November 10, 1928, Serial No. 318,560, and in Germany July 19, 192.8.

The base of the cutting procedure is rapidity but it is only due to the progress Vin technics in modern times that it has become possible to create this base and to manufacture the protecting comb of the safety razor of light metal and of the necessary thickness, placing the blade of therazor in such a safe manner that even with the quickest movement of shaving the cutting of the skin is avoided. The well known safety razors lare supplied with small ears `which holdthe blades at the exterior edges in a fixed position for use, or which are placed along the side of thev blade between the projections. In practical use it has been found that this construction is faulty las it is impossible to regulate the position of the blade, and also it is'diiicult to extract same from the protecting comb. As guides within the signification of the present invention they are u nsuitable, and all the more so since hollow groundblades, due to the manner of their preparationforging and sharpening by hand`there is always a more or less important difference in mass work. The consequence is that owing to the lack of an exact and precise lay-on surface, the blade when being insertedl into the .protectin comb or when being pressed agalnst the@ s in, shifts slightly and. no longer fulfills the required object. Avery slight alteration of the position of the blade in the protecting comb sufflce's to destroy all protection of the cutting edgeand thus produces severe woundsin the skin when shaving. Moreover the earsat the side of the blade hinder the holding of same at the sides when taking` it .out or putting it into the holder. One is thereby obliged to take hold of the blade at the cutting corner, which, apart from being difficult and y.painful, results in serious Wound -to the fingers.`

lOwin to 4an insufficient grip, the'blade falls out o` the hand very easily, and thus becomes injured. Further, the two corner teeth, upon` which the cutting corners of the blade lie, are also rounded off, similar to the other teeth, and in consequence of this the cutting corners do not -lie flat on the corner teeth, butstand out somewhat. The result of 5 this is that in the shaving of diilicult parts of the face, such as the chin, etc., these corners cut into the skin. In other systems the blade is not adjustable, butis held fixed inthe position for use, the cutting edge of the blade resting upon metal projections. It is quite clear that in such an apparatus the line edge of the blade is easily injured in use and thus is very soon spoiled. Thanks to the Pass casting system it is nowpossible to cast even safety razors of a dicult form out of light metal in a practical manner, and to adapt thereto such appliances that the hllow ground blade lies rigidly 'and free of all vibration, the blade being independentof the differences in exterior measurements and itting exactly within the protecting comb. As is seen inthis invention, the well known 'projections are missing which are usually to be found at the side of the blade. The adjust'- ment of the'blade is now effected by means of two long and wide guiding rails'c, d which are so arranged that they are to be found under`- the blade in two exactly fitting guiding grooves e, f which are milled into the underside of blade a. l j

In this manner, and by means of the four sides of the two rails, four exact and large lay-on surfaces are provided, instead of two small surfaces, such as are generally found s0 in the ordinary `safety razors, whilst at the same time an ,exact adjustment of the blade is assured, the movement of the bladein any direction being avoided. AAs the length of the blade a lies free above-the protecting comb ,85 b, and as it can be readily adjusted in its. breadth'b means vof the long guiding rails o, d, the lade, independent of its size, fits exactly on the protectin comb, even when, r if new or if after having en reground after 9 use, there are more or less unavoidable dif-f` ferences in .the size of the blade. The 1nterior sides of the grooves are not touched in the manufacture of the blade nor in the grinding of same. Thus every blade fits exactly inside the guiding rails, and is,also 1n-` serted into the protecting comb backwards,

thus avoiding a contact ofthe cutting edge as well as all injury to themetal ofthe protecting comb. A sidewaysmovement or an l the amplified back` of the I 'the teet 'ception of the-cutting edge which corner teetlL of the protecting comb, so that irregular insertion of the blade when pushing same into the holderv or when regulating the position of the blade. by means of the screws is thus rendered impossible, the cutting ed e always lying exactly para-llelv with of the protecting comb. Further the hollow ground -blade projects on both sides free o athe protecting comb with exlies on the it may 'easil be held in the fingers onboth sides and p acedwithin orl extracted from the protecting comb without the fin ers coming into contact with the cutting e ge. The two corner teeth of the protecting comb are, contrary to the other teeth, arranged as fiat guides without any rounding off, and .hence the cutting edge of the blade lies fiat thereon, in any position of the blade and even when adjusted. It is impossible for the cutting corners to cut into the skin when shav- `he diagram indicates the description of the object of this invention.

Fig. ,1 shows the insertion of the blade into the protecting comb.

lim

F1g.v2jis a perspective view of the safety lrazor with the gulding rails.

Fig 3 is a vertical longitudinal section.

Fig. 4 shows a back view of the blade with the uiding grooves.`

Vnt I claim is: e 'An improved safety razor comprising, in combination, a handle, a guard comb secured in the center to the handle, an adjustable hol-l low ground one ed e hoe-typed safety razor blade with a wide ack, projecting free with both ends above the'guard comb, a spring clamp fixed to the guard comb for pressing the blade on to the guard comb, two ating screws, the two corner teeth of the guard comb contrary to the other teeth, arranged as fiat uides without any rounding o the gua comb having on its upperside double guiding rails for adjusting the blade, thev blade havin double uidinggrooves milled into the un erside o the amplified back of the `blade and adapted to fit onto the guiding rails of the guar comb providin four lay- -on surfaces for the blades, for e purpose set forth in `the specification.

PAUL MLLER.

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