US2066215A - Safety razor and blade therefor - Google Patents

Description

Dec. 29, 1-936. G. E. MIGNON' 2,066,215,

SAFETY RAZOR AND BLADE THEREFOR Filed Nov. 21, 1935 Patented Dec. 29, 1936 UNITED STATES PATENT OFFIE George Elouis Mignon,

Waverley, near Sydney,

New South Wales, Australia Application November 21, 1935, Serial No. 50,971 In. Australia May 15, 1935 3 Claims.

In one known type of safety razor the headstock is fitted with a slide on which a demountable blade is carried, and this slide with the blade upon it is oscillated by a rotary groove cam which coacts with a stud which is fixed in the slide or the slide is driven by levers which are actuated by the cam. The groove cam is out in a milled faced. roller which is freely rotatable in bearings on the top side of the headstock cap, and rotation is applied to this roller by frictional contact with the face of the user when the razor is manipulated in use in the conventional manner. As the roller is thus rotated the carrier is oscillated, carrying the blade with it so that a positive cutting action on the beard is effected as contradistinguished from a still blade action which ,is depended on in the case of safety razors of the more usual type.

Oscillating blade safety razors of the kind above described are objectionable or faulty in certain respects. The carrier is an additional part in the headstock assembly, and if it be lost or deformed the razor is rendered useless. The carrier movement is also liable to be impeded by soap deposit, and in the setting up of the razor for use two parts-the carrier and the blade must be set up correctly, involving inconvenience and risk of error. Furthermore, cumulative lost motion, firstly between the driver cam and the carrier, and secondly between the carrier and the blade, result in diminishing the blade stroke length, thus affecting the eficiency of the instrument.

The object of the present invention is to provide a safety razor of the oscillating blade and face driving roller type in which the above stated disadvantages are not present.

With that and other objects in View the invention consists in a razor of the kind described wherein the blade is directly driven by the face roller, and is oscillated without a carriage on a runway in the razor headstock, and is guided by studs in the headstock which register with slot guides in the blade ends. The drive is applied to a stud which is fixed permanently on the top side of the blade and projects upwardly through a longitudinal slot in the headstock cap and is engaged by the groove cam in the face roller which is mounted for rotation on the top side of the headstock cap. The blade is flexible, being constructed of flat paper thin steel and the butt end of the driver stud is preferably riveted or welded to the blade, but it may be formed by members struck up from the blade and integral with it.

A razor embodying the inventionz'in the preferred form of construction is illustrated in the accompanying drawing, in which:'-

Fig. 1 is a longitudinal section through the headstock with a blade fitted therein;

Fig. 2 is a corresponding transverse section;

Fig. 3 is aside elevational view of the. headstock cap with the face roller mounted for rotation on it;

Fig. 4 is a perspective view of the top face of the headstock showing the apertures therein in which the handpiece stem spigot and the blade guide dowels are accommodated and the clearances provided for the rivet head of the blade drive pin; and

Fig. 5 is a perspective view of the blade.

The handpiece A is appropriately shaped and finished for holding purposes and is socketed and tapped at its top end at B to receive and engage the screwed stem spigot C which is formed integrally with the headstock cap D. Clearance for the spigot C is provided by the centre slot E in the blade F and by the centre hole G in the headstock H. The headstock cap D is spaced above the headstock floor by downset end members L and it is aligned and centred on the headstock by two integral or inserted dowels N, N which project downwardly from it and enter the fitting apertures O, O in the headstock. The dowels N, N align the headstock cap with the headstock; the slots Q, Q in the ends of the blade straddle the dowels N, N, and thus the blade is aligned in the headstock and its oscillatory movement controlled so that all lateral movement is prevented while full freedom for the desired oscillatory longitudinal movement is preserved. R is the driver stud. As shown, its butt end is riveted in the blade. Its top end projects up through a longitudinal slot S in the headstock cap, and is contained in the joggle cam groove T in the milled surface of face roller U. This roller is set up for rotation in bearings V in the headstock cap, its journals being preferably driven-in pegs X. As shown in Fig. 2 the operative edges of the headstock are downcurved as also are the lateral parts of the headstock cap, providing appropriate clearances above and below the blade edges to ensure satisfactory blade action in use. The apertures Y in the headstock provide clearances under the path of the driver stud, and the top face of the headstock is finished to provide a runway offering minimum friction for the oscillation of the blade upon it. The fitting is arranged so that there is just clearance for the blade between the lips of the headstock cap and the headstock so that it may be oscillated with minimum friction, and the lips are shaped and proportioned so that they form contacts to bear on the skin, leaving the blade edges proud to 6 touch the skin without slitting it. The lips on the'he'adstock cap act as guides for the top side of the blade and prevent rising of the blade above its normal operative plane. v V In order to ensure true linear movement of 10 the blade without frictional retardation by the guide dowels on which the edges of the end slots of the blade bear, the driver must be fixed on a centreline position on the blade.

The operation of the device is apparent from 16 the above description. 7 On applying the razor to the face and moving the same in the desired direction the roller U is rotated, the cam groove T forces the dowel pin R to reciprocate carrying the blade with it; the blade is guided by the slots 20 in the ends thereof and also bythe slot in'the midway portion. No additional parts are needed for guiding the razor or for securing it so that it will always'move in the proper path. What I claim as my invention and desire t 25 secure by Letters'Patent is:

1. A safety razor of the oscillating blade class comprising an assembled headstock, a headstock cap, a detachable handpiece and a face roller rotatably mounted on the headstock can. said face roller having'a cam groove on it adapted to drive a blade through a coacting member on the blade, said razor having a runway on the top side of the headstock and a plurality of depending dowel 6 7 pins on the headstock cap engageable in registering socket holes in the headstock, said runway forming a longitudinally disposed slide bed adapted to carry a fiexible sheet metalblade' directly upon it and having a clearance aperture 10 in it intermediate the handpiece attachment and said dowels, and said dowels adapted to act as 1 guides for maintaining the blade in longitudinal alignment with said slide bed.

2. A flexible sheet metal blade adapted for use with safety razors of the kind referred to in claim 1, said blade having a fixed stud projecting from it at approximately right angles to its face on a centre line position and a longitudinal slot on its center line midway its length. 7

3. A flexible sheet metal blade adapted .for use with safety razors said blade, having a fixed stud projecting from it at approximately right angles V to its face on a centre line position, a longitudinal slot on its center line midway its length and a slotway in each end of it, said slotways adapted to coact as guides with dowels in a holder. c

GEORGE ELOUIS MIGNON;

Images