US1250398A - Safety-razor. - Google Patents

Description

L. F. WARREN.

SAFETY RAZOR. APPLICATION FILED NOV-11.1915.

1,250,398. Patented Dec. 18, 1917.

W By WHO/ME) UNITED STATES PATENT OFFICE.

LUKE FRANCIS WARREN, OF NEW YORK, N. Y., ASSIG-IN'OR TO THE DARRENT COMPANY, INCL, A CORPORATION OF NEW YORK.

SAFETY-RAZOR.

Specification of Letters Patent.

Patented Dec. 18, 1917.

Application filed November 11, 1915. Serial No. 60,842.

To all whom it may concern:

Be it known that I, LUKE FRANCIS W m- BEN, a citizen of the United States," residing in the city, county, and State of New York, have invented certain new and useful Improvements in Safety-Razors, of which the following is a specification.

This invention aims to provide a certain improved style of safety razor in whlch the blade is given a reciprocating or similar motion while it is being drawn over the face of the user. Such a motion causes the razor to cut more easily and without pulling the hair and is secured according to my invention by mechanism of the simplest sort which is easily accessible for cleaning and which can be worked without special elfort by the operator in the act of drawing the razor over his face.

The accompanying drawings illustrate an embodiment of the mvention.

Figure 1 is a side elevation and Fig. 2 a rear elevation of the assembled razor;

Fig. 3 is a transverse section through the head of the same;

Fig. 4 is a plan, partly broken away, showing the head of the razor and the parts mounted thereon, being taken on the line 4-4: of Fig. 1;

Fig. 5 is a section on the line 55 of Fig. 1 (Fig. 3 is shown on a scale larger than the other figures).

Referring to the embodiment of the invention illustrated the razor blade A is mounted on a back B with its edge overlying a guard C of any usual or suitable design. The back is provided with undercut end lugs D which fit into similarly shaped notches in the end of the blade. The blade is fastened on the back by means of a clamping member E having beveled ends which are forced under the undercut edges of the lugs D and thus pressed down on the blade; the clamping member E being forced inward from the rear until the ears F thereof are stopped by striking the lugs D. The means thus described for mounting and fastening the blade on the back are not claimed as a part of the present invention, being covered in a co-pending application which I have filed. Various other styles of back and clamping means and blade may be used Without departing from the present invention.

The back B is movably mounted on the head G of the razor which is fastened on the upper end of the handle H at a suitable angle for convenient shaving. The head G is approximately U-shaped in transverse section. The back B rests on the top or front face thereof and has an undercut or dovetailed lower portion which is guided longitudmally in undercut grooves J of the head, so that the back, with the razor clamped thereon may be reciprocated across the direction of shaving.

Reciprocation is effected by means of an eccentric pin K working in a transverse slot L in the back and mounted on a disk M which is rotatably carried in suitable bearings in the head and is rotated by means of a pinion N driven by an actuating rack which is transversely reciprocable in the head G. The length of the rack and the diameter of the pinion are such that for one complete stroke of the rack there is somewhat more than a complete rotation of the pinion and, therefore, more than a complete reciprocatin movement of the back and the blade carrie thereby. That is to say, the

pinion and the crank pin transmit the mo tion of the actuating member 0 to the blade at an increased rate of reciprocation. The rack O is connected to an operating arm by means of a pin or screw P passing through a slot Q, in the back of thehead G. The operating arm is a long spring R extending from its connection with the rack to the lower end of the handle H and forming practically a part thereof. The handle is provided with an offset portion S over which the operator can hook his first finger to get a better grip, while bearing with his thumb against the outside of the spring arm R, the latter being shaped with a broadened portion T at a point where the operator can of the stroke and letting the arm R out again. Thus there is caused by a natural and easy movement synchronous with the regular drawing movement, a reciprocation of the actuating rack O whlch in turn causes" a similar motion at an increased rate of speed of the blade. I

I have found in practice that with such a reciprocation of the blade there is greater danger of cutting ones self I than where there is no such reciprocation; the skin which maybe tough enough to resist a direct pull of the edge of theblade against it cannot resist a saw-like motion of this sort. With safety razors having stationary blades there is, therefore, little danger of ones cutting oneself and one may prem the blade against the face with considerable pressure,-an expedient which is often resorted-to, in order to shave more closely than otherwise. Also to secure a closer or rougher shave the blade has been made in such razors adjustable toward and from the guard, and a considerable space can be left without danger of cutting ones skin But with the razor of the present invention the blade cuts with extreme ease and it is of the greatest importance that it be not permitted to press into the skin; otherwise a cut face will result. I have pro- .vided against this dificulty by making the guard C adjustable in relationto the edge of the blade so that the guard can be set in such a position as to hold the edge from pressing into the skin. The prongs of the waste guard are mounted on a extend through the 7 head G and are fastened at their rear ends to a yoke W which is carried between collars on a screw X which screws into the back of the head and is provided at its outer end with a double milled head Y. By turning the screw X in one Way or the otherthe guard can be set exactly to the desired relation with the edge of the blade.

What I .claim is- A safety razor having a head on the upper end thereof, a substantially U shaped handle H comprising a rigid side connected to the head, an actuating rack O mounted in said head, the flexible side of said handle being connected thereto, a disk M, a pinion N mounted thereon rotatable by the reciprocating movement of the rack, a blade A movably carried by the head and an eccentric pin K for transmitting the movement of the disk to the blade.

In witness whereof, I have hereunto signed my name.

L FRANCIS WARREN.

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