US2033995A

US2033995A - Safety razor

Info

Publication number: US2033995A
Application number: US6510A
Authority: US
Inventors: Barney R Nyhagen
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-02-14
Filing date: 1935-02-14
Publication date: 1936-03-17
Anticipated expiration: 1953-03-17

Description

March 17, 1936. R NYHAGEN 2,033,995

SAFETY RAZOR Filed Feb. 14, 1935 INVENTOR. .B/IRNE) R IVY/1A GEN ATTORNEYS Patented Mar. 17, 193 6 UNITED STATES PATENT OFFICE 3 Claims.

. the teeth.

More particularly the invention provides a safety razor including a flexible blade and a combined blade holder and. guard member having guard teeth and means for supporting the cutting edge of the blade in overlying spaced relation to the teeth whereby said cutting edge may be flexed towards and away from the teeth by pressure of the blade against the skin.

The invention further resides in the provision of means for supporting the blade for limited relative longitudinal and transverse movements in the plane of the blade and with reference to the blade holder and guard member to permit of the flexing of the blade so that the same has a. limited amount of give during the shaving operation to minimize the possibility of cutting the skin because of the yielding action of the blade.

The invention further embodies blade clamping elements mounted on the blade holder and guard member for longitudinal movement with reference thereto and for engagement with the end edges of the blade for releasably securing the blade on said member.

By virtue of the improved construction of the razor, the shaving may be more uniformly accomplished due to the fact that the cutting edge is sufliciently spaced from the teeth to avoid interference of the teeth with portions of the blade lying directly thereover; the blade may be stropped while supported by the holder; and the blade may be inserted, removed and cleansed, with greater facility.

Other objects of the invention reside in the provision of an improved razor of the character set forth, which is not unduly complicated in its construction or mode of use, which may be economically produced and which is highly eflicient for its purpose.

With the above recited and other objects in view, reference is made to the following specification and accompanying drawing in which there have been disclosed several forms of the invention while the appended claims cover modifications thereof which fall within the scope of the invention.

In the drawing:

Fig. 1 is a side view of a razor constructed in accordance with the invention, partly broken away to disclose the underlying structure.

Fig. 2 is a top plan view thereof.

Fig. 3 is a fragmentary vertical sectional view taken approximately on a plane indicated on the line 3-3 of Fig. 2.

Fig. 4 is a sectional plan view taken approximately on the line 4-4 of Fig. 3 with a part of one of the blade clamping elements broken away.

Fig. 5 is an enlarged fragmentary transverse sectional view taken approximately on the line 10 55 of Fig. 2.

Fig. 6 is a side view illustrating a modified form of the invention.

Fig. 7 is a plan view thereof.

Fig. 8 is an enlarged transverse sectional view taken approximately on the line indicated at 8-8 in Fig. 7.

Fig. 9 is a plan view with the cap piece removed and showing the blade applied and partially broken away. v 20 Referring to the drawing by characters of reference, particularly the form shown in Figs. 1 to 5 inclusive, A designates a blade which is preferably of the double edge flexible type having opposite longitudinal cutting edges I 0 and formed 25 with a longitudinally extending positioning slot ll intermediate its width, and which is notched or recessed at its corners as at l2.

The razor further includes a combined blade support and guard member designated generally 30 by the reference character B, which includes a body section l5 and a cover section It which are permanently secured together by rivets H or equivalent fastening means. The body section I5 is formed at its opposite longitudinal side edges 5 with outwardly extending spaced intermediate guard teeth l8 and and guard teeth l9, the latter having their upper surfaces 20 spaced above the upper surfaces of the intermediate guard teeth to constitute supporting surfaces for the corners of the blade adjacent the cutting edges, the blade being otherwise unsupported throughout the remainder of its entire area.

The cover section It is provided on its undersurface with depending longitudinally extending 45 side flanges 2| an depending transversely disposed end flanges 22, the side faces of which are spaced from the side flanges 2|. The upper surface of the cover section It is provided with a longitudinally extending blade positioning rib 23 intermediate its side edges which edges terminate flush with the bases of the teeth l8 and I9 and which rib is designed to cooperate with'the longitudinal slot II in the blade A for guiding the user in properly positioning the blade on the blade holder and guard member B.

The means for releasably securing the blade in position on the member B consists of a pair of blade clamping elements, designated generally by the reference character 25, which are carried by the member B for longitudinal movement with reference thereto. The elements 25 are each located between the body and cover sections l5 and I5 and guided by the longitudinal flanges 2| and are formed with outwardly directed transversely spaced terminals 21 having inwardly directed hooked extremities 28 which are designed, when the elements 25 are retracted, to overlie the end edges of the notched or recessed portions l2 of the blade A. The blade clamping elements 25 are designed in their extended position to release the blade so that it may be readily removed by either inverting and dropping; the same from the member B or by grasping the end edges of the blade at the portions lyin between the hooked extremities 28. In order to facilitate the grasping of the end edges of the blade, the sections 15 and iii of the member B are formed with flnger receiving concavities 29.

The member B has rigidly and permanently secured to the central portion thereof, a depending tubular handle 30 and the central portion of the body section l5 of the member B is formed with a circular recess 3| concentric to the axis of the handle and opening through the upper surface of the body section. A rotatable shaft 32 extends through the handle and has fixedly secured to its upper end a cam disk 33 which is located in the circular recess 3|. The lower end of the shaft 32 protrudes beyond the lower end of the handle 30 and has rigidly secured thereto a knob 34 by means of which the shaft 32 may be turned in the handle. In order to tension the shaft and knob against unintentional turning movement, a spring washer or equivalent friction device 35 is provided which surrounds the shaft at its juncture with the knob 34, said spring washer being located in a recess 35 at the lower end of the handle. The shaft 32, cam disk 33 and knob 34 are rigidly assembled as a unit so that turning movement of the knob in opposite directions will effect corresponding turning movement of the cam disk 33. The cam disk is limited to approximately a quarter of a turn by a stop pin 31 with which stop shoulders 38 and 38 coact, said shoulders being formed by cutting out the periphery of the cam. disk 33.

In order to impart sliding motion to the blade clamping elements 25, upon turning of the cam disk 33, the cam disk is formed with a pair of cam slots 40 which engage with depending cam pins 4| of the elements 25, it being apparent that clockwise turning movement of the cam disk 33 from the position of the parts shown in Fig. 4, will effect .an outward shifting movement of the elements 25 to eifect a release of the hooked extremities 28 from their overlying relation to the end edges of the blade.

In the form of the invention shown in Figs. 6, 7, 8'and 9, the combined blade holder and guard member, designated generally by the reference character C, is provided with outwardly projecting intermediate guard teeth and end guard teeth 46, the latter having upper surfaces 41 elevated above the upper surfaces of the intermediate guard teeth 45 so as to support the cutting edges Q8 of the blade D in overlying spaced relation to the intermediate guard teeth. The end teeth 46 are further provided with end poraoaaeos tending longitudinally between the central aperture 50 and the apertures 5|. The razor in this form also includes a cap piece 53 for retaining the blade in position on the member C and said cap piece is in the form of an elongated bar having transversely extending terminals 54 which overlie the longitudinal center of the blade D and the opposite ends thereof. The cap piece 53 is provided with a central depending threaded stud 55 which is designed to extend through a central opening 56 in the blade and the central aperture 50 in the member 0 and to protrude below said member for threaded engagement in the socket 51 in a handle 58. The cap piece 53 is also provided with longitudinally spaced depending studs 59 adapted to extend through corresponding apertures 50 in the blade and the apertures 5| in the member 0. The blade D is provided with a slot 6| to receive the rib 52 upon which the cap piece 53 rests at its medial longitudinal portion, while the transversely extending terminals 54 thereof are supported by the elevated surfaces of the end portions 49 of the end teeth 46.

Under this construction and arrangement, as well as in the preceding form of the invention. the blade is loosely mounted so that it has a slight play in its own plane both longitudinally and transversely so as to permit of free flexing of the cutting edges of the blade.

What is claimed is:

1. In a safety razor, a blade holder having guard teeth at the longitudinal side edges thereof, the endmost teeth being spaced above the remaining intermediate teeth and adapted to support the blade with the cutting edges in spaced relation to and spaced above the intermediate teeth and transversely spaced pairs of longitudinally shiftable hooks engageable around the opposite ends of the blade for releasably holding the same on the holder against accidental displacement while permitting of limited longitudinal and lateral movements in the plane of the blade and flexing of the cutting edges by contact with and pressure against the skin.

2. In a safety razor, a blade holder having guard teeth at a longitudinal side edge thereof, the endmost guard teeth having their upper surfaces elevated above the upper surfaces of the remaining intermediate teeth and adapted to support the blade with the cutting edge in spaced relation to and above said intermediate teeth, and having raised portions on said elevated surfaces of the end teeth, and means overlying the ends of the blade and seated upon said raised portions for releasably holding the blade on the holder against accidental displacement while permitting of limited longitudinal and lateral movements of the blade in its own plane and flexing of the cutting edge by contact with and pressure against the skin.

3. In a safety razor, a blade holder having guard teeth at a longitudinal side edge thereof, the endmost guard teeth having their upper surfaces elevated above the upper surfaces of the remaining intermediate teeth and adapted to supblade so as to permit of limited longitudinal and lateral movements of the blade in its own plane and flexing of the cutting edge thereof by contact with and pressure against the skin.

BARNEY R. NYHAGEN.