US1598189A

US1598189A - Safety razor

Info

Publication number: US1598189A
Application number: US22674A
Authority: US
Inventors: Addison Raymond Mcdonald
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-04-13
Filing date: 1925-04-13
Publication date: 1926-08-31
Anticipated expiration: 1943-08-31

Description

Patented Aug. 3l, 1926. i y l UNITED STATES marsa ENT oFFl-cE.A4

PAT

RAYMOND MCDONALD ADDISON, SAN FRANCISCO, CALIFORNIA.

y SAFETY nazca.

Application led 13, 1925. Serial No. 22,674.

This invention relates to safety razors, and particularly to an armpit safety razor.

v As is well known, the ordinary safety razor` has ,a straight cutting' edge, which is of course the proper contour forordinary shaving purposes. Suoh'razor, however, isy not well adapted for use in shaving armpits, and when so used the end portions only -of the blade usually perform the cutting operations. The shaving with such razors is therefore not only very crudely and roughly performed, but the sharp end corners of the blade cut into the flesh vand cause bleeding and serious wounds.

. object of my invention.

` view showing the re With this yand other objects in view, asV will hereinafter appear, my invention consists of a safety razor having the features of construction and operation set forth in the following specification and illustrated in the"'accompanying drawing. In such drawing, annexed hereto and forming a part of this specification, I have shown one specific embodiment of my invention, but it will be understood that the invention can be otherwiseembodied, and that the drawing isl not to be construed ,as defining or limiting the scope of the invention, the claims .appended to this specification being relied Yupon for that purpose.

`Referring to the figures 0f the drawing Fig. lis a longitudinal sectional view through my improved razor;

Fig. 2 is a top end view thereof;

Fig. 3 is a top end view of the inner guard member;

Fig. 4 isa side elevation of the razor elements in /spread-out relation;

Fig. 5 is an enlar ed fragmentary detail atio'n of the blade and razor;

Fig. 6 is a plan view cfa blade for use with the razor;

Fig? 7 is an edge view thereof.

Referring morespecifically to the drawing by reference characters, 1 indicates the inner guard or head member having a handle portion 2 projecting therefrom. A co- -sides of the razor.

opera ;i ngl.outer member is indicated at 3,l and is provided with a shank 4 adapted tov extend through a bore in the handle portion 2. A handle 5 hasa bore 6 in the inner"6.0

end thereof, threaded to co threaded end 7 of the shank 4.

`The two opposite edges 8 of the inner member 1 are convexly curved as shown in operate` with the Figs. 2 and 3, and the outer blade-receivin 66 surface 9 thereof is curved transversely an convexly across the member toward and from thev said opposite edges. The edges -are also slotted atl() to form a plurallty `of guard teeth 11, which are grooved at 12 '711v v to form' outwardly extending projections 13 on the ends of the teeth. The guard teeth 11 taper indepth or thiclmess froml the center of the front of the guard to the The two opposite edges of the head 1 are relatively thick and extended downwardly as shown in Figs. 1, 4, and 5 in a manner forming a relatively long transversely'sloping surfacev indicated at 8 in 30 Fig. 5. When the parts are assembled with a blade therebetween this surface forms a long bearing guard which recedes the cutting edge of the blade in t e shaving operation and draws the skin taut ahead of the cutting ed e of the blade. By referring to Figs. 1 an 5, it will be clear that such surface cooperates in a manner considerably facilitating the shaving operation and greatly reducing the danger ...of accidental cutting.l

The outer and inner surfaces 14 and 15 of the outer member 3 are convexly and concavely curved to co-operate with the contour of the inner member 1. The ends of both members 1 and 3 are formed with straight edges '16,-and the outer memberl 1s provided with -lugs 17 for. ndln through holes 18 in the razor bla e 19 an holes 20 through the member 1. The cut- 1,00

ting edges 21 of the blade are conveizly curved, preferably to a circular outllne, when the blade is flat as shown-,m Fig. 6.

The forming of they cutting edges 21 of the blade circular is of advantage in many respects, .principal among which may be.

mentioned the ease with which the same L can besharpened. To sha en the bladesf the same are merely mounte on lathe centers or other like rotary supports. Upon ll rotating the blades thus mounted, the edges'. 21 can be sharpened merely b`y engaging the a strument. The blades can A of easily resharpened in like manner.

The razor as illustrated is exceedingly simple, vcomprising only three pieces. When these pieces are assembled with a blade held therein, as shown in Fig. 1, the blade of the member 1 and held securedbetween the members 1 and 3. In such position, as shown particularly in Fig. 5, the lcutting edges 21 of the vblade are directly adjacentI and co-operate with the projections 13. It should be noted, however, that while the blade extends over the groove 12 and adjacent the projectionsfl3, the blade does not touch,-

- but lsslightly spaced from such projections.

L edge Such arrangement provides a free cutting guarded by the projections 13 and. with a space therebetween for permitting the e groove 12.

As shown in Fig. 2, the outer member 3 is spaced considerably back of the edge of the blade, whereby the lsame in no way interferes with the cutting action. The convex curvature of the cutting edge of the blade (Fig. 2) in cooperation with the transverse curvature of the blade as shown in Fig. 1, obviously provides a razor whichl will accomplish the objects ofmy invention with great facility.l It is believed that the construction and operation of my invention will be clearwithout furtler description herein.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is d `1. A double edged safetyRraz-or comprislng an inner mem er having opposite edges thereof-convexly curvedvand formed with guard means for cooperating with the sharp edges "of a blade, the outer blade receiving surface of the member being curved convexly-transversely toward and from the said opposite edges, and each such edge being relatively thick and extendedtoform a relatively long tranversely sloping surface, .an outer cooperating member, and means for drawing thetwo members'together with a blade held therebetween and with the sharp edges thereof adjacent the said guard means and upper portion of the said sloping edge surfaces, the said sloping surfaces being the lade to facilitatethe' shaving operation course be adapted to cooperate wlth theesharp edges of 2. A double-edge safety razor comprising an inner member Vhaving opposite edges -thereof convexly curved and formed with' ard means for co-operating with the sharp edges of a blade, whlch sharp edges'are convexly curved to a circular outline having a comi mon center when the blade is flat, theouter y flexed to the contour of the outer surface blade-receiving surface of the member bein curvedA transversely and oonvexly toward and from the said opposite edges, an outer co-operating member, and means for drawing the two members together with a blade held therebetween and with the sharp edges thereof adjacent the said guard means.

3.. A safety razor blade having a cutting edge forming a segment of a circle the center of which is within the body of the blade, the blade having a circular hole therethrough at the said center. l

4. A doubleedge safety razor blade having the two cutting edges thereof respectively on `opposite sides of the blade and forming lsegments of a circle the center of' whichk is disposed therebetween at the center of the blade, the blade having a circular hole therethrough at the said center.

5i; A double edged safety razor` comprisi ing an` inner member having opposite edges thereof convexly curved 4and formed with guard means for cooperating with the sharp edges of ablade, lthe outer blade receiving surface of the member being curved convexly-transversely toward and from the said opposite edges, and each edge being rela-y tlvely thick and extended to form a relatively long transversely sloping surface, an outer cooperating member, and means for drawing blade held therebetween and with the sharp edges thereof adjacent the said guard means and upper portion of the said j the 4said slopingv adapted to cooperate with sloping edge surfaces, surfaces bem the sharp e ges of the blade to facilitate "the shaving operation .and the relatively thick edges-tapering in thickness romv the center to the ends thereof and gradually decreasing the length ofthe sloping surfaces.

- 6. A double edged safety razor Fblade of approximately circular form having opposite cutting portions forming segments of circle the center of which is the center o the blade,- said blade being flexed drical surface.

RAYMOND MCDONALD ADDISON.

to-a cylinthe two members together with av