US1871789A

US1871789A - Safety razor

Info

Publication number: US1871789A
Application number: US400909A
Authority: US
Inventors: Green Frederick Hayden
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-10-24
Filing date: 1929-10-19
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

F. H. GREEN Aug. 16, 1932.

SAFETY RAZOR Filed Oct. 19, 1929 2 Sheets-Sheet l I lll lll &

lnventoi'.

F. H. GREEN Aug. 16, 1932.

SAFETY RAZOR Filed Oct. 19. 1929 2 Sheets-Sheet 2 Patented Aug. 16, 1932 FREDERICK HAYDEN GREEN, F CHELTENHAM, ENGLAND SAFETY RAZOR Application filed October 19, 1929, Serial No. 400,903, and in Great Britain October 24, 1928.

This invention is for improvementsin or relating to safety razors of the type in which a blade is adapted to be secured in shaving position or allowed to swing free for the purpose of stropping the blade.

With safety razors of the described type,

. the bladehas generally been caused to swing periodically through approximately 180 by means of a rollerin frictional or geared relation with the blade,.the roller being rotated by frictional contact with a stropping surstropping action.

According to the present invention, asafemy razor comprises a single-edged razor blade,

a ll-shaped guard therefor lying substantially in the plane of the blade, a handle secured to the guard at approximately to the plane thereof, trunnions by which the blade is mounted freely swingable in the guard about an axis parallel to and near its rear edge, shoulders along the blade at each side thereof in rear of the aXis of the trunnions, a blade-lockinglatch pivoted to the handle to swing to and from a position in which it resiliently bears upon the shoulder at one side of the blade, a blade-adjusting set screw mounted in said latch and bearing upon the blade, at he same side thereof as the said shoulder, at a point intermediate the cutting edge of the blade and the trunnions, the said shouldersbeing of such depth that when the blade is released and pressed downward by the guard upon a fiat stropping surface, the shoulders incline the blade at its cutting edge to an appropriate stropping angle relatively to said surface.

In order that the invention may be clearly understood reference is directed to the accomp anying drawings, wherein Figure 1 is a front elevation of a safety razor constructed in accordance with the invention.

handle in an process of stropping and Figure 6 is a sectional view of the stropping element provided with an outside casing, and showing a recess for the reception of the razor when not in use.

Figure 7 is a frontelevation of a safety razor constructed in accordance with the invcntion and illustrating a construction of connecting the blade carrying guard to the ad ustable manner.

-Figure. 8 is a sectional side elevation of 1 Figure 7.

Referring to Figures 1 and 2, which illusv.trate a-;.safety razor comprising a handle 1- connected to a U-shaped guard 2 which is arranged to project forwardly as clearly shown in igure'2, a blade 3, is pivotally supported at l,.5 in the li -shaped guard 2, and is maintained in the shaving position by means of a latch 6 screwed to the handle 1 by means of a screw 7, the extremity of the latch 6 bearing on the upper part of the blade 3 and preventing the same from rotating.

The adjusting screw 8 is provided in order that the edgeof the blade may be adjusted relatively to the base of the U-shaped guard 52.

In order that the razor blade may be stropped a stroppingelement 9 is provided which comprises a pair of istropping surfaces 10., 11 mounted on a rectangular boxlike support 12 one side of which is left open for the reception of the safety razor when out of use. 'The receptacle 12 is-so positioned relatively to the stropping element 9 that a pair of

rectangular recesses

13, 14 are pr vided at eachend of the said element.

V The

stropping surfaces

10, 11 are mounted. on the receptacle 12 1n such a manner as to tion as shown in Figure 3. By moving the safety razor in the direction of the arrow Figure 3 to the position shown at the end of the said figure, the blade will be stropped, and will thereafter fall into a vertical position moving in the arc of a circle, as shown by the arrow Upon the return movement of the handle that blade will be drawn over the stropping surfaces until the edge thereof is released by the end of the stropping surface and permits the blade to fall in a similar manner into the recess 13.

It will be appreciated that the bottom wall of the end portions ofthe channels 15, 16 (17, 18), that is to say, the portions of these channels which extend beyond the end of the stropping surfaces function as supporting rails for the razor after the razor has passed beyond the limits of the stropping surface in its reciprocation therealong.

Referring" now to Figure 5 wherein the

stropping surfaces

10, 11 are increased in thickness in order that the extremities of the U-shaped guard 2 are out of contact with the

channels

15, 16 or 17, 18. With this construction when the blade is being stropped, the blade will when the holder is moved beyond the extremity of the stropping surface be drawn forwardly and follow the path indicated by the dotted line 21, the extremities of the limbs of the U-shaped guard dropping at-the end ofthe stropping surface so that the edge of the surface contacts with the sur face of the blade and jerks the same forwardly into the recess 14:.

A similar movement takes place upon the return stropping action of the safety razor, the blade being erked forwardly to fall into the recess 13.

It will be understood that the guide channels arranged on each side of the stropping surface act as guides permitting the blade to receive pressure, and the extensions of the channels on the well portions support the U- guard at the finish of the'stropping movement. 7

Instead of causing the blade to drop into thetwo wells to effect the reversal of the blade, the guide channels may be arranged sothat the ends of the arms-of theguard at the end of their travel in one direction drop so as to cause the blade to strike the end of the stropping surface and swing upwardly, over into the reverse position.

Referring now to Figures 7 and 8 which show a construction, in which the U-shaped guard 2 is adj ustably mounted on the handle 1.

In this construction the U-shaped guard 2 is connected to the handle 1 by means of a knuckle joint comprising a female member 22 and a male member 23, pivotally connected together by means of a pivot 24.

The'male member 23 is provided with a screw-threaded stem 25 which is engaged with the handle 1, the said handle 1 being provided with a cup-shaped end 26 which coacts'with the curved extremities 27 provided in the female member 22. a

It will be seen that on loosening the handle 1 it is possible to adjust the position of the U-shaped guard 2 relatively to the handle 1, and to lock the same in the adjusted position by bringing the cup-shaped end 26 thereof into engagement with the curved surface 27.

I claim:

A safety razor, comprising a single-edged razor blad'e,a U-shaped guard therefor lying substantially in the plane of the blade, a han-. dle secured to the guard at approximately 45 to the plane thereof, trunnions by which the bladeis mounted freely swingable in the guard about an axis parallel to and near its rear edge, shoulders along the blade at each side thereof in rear of the axis of the trunnions, a blade-locking latch pivoted to the handle to swing to and from a position in which it resiliently bears upon the shoulder at one side of the blade, a blade-adjusting set screw mounted in said latch and bearing uponthe blade, at the same side thereof as the said shoulder, at a point intermediate the FREDERICK HAYDEN GREEN.