US1328024A - Safety-razor - Google Patents

Description

vE. n. WHARIQN. SAFETY RAZOR.

APPLICATION FILEDv FEB. 3. 19H.

Patented Jail'. 13,1920.

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57 l 8am@ y 675/7 TUR/JE g/ U'NrrED STATES 'PATENT vomucia @wenn n. wm'ron, or mnnro'an, msssncnusnrrsgsslenon '.oGILLEr'rE SAFETY RAZOR COMPANY, 0F BOSTON, MASSACHUSETTS, A COBPOBATIGN 0F IIASSABHUSETTS.

` specihcation,

' This invention relates" to safety razors of that type in which' the blade is iexed transversely when clamped in the holder and is capable of having its cutting edge adjusted with relation to the. guard by varying the extent to which the blade is flexed.

' When a safety razor is in use the u-ard serves not only to protect the skin from eing cut but also to smooth it -out and depress it slightly in front of the blade edge, and experience has shown that while the shaving qualities of such a razor depend primarily upon the sharpness of the blade .they also depend, to an important extent, upon the distance between the blade edge and the point of contact of the guard with the skin and uponj the angle at which the blade is.

presented to the beard in shaving. In prior razors of the iexible-blade type, however, the blade edge is located directly over the guard, so that variations in the adjustment of the edge affect both the distance between.

the edge and the guard andthe distance between the edge and the point at which the skin is depressed in front of the edge by the guard, andin consequence of this fact and of the further fact thatthe interchangeable blades are liable to-diii'er slightly in width, such a razor when used with different blades varying in width and with different adjustments of a given blade is necessarily held at different angles under certain conditions and does not always give equally satisfactory results, even though the blade edges are properly sharpened.

The present invention has for its objectvv the rovision of -a safety razor o f the ilexiblelade type which will be free from the A objection above referred to` and is characu teri'zed by the location of the cutting edge soA - of the'i'-exible blade directly overa channel which extends lengthwise of the bladeA behind the guard, so that movements of the lade edge during adjustment take4 place i over the channel. With this arrangement,

f SAFETY-RAZOR.

Specification ot Letters Patent. f

struction but is '15m-,enna Jail. 13,1920.

y Application tiled February 3, 191i. Serial Rb. 146,497.

flexing the blade more or less, such adjustfor vsatisfactory shaving relnain essentially the same for all blades, even though they" vary slightly in width, andfor all ositions of adjustment of a given blade. y invention also includes `certain other eaturesl which. serve in combination with the foregoing to hold the blade edge equally rigid vin all positions of v adjust1 nent, as hereinafter explained.- l

My invention is applicable to razors which vary widely as regards their general con' referably embodied in a razor having a cable-edged blade and a guard for each blade edge. Such a razor is illustrated in the accompanying drawings, in which: 'i

Figure 1 is an cud elevation, partly in section, showing the principal parts of a ing head 3 secured to one end of the handleand provided at each of its opposite 'longitudinal edges with a row of teeth-4 consti-I tuting a guard, a blade-clamping cap 5 provided with a central' threaded stem' 6 and with blade-positioning pins-7, of which one is shown-inthe ligure, a double-edged iexi-j 'ble blade 8 adapted to be clamped between the head 3 and the-cap 5 with the stemt' and pins 7 passing through perforatio'ns in the blade and the head, and a nut 9 rotata-' y ble inthe outerl end ofthe handle 2' and adapted to coperate with the stem 6 to force the vcap and the head togetherand clamp the blade between'them, the opposed surfaces of the ca and head beingsimilarly i curved transverse y in order to flex the blade.

As described thus far the construction is the same as in the familiar Gillette razor, but inmy razor each edge ofthe blade when positioned inthe holder' overlies-a channel 10 extending longitudinally behind the cor- 'so razor embodying my invention in one form; j

ings comprises a handle 2, a blade-supporty ion y ma f 55 respect tothe guard can be adjusted by while the elevation 'of the blade edge with responding guard and preferably formed on l 'a curve of such shape that it descends 11 shaving, and if a closer shave is desired an increased exposure of the blade edges is obtained-by slightly unscrewing the nut 9 and thereby permitting the blade edges to spring outward, but since the movements of veach blade edge, during adjustment, take place behind the corresponding uard instead of over it, the relations whic it is important to maintain in order to secure satisfactory results remain unchanged, as previously explained.

In the lform of razor shown in Figi 'the construction is practically the saine as in Fig. l except that each of the longitudinal edge portions 11 of the cap 5 overhangs the that the varlous adjustments of the blade correspondin channel 10 and is so shaped edges are produced by fiexing the blade about the rear edges of the channels 10 as a fulcrum, instead of flexing itrabout the central portion of the head as a fulcrum, said channels being preferably a little wider than the channels 10 in Fig-1. Theadjustment of the blade edges in this manner has the advantage that the marginal portions of the blade, which alone participate in the adjustment, are ilexed on a relatively short radius and thecutting edges are thereby given great rigidity in all positions. Furthermore, the sharply-defined and closelyadjacent straight edges provided by the longitudinal edges o the cap and the rear edges of the channels serve to straighten the cutting edges of the blade in case the latter is not perfectly flat; whereas the edges of such 4a blade are liable to deviate slightly yfrom a straight line if the blade is flexed 4fon the curved' head as a ulcrum, since in such case the only parts IWhich bear on the blade are the extreme edges of the capvand a4 variable and undefined portion of the curved surface of the head and therefore the restraint to which the blade edges. are subjected cannot be relied y on to straighten them. The overhan of the cap is also ad- 'vantageo'u's, indepen ently of the flexin'gof the blade on any particular fulcrum, for the reason that it aords rigid support for the blade close to the cutting edges of the latter without undesirably limiting the width of the channels beneath.

vIn both forms of razor -above described each blade edge is located at such a distance -behind the guard that the beardis presented .gu

Y tothe exposed edge throughout they length lofthe latter without being deiiected at any point by contact withtheguard itself, and

` provision is made for permitting the lather and the hairs removed in shaving to escape y transversely.

from the channels beneath the blade edges by passing out at the bottom of the head. This is preferably done by extending the guard teeth backward far enough to cause their rear ends to intersect the correspond` width, as shown, but this and the other details of construction may be modiiied in various ways, and it will bie evident that my invention isnot limited to a razor having a double-edged` blade or more than one guard.

li claim: -l. A. safet razor comprising a trans versely-iiexib e blade having a longitudinal cutting edge, in combination with a..blade holder having a guard, a channel llocated behind the guard, means-for positioning the blade with its cutting edge extending lengthwise over the channel, and ,means-for adjustably Herring-the blade transversely. 2. A. safety razor comprising a trans- ,versely-dexible blade having a longitudinal cutting edge, in combination with a blade holder having a guard, a channel located 'in channels over the greater'part of their K.

behind the guard, a fulcrum edge at the rear s of the channel, means for positioning the i means for positioning the blade on said head l' with its cutting edge extending lengthwise over the channel, a bladefclamping cap overhanging the channel behind the cutting edge of the blade and shaped to flex the lattertransversely, and means for forcing the cap and head together.' l

4. A safety razor comprising a trans- .versely-iiexible blade having a longitudinal iio cutting edge, in combination with a blade holder having. a blade-supporting head, a guard', a channel located behind the guard, a

"ulcrum edge at the rear of the channel, means for positioning the blade on 'sald head with its cuttingedge extending lengthwise over the channel, ablade-clampmg cap overhanging the channel behind the cutting edge of the lblade and shaped'to flex the latter on said fulcrum edge, and means for forcing'the capv and-head together.

5. In a safety razor, a blade holder com ,prising'a .blade-supporting head having a guard and a channel located 'behind the v ard, means for positioning a transverselyflexible blade on said head with the -cutting edge of the blade extending lengthwise over the channel, and Ymeans for c am in the blade tothe head and adjustably exlng it ia'o l 6. In a safety razor, a. bladeiholder hcomprising a -blade-supporting head having auard, a channel located behind the guard, a Inlcrum edge at the rear of the channel, means -for positioning a transverscly-lexible blade on said head with thecuttingedge of the blade extending lengthwise over the channel, and means for clampingthe blade4 to the head and adjustably iiexing it on said fulcrun edge.

7. In a safety razor, a blade holder 'com-l prising a blade-supporting head vhwing'a.' guard and a channel located behind the blade and shaped .to iiex latter,onsadfulcrum edge, and means for forcing the cap and head together.

9. In a safety razor,a blade holder conlprising a blade-supporting head having a row of teeth forming a guard, achannel located behind the guard and intersecting the rear portions of theteeth, means for positioning a transversely-flemme blade on Said head with its cutting edge extending lengthuard means for )ositioninv a transversal g a l e -f flexible blade. on said head with the cutting edge of the blade extending lengthwise over the channel, a blade-clamping cap m-'erhanging the channel behind the cutting' edge of the channel'behind the eut-ting edge of the .l

"ing a t1"ansverselyfiexible blade on said -head wise .over the channel, and means for clampg the bladet'o the head and'adjustably Hexingit transversely. u, v g j v 10. In a safety razor, a blade holder -comln'ising abladefsupporting head hav-ing a row of teeth forn'iing a guard, a'channel lo"- cated behind the guard and intersecting the vrear portions o'the teeth, a fulcrum edge at the rear of the channel, means for positionwith its cutting edge' extending lengthwise over the channel, a blade-clamping cap' overhanging the channel 'behindjhe cutting edgev of the bladeandlshaped to'tlex the latterf'ong saidfnlcrum edge, fandnxeans for forcing the cap' and head together. j

Signed at .Boston,jMass., this' `thirty-Iirst 'l

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