US1507264A - Safety razor - Google Patents

Description

Sept. 2 1924.

W. M. STEVENSON SAFETY RAZOR Filed Nov. 14, 1922 INVENTOR M?! M .fire/zsan I BY W W ATTORNEY Patented Sept. 2, 1924.-

. UNlTED STATES PATENT OFFICE.

WALTER M. STEVENSON, E SEATTLE, WASHINGTON.

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Application filed November of Washington, hav invented a certain'new and useful Improvement in Safety Razors, of which the following is a speci cation.

My invention relates to improvements in safety razors and the objects of my invention are: to provide a safety razor blade of triangular cross sectional shape whereby the cutting edge of such blade will be substantially nonfiexible and will not bend or spring even when cutting the heaviest and ten best beards.

0 provide a safety razor blade of trian lar cross sectional shape having longitu inally extending grooves on opposite sides thereof wherein aholder may be caused to engage for the purpose of firmly and securely holding the blade so that it may be sharpened.

To provide aholder for a blade of this na- I ture that will make it impossible to cut the face with the blade and that will further make it impossible to shave when the razor is tilted at any angle except the proper cutting angle.

To provide a blade holder of simple and eficient construction that may be quickly and easily manipulated to insert or remove a blade, that will not clog easily or become filled with lather and that is easily cleaned and dried after it has been used.

Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawings, wherein Figure 1 is a view in perspective of a razor blade of triangular cross sectional shape constructed in accordance with my invention;

Fig. 2 is a view in side elevation of my safety razor showin the blade in an opera- 1 tiveposition in the older;

F1g. 3 is an enlarged view in cross-section through the holder and blade;

Fig. 4 is a View in cross-section similar to Fig. 3, except that the blade and upper ca pr plate are removed;

- 5 is a view in cross-section substan-.

tially on broken line 5,, 5 of Fig. 3; v

6 is a somewhat diagrammatic view in front elevation on broken line 6, 6 of Fig. 3, showing the relation between the outside guard members and the intermediate guard members; and v 14, 1922. Serial No. 600,843.

Fig. 7 is a View in perspective showin a form of holder that is used in sharpening the blade.

Referring to the drawings throughout which like reference numerals designate like arts, 1 have shown a safety razor embodymg a blade 8 of triangular cross-sectional shape, commonly known as a wedge blade, that tapers on substantially straight lines from a relativel wide rear edge 9 to a sharp cutting or shaving edge 10 at the front, the

angle of divergence between the two sides being great enough so that the thinner 'portion of the blade adjacent the cutting edge 10 will be strong and rigid enough so that it will not spring and bend even when the blade is used for cutting the coarsest and toughest beads.

lhe blade holderiembodies a base body plate 11 having a downwardly bent rear end portion 12 to which a handle 13 is arran ed to be detachably secured as b a three ed stud 14 on the end of the hands that screws into the plate portion 12. The ends-of the plate 11 are bent upwardly at substantially right anglesthereto and are shaped so as to form tapered grooves 15 having ledges 16 on which one side of the blade 8 may rest and overhangin portions 17 with which the opposite side 0 the blade may engage, the grooves 15 at opposite ends of the body plate 11 being just far enough apart to receive the epds of a blade 8. 1 v

The body plate 11 terminates at its front end in a plurality of guard members 18, and in two wider blade supporting members 19 disposed one at each side of the plate 11 and each provided with an upwardly protruding bladepositioning lug 20 against which the edge of the blade may rest when the same is inserted for use. The guard members 18 are slightly below the plane of the blade supporting end members 19, as shown in Fig. d, and each of said guard members curves downwardly below the cutting edge of the blade as shown at 21 in Figs. '3 and d.

The blade 8 is held in position in the grooves 15 by a cover plate 22 I: a downwardly curved forward edge 23 tat rests upon the blade, a downwardly projectsame to spring outwardly enough'to' snap. -v

be'rances ,and the ends of the cover plate arepr'ovided with recesses-27 that fit over said proturberance and hold'the cover late in the proper position. The resilience 1n the ends 25 of the cover plate allow the over the protuberance 26. The outer surfaces of the ends 25 of-.-the cover plate are referably scored as shown in Flg. 2, to acilitate handling thesame;

- The front edge 23 of the 1 cover plate22 rests on the blade 8 and extends upwardly far 'enough above such blade, as shown in Fig. 3, so that the razor is placed on the face with the ends of the uard members 18 and-the outer surface 0 the cover plate resting against the face the cutting edge 10 of the blade .will be applied lightly to the face at exactly the correct angle to out most efficiently. -If the razor is tilted too far forwardly the ends of the guard members resting on'the face will lift the cutting edge of the blade of of the face and in a similar manner ifthe razor is tilted too far to the rear the cover plate 22 resting on the face will "cause the guard members and cutting edge of the blade to be lifted oif of the face. From the preceding description it will be seen that the. guard members 18 and cover plate arranged as shown and described con stitute means-{for determining the angle at -which. the -blade.-;'must be held relative to the "facein shaving and further make it ipracticallyimpossible .-to shave with the razor-if the same {is applied to the face at other than the correct angle.

p The-cover plate 22 may be applied to or removed from-the" razor very easily by grasping the ends 25 o Quickly and such cover plate between the thumb andforefinger.

e Blades 8 are insertedfrom the rear into the tapered slots 15 and are withdrawn in the same manner, the cover plate 22 necesearily being removed before a blade can be inserted or removed. Theidownwardly bent portion 12 of the base plate 11 affords enough room below the rear edge ofthe blade to.

enable a personto grasp the same with the fin r when-the blade is to be removed.

e blade is supported at the two ends by the :grooves '15 but does not rest on the baseplate 11.

The blade by reason of its triangular shape is non-fiexible and does not need to be firmly grasped and supported near the cuttin edge. This non-flexible feature is a very feci ed advantage in cutting heavy and tough beards as hereinbeforepointed out.

The blade 8 is provided on opposite sides with longitudinally extending slots 28 .wherein the edges-29 of a holdingdevice 30 may enga e for the purpose of holding the blade or stropping or sharpening, the blade being arranged to be slipped into the holding device from one end. The holding device 30 may terminate in a stud 31 that will fit snugly within the end of the hollow handle 13 so that such handle 13 may be removed from the razor and used as a handle for sharpening the blade.

The foregoing description together with the accompanying drawings clearly disclose what I now consider to be the preferred embodiment'of my invention, but it will be understood that this disclosure is merely-illustrative and that such changes in the form, dimensions and arrangement of the various parts of the device may be resorted to as are within the scope of the following claim.

What I claim is: I

A safety razor embodying a blade holder a cover plate, a downwardly bent forward edge on said cover plate arranged to rest on said blade, a. downwardly bent rear edgehon said cover plate arranged to .fit over the rear edge of said blade, down:

wardly bent ends on said cover plate arranged to fit over the upwardly projecting and members of said base'plate, and snap means for releasably securing said cover plate to said base plate.

rojecting end membersainthe projecting end In witness whereof, I hereunto subscribe my name this 1st. day of November, A.'D. 1922.

WALTER M. STEVENSON.

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