US1999941A - Safety razor - Google Patents

Description

April 30, 1935. .1. E. McwlLLlAMs 1,999,941

SAFETY RAZOR Filed Aug. 13, 1952 ATTORN EY Patented Apr.'30, 1935 'Y UNITED STATES' PATE SAFETY RAZOR .loseph McWilliams, New Yorin Al-)Plic'atin August 13, 1932, Serial N0.62v8,6 89

This invention relates to safetyrazors ofY the double-edged, flexible blade type, and its ob-` positioning andy ject is to'fimprove thek blade clamping means of such razors. YIn all razors of this type, so far as I ainaware, the cap or clamping plate isprovidedfwith studs, bars, or other projections Wwhich enter corresponding holes or recesses in the blade and guard plate, and 'thus definitely fix the relative positions of these ele- 1o ments, or the guardplate is provided with projections which entercorresponding openings in the blade and thus locate the bladewith reference yto the guard, andthe blade in turn is denitely xed with 'reference to the cap.

In accordance with'the present invention I' the guard and cap, the upper face of the guard vso is made cylindrically convex and the under face of the cap concave. This is the usual construction in razors of this type. I provide vsuflicien't play between the anges and the ends of the guard and between the threadedpin and the guard to permit the guard and cap to seat themselves naturally. in proper position as they arev drawn together to flex the blade. VThis natural seating follows from the` curvature of the parts and the limited play between them.

' Another improvement of the present invention consists in mounting the guard plate for relative lateral adjustment. The hole in the guard through which the threaded pin on the cap passes to engage the handle is made sufficiently wider than the pin sothat the lateral position ofthe guard with reference to the cap can be varied within` limits before the parts are clamped into final operative position. The interengagement of blade and cap prevents lateral adjustment between them, except that due to lexure, and the cap being mounted upon the guard so as to permit of relative lateral movement it'follows that the setting of the blade in relation tothe guard can be varied at will.

In the accompanying drawing in which I have illustrated a preferred embodiment of my invention, Figure 1 is an end View ofthe assembled raaor -Figure 2 is a longitudinal, vertical section,

on Van enl gedA scale, through the cap and guard taken along line 2-2 of Figure l; Figure 3 isa along line 3--3`ofV Figure`5; Figure 4 isan enlarged perspective of the cap With'the underside shown uppermost; Figure' is afbottom'viewof the guard with the handlefremovedbut with the transverse section .on an enlarged scale taken 5 blade and cap'in position; Figure 6 is` a bottom view 'of the cap with the blade in position and the guard and handle removed and Figure 7 is a view of the blade itself. f f

VThe razor illustrated in the drawing comprises a cap or clamping member l, a guard plate Y 2 and ahamne L3.- l A flexible double-edged blade 4 is held between and Vflexed bythe cap and guard as illustrated in'FigureV 3.Y Assembly oftheparts is eifected through a screw-threaded pin 5 depending from the middle of the cap I, passing through a slot 6, or other suitable opening in the blade, and a hole 1 in the guard plate and threadedly engaging the upper endjof vthe handle, all as illustratedin Figure 3. y y Y The ends of the cap .arelprovided with depending fianges 8 which `overhang the ends of the guard which are smooth and provided with neither recesses nor projections. trated a single flange at one-end of the cap and a double, or notched, flange at the other designed to receive a corresponding notch 9 and tongue l0 on the blade. The precise form of ange is not material, however. flange may be used on either end with a corresponding modiiication in the form of the blade.

The blade makes a relatively-snug t with the cap, but there -is suliicient play betweenl the guard and the anges l8 and the pin 5 yto permit the guard to take a natural seat when theparts are assembled into shaving relation, due to the cavity of the cap and the convexity of the guard.

reference to the shaving edge of the blade I make the hole'y 1, through which the pin 5 passes, of

sufficient size to permit transverse movement of the guard with reference to the pin. In .addition, the arcuate underface of the guard adjacent the hole 'I is countersunk at Il-to provide -ing pressure is applied. Thus,in the illustration,

the distance A from the left-handishaving edge to the outer edge of the guard is smaller than the corresponding distance B on the other side Either the single or-double;

I have illusy' of In order to make the guard adjustable with of the razor. I This adjustment, as well as the natural seating of the partsis made possible by the fact that'the ends of the guard are smooth and do not interlock with the depending flanges on the cap.

I claim: 'v Y Y Y 1. In a safety razor comprising a concavel cap having a centrally positioned threaded pin thereon, a convex guard having smooth ends and a slot vreceiving said pin, said slot permitting said guard vtofbe adjusted laterally with respectto said cap, an interposed flexible blade having an opening receiving said pin and a handle engaging the pin and guard for drawing the cap and'v guard together to flex said blade with said-guard e in diierent positions with respect to said blade,l

the combination of depending flanges onthe ends of said cap interlocking 'with .said blade; saidv iianges being spaced from said guardand the curvature of said cap and guard causing jthecapv and guard .toseat themselves in proper alignment during-,the blade flexingoperation irrespectiveV of. .the position of ,the guard, laterallywith` re'-l spect to said capw l i n v 2. .In .a safety razor comprising -anconcave cap having a centrally positioned threaded pin, -a

convex guard having smooth endsV and a ltransversely extending slot receiving said pin, `said slot permitting transverse movement` lof. .said guard with respect to -said cap, an interposed iiexible blade loosely mounted withrespectto said guard and having an opening receiving Ysaid pin, means engaging said pin and guard for drawing said capr and guard together to ex said blade 'with` said guard.Y in diierent positions with re- Spect to said cap, the combination Yof depending flanges on the endsof the cap, said flanges overhanging'the ends of the guard and. engaging said blade to position the blade with respect to the cap, there being clearance between the flanges and the guard and the curvature of the cap and guard'causing the cap and guard to seat themselves in proper alignment during the blade flexing operation.

3. In a safety razor comprising a concave cap having a centrally positioned threaded pin, a convex guard having a slot to receive said pin, an interposed exible blade having `,an opening to receive said pin and a handle engaging said pin and guard to draw said'capV and guard togetherV .to flex said blade, said capY having depending flanges at its ends interlocking with said blade .and clearing the ends of :said guard, the curvature of said cap and guard normally serving to longitudinally align said cap and guard and said -fand the blade ilexed, Vthe slot in .said guard permitting lateral adjustment-:of said guard, the

combination of dependingA` ilanges en the `ends* of the cap interlocking with vsaid lblade and clearf ing the endsof the guard,the -.curvatureof said cap and'guardnormally aligningtheguard andV cap during the blade flexingoperation while permitting lateral adjustment-,of said guard with respect .to said cap and b1ade. 'l

` JOSEPH E. MCWILLIAMS.

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