US2546405A - Safety razor - Google Patents

Description

March 27, @951 G, RAUGLAS 2,546,495

SAFETY RAZOR Filed Dec. 29, 1945 Patented Mar. 27, 1951 UNITED STATES PATENT OFFICE SAFETY RAZOR Gerard Rauglas, Chicago, Ill. v Application December 29, 1945, seria1 No. 637,893

8 Claims.

IMy invention relates to razor blades and holders. A

Oneof the objects of my invention is to provide an improved safety razor in which the blade can be conveniently, quickly, accurately and securely attached to the holder and detached therefrom.

A further object is to provide such a razor in which the blade is accurately positioned and pressed snugly against a backstop.

A further object is to provide a safety razor having a longitudinally-slotted blade to enable the rearportion of the blade to be clamped snugly on the holder and the front portion of the blade to vibrate independently of the rear portion so that its action will be similar to that of the front edge portion of a high grade hollow ground straight razor.

Further objects andadvantages of the invention will be apparent from the description and claims.

In the drawings, in which one form of my invention is shown,

Figure 1 is an elevational side view of a razor blade holder and blade;

Fig. 2 is a section substantially on the line 2-2 of Fig. 3 showing the blade in clamped position;

Fig. 3 is a front elevational view of the holder and blade;

Fig. 4 is a rear elevational view;

Fig. 5 is a section of the upper part of the holder and blade substantially on the line 2--2 of Fig. 3 but showing the blade released;

Fig. 6 is a perspective view of the rockable clamping and positioning member, and

Fig. 7 is a plan view of the blade.

The construction shown comprises a metal handle I having a central axial recess 2, a thin somewhat flexible razor blade 3 having a longitudinally-extending slot 4 therein and a holder having a tubular extension 5 screwed into the handle and having mounted thereon a rockable member 6 having a rock yoke l extending through the opening 4 in the blade, a rockshaft 8 on which the rock yoke 'I is mounted, a rock arm 9 eX- tending through a loop in the spring-pressed plunger I, which is slidable in the tubular extension 5, and a thumbpiece II secured to the rockshaft for rocking it to cause the rock yoke to release the blade 3 for replacement.

The longitudinal slot in the blade is provided with two notches I2, one at each end thereof, to receive the arms I3 of the yoke member and to provide a shelf -like extension between the notches I4 underlying the crossbar I5 so that the crossbar serves as a blocking means to assist in pre- 2 venting the blade from becoming detached from the holder.

A coil compression spring I6 surrounds the plunger IIJ bearing at one end against a washer Il on the plunger and at its other end against the end of the threaded extension 5 of the holder. This spring-pressed plunger tends to rotate the rockshaft S in a counterclockwise direction, as viewed in Figs. 1, 2 and 5. This will cause the ends of the arms I3 of the yoke to bear against the edges of the notches I2 in the blade, tending to force the blade to the rear and to pull it inwardly to clamp it against the holder. The movement of the blade to the rear is limited by engagement of the rear edge of the blade with a pair of stop lugs I 8 on the holder. The blade is notched at IS for the reception of these lugs I3. The edges of these notches taper uniformly inwardly and rearwardly, as shown in Figs. 4 and '7, to insure centering of the blade laterally when it is pressed to its rear position. The edges of the notches I2 in the blade taper uniformly inwardly and forwardly, as shown in Fig. 7, so that as the arms of the yoke engage these flaring or sloping edges they also will tend to center the blade laterally. The inner edges of the arms of the yoke diverge rearwardly at those portions which engage the edges of the notches, thus further tending to center the blade laterally preliminary to the na1 centering elected by the lugs I8 and notches I9.

In general, the crossbar I 5 does not quite touch the blade when the blade has been pushed to its extreme rear position, but this crossbar will serve to prevent any undue deflection of the blade and assists the user in placing the blade in the holder. If desired, the crossbar may include an elongated roller for rolling engagement with the skin as the razor is drawn along. This crossbar also serves to give the proper angle of the blade with respect to the skin. When using the razor, the user can feel the crossbar I5 engaging his face, which will let him know that the holder is at the proper angle.

In placing the blade on the holder, the user, placing the holder in one hand, will press downwardly on the thumbpiece II to bring the yoke 'I to the position shown in Fig. 5. With the other hand, he will hold the blade 3 between the thumb and forenger, bringing the slot 4 in the blade into registration with the crossbar and then slip the blade down over the crossbar and release the thumbpiece to allow the arms I3 to engage the edges of the notches I2 and press the blade rearwardly to bring it snugly against the backstops front edge of the base 29.

3 i8 and to clamp the rear portion of the blade snugly against the holder.

Since the clamping bar l engages that part of the blade in the rear of the slot 4, it enables that part of the blade in front of the slot to vibrate independently of the rear portion of the blade so that its action will be similar to that of a high grade hollow ground straight razor.

In practice, I have found that good results are obtained by makingv that portion of the blade lying in front of the slot about to 1A" wide.

The blade may be cleaned easily without removing it from the holder by holding it under a faucet so that the water will enter the chamber formed by the base 2Q and cheeks 2l of the holder and the lower side of the blade 3. The holder should be held under the faucet in such a way that the water enters from the open rear side of this chamber and is forced downwardly between the front edge of the blade 3 and the This chamber forms, in effect, a chamber for collecting lather, etc., while shaving, and a funnel for directing the water from the faucet against the blade when itis being cleaned.

Further modic'ations will be apparent to those skilled 'in the art and it is desired, therefore, that the invention be limited only by the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. The combination with a razor blade having a single cutting edge of a blade holder having a blade engaging seat, said blade having rearwardly facing abutment-engaging shoulder means for limiting the rearward movement of the blade on the blade seat, and having abutment-engaging shoulder means for limiting the endwise movement of the, blade on the blade seat, the end edges of the blade extending forwardly from the outer ends of the rearwardly facing shoulder` means to the cutting edge of the blade, said blade having a long narrow slot therethrough extending longitudinally of the blade and terminating adjacent the said end edges to provide two relatively narrow arms connecting the portion of the blade in front of the slot and the portion of the blade to the rear of the slot, said holder having a laterally elongated rockable pusher arm extending beyond Said seat into said slot, the rear edge of said slot having laterally extending forwardly facing arm-engageable shoulder means whereby the blade may be pressed rearwardly to force said rearwardly facing shoulder means rearwardly, and spring means urging said roei; arm rearwardly.

2. The combination with a razor blade having a single cutting edge of a blade holder having a blade engaging seat, said blade having rearwardly facing abutment-engaging shoulder means for limiting the rearward movement of the blade on the blade seat, and having abutment-engaging shoulder means for limiting the endwise movementV of the blade on the blade seat, kthe end edges of the blade extending forwardly from the outer ends of the rearwardly facing shoulder means to the cutting edge of the blade, said blade having` a long narrow slot therethrough extending longitudinally of the blade and terminating adjacent the said end edges to provide two relatively narrow arms connecting' the portion of the blade in front of the slot and the portion of the blade to the rear of the slot, said holder having a laterally elongated rockablepusher arm extending beyond said seat 'lli into said slot, the rear edge of said slot having laterally extending forwardly facing armengageable shoulder means whereby the blade may be pressed rearwardly to force said rearwardly facing shoulder means rearwardly, said arm having a manually operable member rockable with said arm extending forwardly from the axis of said rock arm to a position in front of the. holder.`

3.' The combination with' a razor. blade having a single cutting edge of a blade holder having al blade engaging seat, said blade and holder having interengageable means for limiting the rearward movement of the blade on the blade seat and for limiting the endwise movement of the blade on the blade seat, said blade having an opening therethrough, said holder having a pusher arm having a free end extending beyond saidseat into said opening, and spring means for forcing said arm rearwardly to bring said inter- -engageabl'e rearward movement limiting means into engagement.

4. The combination with a razor blade having a singlecutting edge of a blade holder having a blade engaging seat, said blade and holder having'interengageable means for limiting the rearwardfmovement of the. blade on the bladeV seat and forlimiting the endwise movement of the blade on the blade seat, said blade having an opening therethrough, .said holder having a pusher rock arm havinga free end extending beyond said seat into said opening, and spring means Yfor forcing said arm rearwardly, to bring said interengageable rearward movement limiting .means into engagement, said rock arm having fa manually operable member rockable. with said arm extending forwardly from the axis of saidflr'ock arm to a positionin front of the holder;

5. For use with a razor blade having a single cutting edge, a blade holder having an outwardly facing blade engaging seat, forwardly `facing blade engaging shoulder means for ll-imting the rearward movement of the blade on the blade seat, and blade-engaging shoulder meansy for limiting the endwise movement of the blad'eon the blade seat, said holder having a pusher arm having a free end extending beyond said' seat into an opening in the blade whereby theblade may be pressedrearwardly toy force it into; engagement with said forwardly facing shoulder means, and spring means `urging said free end. rearwardly.

6;.For use with a razorV blade having a single cutting edge, ablade holder. having ran outwardly facing blade engaging seat, forwardly facing blade engaging shoulder means for limiting the rearward movement of. the blade on the blade seat, and' blade-engaging shoulder means for limiting the endwise movement of the blade on the blade seat, said holder having apusher arm having av free end extending. beyondV said seat into an opening inthe bl'ad'e whereby the blad-e may. be pressed.-` rearwardly to Iforce it into engagementwith said forwardly facing shoulder means,Y and. spring means' urgingy said` free endv rearwardly, said arm being .rockablymountedv on` said holder andy havingI a manually4 operablei member rockable with said arm extending fer-- wardly from the axi'sofisaidroch.arm to a posi'- tion in front of' the holder.

7.; The combination. with a razor blade, of a blade holder mounted on. af handle andi-fixed with respect thereto, said holder having an outwardly facing blade'seat along which said` blade may slide andYV having positioning means for limiting the rearward movement of the blade in the holdier, and spring urged rockable means for pressing said blade rearwardly against said positioning means and clamping the blade inwardly on the seat, said blade being apertured to provide for the passage therethrough of said roolzable means and to provide an edge engageable by rooku able means in its rocking and clamping action.

8. The combination with a, razor blade, of a blade holder mounted on a handle ixed with respect thereto, said holder having an outwardly facing blade seat along which said blade may slide and having positioning means for limiting the rearward movement of the blade in the holder and positioning it laterally, and spring urged rockable means for pressing said blade rearwardly against said positioning means and clamping the blade inwardly on the seat, said blade being apertured to provide for the passage therethrough of said rockable means and to pro- Vide an edge engageable by said rockable means in its rocking and clamping action.

- GERARD RAUGLAS.

REFERENCES @IEEE The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Narne Date 969,724 Pratt Sept. 6, 1910 1,257,079 Hartman Feb. 19, 1918 1,718,008 Segal June 18, 1920 1,770,504 Dallowitz July 15, 1930 1,848,078 Janssen Mar. l, 1932 1,856,305 Witter May 3, 1932 1,891,627 Muros Dee, 20, 1932 2,125,502 I-Ioltzman Aug. 2, 1938

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