US2301552A - Oscillating safety razor - Google Patents

Description

INVENTOR. E. LA CELL :4 PL

ATTORNEY.

Nov. 10, 1942. G E. LA CELL OSCILLATING SAFETY RAZOR Filed May 29, 1939 D .l a 2 iflZZ 2 1 w a 2 "W 4 Z 0 m m 1 Z a i I 57 M8 8 76 4 23 Q 5 i 4 mm e W i u i i Z 5 m 5 5 w n w a 5 U z 4 a I E 4 zm wz I 5 1 0 e 3 2 /2 Id 3 w 5 M M 2 5 z 3 TI/O 1 w 3 3 BY GEORGE lgl.

Patented Nov. 10, 1942 UNlTED STATES} PATENT OFFICE 2,301,552 OSCHJLATING SAFETY RAZOR George E. La Cell, Santa Rosa, Calif. Application May 29, 1939, Serial No. 276,361

4 Claims.

M-y'inventionrelates to improvements in an oscillating safety razor, and it consists of the combinations; constructions and arrangements hereinafter described and claimed.

Anobject of my invention is to provide an oscillating safety razor in which a safety razor assembly is directly connected to a motor casing in such a' manner that the rotation of the motor shaft will cause the safety razor head and blade to oscillate as a unit and with respect to casing. It is'possiole to cause the razor head to osciliate-by' a vibrator instead oi a motor, but a vibrator generally is not powerful enough to ope-rate the device. A motor provides sufrlcient force to cause the'safety razor to continuously oscillate in the direction ofthe length of the blade during the time the blade actually contacts with the face. The head of the safety razor may be removed to permit the removal of the blade for cleaning purposes or for substituting a new blade. Novel means is provided for quickly attaching the head to the safety razor after the blade has been placed in position.

I provide a water-tight joint between the oscillating razor blade head and the base which is attached to themotor casing. This permits the razor-head to be cleaned with water without damaging the working parts. The device is extremelyslmple in construction and is durable and enlcient for the purpose intended. use a razor blade for a much longer time than is customary because the blade will out more effectively when it is oscillated than where the blade is merely moved over the face.

Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawing iormin a part of this application, in which:

Figure 1 is a front elevation of the safety razor head shown operatively applied to a motor casing;

Figure 2 is a vertical section through the device, showing a part of the motor casing;

Figure 3" is a transverse section through the the safety razor head assembly;

Figure 4 is an end elevation otthe safety razor head assembly;

Figure 5 is a section along the line Figure 2; and

Figure 6 is a top ing member,

In carrying out my invention, I make use of a motor casing indicated generally at l, and of the plan view of the reciprocat- It is possible to standard hand size used for electric dry shavers. An electric cord 2 enters the casing at its bottom and a wheel 3 projects through a slot 4, this wheel being momentarily rotated by hand to start the motor shaft 5 rotating the instant the motor (not shown) is connected to a source of current. In place of the electric dry shaver head, I substitute a novel safety razor head and base assembly.

he baseof the safety razor assembly comp es a housing 6 that has a length corresponding to the length of the top of the casing i and a width corresponding to the width of the casing. The housing has a bell-shaped top 5 opening into a channel-shaped lower portion 3. The channelshaped lower portion has its edges 9 designed to rest upon the top edge ill of the casing i. The housing is secured in place by end members H. Each end member has laterally extending ears l2, see Figure 4, that enter recesses iii in the nds of the channel portion 8. The end pieces extend down along the sides of the casing as shown in Figure 2', and have openings for receiving screws 14, these screws being threaded into nuts l5, counted in the casing i. In this way, the device is connected to the casing.

The end pieces ll are held against outward movem "15 by a sleeve it that encircles the channel portion 3. and projects a slight distance below the bottom of the housing 5 as shown in Figure 3. In fact, the sleeve i6 telescopes slightly over the end of the casing l. The parts are securely held to the casing in this manner and yet they may be quickly removed therefrom, if desired.

Within the housing 5, I mount a reciprocating member ll. member has a carriage l3 slidably. mounted in the channel 5. The carriage carriesan upper set of ball-bearings 19. It will be noted from Figure 3 that the upper set of ballbearin s i9 ride on the inner surface of the channel-shaped member 8 and thatthe lower set of ball-bearings 2% ride in grooves 21% formed in the inner surface of the channel-shaped portion 8. The lower set of ball-bearings are. arranged inltwo pairs and the ball-bearings in each pair are spaced from each other by cylindrical members 22'. The lower set of ball-bearings not only act as an anti iricticn support forthe carriage l8, but they also hold the carriage against movement in a direction parallel to the motor shaft axis.

The end pieces ll carry cylindrical projections lie that extend into the cylindrical passageway iormedby the grooves 2| in thechannel-shaped member. 8 andin. the grooves 2'3-in the carriage.

Theproje'ctions or pins lla hold the carriage against transverse movement while permitting it to move in a longitudinal direction.

The reciprocating member I! carries a tongue 24 that projects through the opening la in the bell 1. A base member 25 for a safety razor head has a cup-shaped portion 25a movable over the outer end of the tongue and secured thereto by a screw 26. The base member carries a razor blade guard 21 that may be either integral therewith or secured thereto by screws 27a. This guard has the usual convex portion against which a safety razor blade 28 is held by means of a clamping head 29. In place of the usual comb teeth disposed along the opposite sides of the guard, I provide cylindrical members 30 that will offer a smooth surface against which the skin may contact. The cylindrical members 30 are spaced from adjacent edges 3! and this provides longitudinal slots 32, see Figure 1, through which the cut beard and soap may pass.

The razor blade head 29 is removably secured to the blade guard 27 by pins 33 that extend through openings 34 in the blade 28 and through openings 35 in the blade guard 27. The pins 33 are in turn provided with openings 36 for removably receiving a locking pin 31. 38 on the pin 3'! causes the rounded shank of the pin to pass through the openings 36 and to lock the razor head 2'9 in place. A U-shaped spring 39 extends from the base member 25 and is yieldingly received in a groove 40 formed in the pin 3'.

In order to prevent water or any other liquid from gaining access to the moving parts, I provide a rubber sleeve 4! 24 and is secured thereto by any means such as a string Ma. The opposite end of the sleeve 4| is passed over the bell-shaped end 7 of the housing 6 and the tendency of the sleeve to contract is sufficient to frictionally hold the sleeve in place. It will be noted from Figure 2 that the sleeve pro- J'ects up into the cup-shaped portion 25a and therefore the opening 1a is entirely closed from water.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

The razor blade is secured in place in the manner already described, and the device is now ready to function. The two sets of ball-bearings I9 26 are preferably packed in grease so that they will operate for an indefinite period of time without any need of attention. The motor shaft 5 has aneccentric portion 5a that is received in a slot 42 formed in the bottom of the carriage IS. The rotation of the shaft 5 will cause the eccentric portion 5a to move through a circle and in turn to oscillate the carriage l8. This oscillation is transmitted to the safety razor head assembly through the tongue l'a' and therefore the head and and blade will oscillate or reciprocate as a unit and with respect to the casing I. The rubber sleeve 4! permits relative movement between the base member 25 and the housing 6 and also prevents water from entering the parts. A far closer and more eflicient shave is obtained by a rapidly reciprocating blade. A blade may be used for a longer period of time because of this rapid reciprocation and the skin will not be torn and scratched which usually results when a safety razor blade is moved directly over the skin without being reciprocated.

The device may be placed under a water faucet for cleaning after the shaving operation, without any harm resulting to the moving parts. The

that surrounds the tongue blade may be removed and dried and then again secured in place or a new one may be substituted therefor, if desired.

In Figure 6 I show the top of the carriage l8 and it will be noted that ball bearings l8 are mounted in recesses in the top. Figure 2 shows the ball bearings l8 riding on the upper inner wall of the channel shaped portion 8. The carriage is yieldingly urged in an upward direction by coil springs 8' that are disposed between the top edge it of the casing l and the underside of the carriage.

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1. In combination, a casing adapted to be held in the hand, a housing carried by the casing, a carriage disposed in the housing, anti-friction means for supporting the carriage and permitting including a guard, a blade, and a head;

assembly including a tongue reciprocably carried and having a cup-shaped end receiving theouter end of the tongue, and a water-proof flexible closure enclosing the tongue and being secured to the tongue portion received in the cup-shaped end to make a water-tight fit with the closure also making a water-tight fit with the an apron for protecting secured to the tongue.

4. The combination with a motor casing; a housing rigidly secured thereto and having a guide extending a razor blade assembly rigidly secured to and entirely supported by the member and being reciprocated thereby; said assembly including a in the direction of the length of its cutting edges.

GEORGE E. LA CELL.

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