US1533654A - Motor-operated razor - Google Patents

Description

April 14, 1925.

L. A. MAYNARD' MOTOR QPERATED RAZOR Filed March 13 1924 fet Patented Apr. 14, 1925i.

UNITED STATES LAUBIER A. HAYN'ARD,

0F DE'QROIT, MICHIGAN.

MOTOR-OPERATED Application filed March 13, 1924. Serial No. 899,050.

To @ZZ 'whom t may concern.'

Be it known that I, LAURIER A. MAYNARD,

a citizen of the United States, residing at Detroit, in the county-of 'Wayne and State of Michigan, have invented certain new and useful Improvements in Motor-Operated Razors, of which the following is a speciiication, references being had therein to the accompanying drawings.

rllhis invention relates to motor operated razors and my invention aims to provide a novel power transmission mechanism by which a razor blade may be -rapidly reciprocated from the power provided by an electric motor or other source .of power to which the power transmission mechanism is articulated so that the razor may be freely manipulated relative to a face.' It is in lthis connection, that the power transmission mechanism is housed within ahandle member of the razor `and provision is made whereby easy access may be had to the transmission mechanism for lubricatingor repair purposes.

My invention further aims to provide a x power razor wherein a driven cam is adapted to oscillate crank shafts and cause said shafts to osoillate or reciprocate a razor blade 'which is provided with a yieldable guard adapted to contact with the face and crowd the flesh head of the blade so that' the flesh will be stretched to facilitating the cutting of hair by the razor blade.

My invention will be hereinafter specically described in the claims, and reference will now be had to the drawing,

wherein- Fi re 1 is a side elevation of the razor showing the handle portion thereof in longitudinal section;

Fig. 2 is a plan of the razor partly 1n section on the line II-II of' Fig. 1;

Fig. 3 is a cross sectional View ofthe razor taken on the line III-III of Fig. 1;v

Fi 4 is a similar view taken on the line IV- V of Fig.' 1;

Fig. 5 is a slmilar view taken on the line VV-V of Fig. 1;

Fig. 6 is a, view of the outer end of the razor blade showing the guard;

Fi 7 is a erspective view of a detached coup ing mem er, and

Fi 8 is a perspective view of a detached double crank.

In the drawing, the reference numeral 1 denotes an oblong handle provided with a.

anti-frietional bearing 'finger ring or hole 2, and said handle is substantially. hollow with the upper portion thereof affording a barrel 3 and the lower portion thereof a casing 4, said casing having adetachable side wall 5 that may be held in place by screws 6.

The outer end of the handle or barrel is provided with a detachable screw plug 7 that may be held against accidental rotation by a set screw 8 and in said plug is an 9, in the form of a ball for the enlarged end 10 of a driven cam shaft 11 which is journaled in a bore A12 formed in .the inner end of the handle 1.

The bore 12 1s enlarged to receive a sleeve 13 held in place by a set screw 14 and mounted in the sleeve is the iexible casing 15 of' a flexible drive shaft 16 suitably connected to the cam shaft 11, as at 17. The flexible shaft 16 is adapted to be driven fromv an electric motor or other source of power with the casing 15 of sufficient length to permit of the handle l being freely ma` nipulatd relative to the source of power.

The handle 1 at the bore 12, has an annular recess 18 for anti-frictional bearings 19, preferably balls, against which bear a collar 20 on the cam shaft 11, so that the l anti-frictional .bearings 19 may cooperate with the bearing 9 in holding the. cam shaft against anyend thrust or longitudinal move-A ment.

Mounted in the detachable side wall 5 andV 26 of a two-part coupling member 27 which has its parts connected together by a. set screw 28. The parts of the coupling member are formed with recesses 29 for antifrictional bearings 30 and extending between said 'anti-frictional bea-rings is a disk or cam 31carried by the cam shaft 11. The cam is in the form of a disk set at an angle, other than a right angle, to the cam shaft 11 whereby the disk will serve as a, cam when Athe shaft 11 is driven, thus causing the coupling member 27 to be shifted back and forth to im art a rocking movement to the double cran s 22.

The outer end wall of the casing 4 has an opening 32 and extending through said opening into the casing 4 is the vshank 33 of a.

las

sanitary razor blade 34. The shank 33 is pivotally mounted between the arms 24 of the double cranks 22 by ins 35 and in consequence of this connection the blade 34 may have a reciprocatory movement imparted thereto from the driven cam shaft 11. The blade 34 is of a conventional form that may be stropped, but I equip said blade with a guard 36 disposed parallel tothe cutting edge of the blade and Iadapted to swing to either side of the plane of said blade. The guard is-in the form of a rigid piece of wire having its outer end provided with a pintle 37 loosely mounted in a bracket 38 attached to the back of the blade 34 by a set screw 39 or other fastening means.

On the shank 33, adjacent the end of the blade 34 is a strap 40 embracing the shank 33 with inturned lugs 41 extending 'underthe shank and retained in engagement therewith by a bracket( 42 and a set screw 43. The strap 40 also has resilient opposed arms `44 between which extends the inner angular pintle end 45 ofthe guard 36-with the pintle oosely mounted in the bracket 42 which cooperates with the bracket 38 in pivotally supporting theguard. so/that by pressure it may be swung to that side of the razor blade. The resilient arms 44 hold the guard 36 normally in the plane of the blade 34, as best shown in Figs. 5 and 6, but when the razor blade isgplaced against the face the guard is swungout of the plane of the blade and stresses the resilient arm 44 which it engages. This particularly stressed resilient arm will produce a pressure on the guard against the face and consequently as the razor blade'is advanced over the face the uard will crown the iiesh head of the hanle and edge of the razor blade, smoothing out the skin so that the reciprocatory blade may readily attack the hair on the face. Assuming that the blade is reasonably sharp it is obvious that its fast motion will cause hairs -to be quickly severed and the guard 36 will contribute towards a close shave.

From the foregoing it will be observed that I have housed within the razor handle a compact p'wer transmission mechanism by which a rotary motion may be converted into a reciprocatory motion, thus causing the razor blade to be driven and reciprocated from a flexible power shaft. By removing the detachable side wall the mechanism can be lubricated and maintained in an operatable condition and since such mechanism is at a oint remote from the blade 34 there is no anger of the mechanism becoming unor interfering with stropping of the razor blade. Then again, the power transmission mechanism is such that the razor blade is not exactly reciprocated in a linear direction but describes an arc which approaches the sweeping action of drawing a razor blade over the face. This is a thing desired in connection with anygpower razorl 1. In a power razor, a handle, a razor blade having a shank extending into said handle, a flexible shaft extendinglintf` said handle, and power transmission mechanism 1n said handle operated from saidilexible vshaft and adapted to oscillate said razor blade, said power transmission means including a cam shaft, cranks supporting the f,

razor blade shank, and a coupling memb'er articulating said cranks and actuated by said cam shaft.

2.. Means for reciprocating a` razor blade having a shank, comprising crank shafts supporting the blade by its shank, a coupling member articulating said crank shaftsand means engaging said coupling member to cause oscillation thereof.

3. Razor blade -reciprocating means as called for in claim 2, wherein the last mentioned means includes adriven cam shaft.

4. Razor blade reciprocating means as called for in claim 2, wherein said coupling member contains anti-frictional bearings' and the last mentioned means extending between said bearings.

5. A power razor comprising a. casing, a.

blade having a shank extending into saidl casing, -a barrel adjoining said casing, a drlven cam shaft extending into said barrel, and means in said casing supporting the shank of said blade and actuated from said cam shaft adapted for reciprocating said blade.

6. A power razor as called for in claim 5, wherein said means includes cranks connected by a coupling member actuated by said cam shaft.

7. A power razor comprising a handle, a. driven shaft extending into the inner end of said handle, a blade having a shank extending into the outer end of said handle and parallel with said shank, and spaced apart rocking means in said handle solely1 supporting the blade shank and articulating said shaft and blade shank so that said shaft may cause oscillation of said blade.

8. In a power razor, a handle, a blade having a vshank extending into said handle, and

wer transmission means in said handle articulated with said blade shank-for causing III lll

lll

CII

l un oscillatory movement of said blade, said power transmission means including double cranks supporting saidblade shank 9. A power razor eonlprising a handle, a blade having a shank in said handle, a power shaft extending into said handle parallel to the blade shank, a power transmission means between said power shaft and said blade shank to support and guide the movement-.of the entireblade and shank in similar arcuated paths of like amplitude.

10. A power razor comprising a handle, a blade having a shank in said handle, a

power shankextending into said handle and adapted to transmit power to said blade shank, and means effecting an endwise motion of the blade'tlirough an arc with vthe lin presence of two witnesses.

LAURIER A. MAYNARD.

Witnesses:

LEWIS E. FLANDERS, ANNA M. DoRR.

Images