US1970518A

US1970518A - Hair clipper

Info

Publication number: US1970518A
Application number: US724588A
Authority: US
Inventors: Aaron Harry
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-05-08
Filing date: 1934-05-08
Publication date: 1934-08-14
Anticipated expiration: 1951-08-14

Description

Aug. 14, 1934. HT-AARON 1,97,518

HAIR CLIPPER.

. Filed May 8, 1954 124- )[wnyAwraW INVENTOR Patented Aug. 14, 1934 UNITED STATES PAT NT; OFFICE My invention relates to improvements in power driven hair clippers and razors. In clippers and razors of the type heretofore used, a face plate having slots therein for the admission of hair is provided with a cutter member slidable there across, whereby the hair admitted in the slot is caught between the cutter and'the face plate to he thereby cut off. The motion of the cutter is usually one of pure translation across the 310 face plate and transversely of the hair to be cut in the slot. The blade cutting edge as it moves into hair cutting position is presented directly against the hair which is non rigid and therefore bendable in the direction of motion 5 of the cutting edge. It is, therefore, impossible in such clippers and razors to truly shear ed the hair which is torn or broken off by the action of the translated cutting edge against the resilient hair with resulting discomfort to the user. For this reason, in these hair clippers and razors, the hair ot be clipped close to the face or body of the user so as to eflect a close shave.

My invention overcomes these inherent disadvantages of other clippers by providing in a slotted cylindrical face applied housing, a cutter member so arranged as to efiect a concurrent angular and tried motion of the ra e as it is presented against the hair which 3Q) has been admitted in the slot. The cutting motion resulting thereby is a-true shearing one and the r admitted in the slot is sheared ed without the application of tension to the hair thereby bling the user to shave closely and without i 35 discomfort.

My invention further contemplates the proi ion of a "m clipper or razor of which is extremely simple in construction and adapted to be cheaply produced, having but a single moving part and which is eflicient in operation and may be applied without the slightest danger and without the aid of shaving soap, cream or other hair softening preparations.

My invention contemplates a provision of a cutting appliance for shaving hair without actually subjecting the surface of the skin to any scraping action of a blade and in which a shear ing action is. effected at the point of contact of thercutting edge by the generation on the cutting edge of a concurrent angular and translated motion, M

Mydnventiori further contemplates the provision of novel means for accomplishing a concurrent motion .of rotation and translation of thecuttingedseofmyhairclipper-sousto the drawing in which, a

set screw 106, engaging the corresponding ineifect a shearing action on the hair admitted in the slots.

The operation of my invention will be clear from the description which follows and from Figure l is an elevational view of my improved razor, partially broken away to disclose the driving means.

Figure 2 is a partial side elevation thereof.

Figure 3 is a partial cross section of the face to applied housing and cutting element taken on the line 3-3 of Figure 1;

Figure 4: is a partial cross section of the face applied housing and cutting element taken along the line of 4-dof Figure 2.

Figure. 5 is a cross section of the housing and cutter member of a modification of my device.

Rel now to the drawing and particularly to Figures 1, 2, 3 and 4, my improved hair clipper is provided with a hollow grip or handle in which is arranged in any suitable manner known in the art and which therefore need not he described, an electric motor, 101, which may be connected to a source of electrical power by means oi the lead wires 102 extending from the lower end of thehandlc. A key way 103 is arranged at the upper end of the handle to receive the hey lot depending from the cylindrical ho 105 and secured thereto by any suitable means, as by the cap screw 123 extending into he the recess 124 on the key and engaging the threaded opening 125.

The housing and cutter assembly are secured in the lreyway in any suitable manner as by theterior screw 126 arranged on the key.

To provide means for receiving the hair and presenting it to the cutting edge of my novel device, the hair admitting slots 107 are arranged on the upper arcua te section of the housing, 5 preferably disposed parallel ,to and equidistantly ofeachother. I

The motor shaft 108 extends upwardly from the motor and is journaled in the'hearing 110. The key is slotted to receive the motor shaft '1 from which the spheroidalcrank pin 109 ex-' tends into the recess 111 arranged on the under face of the tubular cylindrical cutter member 112.

The cutter member-1s journaled eccentrically in'the housing in a manner which will be more fully described, to effect a concurrent angular and translated motion of the said cutter member.- 8umcient clearance is provided between the rounded crank pm 109 and the recess walls so 110 that as the crank shaft is rotated by the motor, the cutting member is urged to oscillate in the journal from the position shown in full lines to the position shown in dotted lines in Figure 3, and concurrently to reciprocate in the journal between the position shown in full lines and that shown in dotted lines in Figure 4.

Referring now to Figure 3, the inner centre 127 of the tubular wall 128 of the cylindrical housing is arranged eccentrically of the outer centre 129 to thereby provide a comparatively thick wall section at that part of the housing adjacent the key and in which the crank receiving slot 130 is arranged. The tubularwall 128 is uniformly and symmetrically tapered circumferentially to provide the comparatively thin wall section on which the hair receiving'slots are arranged. The tubular wall 112 is similarly constructed to provide a comparatively thick wall section at that part in which the crank pin receiving slot is arranged and a comparatively thin wall section adjacent the hair receiving slots.

The, cutter member is journaled in the housing so that the thin wall sections are adjacent each other and the corresponding thick wall sections are adjacent each other.

In operation, the motor rotates the crankshaft and spheroidal pin which urges the cutter member longitudinally and transverly ,of the housing and because of the above described eccentricity between the member and the housing, the member concurrently reciprocates and oscillates in the housing. a

To provide means for clipping the hair, a plurality of parallel cutting edges 113 are arranged adjacent the hair admitting housing slots, on the upper arcuate section of the tubular cutter member equidistant from each other to form the parallel slots 131, through which the cut hair passes to be collected in the bore 132 of the cutter member.

- The cutting edges are so arranged with respect to the plurality of slots on the housing that when the crank pin 110 is at its outer or inner dead centre, the cutting edges are furthest away from the walls of the slot at which time the cuttingedge is also at the non oscillation point of its cycle. When the cutter member is at its maximum point of oscillation the cutting edges are arranged to pass the'walls of the corresponding slots so that the concurrent angular and translated motions are at a maximum when shearing motion takes place as the cutting edge passes the slot opening in which the hair to be cut is admitted.

The slots 10'! are large enough to admit hair but small enough to prevent the passage of skin into them. The housing section adjacent the slots is comparatively thin and the cutter member is arranged in the housing so that they bear against each other in order that the hair may be sheared oiI close to the skin. In order to urge the cutter member against the housing adjacent the slot, spring 121 may be arranged in the recess 122 provided in the housing and which forces the pin 123 against the cutter member thereby resiliently holding the latter against the housing. This spring andpin arrangement automatically. takes up any wear on the members that may result from constant use of my novel device.

I prefer to arrange a pin and spring assembly at each longitudinal end of the housing so. that the cutter member will be symmetrically urged against the housing. I

In operation, as my novel device is passed over the skin of the user, the motor rotates the crank and pin, thereby causing the cutter member to concurrently oscillate and reciprocate in the housing. At the same time, hair is admitted in the housing. slots to be thereby presented to the cutting edges. It will be seen that I have provided a cutting edge which moves in relation to the hair in a combined angular and translated motion thereby accomplishing the true shearing motion of a scissors. It will be apparent that the hair to be cut is under no tension so that it is not broken or pulled off, as in hair clippers of the type heretofore used, since the cutting edge is not directed transversely of the hair to be cut.

- The combined angular and translated motion of the cutter may be accomplished in various other ways as for example in the manner disclosed in Figure 5 in which the cutter member 115 is journaled .in the housing 120 which is provided with the longitudinal recess 116 arranged to receive a crank pin 117. Upstanding from the housing is arranged the pin 118 extending into the oblique cam slot 119, circumferentially arranged on the cutter member. In operation the crank pin is rotated as heretofore described and moves transversely in the slot 116 to reciprocate the cutter member. The pin 118 guides the slot 119 to accomplish a concur,- rent oscillatory motion of the said member in the housing.

If desired the motor, in this modification, may be substituted by the ordinary vibrator which no is wellknown in the art and which need not be described in detail. Such vibrators accomplish only a reciprocatory motion of the cutter member, the pin and oblique slot heretofore described eiIecting a concurrent oscillatory motion of the said member.

-It will be seen that I have provided a hair clipper and razor in which the cutter member shears off the hair in a novel manner without the aid of soap or other hair softening prepara- 120 tions by positively and directly urging the cutter member to oscillate and reciprocate in the housing.

It will be further seen that I have'provided a device that is simple in construction and cheap to manufacture.

- I claim:

1. In a device of the'character described, a housing provided with a plurality of slots, a cutter member operatively journaled in the housing and means for positively and directly oscillating and reciprocating the member in the housing.

-2. In a device of the character described, a housing, a cutter operatively mounted in the housing and means for positively concurrently efi'ecting angular and lateral motion of the cutter in the housing including a motor, and a spheroidal pin operatively secured thereto, said pin operatively engaging the cutter.

3. In a device of the character described, a slotted cylindrical housing having a longitudinal bore, a cutter .member operatively Journaled therein, and means forv positively and directly urging the member to concurrently oscillate and reciprocate in the bore.

- 4. In a device of the character described, a housing, a cutter operatively mounted in the housing and provided with a cam slotand means for eflecting positive concurrent angular and till lateral motion of the cutter in the housing including a pin in the housing engaging the slot, and motor driven means for displacing the cutter in the housing.

5. A hair cutting and shaving device comprising a slotted housing having a longitudinal bore, said housing having a comparatively thin wall 'section adjacent the slots and a comparatively thick wall section in opposed relation thereto, a cutter member operatively joumaled in the housing and means for positively and directly efiecting compound motion of the member in the housing.

6. A tonsorial device comprising a slotted tubular housing, said housing having a comparatively thick wall section tapering circumferentially in a comparatively thin wall section adjacent the slots, means for cutting operatively arranged in the bore and means for positively" and directly effecting compound motion of the cutting means in the housing.

7. A tonsorial device, comprising a housing, a tubular cutting member operatively arranged in the housing and means for positively and directly effecting combined lateral and angular motion of the cutting member in the housing.

8. In a device of the character described, a housing, a cutting member operatively arranged in the housing and having a plurality of cutting edges disposed thereon, and means for positively eflecting concurrent lateral and angular motion or" the member in the housing.

9. In a device of the character described, a housing, a cutter member having a longitudinal bore operatively journaled in the housing, a plurality of spaced cutting edges arranged on the member, said member having a plurality of slots spaced between the cutting edges and extending to the bore and means for positively edecting combined lateral and angular motion of the cutting member in the housing.

10. .In a device of the character described a housing, a cutting member eccentrically journaled in the housing, and means for positively concurrently oscillating and reciprocating the member in the housing.

11. In a device of the character described, a housings. tubular cutting member operatively arpanged in the housing, said member having a comparatively thin peripheral wall section and a comparatively thick wall section in opposed relation thereto and means for positively cheeting compound motion of the member in the housing.

12. A tonsorial device, comprising a slotted cylindrical housing provided with a longitudinal bore, said housing having a comparatively thin wall section adjacent the slots and a comparatively thick wall section opposed thereto, and a tubular cutter member, and a plurality of cutting edges disposed on the member, said member having a comparatively thin wall section adjacent the cutting-edges and a comparatively 1 thick wall section opposed thereto, said member operatively arranged for positive concurrent angular and translated motion in the housing with the cutting edges adjacent the slots.

13. A hollow handle enclosing a motor, a. cylindrical housing secured to the handle, and provided with a'plurality of slots disposed in spaced relation thereon, a cylindrical tubular cutting member journaled in the housing and provided with a recess, a plurality of spaced cutting edges disposed on the member, and arranged adjacent the slots, a crankshaft operatively connected to the motor, and a crankpin thereon extending into the recess and adapted to, positively simultaneously oscillate and reciprocate the cutting member.

14. In a device of the character described, a cylindrical housing provided with a plurality of spaced slots, a cutter member journaled therein and arranged for oscillation and reciprocation relative thereto and means for positively and directly urging the member to oscillate and reciprocate in the journal.

15. In a device of the c cter described a cylindrical housing'having a slot disposed thereon, a cutter member provided with a cutting edge arranged on the outer surface thereof. adjacent the slot, said member journaled in the housing, and means for actuating the cutter member, whereby the cutting edgeis positively and directly simultaneously rotated and translated relatively of the slot.

316. In a device of the character described, a lid housing, a cutter member operatively arranged in the housing and provided with a recess, a spheroidal pin extending into the recess and of dimension smaller than the recess and driving means operatively connected to the pin whereby i211) the cutter member is positively urged to oscillate and reciprocate in the housing 17.1121 a device of the character described, an oscillating longitudinally movable cutting member, a concentric housing'associated therewith, and means for actuating the cutting member in the housing, whereby the cutting member is urged to positively and directly simultaneously oscillate and reciprocate in the housing.

HARRY AARON.

HSLAHMER 1,970,518.-Harry Aaron, New York, N. Y. HAIR CLIPPER. Patent dated August 14, 1934. Disclaimer filed February 8, 1941, by the inventor.

Hereby enters this disclaimer to claim 13 of said patent.

[Ofiic'ial Gazette March 18, 1941