US2100135A

US2100135A - Electric dry shaver

Info

Publication number: US2100135A
Application number: US82106A
Authority: US
Inventors: Florman Irving
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-05-27
Filing date: 1936-05-27
Publication date: 1937-11-23
Anticipated expiration: 1954-11-23

Description

l. FLORMAN ELECTRIC DRY SHAVER Nov. 23, 1937.

Filed May 2'7, 1956 2 Sheets-Sheet l I Nov. 23, 1937. g, FLORMAN 2,100,135

ELECTRIC DRY SHAVER Filed May 27, 1956 2 Sheets-Sheet 2 v fifV/hg Harman Patented Nov. 23, 1937 UNITED STATES PATENT OFFICE 6 Claims.

I Mv invention relates to shaving devices and more particularly to an electrically driven dry shaver.

A type of dry shaver is well known which consists of a long casing member adapted to be gripped in the hand and having at its end reciprocating blade devices for cutting .the beard. Such devices are unsatisfactory inasmuch as in their operation they must be held in a somewhat awkward position. The awkwardness of the position and the tight grip necessary in the use of such arrangements makes the fingers and .the hand still and makes it difiicuit to manipulate these devices. Furthermore, such arrangements are diflicult to handle where all dlfierent points of the face are to be reached. It also generally requires a considerable period of time to learn their proper operation.

- A further disadvantage of these devices lies in their expense and complicated construction. Furthermore, the razors now on the market require the use of a thumb wheel to impart a starting motion to the motor. The arrangements make a considerable amount of noise, and cause rapid interruptions of the electric current which produce disturbances in neighboring electric circuits, thereby causing difilculties in radio reception.

The object of the present invention is to pro- 39 vide an arrangement which overcomes the above disadvantages. Primarily, I desire to provide a device which can be comfortably and conveniently held in the hand in such a position that shaving may be accomplished without any strain 35- or=unnatural positioning of the hand. Such an arrangement makes it possible to shave without physical strain and to reach any desired part of the body with the razor. The manipulation of the razor is so simple that no experience in operating the same is necessary.

This purpose is accomplished primarily by arranging the driving motor in a casing of proper width to be gripped in the hand, and preferably substantially square, and positioning the cutting members at the side instead of at the end of the casing.

A further object of my invention is to provide a razor or this type using a shaded pole induction type motor which is noiseless, which runs smoothly, and which starts of itself as soon as the current is applied. By the use 01' such a motor the device runs more quietly and does not interfere with any other electrical circuits.

3 Finally, I wish to provide a device which is is inexpensive andeasy to manufacture, and is formed 01' the smallest possible number or parts, so that the device is within the reach of the average user.

Further objects and advantages of the invention will appear more fully from the following 5 description, particularly when taken in conjunction with .the accompanying drawings which form a part'thereof.

In the drawings: Fig. 1 is a perspective view of my device 1 showing it held in the hand of the user.

Fig. 2 is a rear view of the same.

Fig. 3 is a front view of the device with the cutting unit and front casing removed.

Fig. 4 is a similar view with the front casing 15 section in position.

Fig. 5 is a bottom plan view of the shaving unit.

Figs. 6 and 7 are cross sections on the lines fi-S and 8-7 respectively ortFig. 2.

Fig. 8 is a rear elevation of the stationary cut- 20 ting element.

Fig. 9 is a cross section on the line 9-8 of Fig. 7.

Fig. 10 is an enlarged front elevation of the end of the rotor shaft. 2

The arrangement consists essentially of 9. casing A, for holding the driving unit or motor and a cutting unit B. The casing A is preferably substantially square in cross section, as shown, and the cutting unit B is mounted on, and pref- 3o erably near the edge of, one of the square sides. Obviously the shape of the casing may be varied considerably. It should, however, be of such a dimension in a direction parallel to the direction of movement of the cutting members as .to be readily gripped in the hand. Its dimension perpendicular to the cutting plane of the cutting unit should be relatively small, preferably not exceeding about 1 inches, and this should be no greater than either of its other dimensions. Furthermore, in the preferred form the two dimensions in a plane parallel to the cutting plane, or in other words the dimensions of the wall which carries the cutting unit, should be substantially equal. 5

As shown in the drawings, the device comprises a casing formed of a front section 2 and a rear section I adapted to be connected and held together by screws 8. These members thus form a casing having square front and

rear walls

3 and 5. Within this casing is mounted a shaded pole induction motor. This motor comprises a closed masnetl formed of laminated blades each in the shape of a ring. Around one portion of the ring is wound a magnet coil it connected by a cable I2 to a plug l4 which can be inserted into any alternating currentsource outlet. The opposed portion of the magnet is provided with an opening I! in which is arranged the rotor ll of the motor.

It will be noted that the casing sections are provided with bulging portions 28 within which the coil i8 fits when the device is assembled.

Mounted on opposite sides of the armature are two plates 22 which support bearings 24 in which is rotatably mounted the rotor shaft 28. The rear bearing fits in an opening 28 in the rear cas 'ing section 4, while the front bearing extends into- On the end of the rotor shaft 28 and eccentric thereto is a pin 40 on which is rotatably mounted a sleeve 42. This pin and sleeve act as a crank. The cutting element is shown in Figs. 5 to 9.

' It consists of a fixed section 44 and a reciprocating section 46. The fixed section consists of a supporting or base block 48 and a cylindrical portion 50. The cylindrical portion is extremely thin opposite the fixed block 48 and is provided with a series of transverse slots 52 therein.

Mounted in the block 48 and extending within the cylindrical portion 50 are guide members which are threaded in the bottom of the block and are adjustable vertically therein. These members consist of sleeves 5| threadedly adjustable in the base block 48 and having at their outer ends guide slots 53. Pins or rollers 54 are mounted in longitudinal slots 55 in the walls of the sleeves 5i, so that the rollers extend perpendicular'to the slots 53. A plug 56 is threaded in the rear end of each sleeve, and makes it possible to adjust a coil spring 51 to vary the pressure exerted thereby on rollers 54. The sliding member 46 has extending along one side thereof a rib 58 capable of fitting in the grooves 53. The opposite portion of the sliding cutter member fits tightly against the rear, lower or inner face of the stationary member 44. This is also provided with a series of transverse slots 52, parallel to the slots 52.

It is evident that if the cutting mechanism above described is moved across the face in the direction of the slots, or transverse to the length of the cutting member, and the inner blade is reciprocated, the hairs will pass through the slots of the outer blades, and the reciprocations of the inner blade past these slots will cut the hair and remove the same.

The motor shaft 26 extends through an opening 64 in the base block 48 and the sleeve 42 engages in a cutaway portion 60 of the rib 58. It is evident that when the motor rotates and drives the shaftthe eccentric mounting of the pin 48 will cause a reciprocatory motion to be imparted to the movable cutting element 46. By pressing the device against the face, the beard or other hair will be removed.

In order to hold the cutting element in position on the razor, and to prevent removal or loss of the same, the base block 48 is provided with a notch 66 which fits over the ridge 38. A screw 88 threaded in one of the walls 34 is adapted to engage a recess 18 .n the block 48 and thus hold the cutting elem ant in position. It is quite a simple matter, however, to remove the cutting element for cleaning the same by merely loosening the screw 88.

When a razor of this type is used on the face, it must be pressed fairly tightly in order to cut satisfactorily. This tends to press the skin onto the slots and leave ribs or grooves on the surface of the skin. With this razor it is possible to follow the movement of the cutterwith the thumb or one of the fingers tending thus to smooth out and eliminate the effects of the shaving member.

Instead of making the

members

48 and 50 of a single piece of metal, as shown, the parts in which the slots are formed may be stamped out of fiat spring steel. The non-slotted portions may then be die cast, and the slotted portions fastened to the die cast parts. Such an arrangement could be made more economically than the structure above described.

While I have used in the specification and claims the term "cutting plane of the movable cutting members", I mean a plane substantially tangent to the faces of the cutting members which are provided with the slots, or in other words a plane which substantially represents the plane of the surface of the skin when the razor is in use.

While I have described herein some embodiments of my invention, I wish it to be understood that I do not intend to limit myself thereby except within the scope of the appended claims.

I claim:

1. An electric dry shaving device comprising a casing having substantially square front and rear walls and having a thickness less than either of the dimensions of the front and rear walls, the dimensions of said device being such as to permit the same to be substantially confined within the hand of the operator, a cutting arrangement including a pair of relatively movable cutting elements mounted on the front wall of the casing and extending therefrom, the cutting plane of said cutting elements being substantially perpendicular to the least dimension of the casing, said cutting elements extending in a direction perpendicular to the least dimension of the casing and parallel to the wall on which they are mounted.

2. An electric dry shaving device comprising a casing having substantially square front and rear walls and having a thickness less than either of the dimensions of the front and rear walls, the dimensions of said device being such as to permit the same to be substantially confined within the hand of the operator, a cutting arrangement including a pair of relatively movable cutting elements mounted on the front wall of the casing and extending therefrom, the cutting plane of said cutting elements being substantially perpendicular to the least dimension of the casing, an electric motor mounted within said casing, and means connecting the motor to the cutting elements to drive the same, said cutting elements extending in a direction perpendicular to the least dimension of the casing and on which they are mounted.

3. An electric dry shaving device comprising a casing having substantially square front and rear walls and having a thickness less than either of the dimensions of the front and rear walls, the dimensions of said device being such as to permit the same to be substantially confined within the hand of the operator, a cutting arrangement inparallel to the wall betweeru'a vshavingelernent comprising. a base eluding apair, of relatively movable cutting eleblock mounted between said parallel walls, said ments mounted on the front wall of the casing adjacent one edge thereof and extending laterally therefrom, the cutting plane of said cutting elements being substantially parallel to the plane of the front wall, said cutting elements including a stationary element and an element reciprocable in a direction parallel to the adjacent edge, an electric motor mounted within said casing, said motor having a rotor and means to cause rotation of said rotor, a shaft for supporting said rotor and driven thereby, said shaft extending perpendicular to the cutting plane of the cutting elements, and means connecting the shaft to the reciprocable cutting element to drive the same.

4. An electric dry shaving device comprising a casing havingfront and rear walls of substantially equal dimensions in the planes of the walls and having a thickness less than either of the dimensions of the front and rear walls, the dimensions of said said device being such as to permit the same to be substantially confined within the hand of the operator, thelfront wall of said casing having a projection extending therefrom adjacent one edge thereof and in a direction perpendicular thereto, said projection having spaced walls parallel to the adjacent edge extending perpendicular to the plane of the front wall, a shaving element mounted between said parallel walls and having a movable cutting element extending in a direction longitudinally of said parallel walls, an electric motor mounted in said casing, and means connecting said motor with said movable cutting element to reciprocate the same.

5. An electric dry shaving device comprising a casing having substantially square front and rear walls and having a thickness less than either of the dimensions of the front and rear walls, the front wall of said casing having a projection extending therefrom adjacent one edge thereof and in a direction perpendicular thereto, said projection having spaced walls parallel to the adjacent edge extending perpendicular to the plane of the front wall and forming a groove therethe cutting portion of the fixed cutting element and'having slots therein parallel to the first'said slots, an electric motor of the shaded pole induction type mounted in said casing, said motor comprising a magnet frame of substantially ringshaped sectionka coil surrounding one part of said frame, means to connect said coil to. a source of current, a shaft mounted in said magnet frame perpendicular. to the plane of the front wall of the casing,- arotor mounted on said shaft to be driven by said magnet, said shaft extending through said, ca n Wail projection and said opening in said base block, a pin on the end of said 'shafteccentric with respect thereto, and a sleeve rotatably mounted on said pin, said movable cutting element having an opening in the bottom thereof, said sleeve engaging in said opening, whereby upon driving of said motor said movable shaving element is reciprocated with respect to theflxed shaving element. I

'6. An electric dry shaving device comprising i a casing having substantially square front and rear walls and having a thickness less than either of the dimensions of the front and rear walls, the dimensions of said device being such as to'permit the same to be substantially confined within the hand of the operator, a shaving unit mounted on the front wall of the casing and extending forwardly therefrom and within the projection of said wall, the cutting plane of said shaving unit being substantially parallel to the front wall of the. casing.

IRVING FLDRMAN.