US2331417A

US2331417A - Shaving device

Info

Publication number: US2331417A
Application number: US393445A
Authority: US
Inventors: Naegeli Rudolf
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-05-22
Filing date: 1941-05-14
Publication date: 1943-10-12
Anticipated expiration: 1960-10-12

Description

Get. 12, 1943. R. NAEGELI SHAVING DEVICE Filed May 14, 1941 2 Sheets$heet 1 Oct. 12, 1943 Y R. NAEGELI 2,331,417

SHAVING DEVICE Filed May 14, 1941 2 Sheets-Sheet 2 INVENTORJ 5 22 Patented Oct. 12, 1943 SHAVING DEVICE Rudolf Naegeli, Bern, Switzerland Application May 14, 1941, Serial No. 393,445 In Switzerland May 22, 1940 12 Claims. (01. 30-43) This invention relates to razor and hair clippers of the power driven type in which the actuating motor is positioned within the handle and in which said motor is provided with an actuating connection to a rotatable razor blade, protected by a cover, which razor blade may be applied to the face of the user or to other parts of the body to remove hair.

The invention particularly relates to such devices where an eccentrically disposed razor blade arranged between holding and protecting elements travels with withholding and shearing edges directly over the skin. The shearing edge of the razor blade operates on a stationary holding plate having edged holes or recesses arranged as withholding devices for skin and hairs in the path of the razor blade and located inside of a border of a stationary plate to the efiect that the skin shall be well supported by the continuous border of the holes and the hairs extending into the holes shall be caught and prevented from being pushed back by the blade.

A further object of the invention is to have a shaving device with a rotatable, axially adjustable shaving blade, which is kept continuously and resiliently in close contact with said holding plate and after removing the cover may be lifted up by an ejecting member and be removed for an exchange.

Another object of the invention is to combine the shaving tool with a reciprocating hair cutting device and to shift its moving cutting comb to and fro upon the stationary comb of the hair cutting device either at acute angles or parallely.

With shaving implements of the kind described it is: possible to shave either dry or wet even by using soap or cream. The annexed drawings represent several embodiments of the invention as examples.

Fig. l is a longitudinal section through the head of the handle of the device.

Fig. 2 a lateral view of said head and Fig. 2a a sectional view,

Fig. 3 is a plan of the shaving device,

Fig. shows the head seen from beneath.

Fig. 5 is a longitudinal section across the head of a shaving device combined with a hair cutting device.

Fig. 6 is a. plan of Fig. 5 and Figs. 7 to 9 are plans showing various forms of blades.

Similar letters of reference indicate similar parts.

Figures 1 to 3 of the drawings show a shaving device having a hollow round head A to which the shaving tools B are removably attached. An

'electro motor D and a handle C are connected to head A. A free space F is left between the outside diameter of the stator of motor D and the inside diameter of the handle C as air circulating and cooling means. The air is admitted at the bottom of handle C and leaves the handle casing at the slots G. Head A and handle C are preferably made of Bakelite or another suitable material. The shaving tools B are made of hard noncorrosive steel or may be protected against corrosion by coats of nickel or chrome.

A plate l provided with holes or excavations 3 arranged concentrically to the plates outer edge 2 and to the handles axis and serving as holding elements for hair and skin is bolted to the head A. Plate l is machined plane on its uper side and the upper edge of its outer border is acute-angled to be adapted to lift up the hairs when having the apparatus traveling over the,

skin. Shoulders 6 arranged diametrically opposite each other are provided on the side borders of the head A to assure the exact position of the plate with respect to the shaft 5 of the motor 6. Plate 5 possesses at its center a central opening 8 through which the carrier head 8 fast to shaft 5 of the motor is extended. This carrier head carries on its upper face a cylindrical pin 9 coaxial with the motor shaft and besides this pin a second eccentrical pin it. The blade H is a circular disk provided with a conical and downwardly directed cutting edge l2. It possesses two square holes symmetrically arranged with respect to its center being the same distance from each other as pins 9 and ill. It is stuck with its holes over the said pins assuming its relative position to the center. Thereby it takes an eccentric position with respect to the motor shaft and swings around this shaft when this shaft is rotated. The diameter of its circumferential edge is such, that this edge in its extreme position overlaps the outer edges of the holes 3 so as toenclose and cut the hairs extended into said holes. If the blade is circular it must be fastened to the motor shaft eccentrically to its axis, so that it can a1- ternatingly overlap and uncover the holes 3 of plate l, which receive the hairs. As shown by Figures 7 to 9 the blade may also have other forms digonous, elliptic or be provided with teeth and be centrically arranged to the motor shaft, whereby the holes of the stationary plate 8 will be overlapped and be freed again. There is a cover 53 over the blade it having on two opposite sides lugs It by means of which it is clamped fast to the noses E5 of the head A. On both sides of the cover there is a web i6 by which it rests on the head A such that the space between cover l3 and plate I remains always the same. There are also between pins 9 and I downwardly directed pins I! fast to cover l3 which bear upon the flat middle portion of blade ii to maintain the blade in close contact with plate i during its circular movement, so that an effective cutting off of the hair will be obtained between the blade edge i2 and the sharp edges of holes 3. Bythese holes 3 not only the hairs projecting into the same are held fast but also portions of the skin having the size of the holes. These portions are momentarily rigidly fast in front of the cutting edge so that the hairs may be shaved off flush with the skin rfac In a groove of one of the ears l8 of the head A between two of the noses l there is an eiector arm 19 which may be swung around a stem 20 provided with a lever arm 2| extending under the blade II. By swinging the ejecting arm 19 away from the stop 22 in Fig. 3 lever arm 2| will lift the blade on one side and remove the same from the pins 9 and I0 to have it exchanged.

The motor shaft 5 is lodged in the bearing 23 in the head A. This shaft carries a fan 23a providing circulation of the air within the head A of the handle C.

With a view toward regulating the speed of the motor shaft 5 and the eccentric cutting edge a regulating ring 24 provided with two handles 25 is arranged in the lower portion of the head A. This ring has two downwardly extended cams 26 which bear against the end portions of a flat spring 21 while the middle portion 28 of the spring bears against a disk 29 fast to the motor shaft 5. By a turn of the handles 25 spring. 21 may be bent more or less and thereby the friction between disk 29 and spring portion 28 be varied accordingly and also speed of the motor shaft 5 and the cutting blade ii. The lower portion of the head A as shown in Fig. 4 possesses two members E arranged opposite each other and concentrically with respect to the shaft 5. These are spaced from each other and provided with outside threads for the inside threads of handle C. The stator of the electromotor D bears against said members E and is held fast by the same by bolts.

The Figs. 5 and 6 represent another embodiment of the invention. This rotatable shaving implement is combined with a reciprocating hair cutting device in one and the same instrument and head A.

Here a plate 30 is fastened to the head A by screws 3|. Said plate is stationary and circular on one side at 32 and is provided therewith the holes 33 of any suitable form serving as holding means. The opposite side of the plate is straight lined at 34 and is provided with a row of cutting teeth 35. Above the plate 30 there is as in the here above described embodiment a circular blade ll arranged eccentrically with respect to shaft 5 and put into a circular movement by means of the head 8 fast to the motor shaft and the pins 9 and I0 engaged into holes of the blade. A cover l3 protects the blade II and is clamped fast to four noses l5 of the head A arranged opposite of each other. Pins are provided on said head engaged between the pins 9 and I0 and adapted to maintain blade ii in close contact with plate 30, so that the cutting edge l2 of the blade effects an exact cut of! with the edges of the holes 33 and shaves off any hairs extended into the holes. The cover extends on the dividing line between the hair cutting and the shaving side and is bevelled oi! towards both sides.

The ejecting of the shaving blade I I is effected with the aid of a flat spring 31 arranged in the central bore 36 of the head A and capable of being slid upwards by means of a knob 38. Said spring extends under blade H and permits the lifting off of said blade from the

pins

9 and 10 after the cover has been removed. Having removed the blade Il said spring is slid back again so that it does no more project over the surface of plate 30.

Underneath plate 30 and guided in slots 42 by

pins

39 and 40 fast to said plate is a movable combing plate 4! provided with cutting teeth on its front side. These teeth cooperate with the cutting teeth of plate 30. Combing plate 4! carries also on its opposite side two legs 43 between which is located an eccentric disk 44 fast to head 8. The eccentric disk is eccentric with'regard to the motor shaft 5 and to pin 9 and is moved slidingly around shaft 5 while combing plate 4| is reciprocated. Flat springs 45 are arranged on

pins

39 and 40 and may be bent by means of nuts 46. Thereby a pressure may be produced upon the movable combing plate and the friction may be varied btween the two

plates

30 and 4| thus permitting the regulating of the speed of the moving parts within certain limits. Besides as in the embodiments according to Figures 1 and 2 a fan 23a on the motorshaft and a regulating ring 24 with handies 25 may be provided for the earns 26 of said ring bearing on a spring 21 the median portion 28 of which is in frictional contact with a stationary brake disk 29. By regulating said ring 24 with the handles 25 the pressure upon the brake disk may be increased or decreased and thereby the speed of the motor be regulated.

According to Fig. 7 the blade may be shaped as a symmetric digone which is oncentrically attached to the end of the motor .iaft.

Figs. 8 and 9 show forms of blades which are attached to the head and arranged eccentrically with regard to the motor shaft. The blade according to Fig. 9 is provided with teeth.

The presented embodiments show devices with blades driven directly by the motor shaft. The blades having a continually edge. It is a matter of choice that the blades can also have a toothed edge. Also the driving of the blades could be effected by gear wheels, worms or frictional gear without departing from the scope of the invention.

It is understood that the features herein described may be modified in many instances and changes in construction may be made by those skilled in the art without departing from the general broad scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a shaving device of the power driven type in combination, a stationary plate having a laterally closed at least partly curved, protecting rim and a central opening, a rotary razor blade having an eccentrically positioned cutting edge overlying said rim of the stationary plate, means on said rim for withholding the skin with the hair to be cut, and means for maintaining the edge of the razor blade in close contact with the rim of the stationary plate.

2. In a shaving device of the power driven type in combination, a stationary plate head having two digonal ears and having a tubular shank, a handle casing secured to the shank, a stationary plate having a laterally closed at least partly curved protecting rim provided with holes and recesses and a central opening, said plate mounted on said head, a rotary razor blade having an eccentrically positioned cutting edge overlying said rim of said stationary plate, means for carrying the razor blade and means for maintaining the razor blade in close contact with the rim of the stationary plate.

3. In a shaving device of the power driven type in combination, a stationary circular plate having a laterally closed protecting rim with holes and recesses and a central opening, said holes and recesses having acute edges for withholding the skin with the hair to be cut located inside of a skin protecting border, a rotating razor blade having an eccentrically positioned cutting edge overlying said rim and overlapping some of said holes and recesses of said stationary plate successively cooperating with the edges of said holes and recesses, a carrier head for the blade having pins for carrying the razor blade and extended through the central opening, a cover arranged over said blade and stationary plate, members fast on the inside of said cover for maintaining the edge of the razor blade in close contact with the rim of the stationary plate.

4. In a shaving device of the power driven type in combination, a plane stationary circular plate having a laterally closed protecting rim provided with holes and recesses and a central opening, said holes and recesses having acute edges for withholding the skin with the hair to be cut, located inside of a. skin protecting border, an apertured rotating razor blade having an eccentrically positioned cutting edge overlying said rim and overlapping some of said holes and recesses of the stationary plate and cooperating successively with the edges of said holes and recesses, a carrier head having pins projecting into the apertures of the razor blade for carrying the razor blade and also provided with a groove, a cover arranged over said razor blade and stationary plate, pins fast to the inside of said cover for maintaining the edge of the razor blade in close contact with the rim of the stationary plate, a lever with stem and ejecting arm lodged in the groove of the head, and the ejecting arm being extended underneath the razor blade for e ecting the razor blade after removal of the cover.

5. In a shaving device of the power driven type in combination, a plane stationary circular plate having a laterally closed protecting rim provided with holes and recesses and a central opening,

said holes and recesses having acute edges for withholding the skin with the hair to be cut, located inside of a skin protecting border, an apertured rotating razor blade having an eccentrically positioned edge overlying said rim and overlapping some of said holes and recesses of the stationary plate and successively cooperating with the edges of said holes and recesses, a carrier head having pins projecting into the apertures of the razor blade for carrying the razor blade and also provided with a groove, a cover arranged over said razor blade and stationary plate, pins fast to the inside of said cover for maintaining the edge of the razor blade in close contact with the rim of the stationary plate, a lever having stem and an ejecting arm lodged in the groove of the head, the arm being extended underneath the razor blade for ejecting the razor Ill blade after removal of the cover, a rotary ring with diagonally positioned handles inserted between the head and handle-casing, said handles extended to the outside of the'handle-casing, downwardly directed cams on said ring, a supporting shaft for the carrier head and blade, a disk on the said shaft and a flat spring having \a central part in frictional contact with the disk and adapted to regulate said frictional contact and the speed of'the device.

6 In a shaving device according to claim 5, in which the razor blade is provided with a toothed cutting edge and is eccentrically arranged on the supporting shaft.

7. In a shaving device according to claim 5, in which the razor blade is of digonous form and is centrically attached on the supporting shaft.

8. In a shaving and hair cutting device of the power driven type in combination a stationary plate provided with a partly curved and partly laterally closed protecting rim and a partly toothed straight rim and a central opening, a rotary razor blade having an eccentrically positioned cutting edge, overlying said rim of the stationary plate, means on said rim for withholding the skin with the hair to be cut, a reciprocating movable toothed plate with a straight rim cooperating with the teeth of said stationary plate, means for guiding the movable plate on the stationary plate, and means for maintaining the edge of the razor blade in close contact with the rim and the movable plate in close contact with the toothed part of the stationary plate.

9. In a shaving and hair cutting device of the power driven type in combination a stationary plate head having two diagonally arranged ears and a slot, a tubular shank extending from the head, a handle-casing secured to the shank, a plane stationary plate having a partly curved and partly laterally closed protecting rim and a partly straight toothed rim and a central opening, the curved rim having holes and recesses provided with acute edges for withholding the skin with the hair to be cut, a rotary apertured razor blade having an eccentrically positioned cutting edge overlying said rim and overlapping some of said holes and recesses of the stationary plate, a reciprocating movable plate with cutting teeth on a straight line slidably arranged with respect to the stationary plate, a supporting shaft, a carrier head having pins projecting into the apertures of the razor blade on the upporting shaft for carrying the razor blade, an eccentric on the same carrier head and moved by the same supporting shaft for reciprocating the movable plate, a cover resiliently clamped on said ears of the head, pins fast to the inside of said cover for maintaining the edge of the razor blade in close contact with the rim of the stationary plate, a sleeve shaped spring arranged in the central bore of the plate head and extended underneath of the razor blade and a knob attached to said spring arranged to slide in the slot in the head for ejecting the blade after removal of the cover.

10. In a shaving and hair cutting device of the power driven type in combination a stationary plate provided with a partly curved and partly laterally closed protecting rim and a partly toothed straight rim and a central opening, a rotary apertured razor blade having an eccentrically positioned cutting edge, overlying said rim of the stationary plate, means on said rim for withholding the skin with the hair to be cut, a reciprocating movable toothed plate having a straight rim cooperating with the teeth of said stationary plate, means for guiding the movable plate on the stationary plate, and means for maintaining the edge of the razor blade in close contact with the rim and the movable plate in close contact with the toothed part 01 the sta= tionary plate. a main supporting shaft, a centrally bored carrier head having pins projecting into the apertures or the razor blade and mounted on the supporting shaft for carrying the razor blade. said bored head having opposed ears and a slot therein, an eccentric on the same carrier head and moved by the main supporting shaft for reciprocating the movable plate, a cover reslliently clamped on said ears of the head, pins fast to the inside of said cover for maintaining the edge of the razor blade in close contact with the rim of the stationary plate, a sleeve shaped spring arranged in the central bore of the head and extended underneath ot the razor blade and a knob attached to said spring arranged to slide in the slot in the head for ejecting the blade after removal of the cover, a rotary ring with diagonal- 1y arranged handles inserted between the head and handle casing, said handles extended to the outside of the handle-casing, downwardly directed cams on said ring, a disk fast on the main shaft and a flat spring having a central part on frictional contact with the disk and adapted to regulate said frictional contact and the speed of the device.

11. In a shaving and hair cutting device according to claim 10, in which the razor blade is of circular form and provided with teeth and is eccentrically attached on the supporting shaft.

12. In a shaving and hair cutting device according to claim 10, in which the razor blade is of digonous form and is attached on the axis