US2329891A - Attachment for electric razors - Google Patents

Description

Sept. 21, 1943. .1. E. GANTNER 2,329,891

ATTACHMENT FOR ELECTRIC RAZORS Filed July 10, 1942 2 Sheets-Sheet l 5 5 i 22 1' 2'5 17 2O 3o 26 ii A ,3;

Sept. 21, 1943. J, E. GANTNER ATTACHMENT FOR ELECTRIC RAZORS 2 sheets sheet 2 Filed July 10, 1942 .Patented Sept. 21, 1943 H it.

6 Claims.

My invention relates to a rocking motion for electric razor and I declare the following to be a full, clear, concise and exact description there of sufficient to enable anyone skilled in the art to which it appertains to make and use the same,.

reference being had to the accompanying drawings in which like reference characters refer to like parts throughout the specification.

The object of the invention is to provide a device for rocking an electric razor when in use, whereby to aid in increasing its effectiveness in severing the beard from a persons face. Heretofore, in the use of an electric razor, it has been necessary to rock the razor with the hand in order to get a clean shave. The present invention is designed to simulate the movements of the hand to accomplish the desired results. To this end an outer casing having bearing members to be attached to the ordinary electric razor is used. There are means within the outer casing for rocking the electric razor casing, an electric motor for actuating said means. The device can be applied to the ordinary electric razor.

The object will be understood by referring to the drawings in which:

Fig, 1 is a perspective view of the device.

Fig. 2 is an elevational view showing the central vertical section of the attachment.

Fig. 3 shows a detail view of an end view of an electric razor broken away and parts of actuation mechanism applied thereto.

Fig. 4 shows a central vertical section of a modified form of the attachment.

Fig. 5 is a detail enlarged view of a cam and strap employed.

Fig. 6 shows a modified form of the electric razor, with the attachment applied thereto.

Fig. 7 shows a central vertical section of Fig. 5, parts being in full.

Fig. 8 shows a detailed enlarged view showing a perspective of a modified form of the device, parts being broken away.

Fig. 9 is a diagrammatic view of the wiring.

Referring more particularly to the drawings, the device embodies a. casing l within which is suported on trunnions 2, 2 any ordinary electric razor 3 similar to the Schick or Remington type. Casing I is open at its front and rear ends. It encloses the larger portion of the razor 3 leaving the front part 4 containing the shearing mechanism exposed for use in shaving the beard of a person. Furthermore, casing I is spaced from the outer casing 5 of razor 3, whereby to allow for a limited amount of rocking motion of electric razor 3. Trunnions 2, 2 are fastened to opposite lateral walls e, 5 of easing i being projected through suitable apertures therein and anchored in bosses l8, 10 that are welded'or otherwise secured to the inner opposite surfaces of walls 5, 5.

Furthermore, trunnions 2, 2 project inward and rest in loose bearings H, if made in the casing 5 of razor 3. Bearings ll may be made any suitable distance from the ends of razor 3, whereby to allow for a predetermined amount of rocking thereof.

A shelf I5 is made integral with the lower part it of easing 5. It projects rearwardly from said casing 5 and is engaged by a disk 11 eecentrically mounted on power shaft 20 of electric motor 2| which is supported by the base i of easing 5.

Disk I! turns with shaft 20, whereby to cause electric razor 3 to rock on its trunnions 2, 2. Said disk i7 engages shelf l5 for this purpose. The means for rocking razor 3 in the opposite direction to return razor 3 to its normal position contemplates a coiled spring 22 that is fastened at one end to an outer corner 23 of shelf 15 and at its opposite end to the underside of the top of easing l.

Wires 25, 25 are in electric circuit with the motor, not shown that actuates the shearing knives 26 and 21 are connected to motor 2!, whereby to energize said motor 2|.

The terminals for the electric circuit that energizes the motor not shown which actuates the shearing knives 26 and 21 and the motor 2| are shown at 30, 30.

In operation, the user will connect the plug switch to the house circuit, now shown, with terminals 30, 30 which will actuate shearing knives 26 and 2'! and also eccentrically mounted disk II. He then grasps casing I and using it as a handle will move razor 3 over the parts of his face to effect a clean shave. As the razor 3 is moved over his face the razor 3 will rock on its pivots or trunnions 2, 2 to effect the motion heretofore made by his hand alone. At the same time the shearing knives 25 and 21 will sever his heard.

The modification shown in Fig. 4 embodies strap rings 35, 35 fastened to the bottom surface of electric razor 3 in which turns cams 3B, 36 mounted eccentrically on shaft 31, which is supported in a bearing in journal block 38 secured to the outer casing 40 and also in a bearing in support 4| secured to casing 40, A pinion 42 is fixed to revolve with shaft 31 and is in mesh with spur gear 43 mounted to turn with power shaft 44 of electric motor 45. Motor 45 is supported on member 4|. The ratio of gear 43 to the pinion 42 will cause shaft 31 to revolve much faster than shaft 44.

Laterally extending pins 58, 50 extend from opposite sides of electric razor 3. Pins 50, 50 engage guide slots 5| made in the inner side walls of casing 40.

The front end of casing 40 is open as in the former structure, whereby to expose the front end 52 of the electric razor 3.

The electric terminals 55, 55 of the motor not shown of razor 3 are connected in electric circuit with the terminals of motor 45, whereby to cause both motors to operate simultaneously.

In operation, the user will plug in terminals 55, 55 with the house circuit, whereby to actuate the knives of the razor and to cause the rotation of power shaft 44 and through gear 43 and pinion 42, and shaft 31 whereby cams 36, 38 will move razor 3 up and down to simulate the said motion usually applied by the user of the razor 3. Casing 48 will be used as a handle for moving the blades over the face.

The modification shown in Figs. 6 and '7 embodies an electric razor having cylinder shearing knives 6D and GI. Shearing knife 68 is in the form of a cylinder, as above indicated. It has a relatively thick end wall 61 and is mounted to turn with power shaft 85. To this end a set screw 63 is projected through the reduced rearwardly extended part 64 to engage shaft 65. The opposite end of cylinder knife 60 is open. Its lateral outer surface is formed with teeth 66 made by cutting alternate slots 68 through said surface. Solid parts 69 are left at diametrically opposite locations.

The co-operating cylinder knife BI is fitted to slide axially within knife 68. Its outer surface is in contact with the inner surface of knife 68. Teeth are made in the outer surface of knife 6| by cutting alternate slots through its surface,

whereby the axially movement of knife 6| rela-' tive to the stationary knife 60 will effect a shearing action to cut the beard of the person using the same. An annular slot 12 is made in the body of knife 6| to aid in the formation of teeth 10. Solid parts are left between teeth 18 at diametrically opposite locations similar to parts 69 of knife 60.

The means for moving cylinder knife 6| reciprocally and axially relative knife 68 contemplates a pin projected through. the reduced rearwardly extended sleeve part of knife 6i. Said pin 15 projects into an endless spiral guide groove 11 made in power shaft 65, whereby the turning of shaft 65 will cause pin 15 to travel in said spiral groove 11 and thereby reciprocate cylindrical knife 6| relative to knife 68, to cause the teeth 10 of said cylinder iii to effect a shearing action with co-operating teeth 66 or cylinder 68 to cut the person's beard.

Knife BI is splined to shaft 65by providing a key 80 that fits into an open elongated co-operating aligned recess 8| made in shaft 62 ad acent its end and in the body 83 of cylinder knife 6|. Said recesses 81 are no longer than key 55, whereby to permit of the axial movement of knife 6| relative knife 60 as above mentioned.

Shaft 62 extends to the rear and is enclosed by a hollow cylindrical casing 84 that supports said shaft in bearing 85 at the front end thereof.

Shaft 65 projects through the center of an electric motor 86, having plug in electric terminals 81, 81 that extend into the indenture or open recess 88 formed in the rear end of casing 84.

Motor 86 maybe fastened to the inner surface of cylindrical casing 84 at 89, 89.

In operation, the user will plug in on terminals 81, 81 to some house circuit and then by taking hold of cylinder casing 84 and using it as a handle move the shearing blades 60 and GI over his face to effect a clean shave. As said blades 60 and BI move over the face, both blades will revolve with shaft 65 because of the splined connection of cylinder 6| with shaft 65 and of the set screw connection of cylinder 60 at 63. Furthermore, blade 6| will be reciprocated axially with respect to blade 60 which is stationary in an axial manner because of the pin 15 travelling in spiral guide groove 11 in shaft 65, whereby to cause the teeth 10 of cylinder blade BI to cooperate with the teeth 66 of cylindrical blade 60.

In place of spring 22 shown in Figs. 2 and 3 a metal strap such as 35 shown in Fig. 5 could be used to rock the electric razor 3 on its pivots H, H.

The modification is shown in Fig. 8 where the strap 35 is welded or otherwise secured to shelf l5.

Fig. 9 shows a diagrammatic plan of the wiring of the two electric motors, that is motor 90 for actuating the shearing knives 26 and 21 and the other 2| for rocking electric razor 3. Motor 2| for controlling the actuation of knives 2B and 21 has one terminal 38 connected to wire 25 leading to wire 91 of the 110 volt house circuit and its opposite terminal 38 to the other wire 25 leading to the opposite wire I00 of the 110 volt house circuit.

Likewise, motor 90 controlling the rocking motion, has one terminal I02 connected to said wire 25 leading to the wire 91 and the opposite terminal I93 connecting to the other wire 25 leading to said wire I00.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is as follows:

1. In an attachment for electric razors, a casing for enclosing a razor, pivotal means in said casing for mounting said razor, a shaft mounted for rotation in said casing, a disk eccentrically mounted on said shaft and engaging said razor for rocking said razor in one direction and means for rocking said razor in the opposite direction.

2. In an attachment for electric razors, a casing having means for pivotally mounting said razor, a shaft mounted for rotation, and an eccentrically mounted disk on said shaft and engaging said razor to aid in rocking the same, whereby to aid in shaving.

3. In an attachment for electric razors, a casing enclosing said razor, pivots for mounting said razor to said casing, a shelf formed on said razor at some distance from the line joining said pivots, a disk engaging said shelf and mounted eccentrically to a shaft carried in said casing, an electric motor mounted in said casing for rotating said shaft, whereby to rotate said disk to effect a rocking of said razor to aid in shaving, and a spring connected to said razor and to said casing to urge said shelf against said disk.

4. In an attachment for electric razors, a casing enclosing a razor, pivots supported by said casing for mounting said razor to said casing, a shelf formed on said razor at a distance from the line through said pivots, a shaft mounted in hearings in said casing, an eccentrically mounted disk on said shaft engaging said shelf, whereby to rock said razor in one direction and spring means attached to said razor for rocking said razor in the opposite direction.

5. In an-attachment for electric razors, a casing, means for pivotally mounting said razor, a circular strap secured to said razor, a shaft mounted to rotate in said casing, a disk eccentrically mounted on said shaft and engaging said strap. whereby to rock said razor.

Images