US2440114A - Dry shaver - Google Patents

Description

A ril 20, 1948. H. 5:. PAGE 2,4 v

DRY SHAVER Filed Feb. 3, 1945 INVENTOR. ii 1212b E'1""t Em I :1 5 15 Patented Apr. 20, 1948 TATELS PATENT V BRY- SHAVER HerhertE. :Page, Alhambra, Calif.

Application February 3, 1945, fSerial'No. 575,943 whims. (01. 30-43) My present invention hasto do with powerdriven dry shavers and; in some-aspects, involves improvements upon-the electric shaver shown in my prior United States Letters Patent No. 2,355,- 672, dated August 12, 19.44.

In one .of its embodiments, the device shown in my said-prior patent involves-:the use of two nestedconcentric; perforated, cylindrical cutter elements, the outer element' being freely rotatablesoas topermit it to be freely rolled over the skin 'ofthe-user, whilethe inner elementis powerdriven but is freely rotatable relative to the-outer member and its driving element. In operation, as the outer element is rolledover the face, the hairs 'or whiskerson the facepass through the perforations-therein and into the perforations in the inner member as the latter register with those of=th'e'outer member, and, by movement of'the inner member relative to the outer'member, said hairs are severed.

Insuchdevicesit is highly desira-bleto maintainfreerotatability of the cutting members relativegto each other, butat the same time it-is essential that the outer surface of the inner cutter membersufiiciently engageagainst theinner surface of the outer member to eifect a clean cut and :provide asufiiciently close shave. The friction resulting from the latter tends to reduce the freedom of relative rotatability'of the cutting elements and it has been-highly desirable, therefore, to overcome those difliculties-while at the same time accomplishing both ofthe desired ends.

It is anobject of the invention to provide, in a shaver utilizing a freelyerotatable outericylindrical cutting head, anda freely rotatable .driven cylindrical innerhead, means: for providing. adequate light frictional engagement. between the heads atthe cuttingpoint without destroying or undulyzretarding .the 7 free relative .rotatability of thegparts.

Another object is the provision of novel and eflicient means for the application of the driving power to the inner cutter element.

My invention possesses additional but more or less subordinate objects and advantages which will become apparent from the following detailed explanation of a presently preferred embodiment, it being understood, of course, that within the scope of the broader claims appended hereto the invention is capable of being embodied in other structures differing specifically from that now to be described.

For purposes of the following description I shall refer to the accompanying drawings, in which:

A starting wheel -l1.:is secured'zonifiangemgits peripheral edge being accessible: in ra'zrecess. 2 Ila provided inythecbody; for manual engagement: by

the users finger to start the motor.

Secured to the respectiveeplates J5 by .SCI'BWS [:9 there are end plates 18, each of-whichha-s formed integrally therewith .;a; circularrflange .22 broken at 20, the latter flanges-.providingtbearing surfaces v for the outer shelhtorccutting ahead. :to be vdescribed. The numeral @lltdesignatesoarcylindrical outer shell :or. cutting: head which :has hair-p ssing perforations 3i sand.- isifreelyirotate able uponthezbearingsv provided; hyttheflanges 122.

Slidablymounted onitheetop; surface of the plates A5 I provide avyoke 35scomprising a base nd end piecesin whichitheiendsaficiarez secur d to the, base; portion 50f; .thetroke byvscrews' .36. whereby tobe detachable. rEach tb the-Tends; 35a has-a slot 38, thebottoms-oiwhichlslot-gprovides a bearingfor anend of. thIetlindledfl. vFreely rotatably mounted on each end ofithezspindle 40 thereis a spider- 41, whosalegscarry a circular ring 42.

An inner cylindrical shell or cutter head 50, presenting perforations 5|, has its respective ends mounted upon the rings 42, said ends being engaged by the extreme end portions 43 of the spider legs. Each of the spiders is held against outward movement axially of the spindle by engagement against the end members of the yoke.

The inner head 50 is of smaller exterior diameter than the inner diameter of the outer head 30 and is eccentric relative thereto. However, the inner head is maintained in contact with the inner surface of the outer head at the top portion of the device by the means now to be described.

In each of the plates I5 there is one or more vertical holes in each of which is mounteda :face. :relative to'the outer head, as well as relative to the yoke, since its supporting spiders are freely :rotatable upon the spindle 40 and spindle 40 is :rotatable in its bearings, it is positively driven to oscillate axially by means of the yoke 35. At the coil spring "66 atop which rests a ball 61, each of the balls being urged outwardly against the bottom of the yoke by the spring. The yoke is thus constantly urged upwardly so that the spindle 40 which is disposed axially of the inner head 50 is resiliently urged upwardly, carrying with it the inner head 50 until the latter contacts the inner surface of the outer head. The springs 66 are weak, however, so as not to induce too great a frictional engagement of the outer surface of the inner head with the inner surface of the outer head at the point of contact, being only strong enough to maintain the inner head in contact with the outer head.

The yoke and consequently the inner head are caused to oscillate relative to the outer head by means of the eccentric, pin l engaging in a transverse slot at the bottom of the yoke. The slot 10 also passes through a plate ll secured to the bottom of the yoke to relatively thicken the yoke at that point in order to insure that the pin ID will always engage in the slot 10 despite the upward movement of the yoke away from the pin caused by the springs 66.

From the foregoing description it will be seen that, in operation, while the outer head 30 is held longitudinally stationary, it-freely rotates on the flanges 22 so that, as the outer head engages the skin of the user while the body of the device is moved, the outer head will freely roll over the While the inner head 50 is free to rotate 'top end of the razor, which is usually the portion applied to the face, the inner head is lightly resiliently urgedagainst the inner surface of the outer head to maintain proper contact.

I claim:

1. In a power-operated shaving device, a supporting body, a pair of perforated nested cylinders mounted on the body, the outer one of the cylinders constituting an outer cutter head and being mounted for free rolling movement relative thereto in response to movement of the body when said head is in contact with the'skin, and the inner one of said cylinders constituting an inner cutter head and being mounted to move axially and to rotate freely relative to the body and outer cylinder, power means cooperating with the inner cylinder to oscillate it axially, and spring means urging the inner cyliner into eccentric relationship to the outer cylinder whereby to frictionally engage the outer surface of the inner-cylinder against the inner surface of the outer cylinder.

2. In a power-operated shaving device, a supporting body carrying power means, a perforated,

cylindrical outer cutter head mounted on the body for free rolling movement relative thereto in response to movement of the body when said head is in contact with the skin, a yoke mounted on the body to oscillate relative thereto, means operatively connecting the yoke to the power means, said yoke having upright end portions each presenting a bearing, a spindle journalled at its ends in said respective bearings, a perforated cylindrical inner cutter head disposed axially in the outer head and carried by the spindle, said spindle being disposed parallel withthe axis of the outer head and coaxial with said inner head, and resilient means urging the spindle into eccentric relationship with the axis of the outer head.

3. In a power-operated shaving device, a supporting body carrying power means, a perforated, cylindrical outer cutter head mounted on the body for free rolling movement relative thereto in response to movement of the body when said head is in contact with the skin, a yoke mounted on the body to oscillate relative thereto, means operatively connecting the yoke to the power means, said yoke having upright end portions each presenting a bearing, a spindle journalled at its ends in said respective bearings, a perforated cylindrical inner cutter head disposed axially in the outer head and rotatably carried by the spindle, said spindle being disposed parallel with the axis of the outer head and coaxial with said inner head, and resilient means urging the spindle into eccentric relationship with the axis of the outer head.

4. In a power-operated shaving device, a supporting body carrying power means, a perforated, cylindrical outer-cutter head mounted on the body for free rolling movement relative thereto in response to movement of the body when said head is in contact with the skin, a perforated inner cylindrical head mounted to reciprocate axially and to freely rotate in the outer head, a yoke slidably carried by the body, means operatively connecting the yoke-to the inner head, and means operatively connecting the yoke. to the power means.

HERBERT ELPAGE.

REFERENCES CITED I The following references are file of this patent:

UNITED STATES PATENTS of record in the Aaron -Aug." 1945

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