US1351507A - Rotary safety-razor - Google Patents

Description

C. B. COLL|NS. ROTARY SAFETY RAZOR. APPLICATION FILED JULY 27,1918

2 SHEETS-SHEET I.

dttowu Patented Aug 31, 1920 C. B. COLLINS. ROTARY SAFETY RAZOR- APPLICATION FILED JULY 27, I918.

2 SHEETSSHEET 2- ameutoz 0.13. 00' ZZins Patented Aug. 31, 1920.

tional housing.

movement between the housing sections'will t w1th the threaded end of the guard support ROTARY Specification of Letters Patent.

SAFETY-RAZOR.

Application filed July 27, 1918. Serial N0.247,064.

To all whom it may concern:

Be it known that -I, CAP BERTRAND Con- LINs, a citizen. of the United States residing at Sioux Falls, in the county of innehaha and State of South Dakota, have invented certain new and useful Improvements in Rotary Safety-Razors, of which the following is a specification.

This invention relates to certain new and useful improvements in rotary safety razors of the self-contained type, and, among others, has for,its objects to provide an improved driving connection between the blade and the motor whereby the blade may read- ,ily be disconnected for cleaning and renewal; an improved guard for the rotary blade which may be adjusted to vary the cut of the blade to obtain either a coarse, or a close shave; an improved motor and a sectherefor whereby relative efi'ect winding of the motor; and means operable exteriorly of the housing for controlling the speed of and stopping the motor.

In the drawings: Figure 1 is a vertical section through the improved rotary safety razor, the motor and which is guard support being depicted in elevation;

Fig. 2 is a horizontal section therethrough showing the driving mechanism in top plan; Fig. 3 is an irregular vertical section on line 3-'3 of Fig. 2 showing more in detail the internal construction;

' gig. 4 is a bottom plan view of the motor; an

Fig. 5 is a fragmentary detail perspective view of one of the governor controls.

In the embodiment of the invention depicted, the motor 1 is inclosed vwithin a-casing or housing comprising an upper section 2 and a lower section 3--which sections are relatively rotatable.

The motor is of the coiled spring type, the spring being contained within a closed box journaled on the central winding stem composed of two telescopic hollow sections 4: and 5, the sections being locked together by a screw 6. This winding stem is journaled at each end in a fixed frame 7, the lower end thereof having an extension carrying a ratchet 8 and a depending stub 9 stem being on which a socket 10 is threaded. .The socket is fixedly carried by'the lower housing section 3 so that rotating the latter on section 1 will turn the winding stem to wind the Patented Au 31, 1920.

spring, a spring pressed pawl 11 being pivoted on the motor supporting frame to hold the ratchet against unwinding.

An internal gear 12 is carried on top of the motor box and meshes with a gear 13 fixed on the lower end of a vertical shaft 14. The shaft is 'journaled in frame 7 and also in a superposed frame 15, and carries a fixed gear 16 on its upper end.

A tubular guard support 17 has its lower flanged end secured to ,the motor frame 7 and is provided above said flanged base with a slot 18 through which the teeth of drive gear 16 extend and operate. The upper end of the guard support is externally screw threaded to adjustably engage a circular guard 19, a lock nut 20 being also engaged for impinging against the guard and holding 1t in anypredetermined adjustment.

Within the guard is arranged atubular shaft 21 formed on its lower end with a peripheral gear 22 the teethof which latter mesh withthose of drive gear 16, The upper end of the blade shaft 21 is enlarged to form a peripheral shoulder 23 designed to engagement with a-counter bore in the head of the blade holder shaft. I

j A stationary center post 31 is disposed within the blade holder shaft ,21 and is a concentric formedin its upper end with recess in which asteln 32 is threaded, said spherical shield 33. The blade clamp 29 is of smaller diameter than, and is entirely recentrally carried'by a somewhat ceived beneath, the shield 33, the latter seembodying a shaft 86 i the adjustment of blade rest 27.

, moved from lifted off as a w'ardly out of. mesh with the drive gear.

curing the blade holder in position within the guard support 17. Support 17, is braced from the upper end of the casing or housing 2 by an outwardly extending flange 34, while the" lock nut 20 .has a depending skirt encircling said upper end to give a finished appearance.v

or the purpose of controlling the speed at which the disk blade is rotated, a governor 35 of the centrifugal type is provided, on which is slidable a brake disk 37 that is slid along the shaft as the weights recede through centrifugal force. The governor shaft is journaled in a pair of brackets l carriesa worm gear 39 which is drivenfrom the drive gear 16 through a train of speed gears 40. are adapted to bear against the governorbrake disk, the former serving as a brake for stopping the motor and ing carried by an actuating member 43 .slidablein a slot formed in the casing 2. Member 42 engages one end of a lever 44 which is pivoted between its ends on the motor frame and has its opposite end turned upwardly tolie between the arms of a forked actuating mem ber 45 also slidable in a slot in'the casing. In use, the spring motor is Wound by rotating the lower housing section, whereupon the brake is released by slide 43 and the peed of rotation of the cutter determinhd slide 45. The guard is adjusted toward or fromthe blade, de-

pending upon the cut' desired, by releasing locknut 20 and then moving the guard on its threaded-mounting following which the lock nut is again impinged against the guard. In order to permit the edge of the blade to rest practically in contact with the guard the latter is dished to receive the To clean the razor or for renewing the blade, the blade securing member 33 is reits stationary center postv whereupon the blade and its holder maybe unit, the gear 22 sliding up;

i e guard may now be cleaned, and by removing the blade clamp 29 the blade may be lifted fro m its rest. To reassemble, it is merely, requisite to replace the blade on its rest, secure it there by itsclamp, drop the blade holder back into the tubular guard support, and position the shield or guard 33 on its center post. The gears 21 and 16 will automatically mesh with. one another without any special operation and are readily separableon lifting out the blade holder unit. I L i What is'claimed is: 7

n a rotary razor, a casing, a post therein, blade drlving means arranged adjacent said post, a blade carrier rotatably and slidably receivable over the post and en- 38, on the motor frame, and

spring motor, a housing A pair of friction shoes 41 and 42 the motor and emb ,an inwardly extending bifurcated through K I variable I space between same and disengagement of casing, abladecarrier' rotatably and slid on the post, means to rotate ably mounted the 'post, and a shield overthe carrier on lying the carrier and blade andhavinq removable engagement with the post to hold thecarrier against sliding on the post and to allow removal of the carrier from the post. p

3 A rotary safety razor including a therefor, a frame fixed to the housing and rotatably supporting the motor, a speed governor mountedon the frame in operative connection with odyinga centrifugally weight-operated disk, 'a lever pivoted betweemits ends on the frame and carrying a brake shoe on one end for variablepressure on the disk, and a A- rotary safety razor including a supporting the motor,

connecting the companion housing section to the winding stem of the motor, a speed governormoun'ted. on .the frame in operative connection with the motor and embodying a centrifugally weight-operated disk, a lever pivoted between its endson the frame and carrying a brakeshoe on one end for pressure on the disk, a, controlling member slidably mounted ,on the upper housing section and having an end of the lever for swinging the latter to apply the shoe and vary the speed of the motor, and a second control-member v slidably carried by the upperhous'ing section and having an inwardly extending brake shoe engaging the disk and stopping the motor. 7 ,2 5. In a rotary razor, a casing, blade driving means therein, a bla ab y connected to said driving means, a guard underlying the blade, means to adjust the guard to increase or decrease the overlying, the blade and v disengagement of the blade carrier, from said driving means, and means whereby to secure said shield relative to the casing and to allow of removal the carrier from said drivng means.

6. A rotary safety razor including a houscontrolling member slid- I the housing and having d in the upper housing section thereof so as .t'opcrmit swinging the latter vto apply the shoe and, vary the speed ofthe motor.

inwardly ex tending bifurcated part straddling-the other .110;

de carrier detach= the blade, a shield 1 acting to prevent i ing, a drive gear journaled therein, a blade guard, a sleeve support carrying the guard at one end and having'its opposite end porgear projects,

tion formed with a slot through which the and a rotary blade carrying shaft removably disposed within the sleeve support and provided with a gear on its inner end for meshing with the drive gear;

rigidly mount the shield, and means to rodrive means therein including a gear,

tate the blade relative to the shield.

8. In a rotary razor, a blade carrier, drivthe earner, means to allow ing means for the carrier to be engaged with and disengaged against slidingf while permitting free rotation thereof.

9. In a rotary safety razor, a housing,

atubular guard support threaded at'its outer end, a blade guard engaged with the threads thereof for adjustment, means for locking the guard in its adjusted position, a rotary blade superposed on the guard, and a blade supporting shaft j ournaled in the tubular support and carrying a gear on its inner end for meshing with the drive gear. a Y 10. In arotary safety razor, a rotary blade holder, drive means, and a detachable connection between the two including separable gears.

spring motor, an upper housing, a lower means having housing connected thereto, means to support the motor from one of the housings whereby on rotating the other of said houswound, and a cutter operable by the motor.

12. A rotary safety razor including a tubular guard support, a guard carried thereby and adjustable longitudinally t eof, a rotary blade arranged above the means passing for rotating the blade.

-13. A rotary safety 'razor including a guard, a hollow support therefor, drive A rotary safety razor including a uard, .and through the tubular support" and a blade-clamp detachably engaged with the shaft and engaging over the blade.

- 15.:In a rotary safety razor, a center 'ost,

a blade holder comprising a hollow sha recarrying a flat blade ceiving the post and the rest and rest on its upper end, a blade on a clamp 'superposed'on the blade and formed with a tubular shank passing centrally through the blade for engaging the shaft, a support, drive means carried thereby including a wheel engaging the lower end of the shaft, a guard carried by the support iel s beneath the blade, and a sh ecured to the center post and extending over the blade clamp for locking the blade holder in posi-.

means,

tion. a 16. In a rotary safety razor, driving a circular cutter, means to support the cutteiymeans to drive the cutter supportfrom the driving means by sliding thereof, and means to hold the carrier means having a gear wheel extending into the support, a blade holder embodylng a shaft insertible in the hollow support and carrying a gear on its lower end for meshing with the'gear wheel, means for securing the holder in position,

holder.

and a blade carried by its blade holder embodying a sections, tion, a pawl engaged with the'ratchet and ing means from said driving means, and means whereby'to allow the cutter supporting means to be engaged with and disengaged from the driving means by a mere lifting movement of the cutter supporting means.

17 In a rotary razor, a blade carrier, meansto slidably support the carrier, drivin means for the carrier,means to allow the carrierto be engaged with and disengaged from the driving means by sliding thereof,

and means detachably connected to the carrier supporting means for holding the carrier a ainst sliding. 4

18 n a rotarysafety razor, a rotary blade holder, a. drive slidably connected therewith, and detachable means to prevent sliding of the blade holder so that upon detachment by sliding thereof. f

19. In a rotary safety razor, a casing composed of a lower and a superposed upper section formed to overlap, one another, a winding motor carried by one of the sections, said sections being capable of relative rotation, acircular disk blade carried by the upper section, means to drive said blade from the the holder may be removed from the drive motor, and meansto-effect winding of the:

.posed of a lower and a superposed upper section a winding motor carried by one of the a ratchetcarried by the other seecarried by "said first section, a circular disk blade carried by the upper section, means to drive said blade from the motor, and'means to allow of relative rotation of the sections whereby upon rotation the motor will be wound. w

21. In a rotary razor,.the combination of a hollow handle, astationary circular peripherally-toothed guard fixed'to said handle, an externally-convex stationary face-plate fixed to said handle and having a smooth outer face-engaging surface, a mechanical -motor in said handlq'and a rotary circular disk blacle between said stationary guard and stationary face-plateand revolved bysaid motor,

5 22. In at rotary razor of the oharaeter de-i scribed, the combination of a hollow handle ofgenemkpear shape of an upper means to wind 'sald motor by turning one of the, handle sections relatively .to the 10 other, a circular rotary disk blade, and

means for revolving such blade by the motor. In testimon whepeof I afilx m si ature.

C BERTRAND G INS. v

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