US1390702A - Electric razor - Google Patents

Description

J. A. HAMMOND.

, ELECTRIC RAZOR.

APPLICATION FILED MAY, |920.

1,390,702. Patentedsept. 13,1921.

A TTOHNEYS WMM;

UNITED STATES PATENT OFFICE.

JOSEPH A. HAMMOND, OF DEMING, NEW MEXICO, ASSIGNOR T0. HAMMOND-HOWARD MANUFACTURING COMPANY, (NO STOCKHOLDERS LIABILITY,) OF DEMING, NEW MEXICO, A CORPORATION OF NEW MEXICO. f

ELECTRIC 'RAZOR.

Specification of Letters Patent. v Patented Sept. 3, 1921.

Application led May 6, 1920. Serial No. 379,3()1. I

T all whom 'it mag/concern.'

Be it known that I, JOSEPH A. HAMMOND, a citizen of the United States, and a resident of Deming, in the county of LunaI and State o1" New Mexico, have invented certain new. and useful Improvements in. Electric Razors, of which the following is a specification.

My invention relates to improvements in razors, it being more particularly an im- .provementin electric razors, and it consists in the constructions, combinations and arrangements herein described and claimed.

One of the foremost objects of the invention is to provide a concave razor of the ordinary straight blade type, with electrically operated means for giving the blade a swinging cutting stroke in contradistinction to the parallel or .chopping stroke which is characteristic of all electric razors now in common use.

A further object of the invention is to provide a razor of the type described, wherein the operating mechanism is so housed or incased in the handle, that an implement of graceful appearance isfpresented, the proportions -being such that it can be agreeably handled. r

A further object of the invention is to provide an improved pivotal mounting for the shank of the razor blade, which mounting consists either of a double-pin arrangement or an arrangement with one pin and a pressure spring.

Other objects and advantages will appear in the following specification, reference becing had to the accompanying drawing, in

which'z- Figure 1 is a vertical longitudinal section Aof an electric razor constructed inrac'cord 40 ance with my invention,

. Fig. 2 is an enlarged section. of the base or handle',i1lustrating more clearly the electricv operating mechanism,

Fig. 3 is a detailed enlargedl section illus;

trating one form of razor shank mounting,

Fig. 4 is a detail horlzontalsection taken substantially on the lineA--40f Fig. 3, and

Fig. 5 is a view similar to Fig. 3, illustrating a slight modification ,in 'the razor shank mounting.

In vcarrying' out my invention I providea razor blade 1' of the ordinary concave c loose the blades can occur.

llated from the other straight-blade type, on the end of the shank 2, which extends into the handle 3 and is connected to the extension shank 4 by means of the lnsulating connecting piece 5. The purpose of the insulating connecting piece is to prevent the passage of electric current over the shank of the razor to accidentally reach the face of the user in case a sli-ort circuit should occur.

A guide 6, suitably fixed inside of the handle 3, serves to stabilize the oscillatory motions of the shank. These motions are produced by the rapid vibration of the armature 7 of the electro-ma net 8. The upper lend of the armature g has a suitable keeper 9 1n which the lower end of the eX- tenslon shank 4 fits, it being obvious that as the armature 7 vibrates, the shank 2 is caused to rock on its fulcrum and thus give the blade 1 the swinging cutting motion indlcated by the double dotted lines a-b.

Attention is directed to the construction of this pivotal mounting. The upper 'and reduced end ofthe handle 3 terminates in a collar 10, through which two pins 11 are driven to partially, occu y theI concavities 12 inthe opposite edges ci) the shank 2. The connection between the concavities and pins .is sufficiently loose to enable the resultant swinging motion 'of the jblade when the shank is reciprocated as just stated.

c A modification of the ivotal mounting is illustrated in Fig. 5. iere only one of the pins 11a isemployed, the opposite concavity 12a serving-as the seat for the upper ,end of the'leaf spring1-3` ,which presses the shank 2 overagainst the pin' llfand thusmaintains a 'tight joint at all times. The arrangement in Fig. 5 is valuable in that all play and wear is respectively pre-v vented and taken up, so that norattling of- ,l

, Th make-and-break mechanism of the magn t 8 and armatures? is of the comen-- tional type andl briy described, consists of Athe spring contacts 14, 15, the latter 'of which is in electrical connection with ythe stud Vor.

.rivet .16 whichv leads one side of the 'external circuit into Vthe o erating mechanism, through the wire 17. he studv 16 'is insuart of the mechanism as clearlyl` shown in A ig. 2, The other side ofthe circuit enters at the wire 18 and terminates at the switch contact 19.

Carried by the slide button 20 is the companion switch contact 21, the Wire 22 of which leads to one of the coils of the electromagnet. The other coil is connected by means of the wire 23 to the metallic cylinder 24 by which the coils, etc., are carried.

Adjustments of the contacts 14 and 15 are made by means of the screw 24.

The cylinder 24, and in fact, the whole of the electrical mechanism, is housed in the insulating casing 26 which lits in the bottom of the handle 3 so as to protect the hand ot the operator in case of a short circuit on the inside. The operation may be briefly reviewed to advantage. In order to start the cutting operation of the blade 1, the slide button 20 is shoved down so that the companion contact 21 engages the fixed contact 19.

Current then iiows from the source of current supply, over wire 18, through contacts 19 and 21, over wire 22 to the coils of the electro-magnet 8, returning via wire 23, the ground connection of the cylinder 24 with which the contact 14 has engagement, through contact 15. stud 16 and wire 17 to the negative pole of the source of supply.

. As is commonly known, in a make-andbreak device of this character, the completion of a circuit along the path just indi- .mediately restablished. The result of this cated, energizes the electro-magnet 8 so that the armature 7 is attracted, thereby breaking the connection between the contacts 14 and 15 and in turn breaking the circuit. The leaf spring 27 causes the return of the armature, whereupon the above circuit is ini-,a`

operation is the rapid vibration of the armature and the oscillation of the shank 2.

One might suppose that the razor blade 1 would require a guard in order to prevent the user from cutting his face. But by actual experimentation it has been demonstrated that the razon-even in inexperienced hands, will not cut the fiesh.' The manner in which the razor is used, is to simply movey it across the face Awith a moderately rapid stroke, the swinging of the blade 1 accomplishing the shaving operation in` a rapid and clean manner.

There is considerable virtue in the particular arrangement of the parts shown in Fig. 1. The gradual tapering shape of the handle 3 provides the means whereby the implement can be held. and manipulated for a great length of time without undue fatigue, at the same time providing ample acilities for the housing of all of the requisite mechanism. y

While the construction and arrangement of the improved electric razor as herein described and claimed, is that of a generally preferred form, obviously modifications and changes can be made without departing from the spirit of the invention or the scope of the straight concave type, with a shank and means providing a pivotal mounting; and means for oscillating the shank on its mounting to impart a swinging cutting stroke to the blade.

3. A razor, comprising a blade, with a shank in longitudinal continuation thereof, and a mounting on which the shank is pivoted; and means operative on the end of the shank to oscillate it on its pivot and impartl a swinging cutting 'stroke to the blade.

4. A razor, comprising a straight concave blade, with a shank to which it is attached and which extends longitudinally in the line of the cutting edge; means providing a pivotal mounting for the shank close to the blade, and means operative at the end of the shank for oscillating it on its pivot to impart a swinging cutting stroke to the blade.

5. A razor, comprising astraight concave blade, with a shank to which itis attached and which extends longitudinally in the line or the cutting edge; means providing a pivotal mounting for the shank close to the blade, and means operative at the end of the shank for oscillating it on its4 pivot, including an electro-magnetically vibratory member with a keeper into which the end of thc shank loosely tits.

6. A razor, comprising an electrically vibrated member with a keeper, and associated electrical connections; a razor blade with a shank provided with a pivotal mounting, and a separate extension shank fitting into the keeper; and an insulating bridge piece joining the shank and its extension, and preventing electric current reaching the blade in the event of a short circuit in the electric operating mechanism.

trical vibrating means including a keeper loosely 'receiving the end of the shank to impart an oscillatory motion thereto on its plivot and a swinging cutting stroke to the b ade.

8. A razor, comprising a hollow handle,

tapering from an enlarged base to a terminal fcollar, with a ivotal mountingga two part shank extending longitudinally of the handle from its pivotal mounting to the enrying said electricalmechanisin and prevent-I lng current reaching the handle in the event of a short circuit, and a bridge piece connecting the two-part shank, preventing cur,- rent reaching the blade in the event of ay short circuit.

9. A razor, comprising a hollow handle, with an insulating casing, and a. metallic cylinder providing the mounting for electro-magnetic vibrating means and a part of a current path l ading from current connections to said vi rating means; a shank in the handle, with a connection to the vibrating means, and a'pivotal mounting on a part of the handle, also including a straight blade above said mounting, operated with a swinging cutting stroke when f the shank is oseillated by said vibrating means.

10. In an electric razor; a blade withan structure but prevent the passage of current from the extension to the main shank.

1L The combination in an electric razor, of a hollow handle with a terminal collar with across pin, and a blade with a shank extending through the collar into the handle, having a concavity resting-on the pin.

12. The combination in an electric razor,

yof a hollow handle with a terminal collar with a cross/pin, av blade with a shank ex tending through the collar into the handle, having a concavity resting on thevpin, and companion means for holding the shank in engagement with thev pin.

13. The combination in an elqctric razor,

of a hollow handle with a terminal collar` with a cross pin, a bladewith ashank extending through the collar into @the handle, having a eoncavity resting on the pin, and a leaf s ring engaging an opposite concavity tolli 14. A mechanical Irazor, comprising a blade, a supporting element adjacent one old the shank in engagement with the pin-to prevent loose play.

end of the blade, and means rapidly swinging the blade on its support, to produce a substantially angular motion of the cut ting edge.

15. A mechanicallrazor, comprising a.4

blade pivoted adjacent one end, and means for swinging the blade on its pivot. s

JOSEPH A. HAMMOND.

Images