US2364162A - Electric shaver - Google Patents

Description

Dec. 5, 1944. 'w. J. PASINSKI ELECTRIC SHAVER Filed July 9, 1942 IN V EN TOR.

WQZZQT Paarzalai.

BY & w

or clip any hairs entering the slots 2|. To this end, the spider I3 is provided on its upper surface with an upstanding, annular bearing rim 24 which seats against the body portion 22 of the cutter 22. The spider I3 is so positioned within the skirt or side wall I! of the shear plate l6 that the cutter is confined between the spider and shear plate in condition for rotation but with the cutting teeth 23 seated nonyieldingly against the underside of the shaving surface I9. The spider is so positioned that axial play in the cutter is avoided and the cutting teeth engage the shaving surface l9 only with sufficient pressure to insure a close shearing or clipping contact therebetween. By the foregoing constructiomthe' use of springs for urging the cutter member into drive head 36 with slight pressure which does not hinder the tendency of the ball head 36 to rotate.

The drive ball 36 is so positioned that it is disposed snugly between and is embraced by the arms 30 and 3| of the coupling member 29. Also, the coupling arms 30 and 3| are of sufiicient width to remain in drive relation with the ball head 36 as it moves back and forth during rotation of the armature shaft 32, as illustrated in Fig.5. In this way rotation of the armature shaft'32 drives the coupling member 29and shaft 21 with an oscillatory motion (Fig.

The electric motor (not shown) is started by 'rotation of a starting wheel 42 carried at the 15" upper end of the armature shaft 32 projecting througha slot, 43 in the side wall of the housing cutting engagement with the shear plate, as is customary in well known types .of electric razors, is eliminated, thereby greatly reducing wear and insuring a long operating life for the razor 'with'-' out repair or replacement. of the cutter; 'Also,

,with this arrangement, less power is required to oscillate the cutter, and the oscillatory motion ofithe cutter is carried out quietly with greater uniformity in speed. l

-.The body portion 22 of the cutter 22 is provided with a central opening 25 which is, preferably, but not necessarily, square. The opening 25 receives a complementally shaped head 26 cated on the, outer .end of an inclined driven shaft 21 which is journaled in an opening l5 extending downwardly and rearwardly through the bearing l5. It will be noted, in ,Fig. 2, that the lower end of the bearing member is re-- duced and extended so as to provide a journaledsupport for, the shaft 21 throughout the length of the latter; and that the lower end of the shaft 21 issupported substantially in vertical alignment withthe axis of the handle portion I0 of the housing. The shaft 27 is oscillated to, in turn, oscillate the cutter 22 by-an armature shaft 32 located. substantially on the axis of the handle ticularly, this drive means comprises a bifurcate coupling member 29 having a fiat body portion 29 riveted, or otherwise fixedly secured at 28, to the lower-endof the shaft 21. The couplingmember 29 is also provided with a pair of depending, angularly disposed arms 39 and 3| which extend vertically downward from the body portion 29 in vertical alignment with the adja--: cent end of the armature shaft 32 and substantially parallel thereto.

The coupling member 29 is adapted to be driven;- from the armature-shaft 32 by an eccentric drive element mounted upon the upper end. of the-, armature shaft 32. Specifically, a cap plate 33;- is mounted-upon the upper end of the armature shaft 32, and is secured thereto by a lockingscrew 34. The cap plate 33 is provided onits upper surface with an upstanding, eccentrically: positioned tubular shaft 35 which passes through. an opening in and rotatably supports a ball',-=; shaped drive head 36. The drive head 3 6- is rotatably secured to the eccentric shaft 35 by a rivet or stud 38 which passes through the tubular shaft 35 and which is provided with heads 38*, and 38 at its opposite ends for fixing it in place. The upper head 38 is enlarged and it seats a ainst an upper flattened portion of the ball;

maintained in cutting relation to theeshaving;

'19, as is customary in prior forms of electric razor k q i believe that the operation and advantages of my'in'vention will be well understood from the foregoing description. ,Whenthe razor is inoperation,. the armature shaft 32 rotates at a com.-

paratively high-speed and this rotary motion is translated into oscillatory motion by the eccentric connection above described. This oscillatory motion oscillates the shaft 21, in turn oscillating the cutter 22 to move the teeth 23 of the latter back and forth across the slots 2| of the shaving surface l9 to shear any hairs that may be protruding through the slots 2 I. The cutter is surface Without springs. This relation is a fixed one and wear. is reduced, less power for operation is required, the cutting action is more quiet, the

cutting speed ismore constant, and the over-all shaving'efliciency; ofthe device is greatly improved. The structure asawhole is quite simple. It is rugged and durable so that it may be operatedfor long periods of time Without repair or maintenance. attention. Furthermore, the driving mechanism provided by my invention is ac-..

curately balanced so that it operates quietly at big speedwith a minimum ofwear. i

I claim:

1. An electric razor comprising a housing, a

7 cutting head on one end of said housing compris ing a shear plate on the top. of said head and a cutter mounted in said head under and in cutting relation to said shear plate, the plane of saidcutting headbeing inclined at an angle to the lone.

gitudinal axis of said housing, a rotatable shaft in said housing extending substantially parallel to the longitudinal axis thereof and adapted to be driven by anelectric motor, an inclined shaft in-the upper portion ofsaid housing connected at its upper end to said cutter and extendingdownwardly at an -angle to the longitudinal axis of said rotatable shaft, and eccentric means..op-;

erably connecting said rotatable shaft and said inclined shaft and adapted to convert the rotat ing movement of said rotatable shaft to oscilla tory movernentof said inclined shaft wherebyl the c utter is oscillated-in said inclined head."

2. An, electric; r-azorcomprising a housing, .a'

inclined at an angle to the longitudinal axislof said housing, a rotatable shaft in said housing extending substantially parallel 'to the-longitudi-" nalcaxis thereof and adapted tobe driven by'an electric motor, an -inclined shaft in the upper portion -of said housing connected at its upper end to said cutter and extending downwardly at an angle to the longitudinal axis of said rotatable shaft, eccentric means carried by the upper end a of said rotatable shaft, and a bifurcate member secured to the lower end of said inclined shaft for oscillatory movement therewith and engaged with said eccentric means, whereby rotation of the rotatable shaft causes oscillatory movement of said inclined shaft and, in turn, said cutter.

3. An electric razor comprising a housing, a

cutting head on one end of said housing comprising a shear plate on the top of said head and a cutter mounted in said head under and in cutting relation to said shear plate, the plane of said cutting head being inclined at an angle to the longitudinal axis of said housing, a rotatable shaft in said housing extending substantially parallel to the longitudinal axis thereof and adapted to be driveniby an electric motor, an inclined shaft in the upper portion of said housingconnected downwardly atan angle to the longitudinal axis of said rotatable shaft, and an eccentrically disposed drive member mounted on the upper end of said rotatable shaft and extending upwardly 21 at its upper end to said cutter and extending therefrom, and a bifurcate member secured to the lower end of said inclined shaft and extend ing downwardly therefrom into engagement with said eccentric member, whereby rotation of the rotatable shaft causes oscillatory movement of said inclined shaft and cutter.

4. An electric razor comprising a housing, ;a

cutting head on one end of said housing comprising a shear plate on the top of said head and a? cutter mounted in said head under and in cutting relation to said shear plate, the plane of said cutting head being inclined at an angleito the longitudinal axis of said housing, a rotatable shaft in said housing extending substantially parallel to the longitudinal axis thereof and adapted to be driven by an electric motor, an

inclined shaft in the upper portion of said housing connected at its upper end to said cutter and extending downwardly at an angle to the longitudinal axis of said rotatable shaft, a ball-like eccentric member mounted on the upper end of said rotatable shaft and extending upwardly therefrom, and a bifurcate member having apair of arms rigidly secured to the lowerend of said inclined shaft and extending downwardly there from to embrace said ball-like eccentric member, whereby rotation of the rotatable shaft causes shaft terminating at a point where its longi- "cutting head on one end of said housing comprising a shear plate on the top of said head and a cutter mounted in said head under and in cutting relation to said shear plate, the plane of said cutting head being inclined at an angle to the. longitudinal axis of said housing, a rotatable shaft in said housing extending substantially parallel to the longitudinal axis thereof and adapted to be driven by an electric motor, an inclined shaft in the upper portion of said housing connected at its upper end to said cutter and extending downwardly at an angle to the longitudinal axis of said rotatable shaft, eccentric means carried by the upper end of said rotatable shaft and including a plate membersecured to the upper end of said rotatable shaft for rotatable movement therewith and a ball-shaped member secured off-center relative to the longitudinal axis of said rotatable shaft on the upper surface of said plate member, and a bifurcate member secured to the lower end of said inclined shaft and having arms extending vertically downward therefrom into embracing engagement with said ball-shaped member, whereby rotation of the ro- V tatable shaft causes oscillatory movement of said inclined shaft and cutter.

7. .An electric razor comprising a housing, a cutting head on one end of said housingo'omprising a supporting member secured to the upper end of the housing and having an upwardly directed fixed bearing member on the upper surface thereof, a slotted circular shear plate secured to said supportingmember and in spaced relation thereabove, and a circular cutter mounted between said supporting member and said shear plate for free oscillatory movement therebetween without binding, said cutterbei'ng con fined and maintained against the under surface of said shear plate and in cutting relation there oscillatory movement of said inclined shaft and I said cutter.

cutting head on one end of said housing comprising a shear plate on the top of said head and a cutter mounted in said head under and in cutting relation to said shear plate, the plane of said cutting head being inclined at an angle to the longitudinal axis of said housing, a rotatable shaft in said housing extending substantially parallel to 'the longitudinal axis thereof and adapted to be driven by an electric motor, an inclined shaft in the upper portion of said housing connected at its. upper end to said cutter and extending downwardly at an angle to the longitudinal axis of said rotatable shaft, said inclined 5. An electric razor comprising a housing, a

to by the fixed bearing member of said supportr ing member, a rotatable shaft in said housing ex tending substantially parallel to the longitudinal axis thereof and adapted to bedriven by an electric motor, an inclined shaft in the upper portion of said housing connected at its upper end to said cutter-and extending downwardly at an angle to the longitudinal axis of said rotatable shaft, eccentric means carried by the upper end of said rotatable shaft, and a bifurcate member secured to the lower endof said inclined shaft for oscillatory movement therewith and engaged with said eccentric means, whereby rotation of the rotatable shaft causes oscillatory movement of said inclined shaft and cutter.

' WALTER J. PAS INSIGI.

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