US1798756A - Hair clipper - Google Patents

Description

March 31, 1931. c RE 1,798,756

HAIR CLIPPER Filed Feb. 24, 1930 J :2 .JJ 61 a v 29 4 [WA/w Patented Man-.31, 193i 1,798,756

um mm PATENT OFFICE CASPER I. mrmn, O! CHICAGO, ILLINOIS HAIR onmnn A Application filed February 84, 1980. lerial Illo. 480,818.

My invention relates to hair clippers, and ward. The side of the projection 1b which has for its object improvements in such deis toward the axis of the clipper is in the vices. form of a channel 12, as shown in Fig. 3.

In hair clippers in which the motive power Secured in this channel by a bolt 13 are two is a magnet located inside of a case which metal bars 14 and 15, WhlCh are separated 55 serves as a handle for operating the clipper, from each other by a washer 16 on the bolt. the magnet is secured firmly to an inter- The bar 14 is somewhat heavier than the bar mediate point in the length of the case. At 15, and is held in a fixed position by being one end of the case is fastened a lower clamped against the inclined faces 17 of the blade, commonly called a stationary blade. channel. The bar 15. is pivoted upon the bolt 60 On the lower blade is an upper blade com- 13, but has its ivotal movement limited to a monly called the movable blade. The upvery small arc y the arts of the projection per blade is reci rocated by an armature lever 11 which are above and below it. (Fig. 3). which is secur to the other end of the case The bars 14 and are of metal which is 15 and has its central part located adjacent to bendable to take a desired form, but which 65 the pole of the magnet. The magnet may be is flexible and resilient within the range withenergized and deenergized by making and in which they are flexed during operation breaking a circuit extendin to a source of of the device. That is, they are springs. direct current, but is more, requently oper- These bars lie parallel with each other, but

ated by an alternating current. not all parts are the same distance apart. 70

en the magnet is energized to move the Thus, beginning at a point a short distance armature toward the magnet, the same atbeyond the end of the projection 11, the bars tractive force acts to move the magnet toward are bent outward from each other to enclose a the armature. As the magnet is secured to rectangular space, and then back again to the case, the result is that the case and the substantially their original distance apart. 7 lower blade aremoved toward the armature Within the rectangular space between the when the armature moves toward the magnet, bars 14 and 15 is a magnet consisting of a and the case and attached parts are moved coil 18 and a core 19. The core 19 is composed from the armature when the armature is re of laminae, two of which have projections 20 tracted. As the case is held in the hand while which extendthru openings 21 in the bar 14. 80

the clipper is being operated to cut hair, there By bending these projections over on the is a continuous high speed vibrationwhich outer face of the bar 14, the core, and conseis not only annoying to the operator, but quentlyD the entire magnet, is'fiizniy secured results in oss of power. to the ar 14. e

The p m y Object of y inventlon to At a point 22, a short distance beyond the 85 free the magnet and lower blade from d point at which they return to practicallytheir 0911119091011 Wlth the cast} so as to t original distance apart, the bars 14 and 15 are vibration of the case during operation of the each given a onequarter twist so tha'fparts chpper' which originally lay vertically side by side,

40 is f- P 3 g m th now become extensions 14a and 15a which lie is p an o e evlce W1 8 case one under the other and are separated by a p g l ifi gfi with the case in distancewhich does not differ materiallyfrom the original distance.

l igsl 4 and 5 are transverse sections on The Outer end thefixtfimslon 1S bent li e 3 3, 4-4, d 5 5, ti l upward at a deslred. incl ne, and a lower At th rea e d f th d i i Sup t blade 23 is secured thereto 1n a manner com- 10 hi h l o serves as rear h d, E t mon in the art. .On the lower blade is an upsolid with this head is a lug or rejection 11, per blade The extension 15a is given a 50 which is a little ofi center an projects insimilar inclination, and is provided with p ns At a place between and a spring 25 w 'ch project into openings in the blade 24 in a anner also common in the art.

the magnet 18 -19 and the point 22, a spring 27 is secured to the bar 26 1s secured to the bar 14. These springs are connected to the lower edges of bars 14 and 15, and a short distance above the points of connection these s rings are bent outward as shown in Fig. 5. bove the bars, these springs are bent inward andoverlap with the end of the spring 27. A screw 28 threaded in the spring 26 and having an end projecting into a hole or recess in the spring 2 serves to apply strain to move the bar 15 downward with res ect to the bar 14.

t the front end of the device is a front head 29 in which is an opening 30 thru which project the arts 14a and 15a. Between the heads 10 an 29 is a cylindrical shell or case 31. This shell maybe metallic tubing connected to the heads by press fits, but is shown 'as'fiber or other insulating tubing connected to the heads by screws 32.

In the bar 14, between the projection 11 1 and the magnet 18, is a screw 33 which acts upon the armature bar 15 to press it away from the ma net so as to regulate the retractive tension v hich the magnet has to overcome in attracting the armature.

There are openings in the head 10 for electrical conductors to be connected to. the magnet, and other openings in the shell 31 for reaching the screws 28, 33 and 13.

By providing suitable make and break devices, the clipper may be operated from a source of direct current. It is more convenient, however, to dperate it from a commercial source of alternating current as is common in the art.

When a current flows thru the coil 18, the

' armature 15 is attracted toward the magnet,

the bar 14 is stifier than thebar 15, and because the mass carried by the bar 14 is greater than the mass carried by the bar 15, the length of movement of the lower blade 23 is short in comparison to the length of the movement of the upper blade 24. When the current ceases to ow thru the coil 18, the resiliency of the bars 14 and 15 move the lower and upper blades in the reverse directions.

It is to be observed that the apparatus is self-contained, and independent of the case except as'for support on t e-projection. Also, that the case held in the hand is independent of the movements of parts, and consequently free from all vibration.

The screw 33 acts as an adjusting means for regulating the tension of the springs 14 and of the spring 26 above the end late the pressure of the upper blade on the lower one. In this action, the spring is in the overlapping parts of the springs 26 and 27, and ad ustment of thelever 15 in a vertical direction comes by reason of the fact that this lever is pivoted on the bolt 13, with only a small washer 16 as frictional surface to resist pivotal movement.

What I claim is; v

1. In a device of the class described, a support, twospring barseach secured at one end to said support, a magnet carried by one bar and acting upon the other bar as an armature, and a pair of co-operating blades, one blade being connected to the free end of one bar and the other blade being connected to the free end of the otherbar.

2. In a device of the class described, a-pair of spring actuated bars having a pivotal relation to each other, a magnet acting to move said bars with respect to each other, and

cutting blades secured to the free ends of said bar which carries the magnet and an upper blade secured to the bar which acts as an ar- 1 mature, and tension means carried'by said bars and serving to press the blades together. 4: A support, a spring bar secured in a fixed position on said support, a second"? spring bar pivoted to said support, a magnetcarried by the first bar and acting upon the second bar to attract it, a'lower blade' secured to one bar and an upper blade secured to the other bar,'and tenslon means carried by the bars and acting upon the pivoted bar to 'move it on its pivot so as to press the blades to gether. p

5. A support, a blade moving mechanism carried by said sup ort, a pair of cutting blades carried by sai mechanism, and" a handle serving as a means for carrying said su port and also serving to enclose the bla e moving mechanism while being clear. of contact therewith. i i 6. A casing, a head closing one end of said casing, an electro-magnetic blade moving mechanism secured to said head and support; ed withinsaid casin clear of contact there with, a second head or closing the other end of said casing and providing an opening thru which said mechanism'pro ects clear of the bee, and blades secured to the projecting part of said mechanism.

7. In a device of the class described, a casing, a pair of cutting blades, and an' elec tro-magnetic blade moving mechanism supported within the casing and serving to move th of said blades clear of contact with said casing.

8. A air of cutting blades, levers for moving the lades simultaneously in opposite directions for cutting urposes, an electro-mag- 1o netic power device or operating said levers, and a spring tension devlce connected to said levers and serving to regulate the stroke of said levers and also serving to hold the blades yieldingly together.

9. In a device of the class described, a pair of bars supported adjacent to each other a power device acting to move said bars with 'respect to each other, cutting blades secured to and moved by said bars, tension means for pressing the blades together, and a casing enclosing said bars but not partaking of the movements thereof.

10. In a device of the class described, a. casing, a pair of cutting blades supported by said casing, a power device operating to 7 move the blades with respect to each other and with respect to the casin and tension means serving to press the b ades together While being moved.

so 11. In a device of the class described, the combination with a pair of blade carriers, and means for movi g them with respect to each other, of a spring secured to one carrier and extending over the other, a second 315 spring secured to the second carrier and extending over the first spring, and tension adjustin means interconnecting said springs.

12. a device of the class described, a cas ing, a air of spring bars secured at one end to sai casing, one of said bars being materially stifler than the other bar, a power device mounted upon the stifier bar and acting to move the ot er bar, and cutting blades secured to the free ends of said bars. 46- CASPER L. REDFIELD.

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