US1705511A - Vibratory hair cutter - Google Patents

Description

March 19, 1929. WAGNER 1,705,511

VIBHATORY HAIR CUTTER Filed Aug. 5, 1925 51 wuemfoz agikl W ?at@ented.ar. 19,1929. I

near s rr man DAVID H. WAGNER, F DETROIT, MICHIGAN.

VIBRATORY HAIR CUTTER.

' Application filed august 3, 1925. Serial no. 47,782.

This invention relates to hair cutters and relates more particularly to electrically" actuated hair cutters of the vibratory type, that is to say of the type wherem the movable blade is reciprocated by vibration of the armature of an electro-magnet.

Inhair cutters of the described type, it is common to engage the vibratory arm which comprises the armature of the magnet by an adjusting screw for the purpose of accurately regulating the throw of said arm away from the magnet. In the use of such hair cutters, the tendency of such screws to eventually work loose, due to the constant vibratory action of said arm directly transmitted to said screws, is a source of considerable annoyance and lost time. 7

It is an object of the present invention to provide an adjusting screw for the vibratory arm aforesaid and to maintain a suficient spring pressure upon said screwto prevent turning thereof except responsive to positive actuation.

Another object is to provide a vibratory hair cutter having its armature member so connected to the movable blade as to actuate the latter in a true rectilinear motion The invention consists further in the employment of an improved casing for a yibratory hair cutter and in the use of an 1nsulating cover for such casing that will protect the operator from shocks.

These and various other objects are attained by the construction hereinafter described and illustrated in the accompanying drawing, wherein: Fig. 1 is a plan View of the improved hair cutter, the cover of the casing being removed. Fig. 2 is a longitudinal sectional view of the same, taken upon the line 22 of Fig. '1. Fig. 3 is a cross sectional view of the device, taken upon the line 33 of Fig. 1. p

In these views, the reference character 1 designatesa casing formed preferably of aluminum or some other light metal and having substantially a channel form. To one end of said casing there is rigidly secured by screws 2, a blade 3 which coacts with a reciprocatory blade 4, the two said blades having the usual cutting serrations. The blade 3 is slotted lengthwise as indicated at 6 for engagement by a pair of guide pins 7 upon the reciprocatory-blade- For electrically actuating the reciprocatory blade,there is disposed within the casing 1 a magnet, comprising an iron core 8 having pole pieces 8?, 8 and 8, the pole piece 8 being centrallylocated as regards the other two pole pieces and being suitably wound as indicated at 9. 9 indicates conductors leading into the casing 1 for energizing thewindmg 9.

1O designates an armature coacting with the pole pieces 8, 8 and 8, and attached at one of its ends to a heavy U-shaped leaf spring 11, which is mounted fast upon the casing by a bolt 12 and which urges the armature toward the magnet. At its other end the armature carries a substantially U- shaped spring 13 which may have the nature of a sheet metal stamping and which establishes an actuating connection from the armature to the reciprocating blade 4. Preferably this connection is established by engaging the spring 13 in a slot 14 formed in the blade 4: substantially midway between its extremities. The bracket 13 is formed with a pair of spaced fingers 15, which project toward the serrated edge of the blade and bear upon its top face to maintain its proper proximity to the blade 3. I a v 16 designates an adjusting screw threaded into a lug 17 upon the casing 1 and acting through a coiled spring 18 upon the armature 10 to regulate the gap normally intervening between said armature and the magnet. Pref-- erably the inner end of the screw 16 is formed with a socket, as is best seen in Fig. 3, to receive one end of the spring 18. The other end of said spring is held in proper engagement with the armature by means. of a pin 19 rigidly carried by the armature and 7 present invention employsa spring 11 such as to urge the armature toward the magnet instead of from the latter, and in. order to establish the roper gap'between the armature and the dhenergized magnet, the spring such compression as will overcome the U- spring 11 so far as may be desired. Thus an endwise pressure is exerted upon the adjusting screw 16 both by the leaf spring 11 and the coilspring 18, the former acting through the latter, and this pressure isv adequate to guite positively restrain the screw from acciental turning. It is important to note that the screw 16 does not act as a stop limiting the throw of the vibratory arm as is the case with constructions heretofore employed.

The connection between the armature 10 and the movable blade 4 is such as to permit a Accordingly, as the screw 21 is tightened or loosened the spring 11 together with the armature 10 and blade 4 are more or less depressed to regulate the proximity of the blade 4 to the companion blade 3.

The shape of the casing 1 is such as to conveniently lit the hand, and by forming the cover member 22 of insulating material, the possibility of the operator receiving a shock in the event of failure of the insulation of the coil 9 to properly function, is minimized.

What ll claim is:

1.' In a vibratory hair cutter, the combination with apair of co-acting blades, one refreely bearing upon the movable blade be-' tween said opening and the cutting edge of the blade, and holding the two blades in proper proximity.

2. In a vibratory hair cutter, the combination with a pair of coacting blades, one reciprocating relative to the other and having an opening therein, an electro-magnet, an armature movable to and from said magnet, means acting upon said armature opposing the pull of said magnet, and a U-shaped 1 member carried by said armature'and comprising a pair of substantially parallel arms extending transversely across the movable blade and terminally bearing upon said blade at longitudinally spaced points thereof to hold the two blades in proper proximity, said arms beingtormed with corresponding pro- -jections engaging in said opening of the reciprocatory blade, engaging opposite edges of said opening for vibrating said blade, said arms being resiliently flexible in the direction of such vibration.

In testimony whereof ll sign cation.

: w DAVID H. WAGNER,

this specifie

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