US2312933A - Rotary clipper - Google Patents

Description

ROTARY CLIPPER Filled sept. l1. 1942 l Mie-star Secrs 3/ 4 v Snvenfot (Ittornegw l Patented Mar. 2', 1943 UNITED STATES f PATENT oFFlcE no'rmr einem inestaseiders, madman. Application September 1, 1942, Serial No. 456,872

' e claim. (ci. sms) My invention relates to rotary clipper devices, and more particularly to those adapted for and specially intended to cup thehairsgrowing in 4 the nose and ear cavities of a person, and my object is to provide a fully protected safety device for closely clipping the hairs. in such like Acavities in a simple and eiTective-manner, free from any discomfort or likelihood of harm to vthe delicate surrounding membrane.

More specifically my invention relates to an improved rotary clipper device having a safety cutting head, with a cutter blade movably mounted thereon, and means for operating said blade in a successive cycle of spirally projected rotations.

The nature of my improvements and the mann'er of their operation will be more fully described hereinafter in connection with the accompanying drawing, and the novel features set forth in the appended claims.

Fig. 1 is a side elevationoi' a -rotary clipper I embodying my invention. 4

Fig. 2 is a longitudinal sectional view, on an iiilarlged scale, of the clipper device shown in Fig. 3 is an enlarged cross sectional View of the safety cutting head, taken on the line 3-3 of Fig. 2.- v y Fig. 4 is a separate perspective view of the i rotary cutter blade or thimble shear knife.

inder, closed at one end by apertured plug 6, and.

its larger open opposite end being shown as internally screw-threaded to receive the screw threaded inner end of the safety cutting head 8.

Cutting head 8 may, for economy of material' and convenience'in machining, be made up of several parts welded together, but is shownl in the drawing as an integral cyllnderwith the wall at its free end thickened and radially slotted to form a circle of comb-like teeth or prongs 8 extending rearwardly to an interior cross-partition I0 intermediately dividing the inner length of said head 8, and to an exterior guard ring II,

limiting .the distance said prongs .9 may be inserted into a nose or earcavity.

The outer end of head 8 is interiorly circularly slotted as shown at I5, beginning at the partition I0 and extending close to the outer endsl of prongs 9; the outer diameter of said slot conforming with the'inner diameter of the head 8,. rearward ofesaid partition, and forming a guideway extension of such inner diameter for a rotary shear knife thimble or cutter blade I6 as shown. This circularslot `l5 is interrupted by the spacings between said prongs 9, and forms hair cutting edges Il, Il on the side walls of said prongs for cooperation with said cutter blade I6 as hereinafter described.

The cutter blade I6 is shown in the form of a thimble shear `knife fitted within fthe cylinder head 8 and rotatablyand longitudinally movable in guide way I 5, as controlled by a cylinder cam 25, towhichit is secured by a screw bolt i8 engaging through an interposed washer I9 and an aperture 20 in the base wall 2l of said thimble.

A dowel pin 22 insures rotation of cutter bladel I8 with cylinder cam 25, and cutting teeth 23 are formed on the annular edge of said cutterblade I6. Cross partition I8 is shown asl apertured at 24 for insertion of a screw driver vto tighten and loosen screw bolt I8.

Cylinder cam 25 is mounted to rotate and move longitudinally ,in housing cylinder 5, and is formed with a cam groove 26 engaged by a' stud pin 21 set into the wall of said housing cylinder 5. Cylinder 25 is shown as receiving the end of a rotatable cam spindle 30, also formed with a y cam groove 3I engaged by `a stud pin 32 set into the wall of cam cylinder 25. The outer end of cam spindle 30 extends through apertured plug 6, and has secured to it a turn knob 32, as shown.

In order that cam spindle 30 may be turned 'I only in one direction, the drawing shows said spindle with an enlarged collar portion 35 rotatably mounted in housing cylinder 5, and having a cam recess 38 in which a pawl -roller v3I seats against a compression spring 38. When spindle 30 is rotated in one direction, pawl roller 3l seats at the base of its cam recess 36, but an attempt to reversely turn spindle 30 causes the pawl roller 31, under tension ofits spring 38, to rideup the cam face of its recess 38 so as to frictionally engage against the inner wall of housing cylinde r 5 and prevent rotation of spindle 30.

An imporant feature of my improvements, insuring positive and clean cutting of the hairs without danger oi pulling them out by their roots,

1S that the cutting blade` I8 shall both projectv and Yretract longitudinally and rotate across the cutting edges I1, I1 of the prongs 0, preferably in, a spiral projecting and straight retracting f cycle of' movement. To this end cam groove 28 and its stud 2l, and cam groove 3| and its stud 32 cooperate as they are rotated by turn knob I2, spindle '30 merely rotating, but cylinder 25,

to which the cutter'blare I6 is secured, both rotating and moving longitudinally back and forth in housing cylinder 5, so as to spirally project and retract cutter blade I8. This cooperative action of the cam grooves 26 and 3| insures positive spiral projection and retraction of cutting,

variety employed necessitating a cross-track guide way l5, is fully protected and safe from any danger of pinching or cutting the delicate membrane lining such cavities. The prongs Y9 are preferably rounded at their closed outer ends .as shown and smoothly finished` to facilitate entrance into a cavity without harm.

From the foregoing description, it will be clearly seen that `my clipper device is fool proof and safely cuts the hairs without pull or danger of harming the cavity membrane, which is sensitive and -subject to dangerous inflammations and disorders when injured.

The specic detail shown and described may of course bemodied within the scope of my invention as deflnedin the following claims:

What I claimis:

l. A rotary clipper device comprising a cylindrical cutting head having a circular series of spacedapart prongs each partially longitudinally slotted to jointly form a circular guide way for a cooperating cylindrical cutter blade mounted to rotate and move longitudinally in' said head, said prong slots forming longitudinal cutting edges, and said cutter blade having cooperating en d cutting teeth, and means for spirally projecting said 2. A rotary clipper device comprising 'a cylindrical cutting head having a circular series of V cutting teeth across said prong slot cutting edges.

va body orice.

4 amants forming a circular guide way within said prongs 'opening rearwardly into thel interior ofxsaid cylindrical cutting head, a cooperating cylindrical -cutter blade mounted in said head and rotatably and longitudinally movable in said guide way,

said prong slots forming longitudinal side wall cutting edges, said cutter bladehaving end cutting teeth cooperating with said cutting edges,

and means for spirally projecting and retracting said cutting blade in said guide way to move its cutting teeth across said prong slot cutting edges.

3. A rotary hair clipper device comprising a cutter head having a circular series of spaced prongs each partially longitudinally slotted to formspaced side wall cutting edges in the respective prongs and to cooperatively form a cylindrical guide way extending into and intermediately crossing said spaced prongs, and a cylindrical cutter blade mounted to rotate in said guide way and having end teeth progres-v sively passing through each prong so as to sever intermediate sections of hairs extending radially between said prongs. a

4. A rotary hair clipper device comprising a cutter head having a circular series of spaced sections of hairs extending radially b'etween said prongs, and a cam spindle mechanism having a turn knob for operating said cutter -blade in a succession of spirally projected and retracted rotary cycles.

5. In the construction set forth in claim 4, said cam spindle mechanism comprising a rotary cam spindle and a cooperating rotating and longitudinally movable cam cylinder secured to said, cutter blade, and said cam spindle having a ratchet mechanism to prevent'vreverse rotation.

thereof.

6. In the 'construction set forth ing'claim 3, l said cutter head having an exterior encircling guard ring defining its depth of projection into HIESTER SEIDRS.

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