US2648902A - Hair cutter - Google Patents

Description

J. PETERSEN HAIR CUTTER Filed July 17 1951 mu, .y

AIN VEN TOR.

JOHN 'PETERSEN Patented ug. 18, 1.9553

UNITED STATES PATENT OFFICE .HAIR CUTTER John Petersen, NewarkyN. Jr

Application July 17, 1951, SerialNo. 237;-221;

1 Claim. 1

This invention relates to hair cutters and more particularly to an electric motor operated rotary hair cutter.

An object of the invention is to provide a rtary hair cutter, which is relatively simple in construction, light in weight and is of a safety construction so that it may be easily moved over and about the head of a person for cutting their hair without danger of cutting or injuring the person. f

Another object of vthe present invention is to provide a hair cutter as specified, which includes a motor driven rotor having a plurality of straight cutting blades thereon projecting radially from the rotor and lying in a plane parallel to a plane bi-secting the axis of the rotor through their entire length, which rotoi` coopcrates with a stationary cage having a plurality of hair receiving slots therein the edges of which are sharpened to cooperate with the blades to provide cutting of the hair.

With these and other objects in View, as may appear from the accompanying specification, the invention consists of variousv features of construction and combination of parts, which will be rst described in connection with the accompanying drawings, showing a hair cutter of a preferred form embodying the invention, and the features forming the invention' will be speciiically pointed out in the claim.

In the drawings:

Figure l is a longitudinal section through the improved rotary hair cutter.

Figure 2 is a cross section through the hair cutter taken on the line 2--2 of Figure 1.

Figure 3 is a cross section through the hair cutter taken on the line 33 Iof Figure 1.

Figure 4 is a perspective view of the stationary cage.

Figure 5 is a perspective view of the rotor.

Figure 6 is a cross section through the rotor taken on the line 6-6 of Figure 5, and

Figure 7 is a detail View of a fan carried by the rotor for blowing the cut hair out of the cage.

Referring more particularly to the drawings, the hair cutter includes a rotor I having a cylindrical core 2 on each end of which are provided stub shafts 3 and 4. The stub shaft 4 is elongated to provide a driving shaft section 5 which is connected by any suitable type of coupling mechanism indicated in dotted lines at 6 in Figure 1 of the drawings to the shaft 1 of an electric motor 8 for rotating the rotor I.

A plurality of cutting blades 9 are carried by the rotor I, and as shown in Figures 5 and 6 of the drawings-,two of the blades 9 are DFO- vided, being disposed diametrically opposite to each other, extending radially from the core 2 andl being straightthroughout their entire length. That is, the blades 9 extend throughout their entire length parallel to a plane bisecting .the axis of the rotor. I`. .It has been the practice in the prior art to spiral the cutting blades so as to provide, a shearing action in the cutting of hair but it isy extremely difcult, eX- pensive and impractical tomake spiral blades of such small size as used in a cutter of this type and,.,furthermore, sharpening and honing difcultiesare encountered with spiral blades, all of which .are eliminated by the use of the straight blades Iwhich .can beeasily manufactured, ground/and honed on the same typeof machines and made in the same manner as various types of safety razor blades.

The rotor I is positioned Within a cage lil in the form of a cylindrical shell which is attached in any suitable manner to the electric motor 8 coaxially therewith as clearly shown in Figure 1 of the drawings. bearing block I I mounted in its outer end which is cut away to provide hair escape openings I2 to permit hair to be blown out the end of the cage. A roller or ball bearing I3 is carried by the bearing block Il and receives vthe stub shaft 3 of the rotor I. To prevent longitudinal slippage of the stub shaft 3 in the bearing I3 the stub shaft may be provided with a threaded opening which receives a locking screw It. The screw I4 threads through the axial portion I5 of the bearing block II and clamps the bearing I3 firmly against the end of the core 2 of the rotor.

A second bearing block I6, which is in the form of a disc, is mounted in the opposite end of the cage I0 from the bearing block II. This bearing block I6 is recessed as shown at I'! to receive the ball or roller bearing I8. A clamping collar I9 is mounted on the shaft 4 and serves to properly space the rotor I, hold the bearing I8 in place and hold a fan blade structure 20 tightly in position upon the shaft 4 against the shoulder 2I formed on the shaft.

The cage I0 has a plurality of slots 22 cut therein which slots gradually increase in size about the perimeter of the cage as clearly shown in Figure 2 of the drawings. The edges of the slots '22 are sharpened to provide sharpened edges for cooperating with the sharpened edges of the blades 9 to cut hair. To provide the proper shearing 'action between the cutting edges.

The cage I has a of the slots 22 it will be noted that the slots 22 are disposed at an angle relative to a plane or planes bi-secting the axis of the cage so that as the blades 9 are rotated they Will progressively sweep across the sharpened edges of the slots 22 to provide the desired shearing action for cutting hair.

The cage lll has a plurality of notches 24 cut in its end corresponding to the slots 22 and forming indexing means whereby therotor may be positioned in predetermined relationship to any of the slots. This indexing of the rotor` is provided by means of an indexing plate 25 carried by the bearing block I6. The indexing plate 25 has a tongue 25 formed thereon for fitting in any one of the notches 24. A set ,screw 2'! Y is provided for attaching the indexing plate to the bearing block provided with a, plurality of openings 28 extending therethrough. The fan blade 2U is shaped so that during operation of the device it will project a blast of air longitudinally through the cage for blowing the cut hair outwardly through the openings I2.

By disconnecting the coupling 6, removing the cage l2 with its connection with the motor 3 and removal of the screw I4, the cutting parts of the rotary cutter may be easily disassembled for cleaning or sharpening of the cutting blades.

From the foregoing description, taken in connection with the drawings, it will be apparent that a rotary hair cutter has been provided which is practical, comparatively simple in its construction, and one which can be manufactured readily at a comparatively low cost over the type of rotary hair cutters embodying spiral cutting blades and straight hair receiving slots in the cage.

The bearing block lfis It Will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown, but that they may be widely modified Within the invention defined by the claim.

What is claimed is:

In `a hair cutter, a rotor, means for rotating said rotor, a stationary cage enclosing said rotor, said cage having a plurality of elongated longitudinally extending. slots therein and disposed at an acute angle to a plane bi-secting the axis of the cage, a pair of radial diametrically opposed cutting blades carried by said rotor, said blades being straight and parallel throughout their entire lengths to a plane bisecting the axis of the rotor, the slots in said cage being of different widths and gradually increasing in Width from the narrowest slot to the Widest slot, and cutting edges at each side of the slots to coact with said blades, means for connecting said cage to a motor, a stub shaft on each end of said rotor, and bearings for said stub shaft carried Wholly by said cage.

JOHN PETERSEN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,251,925 Scheithe Jan. 1,-1918 2,220,800 Jepson Nov. 5, k1940 2,253,016 Collins Aug. 19, 1941 2,289,323 Dettle July '7, 1942 2,292,931 Dicke Augbll, 1942 FOREIGN PATENTS I A Number I Country Date 511,672 Great Britain Aug. 22, 1939

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