US2119284A

US2119284A - Shaving mechanism

Info

Publication number: US2119284A
Application number: US198734A
Authority: US
Inventors: Meyer Frederick
Original assignee: Art Metal Works Inc
Current assignee: Art Metal Works Inc
Priority date: 1938-03-29
Filing date: 1938-03-29
Publication date: 1938-05-31
Anticipated expiration: 1955-05-31

Description

Ma 3.1,-1938. F. MEYER 2,119,284

SHAVING MECHANI S M Filed March 29, 1938 INVENTO R fkEDER/CK MEYER.

BY WM Z ATTORNEYS 10 tured guard to be pressed Patented May 31, 1938 7 Frederick Meyer, Union, N.

Metal Works, 1110., Newark,

of New Jersey 1., assignor to Art N. J a corporation Application March 29, 1938, Serial No. 198,734

5 Claims.

This invention relates to shaving mechanisms, more particularly of a type wherein an apertured guard member is pressed against and moved over the surface to be shaved, with a power-driven 5 cutting element operating within or beneath such ,guard to shave, oil the stubble as it protrudes through the apertures.

While a shaving mechanism was proposed many years ago of a'type having a circular aperinto contact with the face, and having a rotary cutting element bearlng against the interior surface of such guard, such devices have not enjoyed any substantial practical use. The present invention in its pre- 15 ferred form, while relating more particularly to mechanisms of this general character, has for its objects the elimination of certain difiiculties heretofore encountered with this type of device, and the provision of a simple, durable shaving 2o mechanism with which one may very quickly obtain an unusually smooth shave without danger of abrasion or injury to the skin.

Various further and more specific objects, features and advantages will clearly appear from the 5 detailed description given below, taken in con- 7 nectlon with the accompanying drawing which forms a part of this specification and illustrates merely by way of example, certain preferred forms of the invention. The invention consists in such novel features, arrangements and combinations of parts as may be shown and described in connection with the devices herein disclosed.

In the drawing, Fig. 1- is a side elevational view 35 of one form of shaving device embodying the invention; v

Fig. 2 is an end view showing the form of the guard and its relationship to the cutter in the device;

Fig. 3 is a view taken substantially along the line 3-4 of Fig. 1;

Fig. 4 is an enlarged sectional view of the head portion of the device;

Fig. 5 is an enlarged sectional view showing 45 further details within the head portion of the device and with the guard removed;

Fig. 6 is another enlarged view of the head portion of the device with the guard removed; and

Fig. 7' is a perspective view showing the cutter 50 member of the device.

Referring now to the drawing in further detail, the device may comprise a handle and casing portion 20 preferably formed of suitable rigid insulation material such as a phenol-formaldek 5B hyde condensation product. This handle may be split along a longitudinally extending plane as at 2| (Fig. 3) and may be made hollow for receiving a suitable electrical motor 'as indicated at 22, having a shaft 23 handle and upwardly into the head portion of the device. Suitable plug and socketelectrical power connecting means as at for the motor, may be provided at the lower end of the handle.

The shaft 23 may be providedwitha knurled wheel as at 25 protruding throughan aperture formed in one of the halves of the casing portion near the head of the device, whereby in case the motor is not self-starting, it may be readily started by moving ones finger over such knurled wheel.

The head portion of the device may comprise a rigid casting 26 serving as an enclosure for the upper end of the shaft 23, and support for the guard, as hereinafter described. This casting may have a lower portion of generally rectangular shape as 21 terminating in a tongue portion adapted. to be received within a corresponding groove formed in the ing complementary halves of the handle. Two or more small pins as at 28 may extend through the portion 21 and adjacent portions of the handles for securing the casting. 28 against removal, except when the halves of the handle are separated. The handle portions may be removably secured together with the motor and shaft therein as by the use of suitable screws as at 20.

A circular guard member 30 may be secured to the upper end of the support 26. The outer surface of the guard member 30 for contacting with the skin to be shaved may be substantially fiat and of extremely thin relatively rigid sheetlike material formed with numerous apertures such as radially extending slots 3| at its peripheral areas, these slots being of suflicient width to properly admit the stubble, but just insufilcient to permit the skin to enter and be injured by the cutter. As shown, the slots may extend to the very periphery of the guard member 30, thus providing open-ended slots (see Fig. l) permitting free entrance of the stubble when the guard is moved over the skin to be shaved. In order to strengthen the guard at the inner ends of the radially extending slots, such inner ends may be closed bya continuous narrow annular area as at 49. The central area of the guard may be left largely open or if desired, as shown, four or more radially extending arms or braces as at 50 may extend from the annular area 49 to a central rigid area 5|. The area 5| will serve extending axially of the upper ends'of the adjoinfor a short distance into the l to cover the central area of the cutter member to prevent the skin from contacting therewith.

A rotatable cutting member 32 may be mounted within said guard member so as to be concealed, covered and protected thereby. The cutter member may be apertured as at 33 at its mid-portion so as to be pivotally mounted on a cotter pin or the like 34, extending transversely through a slot 33' in the upper end of the shaft 23 (Figs. 4 to 6). The upper end of the shaft 23 may be split as shown to receive the cutter member 32, and also provided with a small longitudinally extending cylindrical aperture for slidably receiving a small pin 35 having a rounded upperend bearing against the cutter member and having its lower end yieldably supported as by a spiral spring 36. This arrangement is such that the cutter member is yieldably pressed against the inside surface of the guard with a substantially uniform pressure throughout the length of its cutting edges 38. The spring 36 is preferably received within the end of the shaft 23 (Fig. 5) so that the spring which may preferably be quite delicate and highly yieldable, is housed and protected by the walls of the shaft against being interfered with by the cutting. Also the spring in this position permits of a compact arrangement of a longer spring than would be possible if the spring were outside the shaft where it would interfere with the shaft bearings unless the device were unduly elongated. As shown, the upper end of the shaft 23 may be mounted within a small cylindrical brass or bronze bearing piece as at 26', fixed within the casting 26.

The cutting element 32 may be suitably shaped to provide a fan action for purposes hereinafter more fully explained, as well as to strengthen the construction. For example, the lower outer corners 31 of the cutting element may be bent in opposite directions respectively from the plane of the remainder of the cutting element, i. e., in a direction so as to produce a downward draft of air.

The guard member may be detachably secured to the casting 26 with a threaded engagement as indicated at 40. The outer lower edge of the guard member may be knurled as at 4| to facilitate screwing the guard member into place or removal thereof.

While the active portion of the guard member is preferably made as thin as possible of sheetlike material comprising, for example, hard tool steel of preferably uniform thickness, the outer supporting ring for the guard member is preferably made considerably thicker so as to form a rigid support strengthening the guard against flexure or breakage. The inner surface of the cylindrical portion of the guard member may be partially cut away as by the use of perforations as at 42, enabling the cuttings to more freely pass from the upper edge of the cutter downwardly and out through apertures as at 43 formed at the base of the cylindrical portion of the head of the device and adjacent the sides of the rectangular portion 21.

The rotary form of cutter in the preferred 4 form of this invention eliminates the necessity for any reciprocating, vibratory or oscillating parts, as well as avoiding cam mechanisms and the like. Hence unpleasant chattering or vibration of the device against the hand and face of the user are avoided, as are also troubles due to friction, heating and wearing of cam surfaces and the like. In short, the construction provides a compact smoothly rotating shaft and cutter structure of exceptional simplicity and durability.

While the revolving cutting element as shown may comprise a rigid element of hardened steel insuring long wear with efiicient cutting, the pivotal and yieldable support by which it is affixed to the shaft, insures that both arms of the cutter will uniformly bear against the inside guard surface even though the cutter edges and guard may not be perfectly machined or in exact axial alignment as assembled. At the same time, if one of the arms of the cutter should encounter an unusual obstruction projecting through an aperture, such arm will be free to yield somewhat due to the spring support of the cutter without jamming or unduly slowing the motor.

The formation of the cutter arms with angular or bent lower corner portions, gives to the cutter a fan action for expelling the cuttings through apertures 43, thus preventing the cuttings from passing back through the apertures and smearing over the skin. This is particularly advantageous in case the skin is covered with perspiration, which would otherwise cause the cut hair to adhere to a troublesome degree. The fan action also provides a draft of cooling air through the head of the mechanism at such times as the guard apertures or portions thereof are uncovered. When substantially all of the guard apertures are covered by the skin, the fan action tends to provide a suction effect promoting the entrance of the stubble areas into the slots. This application is a continuation in part of applicant's copending application Ser. No. 189,554, filed February 9, 1938.

While the invention has been described in detail with respect to particular preferred examples, it will be. understood by those skilled in the art after understanding the invention, that various changes and further modifications may be made without departing from the spirit and scope of the invention, and it is intended therefore in the appended claims to cover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent is:

1. Shaving mechanism driven rotatable shaft, a a cutting edge extending an end of said shaft, said'member being fixed to rotate with'said shaft by a pivot member, the axis of said pivot member also extending radially of the shaft but transversely of said edge, and an apertured guard member having an interior surface extending transversely with respect to said end of said shaft and comprising a surface of revolution against which said edge bears.

2. Shaving mechanism including a powerdr ven rotatable shaft, a cutter member having cutting edges extending generally radially to each side of an end of said shaft, said member being fixed to rotate with said shaft by a pivot member permitting pivotal movement of said cutter memher about axes transverse to said shaft, and an apertured guard member extending generally at right angles to said shaft having an interior surface comprising a surface of revolution against which said edges bear.

3. Shaving mechanism including a powerdriven rotatable shaft, a cutter member having cutting edges extending generally radially to each side of an end of said shaft, said member being including a powercutter member having generally radially from fixed to rotate with said shaft by a pivot member 75 permitting pivotal movement of said cutter memher about axes transverse to said shaft, an apertured guard member having an interior surface extending transversely with respect to said end of said shaft and comprising a surface of revolution, and spring means causing said cutting edges to bear against said surface.

4 Shaving mechanism including a powerd-riven rotatable shaft, a cutter member having a cutting edge extending generally radially from an end of said shaft, said member being fixed to rotate with said shaft by pivotal means, the axis of said pivotal means also extending radially of the shaft but transversely of said edge, an apertured guard member having an interior surface comprising a surface of revolution against whic said edge bears, and spring means within the end of said shaft causing said edge to bear against said surface.

5. Shaving mechanism driven rotatable shaft, supporting means surrounding said shaft, a circular guard member fixed to said means and adapted to be pressed against the skin to be shaved and with the shaft including a powerf directed endwise toward the skin, and cutter means within said guard, said supporting means including a portion of a generally rectangular cross section merging'into a generally cylindrical portion extending longitudinally of said shaft for receiving said circular guard, an outlet opening for the escape of cuttings from within the guard, being formed at the base of said cylindrical portionand adjacent a side of the rectangular portion.

FREDERICK MEYER.