US2242752A - Shaving apparatus - Google Patents

Description

,May 20, 1941. 2 F, MEYER 2,242,752

snmime APPARATUS Filed May 4, 1958 m 19 20 HIIIIIIIIIIMMD INVENTOR 70 fREDER/CKAZSYER ATTORNEYS Patented May 20, 1 941 SHAV-ING APPARATUS Frederick Meyer, Union, N. J., assignor to Art Metal Works, Inc., Newark, N. 3., a corporation of New Jersey Application May. 4, 1938, Serial are, 205,886

1 Claim. (01. 30-43) 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 cutting element operating within or beneath such guard to shave oil the stubble as it protrudes through the apertures.

More specifically, this invention relates to var-- ious improvements adapted for use for example, in shaving mechanism of the general class described and claimed in my Patent No. 2,217,519,-

granted October 8, 1940, on application Ser. No. 189,554, filed February 9, 1938. Y

The objects of the present invention include the provision of improved angularly movable cutter elements cooperating with the apertured guard of shaving mechanisms such for example as of the above indicated character.

Various further and more specific objects, features and advantages will clearly appear from the detailed description given below, taken in connectionwith the accompanying drawing tremely thin perforated sheet metal area as at id designed to be pressed against the skin from which the stubbleis to be shaved, and whereby the stubble may protrude through the perforations and be engaged by a cutter member it. In the form of the device here shown, the cutter member- I is angularly moved over the inside which form a part of this specification and illustrate merely by way of example, certain preferred forms of the invention.

In the drawing Fig. 1 shows the head portion partly in section, of one form of shaving device, in which the features of this invention may be embodied;

Fig. 2 is a view showing the device of Fig. 1, but taken at right'angles to the position shown in Fig. 1, and with the apertured guard removed;

. Fig. 3 is a side elevational view of a cutter member embodying certain features of the present invention;

Fig. 4 is a sectional view taken substantially along the line 44 of Fig. 3;

Fig. 5 is a top view of an alternative form of cutter member embodying certain features of the invention; and

surface of the guard by reason of means mounting the cutter on a'rotatable shaft i5 extending.

down into the handle to the motor or other source of power. The cuttings thrown 01? from the cutting edges of the member It may pass out of thehead of the device as through apertures ll located at the base of the circular portion of the member, H, and at each side of the rectan gular portion I2.

As more fully shown in Fig. 2, the cutter member 18 may be formed at its mid portion with a vertically elongated aperture 18 for receiving,

a pin 19, which pin also extends in a radial direction through the upper end of the-shaft IS, the shaft being slotted as shown to receive the cutter member. The cutter member may be yieldably pressed upwardly into engagement with the inner surface of the guard-by a coil spring 20 mounted within the upper end of the shaft and pressing against a pin 2| having a rounded upper end, against which the cutter member tiltably bears.

Referring now to Fig. 4, it'w'ill be noted that the cutter member I6 while made of a strip of sheet metal, has an upper edge 22 ofsubstantial width for hearing against the inner surface of the guard, as the cutter is rotated by the shaft IS. The use of a cutter having such a bearing edge of substantial width is advisable so that the cutter will move freely over the perforated guard surface without undue wear, either of the guard member or the cutter member. Yet a cutter memberhaving such an edge of substantial width of course precludes the use of an upwardly di- Fig. 6 is a side view of the device shown in Fig. 1 with the protective cap shown in [section as applied over the guard member thereof.

Referring now to the drawing in further detail, the devicemay comprise a handle portion I. which may contain an electric motor or other source of power. A head portion ll for the device may be suitably secured as by mortise and tenon means as at 12 to the handle portion. A a circular guard member It may be mounted on the member H and removably secured thereto as by the threaded engagement as shown. The particular form of guard member here shown may comprise a somewhat dome-shaped and exedge. In considering the various ,difliculties in rected sharpened edgefor cutting the stubble, and in fact such an upwardly directed sharpened edge would soon be subject to substantial wear resulting in a somewhat rounded and ineffective volved in providing a cuttermember with a permanent and effective cutting edge, I'have, after extended experiments, discovered that by undercutting the side surfaces of the cutter memher, as at 23 and 24, one may readily provide very effective and durable cutting edges or corners as at 25 and 26. That'is, with such underwith relatively sharp acute angles as shown. Yet

the corners 25 and 26 are not so sharp as to be readily injured. And it will be observed that even though the surface 22 comprising the upper edge should become worn down in use, it will still continue to join the side surfaces with suitable sharp acute angles. It has been found that if the undercutting is done in the form of channelshaped grooves, the cross sections of which are substantially arcuate as shown, that the cutting effect is very substantially improved as compared with a cutter without such undercutting and that Y the resulting relatively sharp corners as at 25 and 28 are maintained notwithstanding long use of the device.

In Fig. 5 an alternative form of cutter member 16' is shown and which may be made similar to that of Fig. 3, except that the cutter memher is bent in directions perpendicular to its side surfaces, .whereby the upper edge 22' engages the inner guard surface along a curved .path. In the particular form shown in Fig. 5,

the bending is such that the cutter member assumes a smoothly curved s-shape. Fig. 4 illustrates a cross-sectional view of the cutter of Fig. 5 as well as that of Fig. 3. In some cases a cutter member bent as in Fig. 5 will rotate more smoothly and free of chattering, inasmuch as the points of contact between the cutter and theguard will not be confined substantially to a straight line. That, is with the cutter of Fig. 5 the points of contact with the guard will be so distributed that the cutter will not tilt or vibrate 'to and from a' right angle-position in respect to the guard surface.

As shown in Figs. 1 and 6 the periphery of the guard member may be formed with a groove as at 21 for permitting engagement with a quickdetachable cap member 28. That is, a cap memher as at 28, formed for example of a suitable condensation product, may be provided for cove erlng and protecting the thin perforated guard surface when not in use. This cap member may have a rim 29. within whichan internal circular groove in may be formed. A circular orsomewhat polygonal ring of spring wire it may be tioned'patent.

While the invention has been described in detailwith respect to particular preferred examples, itwill'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 scopeof the invention, and it is intended therefore in the appended claim to cover all such changes and modifications.

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

Shaving mechanism comprising a guard of thin sheet material adapted to have one of its surfaces pressed against the skin to be shaved,

said guard being arcuately curved in at least one dimension and being formed with numerous small circular perforations for admitting hairs, and a cutter member for engaging the opposite surface of said guard, means for supporting and angularly moving said cutter member over said latter surface, said cutter member comprising a sheet metal strip having an edge of substantial thickness bearing against said latter surface and saidistri-pextendingin a plane substantially normal tdthe .vario'us portions of said latter surface as same come into contact therewith, the sides of said-strip being both formed with a groove of'substantiall'y 'arcuate cross section along said edge,- on'esidenf each of said grooves terminating-at-saidmdgeand forming a relatively sharp aiitQan'gIe-With the surface comprising said edge. I i I I'. FREDERICK MEYER.

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