US2296094A - Shaving device - Google Patents

Description

Patented Sept. 15, 1942 UNITED STATES PATENT OFFIC 2,296,094 siinvnvo DEvibii Godfrey Dallro witz; lirooklyn, N. assignor to American fiafety Razor Corporation, Brooklyn,

N. Y., a corporation of Virginia Application July 23", 1937, seri'a vo. 155L178 (cl' abie) '9 Claims; This invention relates to shaving devices and in particular to shaving deviceslinwhich the shaving operation is effected by the interaction of relatively movable cutting edges so as to effect the cutting or shearing of hairs passing between them, t a

While my iht'efitidh has b disclc sea in relation to shaving dev" esit will; he udder stood that as" to when phases thereof itmay have other applications. I h 7 he th'" general objects "of my invention" is the provision in a'shavih'g dei'rice'of a construction in which to efficiency of action and convenv l d ease QfJ Q Q e iQP ar Wd- W costof manufacture, of operation, and of ma'ihtenance. I For the, attainment of these objects and suchother objects as will hereinafter appear or be pointed out I have shown an 1111151; melee: my invention" in the drawin E t l mentof my ihv'entiong v Figure 2 is a longitudinal through the shaving head oflihg l stantially onthelihe 2+2 of Figure 9'; looking in the directionofithe anawsg Figure}; isa'plan'v wth' eh'f'f Figiite 4 is a SBCtlOIIaLYIGWQ en" "sen-1' r scalefsuhsftaritially the l ii'1f4---4 eff Fi'g lookii'i'g in the direetioh' of the" arrowsj Figurefi isa viewin per of the shaving neaa'brr'euge F gures a p er; 2' illustrating the conform teeth of the shaving he Referring to the dfiawing; it will be o serves that I shew at A a shaving head inoiiii ted i' handle 13 er, when .i' piwv m in ii f i my invention, may beof any sul able or preferred type, such as, for example, a c t ng enclosihg an electric motor roiactua'ting the parts of my shavj 'gh'a' d y. t. j

The shaving head A--co'mprises--in genral a fixed part and a movable part, and ea'ch of these parts is provided: with cuttingnteethgthe edges;

shearing or clipping e dnanaa wh l i sl s t. Q a page block 24 by means such as pins or screws 34.

'lis' aperspctive" view of said fiitdai on ofthe f xed cutting a P 691? 241 b P abated. te ates bight portion 28 5601 11:9 11 any; suitable or preof the moi'rable cutter 36. r

As an ears very clearly from Figure 4, the shear plate 20 is shown as having a centrally located channel portion 38 within which is located the bight portioh 28"o f the aforementioned U- shaped member 26 and it will be noted that the depth of the channel portion 38 is shownas such that the upper surface of the portion 28 is substantially flush with the top of the shear plate.

Extending laterally on each side of th e channel portion 38, just described, are shown;hori

zontal'portions which are traversed by slots 40 that'break up these portions into the teeth 22,

already referred to. These slots and teeth are continued into verticallydisposed portions of the shear plate that depend from the aforementioned horizontal portions, andthe extreme sides cfthe shear plate are formed by a pair of flanges 42 extending outward from the lower ends of the aforesaid vertical portions. I The teeth 22 are provided with cutting edges on their inner surfaces, where these surfaces intersect the slots, and for'the purposeof obtaining a close shave, the teeth 22 may'be made very thin, while to counterbalance the weakening of the shear plate due to its thinness, reinforcing por tions 44 may be provided. It will be seen that the shear plate heproduced from sheet material, which will tend to lower production costs, the reinforcing portions in this case having the thickness of the original sheet, while the teeth 22 have a portion thereof ground away.

Within the downwardly opening channels, resuiting from the shear plate configuration just described, are slidably' positioned the cutting teeth'46 of the movable cutter 36; the upper or inner surface of'which may be described as being complementary to the inner surfaceof the shear plate, and this cutter comprises besides the teeth 46 already mentioned, a central portion 48 having'frecesses 50 at its ends within which are received the legs 32 of the aforementioned 1 U shaped'mernber 26, and which permit the'cutter torecipro'cate freely, and with anopeni'ng 52, adapted to receiye the end of a lever saxtefiaing from'the casing or handle 3 and through an opening 51 in the base block 24, by which movement is imparted to the cutter 35.

The cutter 36 is further provided with flanges 56 extending outwardly from the teeth 46 and positioned beneath the aforementioned flanges 42 of the shear plate.

Openings 58 are provided between the teeth d6, through which the shaving waste may escape from the cutting area, that is from the contacting surfaces of teeth 46 and 22 through the cutter 38 and to a point exterior to the shaving head. It will be understood of course that the teeth ii; are formed with cutting edges at those points where they contact with the teeth 22 of' the shear plate.

In the operation of the device it will be bserved that as the shaving head is moved over the face or other surface to be shaved in the general direction of the slots 46, that hairs will enter the vertical portions of said slots and will finally reach the cutting zone where the teeth 22 and 46 interact. Due to the height of the aforementioned vertical portion it will be seen that relatively long hairs may enter the slots 49 without bending. It will further be observed that due to the wider spacing of teeth 46 the slots 49 will seldom be obstructed, and the hairs may pass with comparative freedom into the cutting zone, and the severed hairs will pass through openings 58 between the teeth 45 of the movable cutter to the exterior of the shaving head...

In order to subject as many hairs as possible to the cutting action, I have further shown the vertical portions of the slots, which are at the same time the entrance portions thereto, with widened entrance portions, as may be clearly seen from Figure 6, which is a plan view on an enlarged scale of the teeth, 22 and it will be observed that the teeth 22 are shown as divided along their length into three zones designated as a, b, and 0 respectively. The firstof these corresponds to the tooth portions lying within the cutting zone, that is those portions overlying the teeth 55 of the movable cutter, and it will be observed that the intermediate slot portions are relatively narrow and substantially of uniform width.

The portions 17 form a continuation of the portions (1, but they lie outside of the cutting zone,

and form a region of transition between the portions a and the outwardly tapering portions 0 of the teeth, and serve to prevent the flesh from entering the cutting zone.

The slots 3%} are correspondingly divided into three zones at, y and z, the first lying in the cutting zone, the second lying outside of the cutting zone, but being of substantially the same width as the zone :13, while the third, 2, is flared outwardly and serves to receive in its wide mouth, a

The proper functioning of the device is obvi-.

ously dependent on shearing contact between the fixed and the movable cutting teeth, and for the purpose of securing such contact I have shown means in the form of a plug or plunger 58 slidable in a recess or bore 62 within the base block 24, which is closed by set screw 64. Between the latter and the plug 60 is positioned a compression spring 66 that serves to urge the plug 60 against the lower wall of the movable cutter 36, thereby pressing it against the shear plate.

It will further be observed that to insure contact at the desired place, that is at the cutting edges, I have shown at 60a in Figure 4, the portions of the movable cutter other than at the cutting teeth as spaced slightly from the opposed shear plate surfaces, which serves to reduc friction, to compensate for wear in the cutting teeth and prevent undesired contact of these surfaces, which might prevent contact of the cutting teeth.

While I have herein disclosed one embodiment of my invention it will be understood that the same may be embodied in many other forms without departing from the spirit thereof, as will be obvious to those skilled in the art, and that the disclosure herein is by way of illustration merely and is not to be construed in a limiting sense, and that I do not limit myself other than as called for by the prior art and the scope of the claims.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is;

1. In a face engaging shear plate for a dry shaver a side wall, a lower flange extending laterally outward from the lower edge of said wall and having a free outer edge and an upper wall extending inwardly from the upper edge of the wall, said upper wall and a portion of saidwall extending for a substantial distance below the lower surface of said upper wall being transversely slotted.

2. In a face engaging shear plate for a dry shaver a side wall, a lower flange extendin laterally outward from the lower edge of said wall and having a free outer edge and an upper flange extending inwardly from the upper edge of the wall said upper wall and said wall being transversely slotted.

3. A dry shaver having a base, a guard member provided with a central channeled portion U-shaped in transverse cross section and having two rows of parallel teeth projecting laterally from the free edges of the channel of said channeled portion, means free at its outerportion uniting the outer edges of said teeth and a U- shaped member having its intermediate section secured within said channel and its legs received within a channeled portion in the base member, the end of at least one leg being pivoted in the base member, and a movable cutting member adapted to coact with said stationary cutting member in a clipping action, positioned between said stationary cutting member and said base.

4. In a dry shaver, a stationary cutting member provided with a longitudinally extending channeled portion, and toothed areas extending laterally on each side thereof, each of said areas comprising a horizontal portion immediately adjoining said channeled portion, a vertical portion extending downwardly from the free end of said horizontal portion, and a horizontal portion extending outwardly from the free end of said vertical portion, and said first named horizontal portion and said vertical portion being traversed by slots so as to form transverse cutting teeth while said second mentioned horizontal portion is unslotted, whereby it serves to unite and to rigidify said cutting teeth, and said second horizontal portion being supported only from the vertical portion,

5. In a dry shaver, a stationary cutting member as set forth in claim 4, having a solid reinforcing member secured in place within said channel portion.

6. In a dry shaver, a cutting member movable relatively to a second cutting member, said movable cutting member comprising a central horizontal portion, a row of teeth, on each side of said central portion and extending above the plane thereof, and a horizontal portion serving to unite the bases of the teeth of each row extending outwardly from the lower, outer surfaces of the teeth of each row, said last named portion being supported only by said teeth.

7. In a dry shaver, a stationary cutting member as set forth inclaim 4, in combination with a relatively movable cutting member, said movable cutting member comprising a central horizontal portion, a row of teeth, on each side of said central portion and extending above the plane thereof, and a horizontal portion serving to unite the bases of the teeth of each row extending outwardly from the lower, outer surfaces of the teeth of each row, said last named portion being supported only by said teeth.

8. In a dry shaver a stationary cutting member as set forth in claim 4 and having a solid reinforcing member secured in place within said channeled portion, in combination with a relatively movable cutting member, said movable cutting member comprising a central horizontal portion, a row of teeth, on each side of said central portion and extending above the plane thereof, and a horizontal portion serving to unite the bases of the teeth of each row extending outwardly from the lower, outer surfaces of the teeth of each row, said last named portion being supported only by said teeth.

9. In a face engaging shear plate for a dry shaver a side wall, a lower flange extending laterally outward from the lower edge of said wall and having a free outer edge and an upper wall extending inwardly from the upper edge of said wall, said upper wall and a portion of said wall extending for a substantial distance below the lower surface of said upper wall being transversely slotted, the portions of the slots on the slotted side wall having their outer ends widened by removing the material bounding said slots.

GODFREY DALKOWITZ.

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