US2354657A - Shaver - Google Patents

Description

Patented )Al/'13. l', 1944 easiest UNITED STATES PMENT oFFi cs 2.35am 'g Apphctilggmgeilhl4,361

25 Claims.

, eiiicient and capable of low cost production and includes also other featuresindividually and in combination, as will be pointed out.

In the accompanying drawing, Fig. 1 represents a preferredform of the new device in its closed condition; Fig. 2 represents it in its operating condition in side and end elevation respectively; Fig. 3 is a broken-out perspective illustrating the relation of the frame and cap; Fig. 4'

is a top plan, partly in section, of the core of the shaving head with blade removed; Fig. 5 is an end' elevation of Fig. 4; Fig. 6 is a plan of the razor blade; Fig. 7 an end elevation thereof; Fig. 8 being a detail: Fig. 9 is an enlarged cross-section of the shaving head; Fig. 10 a similar scale broken-out elevation thereof; Fig. 1p1 is a partial perspective of a modied form of core; and Fig. 12 an elevation of the frame arm in which it is held.

The device comprises a frame i, carrying the shaving head. and a case 2 in which it is housed and protected when not in use. These two members are dimensionally correlated so that by inserting the frame, base first, in the cap, the latter constitutes a practical handle for the use of the device. It is convenient of use because the iiatwise dimension of the cap is in the same plane as the shaving head and at right angles to the direction of the shaving stroke. Irrespective of other features, this cap-and-handle arrange-2 y ment is characteristic of the new device.

The frame I is made of a at sheet metal blank punched and bent to U-shape. It is perforated at its ends to receive and hold the ends of the shaving head, presently described, which is introduced therein by slightly spreading the arms and allowing them to clasp the head by their own resilience. In this way the head is easily removable when it is desired to change the blade, as will presently appear, this being also one of the novel characteristics of the new device independent of the particular design of the head and other parts. The base of the U-irame is slitted and bulged to form a ringer-nail grip 3 by which `the frame may be withdrawn from the case.

When the base of the frame is yintroduced into oi' its notches l, on a guiding rib 5 formed on the sidewall of the case and comes to rest on the shoulder 6, thereby preventing the full entry of the frame into the case in this reversed position and holding the shaving head in a proper pro-v the interior surface of the case and provide the necessary'friction.

The shaving head comprises a base or core marked 8 which is the part immediately clasped and held by the spring arms of the frame. It is shouldered at its ends and non-circularly shaped to fit in the non-circular apertures in the frame arms, so that itis held in a I'lxed position therein and cannot rotate. The function of this core is to support the razor blade 9 and the rolling shield l0, preserving a proper relation between these parts.

For supporting the blade the core is doublechanneled, in the longitudinal sense, to form an intermediate blade-supporting rib Il extending from end to end of the head. The razor blade 9 is attached to a saddle I2 which lits snugly on the rib and holds the blade in iixed position. The method of attaching the blade to the saddle is indicated in Fig. 8, The end lugs i3 on the saddle part are turned up into the end notches of the blade and clenched The blade is doubleedged and, as thus mounted on the rib li, it is within the general cylindrical contour of the core and each edge overlies the adjacent channel, and

such channels extend the full length ofthe head, so that the cuttings they receive canA be easily dislodged as by blowing through them.

The shield i0 rides orrotates directly on the surface of the core and, except at' its extreme ends, is reticulated with many perforations, the purpose of which is to allow whiskers upstanding from the skin to project through the shield and thus reach the razor blade to b'e'cut oil thereby.

On this account the perforatlons are made as close together as possible, providing maximum Whisker entrance; also, they are made square or polygonal in contour, rather than round, for the same reason. Desirably also, they are arranged the case, it rides, and is steadied by one or both in a. spiral path around the' shield so that all parts of the cutting edges are made available for shaving action. With this organization of holes, the body of the shell consists of a network of narrow bars separating adjacent holes, al1 of the same width, and constitutes a flexible and particularly efficient form of rotary shield to be rolled on the skin.

The shield is thin and, with its many perforations.- is fragile and quite incapable of itself withstanding the pressure of normal use or even safely withstanding the effects of ordinary handling, for which reason the core and blade are so shaped and constituted as to support it throughout its whole length and substantially its whole circumference, thus guarding against any flexing likely to result in permanent deformation. The shield can be made of hard brass with a moderately loose fit on the core, allowing it to move freely thereon and as thus arranged it is pressed against the razor blade, in effective shearing relation thereto, only when it is being rolled on the skin; normally, which is to say when the device is not in use, the shield and blade are not so pressed together and may not even be in contact (see Fig. 9). To reduce the friction the surface of the core is made smooth and polished, and desirably plated with a non-corroding metal. Further'reduction of friction is obtained by circular-ly ribbing the core, as indicated in Fig. 4, so that the shell rides only on The grooves bethe smooth tops of the ribs.

8 in Fig. 4, aid in tween these ribs, indicated at discharging cuttings.

Where .the shield spans receive the cuttings, it is supported on the blade itself as shown more clearly in Fig. 10;.. which is to say, it bears on the two edges of the blade and is thus, as already stated, practically continuously supported for its full circumference; at least those portions of it which are without support are of such short arc as not to give rise to anypermanent distortion from normal pressures. The rubbing of the shield on the blade edges, incident to this contact, 'does not dull them; it may tend to keep them sharp.

As will be understood, the device is used by rolling the shield back and forth on the skin which, of course, rotates the shield alternately in opposite directions with respect to the blade, thus shearing the whiskers which project through the perforations on each stroke. Slippage of the shield, instead of rolling on the skin, is prevented by applying rubber tires I4 to it, at its ends, or by otherwise treating or coating the outer surface of the shield to increase its traction. 1f tires are used for this purpose, a synthetic rubber not affected by the grease of the skin is desirable.

the channels which be apparent, the form shown in Figs. 4-5 bein easily produced in a1screw-machine. Another satisfactory method of making it is represented in Figs. l1 and l2, in which it is formed o! sheet metal but functions substantially the same as in the form first described. In this case the bladesupporting rib I5 is formed by folding the sheetmetal blank centrally. on itself and the shieldsupporting part by rolling the sides of the blank into cylindrical form. These parts are provided with cut teeth I6 corresponding generally to the circular ribs and grooves of the form first described, and also with terminal lugs I1 to interlock with'a corresponding formation provided in the frame arms I8 so as to be held non-rotary therein, but removable. As shown in Fig. l2 the core as thus made, occupies practically the whole of its interior diameter and with the blade forms a substantial continuous backing for it, for its full length and circumference, and on which it may slide or move freely as it is rolled on the skin. l 1

I claim:

1. A shaver comprising a fixed core of generally cylindrical contour, a razor blade mounted thereon within such contour and a reticulate shield rotatably and loosely supported throughout its full length and substantially its full circumference on said core and blade 4and normally free of pressure on the latter.

2. A shaver as in claim 1 inwh'ich the razor blade is flat and double-edged and both edges contribute tothe support of the shield.

3. A shaver as inclaim l in which the core is held in frame arms and provided with a longitudinal channel opening through lthe frame arms for discharge of cuttings.

4. A shaver as in claim 1 in Which-a doubleedged blade is mounted on a rib formed in the core with cutting channels on both sides thereof.

5. A shaver as in claim 1 in'which the blade is a flat steel ribbon attached to a holding member or saddle of softer metal by which it is The loose fit of the shield on the core, above l referred to and indicated in Fig. 9, is important because it allows the flexible shield to move slightly away from the blade, releasing its pressure thereon, when the device is lifted from the face. v

It is noted that the means of holding the blade edges on the core can obviously be varied from the design shown so long as they are so mounted as to have shearing contact with the rolling shield. The design shown has the advantage that the blade proper can be formed of a flat, steel ribbon and requires no special shaping beyond notching its ends to receive the saddle lugs I3. The saddle member is merely a folded channel of thin sheet metal easily produced and easily attached to the notched blade; itis not so thick that'its clenched lugs I3, turned up out of it, interfere with the action of the shield. These lugs in any event occur near the ends of the shield where it is imperforate.

The core also can be variously made, as will mounted upon and heldin position by the core.

6. A shaver as in claim 1 in which the blade is attached only at its extreme ends to the part on which it is supported.

'7. A shaver as in claim 1 in which the blade is double-edged, notched at its ends and attached to a saddle member by lugs on the latter clenched over the notches.

8. A shaver as in claim 1 including a supporting frame with apertured arms and in which the core is shouldered at its ends and held by such ends in apertures in the arms 'of the supporting frame, one of the ends and such apertures being non-circular to prevent rotation of the core in the frame.

9. A shaver as in claim 1 in which the core is ulate shield has its perforations arranged in a helical line around its circumference.

12. A dry shaver having a shaving head including a hollow rotary reticulate shield with an internal relatively fixed blade member, and provided with a hollowV handle, said handle being fiatV whereby such shield may be. conveniently rolled back and forth on the skin, the flatwise dimensions of such handle coinciding with the plane of the rotary axis ofsaid shield and one of such dimensions being extended in the direction of the rotary axis o! the shield to an extent adapting the handle to receive the head within it, and a supporting frame for holding said head, shaped to occupy the interior of the handle with said head eitherl within or without the same.

13. A dry shaver having a shaving head including' a hollow rotary reticulate shi'eld with an intion of the rotary axis to an extent adapting it to receive the head within it, and a, head-supporting frame shaped to occupy the interior of the casing. with said head either within or without the same. and a part of said frame being shaped to form the closure to such casing in one of its positions with a linger grip on such part for withdrawing the frame.

14. A dry shaver having a shaving head includ,- ing a rotary reticulate shield with an internal relatively xed blade and having a flat handle whereby such shield may be conveniently rolled backand forth on the skin, said handle being hollow with its atwise dimension extended in the direction of the rotary axis to an extent adapting it to receive the head within it, and a head-supporting frame shaped to be pushed into the chamber within the handle and held therein with the shaving head either within or without the same and a shoulder on the handle for lim-` iting the extent to which the frame may enter the same when the head is in shaving position.'

15. A dry shaver comprisingA a rotatably mounted reticulate shield having a handle whereby it may be rolled on the skin, a ribbon-type razor-blade held fixed within the shield in flatwiserelation to the inner face of such shield and means forming a backing for such blade extending for substantially the full length of the shield.

16. A dry shaver comprising a core, a reticulate shield rotatably mounted thereon and adapted to be rolled on the skin, and a thin, ribbon-type razor blade held on said core in a' relatively sta-- supporting such blade in said relation, relatively stationary with respect vto said means, said shield :being loosely supported with respect to said means whereby it may separate from the blade thereon when not pressed against it by the pressure of use.

19. A dry shaver including a rotatably mountved reticulate shield adapted to b e rolled on the skin, a double-edged ribbon-type razor blade mounted in iiatwise relation to the inner face of such shield with both its edges adapted for contact therewith, and means forming a support for such blade extending for substantiallythe fulll length of the rotary shield. Y

20. A dry shaver comprising a rotatably mounted reticulate-shield adapted to be rolled on the skin, a dat, double-edged, ribbon-type tionary position and in iiatwise'relation to the inner face of such shield and said core having a longitudinal rib supporting said razor-blade for substantially the full length of the rotary shield.

1'1. A dry shaver comprising a frame, a coreA thereon, a razor-blade-held relatively stationary thereon and thereby and a thin, flexible, reticulate vShieldrotatably mounted around and upon said core and blade and having aloose iit thereon whereby it is adapted to be moved bodily as well asto be flexed toward shaving contact with said blade -by the pressure of use, said shield being supported on said core substantially continuously from end to end thereof and having :itretched rubber 'bands upon it to promote tracrazor-blade flxedly mounted in iiatwise relation to the inner face of such shield with both its edges adapted for contact therewith and means for' supporting the blade in such position providing an open channel within the shield through which cuttings can be blown out of the shaver.

21. A dry shaver comprising a shaving head including an interior core, a thin and exible reticulate shield rotatably mounted thereon -to be rolled on the skin, and avrelatively stationary razor-blade on the core within such shield, said shield having a loose iit over the core and blade permitting it to rotate freely thereon and said core and blade together forming a relatively rigid backing for sustaining said vthin shield against collapse from external pressure.

22. A dry shaver comprisinga shaving head including `a reticulate shield rotatably mounted thereon adapted to be rolled o n the skin, and a ribbon-type razor-blade ilxed within such shield and notched at its ends for attachment to the part on which it is carried, and held by such part in shearing relation to the inner face of such shield.

23. A dry shaver comprising a core, a hollow reticulate shield mountedy to rotate about such core adapted to be rolled on the skin and a ribbon-typedouble-edged razor-blade attached to a blade.

{ 25. A dry shaver having a relatively xed interior blade and a reticulate `cylindrical shield mounted to be rotated on the skin with its inner race engaged in shearing relation vto the blade,

18. A dry shaver comprising a rotatably` mounted reticulate shield adapted to be rolled on the skin, a substantially flat ribbon-type razor blade arranged in atwise relation with respect the openings in said shieldbeing arranged in a single, spiral line around the shield.

f. RALPH G. Aanv.`

to the inner face of such shield, and means i'or

Images