US2174039A

US2174039A - Shaving implement

Info

Publication number: US2174039A
Application number: US197893A
Authority: US
Inventors: Muros Joseph
Original assignee: Gillette Safety Razor Co
Current assignee: Gillette Co LLC
Priority date: 1938-03-24
Filing date: 1938-03-24
Publication date: 1939-09-26
Anticipated expiration: 1956-09-26

Description

Sept. 26, 1939. J MUROS 2,174,039

SHAVING IMPLEMENT Filed March 24, 1938 ATTORN EY Patented Sept. 26, 1939 UNITED STATES PATENT OFFICE 2,174,039 SHAVING IMBLEMENT Application March 24,

Claims.

This invention relates to shaving implements of the type employing relatively movable shearing members and being designed for shaving without the use of lather. The invention consists in an 5 improved construction for the stationary shearing member in those implements which include in their structure a thin resilient metal sheet which is perforated to present the stationary shearing edges.

In an endeavor to reduce the thickness of the stationary shearing member and so improve the efficiency and close-shaving characteristics of the implement, the attempt has been made to utilize a thin, perforated steel sheet which is not of itself sufficiently rigid to be self-sustaining but must be secured to a supporting frame in order that it may be given the curvature desired in the implement. This steel sheet is of necessity somewhat resilient since it must be tempered to give it the required edge-holding properties. The attempt has been made heretofore to secure such a steel sheet to its supporting frame by soldering or braizing but this manner of attachment has not proved to be satisfactory or reliable in continued use of the implement, since for one reason or another, the connecting medium deteriorates under the constant tendency of the steel sheet to straighten. The result is that after variable periods of use the steel sheet becomes detached and if the user overlooks this condition he is likely seriously to damage himelf by coming in contact with the oscillatory cutter which is ordinarily completely guarded by the perforated steel sheet.

dinal members connected by curved or arched' ribs, and a thin resilient shearing plate conformed to the curvature of the arched ribs, together with means for positively clamping the edges of the plate to, or adjacent to, the longitudinal members of the frame.

While this is the broad conception of my inven- For example, the inner face of the frame may be provided with projecting shoulders and the resilient plate may be conformed to the ribs and sprung at its edges into engagement with the shoulders, thereby becoming resiliently inter An object of the present invention is to remedy' tion it may be put into practice in various ways.

1938, Serial No. 197,893

locked with the frame without the intervention of any connecting medium such as solder. Under such conditions, the resilient plate will maintain its position indefinitely since its tendency to straighten out has the effect only of in tensifying the interlocking engagement between the plate and the frame. 'As an alternative construction, the longitudinal members of the frame may be slitted and the marginal edges of the resilient plate maybe fitted into these slits and maintained therein by a swaging displacement of the metal of the frame, or as another alternative, a separate anchor or clip may be provided for interlocking mechanically with the frame and with the marginal edges of the sheet steel shearing member. As already intimated the exact mechanical construction employed is of secondary importance so long as an interlocking configuration i s employed by which, the edges of the steel sheet and the frame are mechanically connected while the body of the steel sheet conforms to the curvature of the frame.

These and other features of the invention will be best understood and appreciated from the fol-' lowing description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawing, in which;-

Fig. 1 is a fragmentary sectional view on an enlarged scale of a dry shaving implement embodying my invention :in one satisfactory embodiment;

Fig. 2 is a view in perspective, on a scale reduced as compared to that of Fig. 1 but still enlarged in respect to the actual implement, showing the complete stationary shear member;

Fig. 3 is a'fragmentary view in central crosssection of the member shown in Fig. 2 buton a greatly enlarged scale;

Fig. 4 is asectional view on the scale of Fig. 1' illustrating in cross-section a stationary shear member of modified construction;

Figs. 5 and 6 are views in plan and" elevation respectively of the member shown in Fig. 4 but on a somewhat reduced scale;

Fig. 7 is a view in cross-section illustrating a third construction of stationary member embodying my invention;

Fig. 8 is a view in perspective of one of the clip members used with the frame of Fig. '7; and

Fig. 9 is a fragmentary view in section showing a portion of Fig. 7 on a greatly enlarged scale.

The implement as shown in Fig. 1 comprises a casing ll] of Bakelite or any suitable mouldable material which serves as a handle for the implement and also as a housing for its driving motor. The casing I0 is rectangular in crosssection and provided at its upper end with a skel-' eton supporting frame having semi-circular end ribs connecting spaced elongated side members |2. An intermediate curved rib is also shown as located midway between the ends of the frame and conforming in the curvature of its upper face to the curvatureof the end ribs Shaped to the ribs of the supporting frame and conforming to the transverse exterior curvature thereof is a thin, resilient perforated steel sheet l3. The sheet is provided with a multiplicity of perforations M, the edges'of which form the stationary shearing edges of the implement and, as already seen, the perforated sheet is sufficiently hardened and tempered to insure that it has good edge-holding properties. By its temper it is rendered sulficiently resilient so that it tendsnormally to assume a flat condition and, therefore, it has to be permanently confinedin order to maintain the desired transversely curved condition. In addition to the shearing perforations the sheet |3 has a row of larger perforations along each of its longitudinal edges.

As herein shown the sheet steel I 3 is secured to the supporting frame by having its longitudinal the marginal edges of the steel sheet are mechanically interlocked to its supporting frame and are permanently retained in position without reliance upon a connecting medium of any kind.

The assembled frame and sheet l3 form a rigid self-sustaining unit which may be handled conveniently' and attached to or detached from the casing |3 of the implement. To this end the op posite side members of the supporting frame are provided with notches H for the reception of movable clamping arms |8 carried by the casing l0.

A portion of the motor 20 of the implement is shown in Fig. 1 as is also the movable shearing member of the implement which comprises a fiat blade 25 shaped at its edge to clear the inter mediaterib of the supporting arm. The blade 25 is loosely held in a bar 23 which is provided at opposite ends with trunnions 24 and journaled in transverse arms 26 which form part of. the casing. The bar 23 is provided with a pair of downwardly extending longitudinal plates 22 spaced to receive between them a cylindrical eccentric member 2| projecting from the end of the rotor of the motor. When the motor is energized the carrier bar 23 is rocked back and forth and the blade 25 is swept transversely across the arcuate portion of the stationary shearing member l3. ,It will be understood that the implement is moved across the face of the user and that those hairs which enter the aperture M are sheared by the cooperating shearing action of the movable blade 25 with the stationary shearing member 3.

In the embodiment of the invention shown in Figs. i, 5 and 6, the supporting frame is of skeleton construction and comprises elongated side inner surface of the ribs 3| and 32 instead of their outer surface as in the embodiment of the invention already described. To this end, the inner arcuate surfaces of the three ribs are brought into a single cylindrical surface and each of the longitudinal members 30 is provided with an inwardly projecting rib 33 forming a reentrant longitudinal shoulder extending for the full length of the frame at opposite sides thereof.

The shearing member comprises a thin flexible sheet 34 rectangular in shape and provided with a multiplicity of small perforations arranged in rows in two substantially rectangular panels and having also a row of larger perforations spaced within its longitudinal marginal edges. The sheet 34 is of such width that it may be forced into conformity with the inner curved faces of the ribs 3| and 32 and snapped into place about the ribs 33 so that it is maintained by its resiliency within the supporting frame and forms therewith a selfsustaining unit. If desired, the longitudinal edges of the sheet 34 may be notched to, receive a tongue or projection upon one or both of the ribs 33 thereby locking the sheet against longitudinal displacement. In this construction there is no tendency for the sheet to disengage itself from the supporting frame since its resilient tendency to straighten causes it to engage the inner cylindrical surface of the frame. It may, however, be disengaged from the frame by having one of its edges sprung over the rib 33 andthus replacement is facilitated when the shearing edges of the perforations have become dulled by use. The thickness of the intermediate rib 32 is reduced so that it constitutes no substantial obstruction when the implement is moved across the face of the user. F

In the embodiment of the implement shown in Figs. 7, 8 and 9 the supporting frame comprises longitudinal side members 40 connected by semicircular transverse ribs 4|. 0f the ribs 4| lie in a single cylindrical surface and impart their shape to the flexible shearing member when the latter is conformed to them. This member comprises a thin flexible .sheet 42, substantially rectangularsin shape and perforated in accordance with the pattern similar to that shown in Fig. 5. It is conformed to the supporting frame with its longitudinal marginal edges registering with the members 40 of the frame. It is mechanically interlocked with these members by means of elongated clips 43 formed of flexible sheet metal and shaped to embrace the frame;

members 40. One edge of the clip is provided with intumed teeth 44 and when the clip has been positioned upon the members 40 of the frame with the flexible sheet 42 overlying the members 40 the walls of the clip 43 are bent so that the teeth 44 extend inwardly through the marginal apertures of the plate. In Fig. 7 the clip at the right-hand side of the supporting frame is shown as positioned but not closed into interlocking engagement While the clip at the left side of the frame is shown as bent into its clamping position with the teeth 44 engaging the upper surface of the frame member 40. Preferably and as herein shown the inner wall of the clip is permanently secured, as by welding, to the frame and in completing the device it is only necessary to position the sheet 42 and bend inwardly the outer wall of the clip. The thin sheet 42 is thus securely held in shaving position but it may be detached" forreplacement by springing the outer wall of the clip sufliciently to disengage the marginal perforations of the clip. It will be understood that the unit The outer surfaces shown in Figs, 4-6 and the unit shown in Figs. 7-9 are intended for use in an implement of the character illustrated in Fig. 1.

Having thus disclosed my invention and described a preferred embodiment thereof for purposes of illustration but not by way of limitation, I claim as new and desire to secure by Letters Patent:

1. A shaving implement comprising a supporting frame having longitudinal members connected by curved ribs, a thin resilient shearing plate conformed to the curvature of said ribs and extending at its edges into proximity to the longitudinal members of the frame, means for positively clamping the plate to said longitudinal members, and a cooperating movable shearing member.

2. A shaving implement comprising a supporting frame having longitudinal members connected by arched ribs, a thin resilient shearing plate of rectangular shape conformed to the curvature of said ribs and interlocked at its edges with the longitudinal members of the frame, and a cooperating movable shearing member.

3. A shaving implement comprising a supporting frame having longitudinal members connected by arched ribs and having parallel longitudinal shoulders in opposite sides of its internal surface, a thin resilient shearing plate yieldingly conformed to the curvature of said ribs and held in place thereagainst by engagement at its edges with said longitudinal shoulders, and a cooperating movable shearing member.

4. A shaving implement comprising a support+ ing frame having longitudinal side members connected by curved ribs and provided with a shoulder in the inner face of each side member, a thin resilient apertured plate yieldingly conformed to the inner face of said ribs and sprung at its edges into the shoulders of the side members, and means for holding said plate against longitudinal shifting with respect to the frame and a cooperating movable cutter.

5. A shaving implement comprising a skeleton supporting frame having an inner transversely curved surface and inwardly projecting shoulders at its opposite sides, and a thin resilient shearing plate interlocked with said shoulders and pressed by its own resiliency into conformity to the curved surface of said frame.

JOSEPH MUROS.