US2060687A - Razor - Google Patents

Description

NOV. 10, w T PARKIN I RAZOR Filed June 4, 1935 Irzqenior Patented Nov. 10, 1936 UNITED STATES PATENT OFFICE RAZOR Application June 4, 1935, Serial No. 24,865

9 Claims. (Cl. 30-46) This invention relates to an improved safety razor of the general type wherein the blade may be reciprocated in a path parallel to its cutting edge as the razor is moved over the flesh of the user. Thus a razor of the present type in some respects resembles the form of razor disclosed in King Patent No. 1,890,733. This invention, however, eliminates the previously employed saddle which reciprocated on the retainer.

To permit this desirable result, an elongate operating bar is arranged so that it oscillates in the handle of the razor with its upper end engaging the cam portion of a driving roller. The operating bar may have substantial diameter and be provided with a substantially circular portion to engage an opening substantially in the center of the blade, thus to impart a reciprocating movement to the blade itself. The lower end of the operating bar preferably is disposed adjoining the end of the razor handle so that a very small angle of oscillation is imposed upon the bar by the cam; therefore very little wear results due to the rubbing movement of the bar on the edge of the opening in the razor blade. Furthermore, this arrangement permits the provision of a freely rotatable round operating bar so that in practical use the angular position of the bar relative to its path of oscillation, i. e., relative to the path of reciprocation of the razor blade, may change from time to time so that all portions of the part of the bar which engage the blade are more or less uniformly subjected to wear.

Another important feature of this arrangement is the provision of simple means supporting the lower end of the bar for limited pivotal movement so that the bar may readily be removed from the razor for repair or replacement, if desired. Furthermore, this arrangement permits the convenient assembly of the razor when the same is manufactured.

In the accompanying drawing:

Fig. 1 is a central vertical section on an enlarged scale of a razor in which this invention is embodied, the driving roller and operating bar, however, being shown in elevation;

Fig. 2 is a section indicated by line 2-2 of Fig. 1;

Fig. 3 is a plan view of the support with a part of the retainer shown as swung to its open position;

Figs. 4 and 5 are sections on lines 4--4 and 5-5 respectively of Fig. 1;

Fig. 6 is a bottom view of the handle; and

Fig. 7 is an enlarged plan view of a blade which, may be emp y d in a razor 9? th s typ In the accompanying drawing, which may be regarded as illustrative of the present invention, the numeral I designates a generally tubular handle which may be connected to a support 2 having rows of elongate slots 3 separating its intermediate portion from rail-like guard portions 4. The intermediate part of the support 2 may be provided with means such as pairs of guide lugs 5 and 6 which are arranged to define and limit the path of movement of the blade and may also have small protuberances 1 upon which the blade may rest and slide.

The retainer I is pivotally connected to the support 2 by a hinge II and is provided with a resilient clip l2 which normally holds the retainer in its normal position above the support, as shown in Figs. 1 and 2. When the clip 2 is pressed outwardly and upwardly, the retainer may be swung away from the support to the position indicated in Fig. 3 to permit the removal or replacement of the blade. The retainer I0 is provided with upstanding ears l having openings in which extensions of the driving roller I! are journaled, the ends of this roller having roughened surfaces Hi to engage the flesh of the user of the razor. The intermediate part of the roller I! is provided with a cam groove 9.

' A razor of this type may be provided with a blade 40, such as is shown more particularly in Fig. 7, this blade having a central circular opening 4| to receive the operating bar. The blade may also have a pair of similar openings 42, these openings being disposed at opposite sides of the opening 4| and having generally rectangular inner portions 43 to receive the lugs 5 and extensions 44 to receive the lugs B, the sides of these portions 43 and 44 of the openings 42 being parallel to the cutting edges of the blade so that they may cooperate respectively with the corresponding ends of the lugs 5 and B in defining the straight-line path of the blade.

In accordance with this invention, the major portion of tubular handle I may conveniently have an outer generally hexagonal form, as shown, for example, in Fig. 5. The upper portion of the handle has a cylindrical bore 20; the lower end thereof, however, has a recess 2| therein of generally hexagonal shape in cross section, as shown in Figs. 4 and 6. Thus where the recess 2| communicates with the bore 20, a shoulder 23 is provided. A hexagonal plug 21 is shaped to have a tight frictional engagement with the recess 2| at the lower end of the handle. This plug may be provided with a central bore 28 which communicates with a generally conical recess 29 having its larger end at the upper part of the plug adjoining the shoulder 23.

A sheet metal spider 30 is normally disposed between the upper end of the plug 21 and the shoulder 23, this spider being provided with radial arms that have angular extremities received in the corners at the junctures of the planar walls of the hexagonal recess 2| and having a body portion with a central circular opening therein.

The operating bar 32 has a ball-like lower end 33 from which a cylindrical element 34 of relatively small diameter extends upwardly through the opening in the spider 36. A tube 35 forms the body portion of the bar 32 and receives the end of member 34 in interfitting engagement therewith, the lower end of the tube 35 being spaced slightly from the spherical element 33 so that an annular groove is provided in which the intermediate part of the spider fits to permit slight oscillatory movement of the bar relative to the spider, the inner wall of this groove being provided by element 34.

The bar 32 is provided with a head 31 having a cylindrical extension 38 in tight interfitting engagement with the upper end of tube 35. The cylindrical head 31 normally extends through the opening 4| in the razor blade, engaging the edge of this opening to impart movement to the blade. Above the blade the head has a conical portion extending to a cylindrical extremity 39 (Fig. 2) which is received in the cam groove I9 of the driving roller. Preferably the upper portion of this follower element 39 is somewhat rounded off to facilitate initial engagement of the element and groove when the retainer is swung to its normal operative position.

When a razor of this type is to be used, a blade such as the blade 40 is disposed on the support with the head 3! extending through the opening 4|. The retainer is then swung to its normal position until the clip l2 snaps into place. During this movement the follower element 39 is brought into engagement with the cam groove H3. The razor is then ready for use.

The movement of the razor over the flesh of the user results in the rotation of driving roller ll, which causes the follower element 39 to reciprocate, the element being held against transverse movement relative to the cutting edges of the blade by the blade itself, which is retained against such a movement by the lugs 5 and 6. As the blade moves from one end to the other of its path, the head 31 has a slight oscillatory movement about a center substantially defined by the loose connection between the spider 30 and the lower end of the operating bar. It is evident that the angular movement of the bar is very slight so that the wear imposed upon the head 38 by the edge of the opening 4| of the blade is relatively small. Obviously at the lower end of the bar where it is connected with the spider 30 a very minute movement occurs and the tendency to wear is very slight. Since all portions of the bar are circular and freely rotatably, it may be rotated from time to time as blades are removed from the support or disposed thereon so that different portions of the bar and particularly of the head 3'! are disposed in positions to receive the wear resulting from the swinging of the bar in a single plane. It is thus evident that while the bar is round and is supported so that it may oscillate in any direction, it is restrained to oscillate in one plane by the guiding means for the blade itself. It is apparent that the concial recess 29 merely provides a loose casing out of contact with the ball element 33 during the normal operation of the razor.

When it is desired to remove the bar from the handle, the retainer I0 may be swung to its inoperative position and the top of the bar pressed downwardly so that it is effective through the spider 30 in pushing plug 21 out of recess 2|, whereupon the bar and spider will drop out of the handle. When it is desired to reassemble these parts, the head 3'! of the bar is inserted in the bore 20 of the handle and the bar is pushed upwardly until the arms of the spider engage the shoulder 23. The plug 2'! is then inserted in the recess 2| to retain the spider in place.

It is evident that the present invention affords a simple, durable and readily assembled or disassembled mechanism to permit a driving roller to cause the reciprocation of a razor blade.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a driving roller rotatably mounted on the retainer, said roller having a cam portion,

an oscillatory operating bar having a lower end I received in the lower end of the handle and having an element at its upper end engaging the cam portion of the roller and providing a follower therefor, said bar having a substantially cylindrical portion to engage an opening in a blade, and means upon the support to engage the blade and restrain the same so that it follows a linear path in response to oscillation of the follower element by the cam portion of the roller.

2. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a driving roller rotatably mounted on the retainer, said roller having a cam por-- tion, an oscillatory operating bar having a lower end received in the lower end of the handle and having an element at its upper end engaging the cam portion of the roller and providing a follower therefor, said bar having a cylindrical portion to engage an opening in a blade, means upon the support to engage the blade and restrain the same so that it follows a linear path in response to oscillation of the follower element by the cam portion of the roller, a sheet metal element in the lower part of the handle, said element having a central opening therein, and an annular groove in the bar loosely engaging the sheet metal element in the region of said opening so that the bar may have an oscillatory movement relative thereto.

3. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a driving roller rotatably mounted on the retainer, said roller having a cam portion, an oscillatory operating bar having a lower end received in the lower end of the handle and having an element at its upper end engaging the cam portion of the roller and providing a follower therefor, said bar having a cylindrical portion to engage an opening in a blade, means upon the support to engage the blade and restrain the same so that it follows a linear path in response to oscillation of the follower element by the cam portion of the roller, a sheet metal element in the lower part of the handle, said element having a central opening therein, an annular groove in the bar loosely engaging the sheet metal element in the region of said opening so that the bar may have an oscillatory movement relative thereto, and a plug received in the lower end of the handle and holding the sheet metal member against a shoulder inside of the handle.

4. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a driving roller rotatably mounted on the retainer, said roller having a cam portion, an oscillatory operating bar having a length substantially equal to the length of the handle and having its lower end received in the lower end of the handle, said bar having an element at its upper end engaging the cam portion of the roller and providing a follower therefor, said bar also having a portion to engage an opening in a blade, means upon the support to engage the blade and restrain the same so that it follows a linear path in response to oscillation of the follower element by the cam portion of the roller.

5. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a blade normally held between the retainer and support, a driving roller rotatably mounted on the retainer, said roller having a cam portion, an operating bar having a length substantially equal to the length of the handle and having its lower end received in the handle, said bar having a follower element at its upper end engaging the cam portion of the roller, said blade having openings engaging lugs on the support so that the blade is restrained to move in a linear path, said blade also having a central round opening, said bar having a round portion extending through and engaging said opening so that the bar imparts a linear movement to the blade in response to oscillation of the follower element by the cam portion of the roller.

6. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a blade normally held between the retainer and support, a driving roller rotatabl mounted on the retainer, said roller having a cam portion, an operating bar having a lower end received in the handle and having a round follower element at its upper end engaging the cam portion of the roller, said blade having openings engaging lugs on the support so that the blade is restrained to move in a linear path, said blade also having a central round opening, said bar having a round portion extending through and engaging said opening so that the bar imparts a linear movement to the blade in response to oscillation of the follower element by the cam portion of the roller, means supporting the lower end of the bar in the handle, said means being arranged so that the bar is freely rotatable about its own longitudinal axis so that different parts of the round portion of the bar engaging the blade may be subjected to wear when imparting a reciprocatory movement to the blade.

'7. A razor of the class described comprising a hollow handle, a blade support secured to the upper end of the handle, a retainer movably connected to the support, a blade normally held between the retainer and support, the blade and support having interfitting portions restraining the blade so that it may move in a straight line path, a driving roller rotatably mounted on the retainer, said roller having a cam portion, an operating bar having a lower end positioned in the lower end of the handle, and means supporting the lower end of said bar in the handle so that the bar may have a slight oscillatory movement within the handle, an element at the upper end of the bar providing a follower engaging the cam portion of the roller, a portion of the bar engaging an opening in the blade so that movement of the follower element by the roller is effective in causing the movement of the blade and the oscillation of the bar in a central plane, the bar having a length of the order of the length of the handle so that the angle of oscillatory movement is small and so that very slight movement occurs between the blade and the portion of the bar engaging the same.

8. A razor of the class described comprising a blade holder, a driving roller rotatably mounted on the holder and providing a cam portion, a blade supported by the holder and restrained thereby to move in a straight line path, a hollow handle connected to the holder, an operating bar having a length substantially as great as that of the handle and having a portion engaging an opening in the blade, said bar having an end movably mounted in the lower part of the handle and also having a follower element engaging the cam portion of the driving roller.

9. A razor of the class described comprising a hollow handle, a support secured to one end of the handle, a retainer movably connected to the support, a blade between the retainer and support, parts of the support and blade being in sliding interfitting engagement so that the blade is restrained to follow a straight line path, a driving roller rotatably mounted on the retainer, said roller having a cam portion, an oscillatory operating bar having a lower end received in the lower end of the handle and having an element at its upper end engaging the cam portion of the roller and providing a follower therefor, said bar having a round portion engaging a round opening in a blade, and means in the handle to support the bar and permit its oscillation and permit its rotation about its own axis.

WINFRED T. PARKIN.

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