US2021344A - Safety razor - Google Patents

Description

Nov. 19, 1935. wi sgN 2,021,344

SAFETY RAZOR Filed March 11, 1953 buuuuuuuuumu/n fi a zI/lornrya Patented Nov. 19, 1935 UNITED STATES PATENT OFFICE SAFETY RAZOR Emmett Wilson, Los Angeles, Calif. Application March 11, 1933, Serial No. 660,334 10 Claims. (01. 30-44) My invention relates to safety razors and has die, a blade, a guard and a shaft to produce the particular reference to safety razors of the type razor in accordance with my invention.

employing a blade which is reciprocated to pro- Other objects and advantages will be apparent duce a cutting motion of the blade upon the from a study of the following specifications, read beard. in connection with the accompanying drawing, 5

One of the objects of my invention is to prowherein vide a safety razor having a novel and simple Figure 1 is a rear, elevational view of a razor means for vibrating the razor or vibrating the constructed in accordance with my invention; blade therein in the direction of its cutting edge Figure 2 is a vertical, sectional view, taken thereby facilitating a shaving, reducing the force along line II--II of Fig. 1; and 10 or pull upon the skin and hair or whiskers and Figure 3 is a detail, sectional view taken along increasing the life of the cutting edge of the line IIIIII of Fig. 2. blade. Referring to the drawing, I have illustrated my Another object of the invention is to provide razor as comprising a handle l which is prefera safety razor in which the blade is vibrated or ably of tubu r Construction, having a central 15 reciprocated by means set in motion manually bore 2 extending longitudinally thereof, the hanwhich means is accessible at all times and which dle being formed with a guard-plate 3 upon the does not interfere with the normal use of the upper end thereof, which may be formed interazor. grally with the handle I or may be formed as Another object of the invention is to provide a a separate piece and attached thereto as desired. 20 means of this class whereby extreme 'high rates A suitable guard 4 is preferably pivoted, as of vibration or reciprocation of the blade may indicated at 5, at one side of the guard-plate 3, be obtained. the" opposite end 6 of the guard being arranged Another object of the invention is to provide to engage and be detachably secured to the opa means of this class whereby the relatively high posite end of the guard-plate 3. 25 rate of Vibration or reciprocation of the blade may By referring particularly to Figure 2, it will be be maintained over a continued period of time observed that the guard-plate 3 is provided with required for one shave. a recess 1 extending longitudinally of the plate Another object of the invention is to provide to form the upper surface of the guard-plate with a razor of this class from which the blade may a pair of bearing surfaces 8 and 9 near the upper 30 be removed and another substituted as quickly and lower edges of the plate, the bearing surfaces and easily as in the safety razors now in use. constituting a bearing support for a blade l0 per- Another object of the invention is to provide mitting the blade to be reciprocated longitudia razor of this class in which the several operatnally of the plate 3; that is, along the line at right ing parts are so arranged as not to interfere with angles to the axis of the handle I. The lower 35 the ready gripping of the razor and the maniside edge of the guard-plate 3 is preferably propulation thereof during the shaving operation. vided with a series of recesses formed therein, as

Another object of the invention is to provide indicated at II, to constitute a serrated guard.

a razor of this class which is economical of con- By referring part culafly to Figure 3, it wi l be struction, durable, and which will not readily ob ervedthat the guard-plate 3 is provided with 0 deteriorate or get out of m a pair of upstanding posts I2 and I3 near the Another object is the provision of a razor havends of the plate to engage Suitable elongated ing a bladereciprocably mounted upon the head gi 2 g? 3 19 3? 2 3 i g g igig i d w 1c s o s i 1 e i and arranged to be Teclprocated by means of assist in supporting the blade and holding the 45 i iz f? i z haniue of h Same in place while it is reciprocated.

a i a P0 0 W 011 away 0 expose The hollow handle is illustrated as constituting the shaft or stem so that it may be engaged by the housing for a Spindle or haft l5 extending a suitable device for imparting rotary movement through the longitudinal bore 2, th upper d thereto- I of the bore being reduced as at I6 to receive a 50 Another oblect 0f the lnvention is t0 provide bushing bearing l1 therein constituting the beara safety razor of the type describ d in the preceding for the upper end It! of the spindle or shaft p l p in which the number of parts l5. The lower end of the spindle or shaft I5 is employed in constructing the razor is reduced to illustrated as being formed with a pin bearing the minimum, there being required only a hanl9 engageable in a suitable pin bearing seat 20 55 formed upon or secured to a closure plate 2| constituting the closure plate for the lower end of the handle I.

It will be observed that the lower end of the handle I is flared outwardly, as indicated at 22, to form a chamber 23 surrounding a flywheel 24 rigidly secured to the spindle I5. The flywheel is preferably formed of any suitable material having suitable mass and is preferably formed with the greater portion of the mass thereof arranged near the periphery of the flywheel so that the moment of inertia of the flywheel is relatively great as compared to the actual mass of the total flywheel.

Intermediate the upper and lower ends of the shaft I5, I provide a knurled surface 25 thereon, the knurled surface being preferably of larger diameter than the diameter of the shaft, although this is not essential, the important feature being that the knurled surface should be of sufficient dimensions to be readily engaged by any friction device so that rotary motion may be imparted to the shaft, I5.

It will be observed from an inspection of Figures 1 and 2 that the handle I, adjacent the knurled portion of the shaft I5 is cut away, as indicated at 25, to form a recess through which the knurled surface is exposed and the recess 26 is preferably of. such extent as to expose a considerable area of the knurled surface 25 to engagement by an instrument which may be inserted through the recess. For example, I prefer that the arrangement be such that a cord, rope, strip of rubber, or other suitable friction material, may be held taut in the manner of the usual razor strop and that the exposed knurled section of the shaft may be placed into engagement with said taut cord or strop so that drawing the razor over the cord or strop with the shaft at substantially right angles to the direction of movement of the razor over the strop, will cause the shaft to berotated.

By rapidly drawing the razor over such strop or cord a number of times with the strop engaging the knurled portion of the shaft. through the recess 26, a rapid rotary movement may be impartedto the shaft, which movement, I have found in practice, to be sufiicient to cause the inertia of theifiywheel to keep the shaft rotating for a relatively long period of time, from 5 to minutes.

The upper end of the shaft I5 is provided with any suitable means for connecting the same with the razor blade If] so that rotary motion of the shaft I5 will impart a reciprocating motion to the blade. I prefer that this connection be made merely by forming an eccentric end 21 upon the upper end of the shaft I 5 so that the eccentric 21 engages an elongated slot 28 near the center of the blade. Thus rotation of the shaft about its axis will cause the eccentric 21 to move the blade to the right and to the left, as viewed in Figure 3. Thus the rotary motion of the blade, which continues as hereinbefore stated for a period of from 5 to 10 minutes, will impart a reciprocating motion of like duration to the blade and it is found in practice that such motion, enduring for this length of time, usually is sufficient for one complete shave, though in the event that the duration. of the movement is not suflicient, additional movement may be imparted to the blade merely by drawing the razor again over the cord or strop employed to rotate the shaft.

It will be observed that the pin bearing I9, at the lower end of the shaft, constitutes a bearing of relatively low friction, while the upper end of the shaft is supported in the bearing bushing I1 which may be, and preferably is, provided with beveled upper and lower surfaces, as indicated at 29, so that a relatively small area of contact is provided between this bushing and the bearing portion of the shaft. Thus relatively slight friction occurs 5 between the upper end of the shaft and its bearme.

While I have shown and described the preferred embodiment of my invention, it is to be understood that I do not wish to be limited to any of 10 the details of construction shown herein, except as defined in the appended claims.

I claim:

1. In a razor construction, a handle having a tubular bore extending longitudinally therethrough, a head formed upon one end of said handle, a blade reciprocably mounted upon said head for movement in a direction at right angles to the axis of said bore, means for reciprocating said blade including a shaft extending through said bore and connected to said blade, a recess in said handle extending partially around said bore and communicating with said bore to expose a portion of said shaft, friction means on said shaft at said exposed portion for engagement by a friction device to apply rotary movement to said shaft, and a flywheel on said shaft.

2. In a safety razor, a handle having a bore extending longitudinally thereof, a recess through the side of said handle communicating with the interior bore thereof, a head formed upon one end of said handle, a blade reciprocably mounted upon said head for movement in a direction at right angles to the axis of said bore, a shaft extending coaxially through said bore, means coupling said shaft to said blade for reciprocating said blade by rotation of said shaft, friction means on said shaft aligned with said recess whereby said friction means may be engaged by a friction device exteriorly of said handle to impart rotary movement to said shaft and a flywheel on said shaft.

3. In a safety razor, a handle having a bore extending longitudinally thereof, a recess through the side of said handle communicating with the interior bore thereof, a head formed upon one end of said handle, a blade reciprocably mounted upon said head for movement in a direction at right angles to the axis of said bore, a shaft extending coaxially through said bore, means coupling said shaft to said blade for reciprocating said blade by rotation of said shaft, a portion of said shaft being exposed through said recess for engagement with a friction strop to impart rotary movement to said shaft, means on said shaft at said exposed portion for frictionally engaging said friction means and a flywheel on said shaft. 4. In a safety razor, a handle member having a tubular bore extending longitudinally therethrough, a razor blade supporting head formed upon one end of said handle member, a blade reciprocally mounted upon said head for movement in a direction at right angles to the axis of said bore, means for reciprocating said blade including a shaft extending through said bore and connected to said blade, a recess in said handle member extending partially around said bore and communicating with said bore to expose a portion of said shaft for engagement by a friction device to apply rotary motion to said shaft, an enlargement of said handle member at the end thereof opposite said head, and a fly wheel on said shaft housed within said enlargement of said handle member.

5. In a safety razor, a head, a blade reciprocally mounted upon said head, a hollow handle member extending from said head, a shaft having a fly wheel thereon rotatably mounted within said hollow handle member and extending through said head in engagement with said blade, means coupling said blade to said shaft for reciprocating said blade by rotation of said shaft, a recess in said hollow handle member extending partially around said shaft to expose a portion of said shaft for engagement by a friction device for imparting rotary movement to said shaft.

6. In a safety razor, a frame comprising, a head and a hollow handle member extending from one side of the head, a blade reciprocally mounted on said head, a shaft rotatably mounted in the handle member, means eccentrically connecting said shaft with the blade for reciprocating the latter with the rotation of the shaft, a fly wheel mounted on the shaft, said shaft having a portion exposed through said handle member for engagement by a friction device for imparting rotary movement to said shaft.

7. In a safety razor, a frame comprising, a hollow handle having a head positioned transversely at one end thereof and provided at its opposite end with an enlarged casing portion, a

, shaft rotatably mounted within the hollow handle, a blade reciprocally mounted on the head, eccentric means connecting the shaft with the blade, a fly wheel mounted on the shaft and positioned within the casing portion, there being provided at the outer side of the fly wheel and coaxial with the shaft a bearing portion, and a cap secured to the outer side of the casing portion and provided with means cooperating with the bearing portion for centering the extended end of the shaft.

8. In a safety razor, a head, a blade reciprocally mounted on said head, a hollow handle member extending from said head, a shaft having a fly wheel thereon and the whole rotatably mounted within said hollow handle, means cou- 5 pling said blade tosaid shaft for reciprocating said blade by rotation of said shaft, and means in connection with said shaft to facilitate the manual rotation of said shaft.

9. In a safety razor, a head, a blade reciprocally mounted on said head, a handle extending from said head and having a longitudinal bore extending therethrough communicating with said head, a shaft rotatably mounted in said bore and extending into said head, means on the end of said shaft projecting into said head for eccentrically engaging said blade to impart reciprocal motion to said blade upon rotation. of said shaft,

a fly wheel on said shaft at a point remote from said blade engaging end thereof and positioned in said handle, and means in connection with said shaft to facilitate the manual rotation of said shaft.

10. In a safety razor, ahead, a blade reciprocally mounted on said head, a hollow handle extending from said head, a shaft having a fly Wheel thereon and the whole rotatably mounted within said hollow handle, means coupling said blade to said shaft for reciprocating said blade by rotation of said shaft, and means in conneotion with said shaft for engagement with manual rotating means through an opening in the side of said handle and operable by the application of force in a direction at right angles to the axis of said shaft.

EMMETT WILSON.

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