US2160987A - Mechanical razor - Google Patents

Description

June 6, 1939. l

Filed Nov. l, 1958 J. H. RAND, JR., ET AL MECHANICAL RAZOR INVENTO RS J.H.RAND, JR. A.M. Ross .A TORNEY' Patented June 6, 1939 UNITED STATES i PATENT OFFICE Greenwich, Conn.,

asslgnors to Remington Rand Inc., Buffalo, N. Y., a corporation of Dela- Ware Application November l, 1938, Serial No. 238,126

4 Claims. l(Cl. 30-43) This application relates to mechanical razors and more particularly to the operation and construction of a shearing head therefor.

In mechanical razors of the usual type it has been the general practice to provide a shearing head in which the outer cutter, or shear plate, is held stationary with respect to the handle, while the inner cutter is oscillated with respect to the outer cutter by some form of driving arm.

I While this type of head has been found satisfactory in use, there is one disadvantage, namely, that the'blades or bars of the outer cutter bend or cover a considerable portion of the hairs in the skin traversed. This necessitates the movement of the razor over the skin a number of times to insure that all of the hairs will be cut.

provide a movable outer cutter, which will have a combing or sifting action, thereby insuring that a major portion of the hair in the skin traversed l by the razor will be picked up and cut.

It is, therefore, the principal object of the in- 25 vention to provide a shearing head in which the outer cutter is moved a short distance relative to the handle, whereby the blades sift and comb the hair into position to be cut. l

Anotherobject is to provide an outer cutter -30 which is adapted to be given a slight longitudinal movement relative to the handle and in the same direction as the inner cutter.

A still further object is. to provide a resilient cushion, between the driving means and outer 35 cutter for reducing noise and insuring positive movement of the cutter.

A more clear conception of the construction,

operation, and further objects of the invention may be had from the following specification when 40 read in conjunction with the accompanying drawing, in which:

Fig. V1 is a side elevation of a shearing head with a portion broken away to disclose the invention;

Fig. 2 is a cross sectional view taken substan- 45 tially along the line 2-2 of Fig. 1;

Fig. 3 is a longitudinal section through the To overcome this disadvantage it is proposed to any well known plastic material such as bakelite, in which is mounted any suitable mechanism adapted to oscillate a. driving arm I2. It is obvious that the arm I2 may be oscillated by a number of mediums such as-an electric motor, a spring motor, a flexible shaft, or manually operated levers similar to the well known type of hair clippers. Positioned in and guided by the outer cutter is an inner cutter I4 having a slot I9 in the base thereof with which thel driving 10 arm cooperates.

The outer cutter has heretofore been fastened to the handle by a set screw I5 and was held from longitudinal movement by a. lug I6 on the handle engaging a slot in the base of the outer cutter. l

In the present invention the same means is provided with the following difference, i. e., that the set screw I5 only prevents vertical movement of the outer cutter and the lug I6 n o longer prevents longitudinal movement, but .is used as a limit stop to permit a slight oscillation of the outer cutter. 1 I

Referring to Fig. l, it will be noted that a'slot Il is formed in the base of the outer cutter I0 and there is positioned in the slot a tapered chan- 'nel-shaped block I8 of-resilient material, such as ubber or the like. It is obvious that a piece of spring metal of suitable shape could well be substituted for the rubber. block. 'Y

'Ihe set screw I5 (Fig. 2) is formed with a re- 30 duced tip portion 20 which is adapted to enter and cooperate witha longitudinal slot 2| (Fig. 1) cut in the outer cutter I0- The screw I5 is of such a length that the tip 20 thereof prevents vertical movementt of the outer cutter but does not reach the bottom of slot 2l and hence will not bind to prevent longitudinal travel of the cutter. In

\ other words, the reduced tip 20 engages the slot 2l,` and provides a track for the cutter I0.

Theshearing head in this type of razor is insert- 40 ed in a longitudinal groove 22 in the top of the handle. In the present embodiment, a cushion 23 .of some easily deformable, yet resilient, material,

such as rubber isypositioned in the bottom of slot 22. This cushion provides a means whereby any manufacturing errors in the locating of the slot 2| can be corrected to insure the free movement of the end of screw 20 in the slot 2|. The deformable property of the rubber insures that the cutter will move easily with respectv to the bottom of the groove 22. v

The driving arm I2 for the inner cutter extends through a slot `24 in the base of the outer cutter and in razors heretofore known in the art this slot was formed suciently long to permit free oscillation of the arm I2. In the present embodiment, however, a'plug 2t of resilient material similar to the block I8 is inserted in an enlarged' portion of each end of the slot and is of sufficient size so that the arm I2 will come in contact therewith just prior to the end.- of the stroke.

Spring-pressed pins 2l are provided in the handle II which extend through the base of shear plate I0 and contact the base of inner cutter III, pressing it into shearing relation with the shear plate.

In assembling, the shearing head is inserted in the groove 22 and pressed down on the cushion 23 until the tip 20 of the screw I5 can enter'the slot 2l. The head is positioned with the lug I6 in the resilient block I8 and arm I2 passes through the slot 2t in the base and engages the slot I9 in the inner cutter Id,

In operation any oscillation of arm I2 will drive the inner cutter longitudinally. Due to the fric-` tional engagement between the inner cutter and the outer cutter, it is caused to move a short distance longitudinally against the resilient action of the block I8 and the deformation of cushion 23. As soon as the friction is overcome, the outer cutter is returned toward normal by the resilient action of block I8 and cushion 23 until just prior to the end of the stroke of arm I2, at which time the outer cutter is again moved longitudinally, due to the contact of the arm block 2B. The relative amount of movement of the outer and inner cutters is indicated by the dotted lines in Fig. 3. While the movement of the outer cutter, due to the frictional contact between the cutters is slight and may vary, the movement, due to the arm I2, is always approximately uniform.

From the above operation, it will be apparent that the outer cutter will have a slight movement relative to the handle which will cause the hair to be sifted or combed in between the blades of the shear plate where they will be cut by the inner cutter.

While I have described what I consider to be a highly desirable embodiment of my invention,

itis obvious that many changes in form could be made without departing from the spirit of my invention, and I, therefore, do not limit myself to the exact form herein shown and described, nor to anything less than the whole of my invention as hereinbefore set forth, and as hereinafter claimed.

What I claim as new, and desire to secure by Letters Patent, is:

1. In a mechanical razor, a handle, a shear plate mounted for longitudinal movement on said handle, an inner cutter cooperating with said shear plate, an arm for reciprocating said inner cutter, and resilient means in the base of said shear plate compressed by said arm for reciprocating said plate longitudinally of said handle.

2. In a mechanical razor, a handle, a shear plate mounted for longitudinal movement on said handle, a resilient mounting for said shear plate adapted to restrict said longitudinal movement, an inner cutter cooperating with said shear plate, an arm for reciprocating said inner cutter, and `resilient means in the base of said shear plate compressed by said arm for reciprocating said shear plate longitudinally of said handle.

3. In a mechanical razor, a handle, a shearing head mounted on said handle, said shearing head comprising a shear plate and inner cutter each adapted to reciprocate longitudinally with respect to each other and said handle, a lug on said handle, a slot inthe base of said shear plate, and a resilient cushion in said slot engaging said lug to limit the longitudinal movement of said plate with respect to said handle.

4. In a mechanical razor, a handle, a detachable shearing head comprising inner and outer cutter members mounted for longitudinal reciprocation with respect to each other and said handle, a longitudinal slot in the base of said outer cutter, a shouldered screw in said handle adapted to engage said slot to permit longitudinal movement of said outer cutter, said screw preventing detachment of said outer cutter from said handle, a lug on said handle, a second slot in the base of said outer cutter, and a resilient cushion in said slot engaging said lug to permit limited longitudinal movement of said outer cutter with respect to said handle.

JAMES H. RAND, JR. ALBERT M. ROSS.

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