US1596082A - Razor - Google Patents

Description

Aug. 17 1926. 1,596,082

W. H. CURTIS RAZOR Original Filed June 14. 1922 A: ;0RNEY Patented Aug. 17, 1926.

UNITED STATES 1,596,082 PATENT OFFICE.

WILLIAM CURTIS, OF PORTLAND, OREGON, ASSIGNOR '10 AUTO STBOP SAFETY RAZOR COMPANY, OF NEW YORK, N. Y.

RAZOR.

Application filed June 14, 1922, Serial No. 568,292. Renewed February 11, 1928.

My invention relates to automatic stropping safety razors, such for example as the one soldin the market as the auto-strop.

The direct object of my invention-is to provide mechanism in an automatic stropping sa'fetyrazor which will prevent the cuttingor nicking of the 'strop during the operation of stropping and also gives a greater degree of leverage to the device during{the stropping operation. I

I azors of the type mentioned are stropped without removing the blade from the holder, certain actuating rollers being so arranged as to causereversal of the blade at the beginning-of each stroke, these actuating rollers beingicaused'to operate'by the friction of on the line 33 of Fig. 1, w1t

the strop, whichzis held stationary. Wear on these actuating rollers or" lost motion due to wear-of the moving partsfcauses a slight slippage of the bladexand, holder at the be?" ginningof the stropping'stroke, before re-' versal of the blade takes place with the result that the blade often cuts into the strop. Frequently the strop'is cut entirely in two and ruined for'further, use; My invention afi'ords a positive andeflieient remedy for this defec 1 A further object my invention is to.

provide a mechanism in which a rmer stropping stroke can be obtained ,than at present. In thesetypes of razors as now constructed, the leverage obtainable between the strop and the blade is limited because they are very nearly parallel. In my invention it is possible to exert a greater degree of pressure of theblade on the strop because the blade holding head is pivotally mounted on the handle and therefore can be disposed angularly to the strop and can thus allow the cutting surface of the blade to be brought closer to the line of the .applied force.

The details, mode of operation and particular features of my invention will be more readily understood by a description of the accompanying drawings, in which:

Fig.1 is a front elevation of the complete razor;

I Fig. 2 is a side elevation of Fig. 1;

Fig. 3 is a section taken ap rox'imately the blade guard omit-ted showing the operating position of'the razor, mechanism and stropat the end of a stropping stroke in the direccept that it shows the operating position of the razor, mechanism and strop at the beginning of a stropping stroke'in-the direction of the arrow; and

Fig. 5 is a fragmentary section and shows an adaption of the sleeve which will efiectually elminate play between the handle and the head.

For convenience I have illustrated my invention as appliedto a self. stroppin safety razor of a well known'type, but 0 course which is pivotally connected tothe handle'by the pin 0. The slot 8 is so cut as to leave a central portion projecting upward to form the stop d, the lower portion of part b being so formed as to engage stop d thereby limiting the pivotal movement of?) to a prede termined amount.

A sleeve f is slidably mounted on the handle a and arranged to slip over lower a .portion of part blocking b rigidly in'cenf tral position as shown in Figs. 1 and 2. The sleeve f has internal screw threads 71.

cut in the upper ortion thereof so arranged to engage screw t eads h on the part b and to permit the sleeve 7 being locked in the position shown in. Figs. 1 and 2.

A shoulder f on the sleeve f is adapted to seat on the shoulder a on the handle a and threaded to the head as at h, for eliminating any play between the head and the handle of the razor.

The frame 71 of the razor is rigidly affixed to part b. The guide rollers j and j, actuating roller 7' and blade carrying roller 7' are mounted in the frame, 2'.

The rollers 7' and j are geared together by the gears 70 and is (see Fig. 2) in such manner that j is actuated by j in an opposite direction to the rotation of j The blade Z is suitably and detachably fastened to the roller j. m represents a stop of suitablp 1material; f h

ever 0 as or its urpose, t e raising and lowering of the blal de ard n. Low ering of the blade guardn rees the blade Z to enable the performinw of the stropping operation. By holding the blade 1 a ainst the blade guard n and then raising the lade of the blade are engaged in clips 12 and p. and thereby held in proper shaving position.

The operation of my invention may be described as follows:

The blade 1' is first disengaged from the blade guard n by lowering n by means of the lever 0. The sleeve f, which is assumed to be in the position shown in Fig. 2 is'then unscrewed disengaging threads 72. and h and the sleeve f then slipped downward on handle a to any portion below the part I), such as shown in Figs. 3 and 4. The strop m is then inserted over rollers j and j and under roller j". If the razor now be pushed along the strop in the direction shown by the arrow Fig. 3, the frame 11 and blade I will assume the osition shown, the blade being held firml y against the strop by the force of the friction of the strop on roller y' which is geared to the blade holding roller j, as described. The position of the moving parts at the end of the stroke in the direction of the arrow will then be as shown in Fig. 3.

At the beginning of the return stroke, since the razor is moved along the strop solely by means of the handle a, the moving parts will assume the position shown in Fig. 4, before the rollers j, j, 9' and frame 21 start to slide on the strop inasmuch as these parts are ivotally connected to handle a by pin 0. Stop d predetermines the amount of tilting action that takes place. This action of tilting the frame 12. before it actually starts moving along the strop raises the blade 1- from the strop to the position shown (Fig. 4) thereby positively preventing and avoiding any possibility of the blade cutting into the strop. Further movement of the razor in the direction of the arrow (Fig. 4) along the strop will cause the roller 7' to function; since part b has engaged stop d, rotating the blade Z in a clockwise direction, to the position shown by dotted lines 7' in which position blade Z will be firmly held by the force of friction on roller j as long as the razor is moved in the direction of the arrow in Fig. 4. Since the working parts are symmetrical it will readily be seen that the operation of the working parts will be relatively the same at the end of the second stroke and the beginning of the third stroke, as has just been described for the end of the first stroke and the beginning of the second stroke. Hence the operation may be repeated ad infinitum. v

When the blade has been sufficiently stropped the strop is removed, the sleeve 7'' is returned to the position shown in Fig. 2, and the blade engaged in clips 79 and p on the blade guard 72. in the manner previously described and the razor is then ready to use.

I claim:

1. In a razor of the character described, a

head having a blade carrying roller and an actuating roller and means for imparting the rotation of the latter to the blade carrying roller, the head being adapted to have a strop inserted therethru on which said actuating roller bears, a handle on which said head is pivotally mounted so as to have limited angular movement with respect to the handle, whereby the movement of the handle in one direction causes a tilting of the head in the opposite direction lifting the blade from the strop in advance of the action of the actuating rollers, and means to limit pivotal movement of said head respecting" said handle.

2. In a razor of the character described, a I

head having a blade carrying roller and an actuating roller and means for imparting the rotation of the latter to the blade carrying roller, the head being adapted to have a strop inserted therethru on which said actuating roller bears, a handle on which said head is pivotally mounted so as to have limited angular movement with respect to the handle, whereby the movement of the handle in one direction causes a tilting of the head in the opposite direction lifting the blade from the strop in advance of the action of the actuating rollers, and means for securin the head firmly in vertical alinement wit the handle.

3. In a razor of the character described, a head having a blade carrying roller and an actuating roller and means for imparting the rotation of the latter to the blade carrying roller, the head being adapted to have a strop inserted therethru on which said actuating roller bears, a handle on which said head is pivotally mounted so as to have limited angular movement with respect to the handle, whereby the movement of the handle in one direction causes a tilting of the head in the opposite direction lifting the blade from the strop in advance of the action of the actuating rollers, and removable means for securing the head firmly in vertical alinement with the handle.

4. In a razor of the character described, a head having a blade carrying roller and an actuating roller and means for imparting the rotation of the latter to the blade carrying roller, the head being adapted to have a strop inserted therethru on which said actuating roller bears, a handle having a socket in which said head is ivotally mounted, the adjacent portions 0 the handle and the head being spaced apart and provided with a groove and tongue respectively permitting limited angular movement of the head relative to the handle, whereby the nectinigrthe head and the handle to hold the head mly in vertical alinement with the handle.

5. In a razor ofthe character described, a

5 head having a blade carrying roller and an actuating roller and means for imparting the rotation of the latter tothe blade carrying roller, the head being adapted to have a strop inserted therethrn on which said ac- 10 tuating roller bears, a handle on which said head is pivotally mounted so as to have limited angular movement with respect to the handle, whereby the movement of the handle in one direction causes a tilting of the head in the opposite direction lifting the blade from the strop in advance of the action of the actuating rollers, and means cooperative between said head and handle to limit pivotal movement of said head in opposite directions.

WILLIAM H. corms.

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