US944282A - Apparatus for stropping razor-blades. - Google Patents

Description

W. SCHMIDT. APPARATUS FOR STROPP ING RAZOR BLADES.

' APPLICATION-FILED SEPT. 15, 1909.

Pat ented Dec. 28,- 19091 UNITED STATES PATENT WILLIAM SCHMIDT, or JERSEY crrY HEIGHTS, NEW JEnsEY, As'sIeNoE '10 SIMON ZINN,OF NEW YORK, N. Y., A. FIRM.

APPARATUS FOR STROPPTNG RAZOR-BLADES.

Specification of Letters Patent. Patented Dec. 28, 1909.

Application filed September 15, 1909. Seria No. 517,790.

' tact with an ordinary strop, the instrument containing in itself the stropping means, and being capable of operation on any suitable pliable or yielding surface; and'for this purpose the invention consists ofa stropping apparatus which comprises a supporting frame, drive-rollers supported in the lower part of said frame, stropping rollers supported above said drive-rollers, actuating gear-wheels between the drive-rollers and stropping rollers, an independently oscillating blade-holder pivoted to the frame between the pairs of driving-rollers, means for arresting the blade-holder when swung in either direction, means for returning the .blade-holder into upright position, and

means for impartin rotary motion to the stropping rollers, before or after the contact, of the edge of the razor-blade, with one stropping roller or the other has been made.

'The invention consists further of certain details of construction which will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawing, Figure 1 represents a side elevation of my improved razor-blade stropping apparatus, Fig. '2 is a plan-view of the same, Fig. 3 is an end-elevation, and Figs. 4 and 5 are. vertical transverse sections respectively on lines 4:, 4 and 5, 5, Fig. 2, Fig. 4 showing the blade in contact with one of the stropping-rollers for stropping. v

Similar letters of reference indicate corresponding parts throughout the several figures.

Referring to the drawing, 0 0. represent front and rear plates of the supporting frame of my improved apparatus for stropping razor-blades. The front-plate a is attached'to' a handle, while the rear-plate a? is made U-shaped, both plates being prolower surface of the same.

- vided with suitabl e 'bearings for the shafts of a pair of lower driving rollers .b, .6 and v a pair of up er stropping rollers 'd, al An independent y oscillating blade-holder e is located midway between the drive-rollers b,

I1 and pivoted to the front and rear-plates a The blade-holder e is supported on the flat upper surface of a roller e whichis of a larger diameter than the drivin -rollers I 11 so as to project somewhat be ow the holders is connected at its'inner end by a helical spring 8 with a pin 0 on the'front or The bladehead-plate a of the supporting frame a, said spring serving for holding the blade-holder in upright osition when the a paratus is not required for stropping. T e op osite end of the blade-holder supportin ro ler e is provided with a stop-pin e t at abuts against the lower cross-piece of the supporting frame so as to arrest the blade inserted into the holder-" e at the proper angle of inclination to either one of the stropping-rollers for the stropping action, as, shown in Fig. 4.

The lower driving-rollers b, b are prefer ably made of hard rubber or other suitable material, while the stropping rollers are made of prepared stropping leather or other material, the stropping rollers being of suit able diameter for imparting the proper shaving angle. Motion' is imparted from the shafts-of the driving-rollers b, b by means of gear-wheels -g which are mounted loosely on the shafts ofthe drivi -rollers and intermediate pinions g mountggloosely on short stud-shafts on the front or headplate a to gear-wheels g keyed to the shafts of the stropping-rollers. On the shafts of the driving-rollers are placed radial pins f. which engage pins f attached to the gearwheels 9 so as to take the same along and impart by the transmitting gearing motion to the stropping-rollers in one or the other direction according to the direction of motion of therollers of the stropping appara-'v tus. The pins on the shafts of the driving rollers are located between the two pins on i the lower gear-wheels g, so that the rotary motion of thestropping rollers in one or the opposite direction is started as soon as the pm on the shaft of one driving roller en gages one or the other of the pair on the lower gear-wheel g.

When the stropping apparatus is to be op.-

of pins f erated, it is moved over any suitable contacting surface, first in one and then in the opposite direction after the blade to be stropped has been inserted. in the blade holder. As soon as'motion .is' imparted to the stropping ap aratus by the contact of the contactin I riction surface with the lower part 0% the blade-holderv carrying roller,-the latter moves the blade-holder in one direction and theblade in inclined position toward one of the stropping-rollers, as

shown in Fig. 4, so that the edge of the blade forms contact with the same, as. shown a which the blade has formed contact.

.in Fi 4. During the positionin of the incline blade on the stropping-rol er, no motion is imparted to the stropping roller with As soon as the blade is set in inclined position on the stropping-roller, the driving-roller then below the strop ing-roller is rotated transmitte' by the pin or its shaft to one of.

the pins on the lower gear-wheel to the other stropping-roller, so that the opposite side of the edge of the blade is subjected to the stro ping action of the rotating stropping .jro ler. v e .motion of the stropping apparatus 'over the contacting friction surfacein one direction or the other is continued until the stroppingof the blade is accomplished. ;As soon as. the-apparatus is inoved out of contact with the contacting surface, the blade-holder is then returned into upright position between the driving and stropping-rollers' by means of its spring. By moving the blade over into con? tact with one or the other stropping-rollers,

the edge of the blade forms contact with one of the other stropping-rollers before the r0 tary motion takes lace owing to the lost motion produced be ore the pin on the shaft of the driving-roller engages the pin on the gear-wheel, so that the surface of the stropping-roller is not injured by the contact of the blade with the, same as no. motion in either direction is imparted to the stropping roller until the engagement of the pin on plished.

blade-holder and its contact with one orthe the; driving-roller with oneof the pins on the transmitting gear-wheels g is accom- The oscillating motion of the other "stropping roller is accomplished by the frictional contact with any contacting surface, so that the stropping of the edge of p the frame, a pair of stro theblade is accomplished and a very effective stropping action obtained. The shopping apparatus has also the further advantagethat it is utterly imposible to injure either the blade or the stropping rollers even when the apparatus should be brought into in erted position for-application, as the stropping'rollers would rotate freely, while the blade remains stationary, as it is not brought into contact with one of the stropping rollers or a contacting surface.

The stroppin' apparatus is mainly intended for the hlades ofsafety-razors, but it is obvious thatit can be used for stropping the blades of ordinary razors provided that the stroppin -device' is made of a suiiicient size for taxing up and holding the blade.

It is understood that slight modifications in detail of the parts shown, as for instance the substitution of frictional contacting wheels instead of gear-wheels will be within the scope of this invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patentzi 1. A," razor-blade -stropping apparatus comprising a supporting frame, a pair of drlving and stroppin rollers supported on said frame, an osci lating bladeholder, means for'bringing the blade-holder back to upright position, and motion transmitting means between'the shafts'of the driving and stropping rollers for rotating the latter.

2. A razor-blade stropping apparatus comprising a supporting frame; an independently oscillating blade holder pivoted to said frame, a stop for arrestingthe oscillating motion of the blade-holder when moved in one or the opposite direction, a pair of driving rollers, a pair of stropping rollers and means for transmitting motion between the driving and stropping rollers for actuating the latter.

3. In a razor-blade stropping'apparatus, the combination of a supporting frame, an independently-oscillating blade-holder pivoted to the frame, a roller supporting the bladeholder, a centering spring engaging the blade-holder and frame, means for arresting the motion of the blade-holder, driving-rollers supported in the frame, stropping rollers supported in the frame above the driving rollers, gear wheels for transmitting motion from the driving rollers to the stropping rollers and mechanism between the driving rollers and the stropping rollers for imparting rotary motion to the stropping rollers. 4,. Ina razor-blade stropping apparatus, the combination of a supporting frame, a pair of driving-rollers, one ateach side of ping rollers above and parallel with the riving-rollers, an independently oscillating blade-holder, a

blade-holder supporting roller pivoted to the frame between the pairs of driving and 'stropping rollers, said supporting roller being of proper diameter, a centering spring between the rotary-shaft and frame, gearwheels for transmitting rotary motion from the shafts of the driving-rollers to the stropping rollers, engaging pins on the shafts of the driving-rollers and a pair of pins on the gear-wheels of the driving-rollers, one on each side of the radial pins for permitting a In testimony, that I claim-the foregoing s as my invention I have signed my name in presence of two subscribing witnesses.

NVILLIAM SCHMIDT. Vitnesses:

PAUL GOEPEL, FANNm FISK.

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