Razor-blade-stropping device

Abstract

Claims

Aug. 19 1924. 1. B. STODDARD RAZOR BLADE STROPPING DEVIGE Filed Feb. 8, 1924 2 SheQts-Shoot 1 4 -ml i leorz ,3 ,Slddar IMNVENTOR. L. B. STQDDARD RAZOR BLADE STROPPING DEVICE Filed Feb. 8, 1924 2 Sheath-Sheet. 2 A TTORNEYS. Patented Aug. 19, 1924. anon B. s'ronnnan, or WI LI AN T reessacnusnrrsn RAZOR-TBLADE-STROPPING DEVICE. Application filed February 8, 1924. Serial 1 To..G91,408. ' ularly safety razor blades. The primary object of the invention is to provide a device of the above kind which is simple and durable in constructionand, efficient in operation. Another objectof the invention is to provide simple and effective means for causing the blade to be shifted laterally as it is drawn longitudinally of the razor strop in either direction, whereby the blade is given a path of-movement oblique to the longitudinal axis of the strop during the stropping operation, so as to insure a most effective stropping of the blade. Another object of the invention is to generally simplify and improve the construction of devices of the above kind, whereby the same may be manufactured and market ed at a relatively low cost to provide a readily and easily operable efficient device of this kind. of the invention is better understood, and the same consists in the novel form, combination and arrangement of parts herein; after more fully described, shown in the accompanying drawings and claimed. I y In the drawings, wherein like reference characters indicate corresponding parts throughout the several views, Figure 1 is a front elevational view of a stropping device constructed in accordance with the present invention and showing the blade and blade holder intermediate their operative positions, the strop being indicated in position as shownin transverse section, v Figure 2 is a side elevational view of the device shown in Figure 1 illustrating the position of parts when the blade is drawn in one direction and engaged with the strop, Figure 3 is a view similar to Figure 2 with the blade shifted and drawn in the opposite direction, Other objects will appear as the nature Figure 4 is anenlarged fragmentary view partly in longitudinal section and partly in elevation, of the device shown in Figure 1. Figure 5 is a viewsimilar to Figure 2 but partly in longitudinal section, A Figure 6 is a perspective view showing the blade holderyoke and its stationary j aw, Figure 7 is a perspective view of theadjustable jaw and its adjusting screw, and Figure 8 is a diagrammatic plan View illustrating the movements given to the blade during the stropping operation. Referring more in detail to the drawings, the presentinvention includes a separable handle 5 having its exterior suitably roughscrew; 6 centrally secured to the handle yoke 7 whereby the yoke and handle are separably connected it being however apparent that other forms of connection may be employed. The handle yoke 7 is provided with transversely alined openings 8 inthe inner portions of the legs thereof, and these openings are elongated longitudinally of the legs of the yoke 7 for a purpose which will presently. become apparent. Loosely 'enedandprovided with a screw-threaded ,socket in its inner end for reception of the disposed in'theopenings 8 of the yoke 7 is a rock shaft 9, one end of which is formed with a crank 10 having an elongated end portion 11 and disposed adjacent to the outer side of one of the legs of the yoke 7 as shown clearly in Figures 1 and l. A suitable roller 12 is secured uponthe rock shaft 9 by means 'ofa transverse pin 13 or the 'likefand this roller is substantially of a length to extend from one legto the other of theyoke 7. The invention further includes a blade holder embodying a yoke formed of' a tubular intermediate. portion '14 that is longitudinally slotted at its outer side as at 15 and which includes a short leg 16 and a relatively long leg 17, respectively dis posed outwardly of and spaced from the legs of the handle yoke, 7. The free end of the leg 16 andthe inner portion of the leg 17 are. provided with alined openings 18 in which are secured the ends of a screw shaft 19, and this shaft 19 is slidably and pivotallydisposed iii openings provided in transverse, alinement within the outer ends of the legs of the handle yoke 7. The longest leg 17 of the blade holder yoke is provided at its free' end portion with a longitudinally elongated slot 20 in which the 1 tion and is therebycaused to slide alongthe the blade holder and the shaft 19 will be shifted transversely, with respect to the st-rop 23 that is adapted to be insertedbetween the rollers 12 and 21. A spring 24 is Centrally secured upon the intermediate portion of the handle yoke 7 and has its free ends bearing against the shaft 9 at the end of the rollers 12 for causing the latter to be yieldingly forced against the under-side of the strop 23, which is permitted by the elongated slots 8. V I The blade holder preferably includes a jaw 25 the inner end portion of which is suitably rigidly secured within the tubular portion'ld of the blade holder yoke adjacent one end of the latter, and a second j aw 26 the innerend of which is slidably disposed within the tubular portion lt and which has th inner end of an adjusting screw 27 swivelled therein as at 28, the adjusting screw 27 having threaded engagement with the opposite .end of the tubular portion 1st of the blade holder yoke. The jaws 25 and 26 project outwardly through the slot of the tubular member l' lsand have their adjacent free end portions suitably formed or grooved as at 29 for engagement with the side edges of the razor blad 30 to be stropped. In operation. the adjusting screw 27 is threaded outwardly of the handle yoke member 14: so as to draw the movable jaw 26 away from thestationary ja-w a sufficient distance to permit the blade to be inserted. The blade 30 is disposed with its back portion within the slot 15 and then the screw 27 is operated to cause the blade to be clamped at its side edges-between the jaws 25 and 26 as shown clearly in Figure 4c. The strop is then directed between the rollers 12 and 21, and upon exerting a pull upon the handle 5 in one direction as indicated by vthe arrow (1 in Figure ,2, the roller 12 will-be caused to rotateso as-to swing the crank 10 and thereby cause the vblade holder to be swungso as to bring the blade 30 downwardly into engagement with the strop in a direction opposite to that in which the stropping device is pulled." As soon as the edgev of the blade comes in contact with the upper surface of the strep 23, due to the friction of the roller 12upon the strop, the roller 12 is prevented from rotaunder surface of the strep, but continued el f the oller-121, isrerm ited; 1. .1 tdthe fact that shaft 19 is held from rota- 3. When the handle is pulled in the direction of the arrow 6, the operation is reversed so as to cause the blade to be shifted transversely of the strop in the opposite direction, It is well known that this compound H10V81I1QI1t BfiGCtS a most desirable stropping of the blade. From the foregoing description it is believed that the construction and operation as well as the advantages of the present invention will be readily understood and appreciated by those skilled in the art. IVhaL I claim as new is 1. In a razor blade stropping device, a handle, a yoke centrally attached to the handle, a screw shaft journalled in'the yoke and slidably disposed therein, a blade holder including a yoke fixed to the ends of said screw shaft, a roller disposed within the handle yoke and threaded upon the screw shaft whereby theflatter may be shifted transversely ofthe handle, a rock shaft disposed inwardly of the screw shaft and journalled in the handle yoke, a second roller fixed upon said rock shaft, and operative connections between the rock shaft and the yoke of the blade holder for causing the latter to swing in the opposite direction in which the handle is drawn. 2. In a razor blade stropping device, a handle, a yoke centrally attached to the handle, a screw shaft journalled in the yoke and slidably disposed therein, a blade holder including a yoke fixed to the ends of said screw shaft, a roller disposed within the handle yoke and threaded upon the screw shaft whereby the latter may be shifted transversely of the handle, a rock shaft disposed inwardly of the screw shaft and journalled in the handle yoke, a second roller fixed upon said rock shaft, operative connections between the rock shaft and the yoke of the blade holder for causing the latter to swing the opposite direction in which the handle is drawn, and blade holding means including a stationary jaw and an adjustable jaw' carried by the blade holder yoke. 3. In a razor blade stropping device, a handle, a yoke centrally attached to the handle, ajs crew shaft journalled in the yoke and slidably disposed therein, a blade holder including a yoke fixed to the ends of said screw. shaft, a roller disposed within the handle yoke and threaded upon the screw shaft whereby the latter be shifted transversely of the handle, a rock shaft dis- 'posed inwardly of the screw shaft and jourtions between the rock shaft and the yoke of a the blade holder for causing the latter to swing in the opposite direction in which the handle is drawn, the operative connection between the rock shaft and the blade holder yoke comprising a crank upon one'end of the rock shaft, and an elongated leg having a longitudinal slot in which the crank is loosely and pivotally disposed, said elongated leg forming part of the blade holding yoke. l. In a razor blade stropping'device, a- handle, a yoke centrally attached to thehandle, a screw shaft journalled in the yoke and slidably disposed therein, a blade holder including a yoke fixed to the ends of said screw shaft, a roller disposed within the handle yoke and threaded upon the screw shaft whereby the latter may be shifted transversely of the handle, a rock shaft disposed inwardly of the screw shaft and journalled in the handle yoke, a second roller fixed upon said rock shaft, operative cone nections between the rock shaft and the yoke of the blade holder for causingthe latter to swing in the opposite direction in which the handle is drawn, said rock shaft being shiftable toward and away from the screw shaft, and yieldable means carried by the handle yoke for normally urging said rock shaft and the roller carried thereby toward the screw shaft. In testimony whereof I afiiX my signature. LEON B. STODDARD.

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