US1612323A - Razor-blade-sharpening device - Google Patents

Description

Dec. 28 1926. 1,612,323

` R. C. G. STAATS-OELS RAZOR BLADE SHARPENING DEVICE INVENTOR RUDOLPH C. GST/Cin 723 05m ATTORN EYS Patented Dee. 2s, 1926.

UNITED vsiisfrias 'PATENT oFFicE.

V RUDOLPH C. G. STAATS-OELS, OF BROOKLYN, NEW YORK.

RAZOR-BLADE-SHARPENIN G DEVICE'.

Application filed November 28, 1924. Serial No. 752,548.

This invention relates to improvements in devices for sharpening safety razor blades and the like, and has for one of its objects to provide an improved device of this nature whichl is simple and practical in construction and-by means of which a razor blade may be eiectively and easily sharpened.

Another object is to mount the sharpening rollers in the casing or body of the device and to supporta razor blade in association therewith in such manner that pressure of the rollers against the bladey will be trates preferred embodiments of tlieinve'n'-y tive idea.

In the drawing- Figure 1 is a perspective Jview of one form l -o the invention, showing arazor blade in position to be sharpened;

Figure 2 is a transverse section. of the device shown in Figure 1;

Figure showinga diierent form; v vFigure 4 is a fragmentary vertical longitudinal section of the form shown in Figure 3; and taken on the line 4.--4 'of said figure;

Figure 5 is a transverse section of still another form 'of the invention;

Figure 6 is a diagrammatic view showing the manner in which the blade is engaged by the sharpening rollers;

Figure 7 is a vertical sectional View through one form of blade holder Whichl may be employed in connection withthe invention; and l `Figure 8 is another form of blade holder. Referring to the drawing and more par tic'ul'arly toFigure's 1 and 2, the device is shown` as comprising a rectangular casing l0 made of 'any suitable material and having a handle 11, projecting-from one end thereof which will permit ot the device being readily grasped in the hand and adjustedto `any desired position whensharpe-ning afblade. Ex-

3 is a view similar to Figure 2 'tending throughout the interior of the casing 10 is a pair of partitions 12. Radially disposed with respect to the longitudinal axis of the casingand intersecting on a line coincident with said axis to provide a pluralit7 of compartments 13, 14, 15 and 16, each of triangular formation.

Contained Withinr the compartments are sets of sharpening rollers 17, 18, 19 and 20 of different characteristics, the rollers 17 and '18 being preferably made of stone and steel, respectively, While .the sets of rollers 19 and 2O are covered with different kinds dof leather which aid in the sharpening ofl the razor. 'The rollers of each set are loosely ,journaled inthe ends of the casing 10 yfor lateral movement therein with respect to f their longitudinal axes sopas to permit the rollers of each set t o have' a certain amount of movement relativev to each other. The

rollers are normally supported Within the casing sideby sideinthe position shown fin Figure'2 with their-'surfaces in engagement With-l each other andare assisted in maintaining tliis'position by the portions of the partitions 12 which form the inner Wall of the respective compartments in which the ments and' which also forms one side of the casing 10 isprovided throughout its length with `a slot 21 the longitudinal edges of lwhich are inturned to form the ianges 22. The inner -edges of said flanges are designed to contact 'the surface of one of the adjacent sharpening rollers to further aid in supporting the' rollerin its operative position. The material of whichthe casing is formed is made suiiciently flexible so that an 'inward pressure upon any side of the casing adjacent the' slotv 21 therein will be transmitted through the fianges 22 to the rollers engaged thereby and, .owing t o the inwardly con` verging relation of the inner sides of the compartment in which vsaid rollers are mounted, it will be obvious that this pressure will force the rollers into tighter engagement vwith each other and that this enanges 22. 4 n In accordance with the present invention a safety razor blade 23 or the like is adapted to have the edge to sharpened inserted through any one of the slots 21 into engagement with the set of rollers in the compartment in which said slot is formed so that edge will come into engagement with the rollers at their point of contact. In this manner the edge of the blade to be sharpened will be interposed between said rollers and owing to the eonvexity of the latter, 1tu will be obvious thatv as the blade is reciprocated back and forth longitudinally in the slot 21 the rollers will effect a sharpening of the blade by imparting a hollow ground edge thereto, as clearly shown in Figure 6. The invention further provides means for holding the blade while being sharpened s o that the blade will be maintained in a position perpendicular to the plane extending through the axes of the rollers and interv secting the point of Contact therebetween.

In Figure 7 a holder 24 is shown for a blade 25 of a well known make, which blade is provided with one or more openings 26 therein. The holder is formed from a single sheet of suitable material, such as metal,

vbent upon itself and having its bent portion spaced suiiciently apart to receive the blade 25 therebetween. One sideof the holder is provided with one or more projections 27 corresponding in number to the number of openings 26 in the razor blade and adapted to project through said openings and in to oppositely disposed openings 28 formed 1n the opposite side of the holder. The free edges 29 of the holder 24 are curved outwardly, as clearly shown in the various figures, and are designed to engage the side of the casing 10 adjacent the longitudinal slot 21. It will be apparent that, when the blade to .be sharpened is inserted into the slot 21 and the edges 29 of the holder engage with the side of the casing adjacent the edges of said slot, inward pressure exerted upon the l holder will be transmitted to the rollers through the flanges 22 and in this manner the rollers will be caused to engagethe edge of the blade to be sharpened with the def sired pressure. The holder and blade may then b'e reciprocated between the rollers and longitudinally of the slot 21 until a suitable edge has been formed upon the blade. After a blade has been' sharpened by one set of rollers the same may be withdrawn and the device turned in the hand to present another set of rollers uppermost and the yoperation above described may then be repeated.

The holder 30 shown in Figure 8 is of substantially the same construction as the holder 24 and simply shows a slightly different design which will accommodate a blade 3l diflering in construction from the blade 25.

In the form of the invention shown in Figures 3 and 4, the casing 32 is again of rectangular formation and made of material having at least a slight degree of iiexibility.

In c'ontradistinction to the construction shown in Figure 1 the casing 32 is provided in one side thereof with a longitudinal slot 33. In this instance the ends of the casing 32 have mounted thereina rotatable shaft 34, one end of which projects beyond 'the adjacent end of the casing and has mounted 37, 38, 39 and 40are mounted in the plates l 36 in such manner that the same will have a slight lateral movement relative to each other and to their longitudinal axes. Each set of rollers is mounted in a compartment formed by the inwardly converging and radially disposed partitions 41 which aid in supporting the rollers in their operative positions. When a set of the rollers, such as the set 38, is in operative position with respect to t-he slot 33 the flanges 42 formed by the inturned `longitudinal edges of said slot engage the rollers so that when pressure is exerted upon the holder 24 the rollers will be forced into tight engagement with the blade to be sharpened as previously described.

In order that any set of rollers may be held in proper position with respect to the slot 33 and prevented from displacement relative to such position by an accidental rotation. of the shaft 34, a latch 43 secured to i each endJ of the casing 32 is engaged with any one of the series of notches 44 'formed in the periphery ot' the adjacent disk or plate 36 the spring thus yicldably retaining the disk stationary.

In Figure 5 the casing 45 is also rectangular in formation, but is elongated in cross section as compared to the casings 10 and 32 so that the various sets of rollers 46, 47, 48 and 49, similar to the sets previously described may be arranged in horizontal alignment across the interior of the casing. Again these sets of rollers. are journaled in the easing sothat the rollers of each set have a slight movement relative to each other and the contacting surfaces of each set are disposed directly beneath a suitable slot 50 extending longitudinally through the top of the casing. The rollers of each set are mounted between two downwardly converging partitions 51 which aid in supporting said rollers and which cause the same to be forced into tight engagement with each other when downward pressure is exerted upon the rollers by the insertion of a razor blade into the associated slot 50. Preferably the adjacent intermediate portions are formed of single sheets of suitable material bent into inverted V shape, as clearly shown in Figure 5.

The sets of steel rollers 18, SSand 47 may be provided, at suitable intervals, with annular grooves 52 Whichpermt ofthe escape from between the rollers of minute shavings from the razor blade as the latter is reciprovmounted in said-compartment and engaged by said inturned flanges so that When pressure is exerted upon the latter said rollers will be forced into tight engagementwvith each other by Athe inclination of said partitions relative to each other.

2. In a razor blade sharpening device, a

casing having a longitudinal slot therein, a

rotatable shaft extending through said cassaid partitions and capable of being brought into registration with the slot in said casing by rotation of said shaft.

3. In a. razor blade sharpening device, a casing having a. longitudinal slot therein, a rotatable shaft extending through said casing, disks carried'by said shaft, radially disposed partitions extending between said disk to form compartments, a set of rollers Supported in each compartment by said partitions and capable of being brought into registration with the-slot in said casing by rotation of said shaftband means engageable with said disks to yieldably maintain each set 'of rollers in operative position with respect to said slot. f s e In testimony whereof I have ailixed my signature.

RUDOLPH (1G, STAATS-OELS.

Images