US1920847A - Sharpening device for safety razor blades - Google Patents

Description

Aug. 1, 1933. w. R. DAUGHTRY SHARPENING DEVICE FOR SAFETY RAZOR BLADES Filed Oct. 2, 1929 INVENTOR AIIORNEY Patented Aug. 1, 1933 SI- IARPENING DEVICE FOR SAFETY RAZOR r BLADES William R, Daughtry, Birmingham, Ala. H Application October 2, 1929. Serial No. 396,873

Claims.- (C11 51--84-) The present invention relates to improvements in sharpening devices for safety razor blades, one object-of the invention. being to provide'a'handoperated device-havinga holding stock which 5. bodily carries a rotary sharpening member, a pivoted frame upon which is mounted the blade carriage, and a manually operated' meansfor simultaneously rotating the roller and imparting. reciprocating movement to the blade carriage,

thus insuring an even sharpening'to't-he edge.- or edges of the blade-due tothemovement of the blade upon therotarv member, and the rotation of thelatter. i V

Another object of. the present invention is to pnovideaadeviceof thischaracter which is attractive: in appearance; cheap in construction, and; which is-thoroughly efiicient' andpractical' in: use.

,Withgthe foregoing and other objects in; view,

whichtwill appear as thedescription proceeds, the 2D invention resides in the combination and arrangements ofrparts; and inZ-t'hedetails of construction hereinafter described and claimedflt being understoodthat changes inthe precise-embodiment of, the invent-ionherein disclosed can be made withinathescopeof what isolaimed, without departing'fromth'e spirit ofthe invention;

Inthe accompanying drawing:-

Figure-1- is a side-elevation of the complete'device, a portion of the driving gear wheel being broken away, andv dotted lines illustrating the.

position of the blade carriage 'ycarrying frame when elevated;

. Figure 2511s a top plan view: of the complete device'as'illustrated in Fig. 1.'

Figure 3 is an end view of the complete device, thestock: being fore-shortened or broken away. Figureeisa section taken on line 44:ofFi'g. 2 Figure 5lis a top plan view of the central portion: of a modified form'soi the present device,

wherein'twmparallel rollers. are-employed", and by means of which. the-two oppositeiedges of the safety razor blades are" operatedupon simultaneously.

Refer-rmgato'the drawing, and more particularly.

' to Figuress 1, 2 and 3,.the reference numeral 6 designates the stock ofthe'present device and: '7. represents a; hand: grip or. handle therefor.

' Anchorediin the stock andEexten'ddinzanopposite' direction. to? the handle isan axle:.8, the 5 outen'end' of which is upwardly bent as 'atQ' to provide a right-angled armL-IO and az limiting hook 11, the: purpose: of which" will presently appear. v 9 f 3.

Mounted for: rotation upon: the axle 8- is. an 5 abrasive roller 12;. which: isadapted 'toabe driven by: means of a' gear 13' fastened torthe inner end of said: roller.

Rotatably supported by means ofa stud mem-- 'ber 14 carried by the. stock 6,.is a maingearwheel 15,,whose teethlfiare .upon:the inner face there-- of: and: meshwith the gear 13 so that as the gear wheel15 is a rotated rotary motion: is impartedto theabrasive roller l2.' A- pin17 iscarried by the gear wheel- 15' and projects from: the outer face thereof; and: disposed thereon is a'loopi 18 of" a' connectingrod: 19 ofwhich one-branchis longer thanithemther, the'purpo'se' of which:will present-- 1y appeanwhile further carried'by .thepin- 17 is an operating handle-'20 by' means. of: which the present mechanism may be'manually' operated;

A frameF, whichxis madeof: a single piece ofwire and bent to provide "two spaced parallel'rods v 21;, islmounted forswinging: movement through thermedium of twocoils 22 upon theportion 1 0 of the aX1e:-8,so that ,thesaidcframe may be moved to assume the respective full and broken line: positions" as shown' in" Fig.1

The. outer. portions of the rod' 21 are bent toward; each other, and: are coextensive as atv 23: and terminate in a! finger loop 24, while attached tozthe StOCkTB' is: a clip. 25 which forms'a latching means, forrengaging the portion 23 of the'frame' Fito hold! the same inoperative position.

- Mounted for sliding movement upon :the parallel rods of the frame, is a blade carriage 26;} two openings 27 ofwhich are of larger diameter," andtfitiupon the rods 2l,so:that thescarriage'may be; reciprocatedr freely upon these rods and longitudinally of 'the roller .12. In order that a safetyrazor blade of well known. type may be. properly attached and detached from the: carriage, two springs 28 are sccured'to the carriage by a fa s't'enerfifl so that the notch terminals 29 of the springs may-extend below the lower face of the: carriage and enter the: apertures. of the: safety razor blade B, toengage the wallsflthereof so as to hol'ol the blade'in the position illustratedin both full and dotted lines in Figure 1", and thus to present one cutting edge-as in Figure-'2; to'and upon the abrasive roller 12. v I

In order that reciprocatingmovement may. be impartedto the blade carriage 26, the longer branch 31 of the connecting rod1'9' is provided with anL-shaped terminal 32-, which isextended through a transverse-bore 33 of the carriagezfi, and: thus connects the carriage. to said rod, so that when the handle 20 is turnedto rotatethe gear wheel 15, reciprocating movement is im-, parteditb the carriage so that the blade is moved back and forth, while the roller 12 is being rotated through the gears and 13.

By this means the roller is rapidly rotated against an edge of the razor'blade and a reciprocating movement is imparted to the carriage, thus stropping or honing the safety razor blade.

Where the gears 13 and 15 are employed, it is possible to'use a friction between them, so that the speed imparted to the roller'12 n'iay'be-regulated by the pressure upon the handle in an inward direction during the rotation of the wheel 15, and thus provide a means whereby duller blades may be more efficiently sharpened, and those that do not need so much grinding may be operated upon with a lighter touch. I

It is also apparent that the frame F maybe bent outwardly or inwardly toward the roller or away therefrom so as to regulate the spring tension of the rods 21 relative to the carriage and the abrasive roller, so that the desired pressure of the blade upon the roller may also beregulated. As shown in Figure 5, two rollers 12;and'12 may be employed, thus providing two abrasive members for simultaneously acting upon the two opposite-edges of a safety razor blade, the axles 8 and 8 being parallel and the terminal portion 10' common to both axles 8 and 8 serving to retain the adjacent ends of the two rollers at a'fixed distance fromone another. The rollers '12 and lz are provided, respectively, with gears 13 and 13 meshing with one'anothen'so that when the gear wheel 15" is rotated it will rotate the abrasive rollers 12" ,and 12. Other elements are identical with the structure heretofore recited, so that corresponding parts are indicated by the same referencenumerals' primed.

From theforegoing' description taken inconnection with the'drawing, the operation of the presentdevice is readilynnderstood, and "its advantages fully :appreciated, butbriefiy stated, it is asfol1ows: l

The frame F ismoved to assume the dotted line position in Figure 1 and the blade to be operated upon is then positioned on the carriage 26with thenotchedwterminals 29 of the springs'28 ex-- tending through the usual openings of the blade, the outward tension of the springsbeing such as to cause the notches'toengage' the walls 'of the openings of the blade and tend tohold the blade against the abutting surface of the carriage 26. The frame F is now'lowered to bring the. portion 23 of the frame into the clip 25, at which "time the edge of the blade B is resting upon and engages the roller il2. The handle 20 is now turned to rotate the abrasive roller 12 and reciprocate the carriage 26'to sharpen one side of one edge of the blade. When this is completed, the blade is removed and reversed, and the other side of the same edge isoperated upon; and where'the blade is a double edge type, sides of the edge are sharpened in a, similar manner;

5 With the construction shown inFigure 5 the same operation takes place, except that both cutting edges ofone face of the blade are acted upon simultaneously, and onlyrtwo operations are necessary instead of four as in the case when a'doubleedge blade is sharpened by a single roller to complete the "sharpening of both edges. What is claimed is: r

11A sharpener of the class described having a sharpening roller, an inherently resilient'frame substantially parallel to the axis of the roller, a blade carrier reciprocable along said frame and yieldingly urged toward the roller by the resiliency ofrsaidframe, means mounting said roller and frame, and driving mechanism mounted on said means and operatively connected to the carrier and to the roller for simultaneously reciprocating the carrier and rotating the roller.

2. A safety razor blade sharpener having a rotatable abrasive roller, a resilient frame disposed parallel to the straight surface line of the roller, a blade holder mounted on said frame and reciprocable along said frame and yieldingly urged by the resiliency of said frame toward the roller, driving means including a crank for rotat- Lingv the roller and simultaneously reciprocating the blade holder; and support means for the roller, the resilient frame and the driving means.

3. A safety razor blade sharpener comprising a rotatable abrasive roller, a frame including two resilient wires disposed adjacent the straight surface line of the roller and substantially parallel thereto, hinge means mounting one end of said frame and latch means adapted to hold the other end of said frame to a support, a blade holder reciprocably mounted onsaid -frame and urged by'said frame toward the roller, driving means including a crank for rotating the roller and simultaneously reciprocating the blade holder; and means mounting the roller, the driving means and the latchmeans. I Y

4; A sharpener of the class described having a stock, an axle extending forwardly therefrom, a sharpening roller journaled on the axle, a resilient frame disposed parallelto said axle and located above the roller and laterally offset with respect to the axis thereof, said frame being connected-to the axle and to the stock, gearing on the stock and roller to rotate the roller, a blade carrier mounted to reciprocate along said frame longitudinally of said roller and yieldingly urged by-the resiliency of said frame toward said roller, jand'an-opera'tive connection between the gearing and said blade carrier.

5. A'sharpener for safety razor blades comprising astock, a stationary axle carried by said Stockyari abrasive roller rotatablymounted on said axle, a resilient frame disposed parallel to the straight surface line of the roller, means hingedly supporting one end of said frame adja-' cent one end of said roller, means detachably securing the other end of said frame adjacent the other end of saidroller, a blade holder mounted on said' frame and reciprocable along said frame and urged by -the resiliency of said frame toward the roller; and means including a crank rotatably mountedon said stock for rotating the roller and simultaneously reciprocating the blade holder.

6.;. A- safety razor blade sharpener, including a stocldprovided with a hand-grip, a stationary axle havingoneend fixedly attached to said stock and provided 'atits other end with a right angled terminal, an abrasive roller rotatably mounted upon said axle, a manually operated prime mover carriedby the stock, a cooperative means carried by the prime mover and the roller to rotate the roller from the-prime mover, a swinging frame attached to the right-angled terminal of the axle and movable to and from the stock and roller, cooperative'means carried by said frame and the stock' for locking the frame in operative position, a blade carriage mounted for reciprocating movement upon and carried by said frame, and means connecting the carriage to the prime mover so that the carriage is reciprocated simultaneousl I with the rotation of the roller.

7. A sharpener of the class described having a stock, an axle'extending forwardly therefrom, a

sharpening roller journaled on said axle, the forward end of said axle'extending upwardly and thence laterally, a resilient frame having substantially parallel portions journaled 'on the laterally extending part of the axle, means to secure the rear end of the frame to the top of the stock, a blade carrier reciprocable along said parallel portions and urged by said portions toward the roller, a prime mover journaled on one side of the stock, a gear driven by said prime mover to rotate said roller, and a connection from said prime mover to said carrier to reciprocate the carrier.

8. A sharpener of the character described, comprising a stock, a pair of parallel axles each having one of its ends secured to said stock, a member connecting the other ends of said axles and exmaintain the opposite edges of a blade carried thereby in engagement with the peripheries of said rollers, and means including a crank rotat able on said stock for rotating said rollers and reciprocating said blade carrier on said bars.

WILLIAM R. DAUGHTRY.

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