US936935A

US936935A - Razor-blade sharpener.

Info

Publication number: US936935A
Application number: US48558509A
Authority: US
Inventors: David M Perine
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-03-25
Filing date: 1909-03-25
Publication date: 1909-10-12
Anticipated expiration: 1926-10-12

Description

p. M. PERINB. RAZOR BLADE SHARPENER.

APPLIOATION FILED MAR.25, 1909.

936,935. Patented Oct. 12, 1909.

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'RAZOR BLADE SHARPBNER.

. APPLIOATION I'ILED M AR. 25, 1909. 936,935.

' Patented Oct. 12, 1909.

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I RAZOR BLADE SHARPENBR. I I APPLICATION FILED MAR.25, 1,909. I 936,935 H 4 Patented Oct. 12, 1909.

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R OR-B ADE SHALLBENEQUK l I Specification (if-Letters mum. Pate t d (whiz, 1909,

Application filed March 25,1909. SerialNo. 435,585.

My invention relates to devices for sharp-. .ening blades of razors, especially blades used in safety razors, and it consists in the combinations, constructions and arrangements herein described and claimed.-

An object of my invention is to provide a device by which the blade may be sharpened evenly, such result being obtalned by disposing the blade holder on a pivot centrally located between two sharpening disks.

A further object .of my invention is to provide an improved device for securely holding the blade to be sharpened.

A further object of my invention is to provide means for moving the blade to different parts of the stropping or sharpening member so as tocompensate for any .in-

equalities in the stropping surface or on the blade. y

A further object of my invention is to provide a rotatable stropinwhich there are no joints.

Other objects and advantages will appear in the following specification and the novel:

features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings in which similar reference characters indicate like parts in the several views, and in which Figure l is a side view of my improved blade sharpener showing the same attached to the wall. Fig. 2 is an end view of the same. Fig. 3 is a sectional View alongthe line 33 of Fig. 2. F 1g. 4 is a detail view in perspective of the blade .holder. 5

is a detail sectional view along a vertical plane through the axis or the disks. Fig. 6 is a detail view ofa portion of the blade .holding device, certain parts being in section.. Fig. Tie a sectionalong the line 7-.-'7 Fig. 8 is a detailjview of the .In carrying out my invention I providefa base'A which maybe of any. s n tablematerial suchas wood or metal and which canbe attached to. the wall 1 by screws. or .nails a.

cured-t t e. as flar t enp ta l .which forms =.-thebearing members for the shaft C, see Fig. 5. The shaft C is an en- 'larged central portion 0 whose ends form shoulders against which the metal disks or wheels D and D bear. These disks are securely fastened to the shaft by means. of the nuts E and E respectively which engage the threaded'portions cland'e' of'the shaft.

Secured on the inner surfaces of the circular disks D and-D are the strops F and F These strops may be made of any good abi'ading material such asleather and are prefera bly glued tothe inner surface of the disks as clearly shown in Fig.* In order .to insure the adhesion ofthe leather to the metal, I provide a series oftapered openings 7 f in each disk intowhichthe. glue runs... The

hardening of the glue provides a retaining medium similar to-a rivet'as will be clearly seen from an inspection of=-- Fig. Each of the disks B andB' is milled'on its periphery' as shown at (Z in Fig. 2, for the purpose hereinafter explained Disposed between thedisks D and-D is a tubularpost-G which issecui'ed tothebase A by means of the nut g as shown in'Fig. 3. This post is arranged to receive th rod K of the blade holder. v

H The construction of the blade holder is clearly shown in Figs l, 6 and 7, lt consists of the rod K before entioned which has a bent end 1; having flattened sides in order to provide a good finger hold. The rod- K is provided with a longitudinal sloth on its underside, see Fig. 6 anddiasa reduced'porgripping me1n- 'tion to which the spring her .70 is. securely fastendQ The, gripping .memberconsists of the two sidesfone of which is' provided with two openings and the other with two lugskfwhich are stamped from the metal and areadaptedftb'register' with the respective openings;in;i.the"opposite side. The normalpo'sitionifof th member 1: is shown in Fig.4 jawsare distended.

In order enclose the j'awsof the gripping.

member, I have provided the slide This is made of -a:single"pieceyof sprin'g inetal somewhat thicker than the grip h1g3 member ies. .frhe slide rea s ssqua theme. K in the manner shown 'i 7" the upper edge "a b nt tq a t izh' r' ale a narrow space In -as shown ,inL Figvft; ;The

ends of the slide. is adjacent the" member kflare flared Qutwardly to provide cainf rnemhers k? whichv are arranged to engage the sides of the gripping member 7c". Justbelow the cam surfaces 71: are two pieces 70 which are stamped from the metal of the slide 70 and are bent downwardly to form a handle for the slide as shown in the drawings. At the oppositeend of the slide is a tongue 70, see Fig. 6, which is bent uptable or other convenient place.

To insert ablade the rod K is withdrawn from thetube G and the blade is inserted between the jaws of the gripping member 7a. In case the razor blade should be of the Gillette type, the openings in the blade should register with the;lugs is. Now by merely resting the bent end is of the rod in the hollow between the thumb and fore-finger and pulling on the handle 7,1 with the fore-finger in the manner of a pistol grip, the slide is is moved toward the gripping member 70 and asthecam surfaces is come in contact with the slides of the latter they are pressed firmly upon the sides of the blade. slideis prevented from going past the gripping member by the engagement of the,

tongue 70 with the end of the slot is? when the slide is in the central position with re now in the'positiondshown in Fig. 7.

spect to the gripping member. The parts are The rod K is now inserted into the tube 9 and the stropping disks are turned by means of the handle H. As the stropping disks are rotat/ ed, the blade is turned from side to side so as to be brought into contact with them. As much or as little pressure may be applied as is necessary and the blade is turned to first engage one disk and then the other, thus obviating the necessity of removing the blade when sharpened on one side and replacing it to sharpen the other.. The stropping surfaces are continuous, there being no joints over which the blade has to pass and wh ch cause 'a-turning of the edge of the blade i. when it is dragged over the same. By mov- ;ing the rod inwardly and outwardly during the operation, the blade is brought into contact. with the various parts of the stropping disks and therev is no danger therefore of abrading the edge more in one place than in another. In' actualpractice a few turns of the disks will suiiice to sharpen a dull blade very quickly.

In order to prevent the, disks from turning backward and thereby cutting the stropping ,surface, I have provided the pawl P, see

Figs. 1 and 2 which is pivotally mounted on the arm S, secured to the base A. The coni struction of this pawl is shown in Fig. 8. It

consists merely of a piece of metal having an enlarged head" p. v The body portion 17 .01

The f the pawl extends through the opening 8 of the standard 5. while the head in contact with one of the disks such as D. .\s the disk is'turncd forwardly,- the pawl is pushed out of the way by the milled edge. but f a reverse motion is attempted, the pawl instantly prevents: the backward movement of the disk by itsengagement therewith. The weighted end P of the pawl overbalarces the heud and keeps the latter in constant cngagcnu-nt with the disk.

I am aware that other devices based upon the same general idea might be made. but l consider as my own all such modifications as invention.

I claim:

1. In a razor blade sharpener, a base, a pair of supports secured thereto, a shaft journaled in said supports, a pair of disks secured to said shaft, abrading material secured to each of said disks on its inner side, a cylinder disposed centrally between said disks, a slotted rod loosely supported in said cylinder for longitudinal and rotativc movement, a gripping member having spring jaws secured to said rod, a slide provided with spring jaws movably supported on said rod and having a tongue arranged to enter said slot to prevent the slide from turning, a handle-secured to said slide for forcing the jaws of said slide into engagement with the jaws of said gripping member thereby closing the latter, and means for rotating said disks.

Q. In a razor blade sharpener, a base, a pair of arms secured to said base, a shaft journaled on said arms, a pair of disks secured to said shaft, each of said disks having a stropping surface on their opposed sides, a hollow cylinder secured to said base and arranged toproject between said disks, a rod loosely mounted in said hollow cylinder, a pair of spring gripping aws secured to said rod, a slide mounted on said rod for longitudinal movement thereon havi lg an integral handle and a tongue arranged to engage said rod to prevent the rotation of the slide thereon and to limit its longitudinal movement, means for rotating said disks in one direction, and a pivoted pawl mounted on said base and arranged to engage the periphery of one of said disks to prevent rotation in a reverse direction.

3. In a razor blade sharpener, a base, arms secured thereto, a pair of disks rotatably mounted on said arms each of said disks having a stropping or abradin rsurface on their opposed sides, a hollow cylinder secured to said base between said abrading surfaces, a blade holder supported in said hollow cylinder and arranged for movement toward and away from the axis of said disks, said blade holder comprising a pair of spring jaws arranged to grip a razor blade, a slide adapted fairly fall within the spirit and scope of the tobe forced into engagement with said mounted on said base, a hollow cylinder 'se cured to said base between said abradin'g disks. a blade holder comprising a movable rod slidably supported in said cylinder and having a gripping member 'secured themto and a slide arranged to engage'said gripping member to close the latter, said blade holder being adapted to be turned at will so as to bring the blade in contact with the surface of either disk, means for rotating said disks in one direction and means for preventing the rotation of the disks in the reverse dire tion. i

In a razor blade sharpener, a base. 21

pair of opposed 'abrading disks rotatably mounted on said base, a hollow cylinder secured to said base between said abrading surfaces, a blade holder pivotally and slidably mounted in said hollow cylinder between the abrading faces of said disks, and

adapted to be turned at will so as to bring the blade in contact witheither of said disks. said blade holder being arranged to more toward and away from the axis of said disks.

, DAVID M. PERINE. Witnesses: 1 1

J. B. Amnrmsox, D.. E; Kon ER.