US1100398A - Sharpener for razor-blades and the like. - Google Patents

Description

'T. SAKATA'. SHARPENER FOR RAZOR BLADES AND THE LIKE. AF'PLIOATION FILED 1330.23, 1913.

1,1001398. Patented June 16,1914.

wzegses I flu/enter Tempo AMaza UNITED STATES PATENT OFFICE.

TERUO SAKATA, OF LOS ANGELES, CALIFORNIA,

SHARPENER FOR RAZOR-BLADES AND THE LIKE.

To all whom it may concern:

Be it known that I, TERUO SAKATA, a subject of the Emperor of Japan, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Sharpener for Razor-Blades and the like, of which the following is a specification.

This device relates to that class of in ventions adapted to more or less automatically hone and strop razor blades and the like.

in object of this invention is to effect honing and stropping of the blade with more precision than can be accomplished by hand and at the same time by movements that will approximate the movements generated in honing and stropping by hand, thus gaining the beneficial effects of the hand honing and str-opping and avoiding objectionable variations in. pressure and variation in the angle of application of the blade to the hone or strop incident to hand honing and stropping.

Another object is to effect the foregoing by simple construction so as to minimize cost of production of the device and so as to substantially prevent wear upon and disorganization of the various elements that make up the device.

Another object is to make provislon whereby the blade to be sharpened may be alternately stropped on opposite sides by reverse movements of the power axis so that the honing or stropping surface will be moved first in one direction and then in the opposite direction relative to the blade, thus substantially obtaining the same efiect as 18 obtained by hand honing and stropping.

Other objects and advantages may appear in the drawings filed herewith in connection with the subjoined detail description and it is noted that while the broader features of the invention are not limited to certain minor details, some of said minor details, per so, are of great importance.

The accompanying drawings illustrate the invention.

Figure 1 is a sectional elevation on line indicated by 00 Figs. 2 and 3 of a sharpener built in accordance with this invention, a blade in sharpening position is also shown. Fig. 2 is a longitudinal mid-section on line indicated by of, Figs. 1 and 4. Fig. 3 is an enlarged longitudinal section on line indicated by Fig. 1, portions being broken Specification of Letters Patent.

Application filed December 23, 1913.

Patented June 16, 1914.

Serial No. 808,513.

away to contract the view and the blade is indicated in broken lines. Fig. 4 is an eniarged fragmentary sectional elevation on line indicated by w, Figs. 2 and 3.

Arrows on the section lines of the various views indicate the direction of sight.

The article to be sharpened may be the blade 64 of a razor or the like, a razor being fragmentally shown in the drawings as of the ordinary jackknifing type and it is understood that the blade may be the blade of a safety razor or other implement. Means are provided to rotatably mount the blade a and for this purpose I provide a blade holder indicated at 1 and having resilient leaves 2, 3 together forming a clamp which is designed to embrace the sides of the blade and which may be constructed as shown in the drawings from a single piece of material bent around the back of the blade. One of the leaves as 2 is extended at both ends to form fastening shanks 4, 5 which are adjustably mounted by screws or bolts 6 and slots 7 to shouldered stub shafts 8, 9 which together form the axis of the blade holder 1. The stub shaft 9 is journaled in the head 10 at one end of a semi-cylindrical blade holder inclosing jacket I) that is provided at its other end with a head 11 having an internal annular flange 12, within which is journaled a cylindrical flanged head 13 of the blade holder 1 that may be integral with the stub shaft 8. The flanged head 13 is provided with a collar 14 fastened by screws 151 and extending over the inner face of the annular flange 12, said flange l2, flanged head 13 and collar 14 together holding the blade holder 1 against endwise movement in both directions.

The blade holder 1 is designed to hold the edge of the blade 64 against a sharpening surface 15, that may be of any desired substances and character, such as leather, stone or similar substances and said surface is preferably adapted for the sake of compactness to move in a cylindrical path, and for this purpose said surface forms the periphcry of a cylindrical drum indicated in general at 16 to which the sharpening surface may be fastened by any suitable means as glue, not shown, in case the sharpening surface is not integral with the body 17 of the drum. The drum 16 is rotatably mounted and for this purpose is provided with a sleeve 18 which in this instance is formed integral with the head 19 of the drum and which is j ournaled on an axis formed by a flanged stud 20 that is fastened by a nut 21 to the head 22 of a cylindrical barrel 23 surrounding and protecting the sharpening surface 15.

From the foregoing it is clear that there are two axes and that the drum 16 and its sharpening surface 15 can be turned on one of said axes in either direction and also that the blade holder 1 can be turned on the other axis in either direction so as to pre sent either side of the blade holder toward the drum and consequently so that either side of the blade a can be moved into engagement with the sharpening surface.

Means are provided whereby to automatically turn the blade (4 from side to side so as to present first One side and then the other side of the blade toward the sharpening surface 15 and for this purpose the two axes are connected by suitable gearing which will now be described.

The collar 14 is provided with and forms a spur gear wheel, there being provided for this purpose teeth 2 1 meshing with a spur gear pinion 25 which is mounted on a suitable bracket 26 that is fastened by a screw 27 and pin 28 to the head 22, and said pinion in turn meshes with an annular spur gear wheel 29 mounted on and adapted to turn with the sleeve excepting under certain conditions which will be stated hereinafter. It is now clear from the foregoing that when the drum 16 is turned by any suitable means, and in this instance by a handle 30 projecting from the drum head 19, the gearing will operate to turn the blade holder 1 in the same direction as the drum turns to automatically move the blade a toward and from the drum.

Provision is made whereby lost motion or relative movement may occur between the axes under certain conditions as when the blade a comes into engagement with the drum 16 and the construction relied upon to permit such lost motion constitutes pressure means to hold the blade against the drum with a desired amount and evenness of pres sure so as to effect sharpening of the blade edge, and for this purpose the spur gear wheel 29 is not fixed to the sleeve 18 but is chambered to form one member or disk 31 of a friction clutch, the other member of the friction clutch being formed by another disk 32 screw-threaded on or otherwise fixed to the sleeve 18, the friction between said disks being augmented by a washer 33 of leather or other suitable material interposed between said disks and said disks being held toward one another to cause a desirable amount of friction by suitable means as a coil spring 3 1 which surrounds the sleeve 18 and which has its opposite ends bearing against the drum head 19 and a collar 35 that seats and is pressed against the clutch disk 31 and that is held against turning relative to the sleeve 19 by means of a pin or screw 36 extending through said collar and into a spline way 37 in the sleeve. It is now clear that when the blade at has been turned in one direction to cause it to engage the drum 16, the drum may be further turned in said direction so as to cause relative movement and friction between the surface of the drum and the blade.

The blade holder inclosing jacket I) is mounted on the drum inclosing barrel 23 and may be suitably fastened thereto and, as shown in the drawings, is hinged at 38 and said jacket is provided with slots 39, through which the heads of latching buttons 40 may pass. Thejacket 7) and barrel 23 constitute a case well adapted to protect the working parts and the case may be provided with legs a1 as shown in the drawings. The shaft 8 and flanged head 13 are cut away or slotted to produce an orifice 4-2 through which the blade a may be inserted into the jacket Z2 and through which the shank c of the blade may extend when the blade has been so inserted as in Fig. 2.

The leaves 2, 3 are flared outward from one another to form lips 1-3 adjacent the orifice 12 so that the blade a may be readily inserted laterally between said leaves.

The proportions and relations of the various elements hereinbefore described may be varied to hold the blade a in such positions relative to the sharpening surface 15 as would prove the most eflicacious and it is here particularly noted that a high degree of sharpening eiiiciency is produced by constructing and organizing the various elements so as to hold the blade with its edge and one side of its back 03 in a plane e substantially tangential to the drum 16 and its sharpening surface, as in Fig. 1, thus obtaining the same effect as though the blade were moved along and laid flat against a sharpening surface extending in a plane produced by the ordinary hand hone and strop.

In practice, the blade a may be inserted into the jacket 6 through the orifice 4:2 and the handle 30 will be operated to turn the drum 16 in the direction, for instance, of the large feathered arrow thereon, Fig. 1, thus turning one side of the blade toward the drum and bringing the edge of the blade against the drum in the position shown in Figs. 1 and 4 and then the handle will be further operated in the direction of said arrow to turn the drum while the blade is held at rest against the drum by reason of slippage occurring between the clutch disks 31 32. The handle 30 will then be operated in the reverse direction to turn the blade (1 with its opposite side toward the drum 16 to again bring the edge of the blade against the drum and to cause movement of the drum relative to the blade as before, thus honing or stropping the blade first on one side and then on the other.

It is clear that drums having sharpening surfaces of different substances may be provided and that the construction and relation of the various elements makes provision whereby a drum having a sharpening surface of a honing substance such as stone, for instance, may be readily substituted for another drum having a sharpening surface of a stropping substance such as leather, for instance, so that the blades may be successively honed and stropped by one device.

I claim:

1. In combination, a barrel, a jacket mounted on the barrel, a shapening drum r0- tatably mounted in the barrel, a fixed head for one end of the jacket, a blade holder pivoted in the fixed head and having a head closing the other end of the jacket, said blade holder head having an orifice for insertion of the blade, and gearing operatably connecting the drum to the blade holder, said gearing including a clutch designed to allow relative turning of the drum and blade holder.

2. In combination, a case having an axis, an open ended sharpening drum on said axis, means to turn the drum, a friction disk fixed to said axis and extending into the open end of the drum, a second friction disk reciprocatably mounted on said axis inside of the drum, a spring on said axis inside of the drum to force the second disk toward the other disk, a movably mounted blade holder, and gearing connecting the blade holder to the second disk to move the blade holder toward the drum when the drum is turned.

3. In combination, an open ended barrel, a semi-cylindrical jacket mounted on the barrel, a cylindrical head at each end of said jacket, one of said acket heads having an internal annular flange, a blade holder surrounded by the jacket and provided at one end with a cylindrical flanged head that is ournaled in said annular flange and that is provided with an orifice through which a razor blade may be inserted, the other end of said blade holder being provided with a stub shaft journaled in the other of said jacket heads, a collar detachably fastened to said cylindrical flanged head and extending over the inner face of the annular flange, a stud fastened to the end of the barrel and extending therethrough, a sharpening drum rotatably .mounted on said stud, and means operatably connecting said collar to said drum.

4:. In combination, a rotatably mounted drum, stub shafts, blade holding leaves adjustably connected at their ends to said stub shafts so that said leaves can be moved toward and from the drum to accommodate blades of different widths.

In testimony whereof, I have hereunto set my hand at Los Angeles, California this 17th day of December 1913. I

TERUO SAKATA.

In presence of JAMES R. TOWNSEND, GEORGE H. HILES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patenta, Washington, D. 0.

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