US1017325A - Safety-razor-stropping device. - Google Patents

Description

A L. 1). SAXTON. SAFETY RAZOR STROPIING DEVICE. APPLIOAIION FILED JAILZ'T, 1911.

Patented Feb. 13,1912.

WITNESSES II /VENT I? GA/ I M y ATTORNEY LIONEL D. SAXTON', OF NEW YORK, N. Y.

SAFETY-RAZOR-STROPPING DEVICE.

, Specification of Letters Patent.

Patented Feb. 13, 1912.

Application filed January 27, 1911. Serial No. 605,078.

To all whom 'it may concern:

Be it known that I, LIONEL D. SAXTON, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Safety- Razor-Stropping Devices, of which the following is a specification.

The object of this invention is to provide a stropping device of this character which will withstand the severe wear and tear to which such devices are subjected, and which will present the blade forcibly to the strop when moving in either direction, and in which the parts are readily separable and easily assembled.

The principal elements of this stropping device are a sliding carriage B adapted to move back and forth on a strap strop, a holding frame A for said carriage adapted to slide back and forth thereon and an oscillating blade holder G pivoted to said carriage and adapted to swing into active position at either end thereof.

Figure 1 is a side elevation of the device. Fig. 2 is an end view. Fig. 3 is a longitudinal vertical sectional view. Fig. 4 is a plan view of the stropper. Fig. 5 is a view of the strop holding spring. Fig. 6 is an edge view of same inverted. Fig. 7 is a View of the blade holder unlocked for the reception of the blade.

The holding frame A comprises a base or bottom 12, a dependent handle 13 secured therein and sidewalls 14 14 preferably integral with the base. The base 12 is preferably in the form of a crosspiece connecting the sidewalls at or about the center of their length. The handle 13 is preferably detachably connected with the base 12, any suitable means being employed. In the form shown the handle 13 is provided with a stem 16 which projects through a perforation in the base and a cotter pin 17 is passed through the stem for holding the handle in place. The side walls 14 14 are provided beyond the bottom 12 on opposite sides thereof with inward flanges 11 in the same plane with said bottom and preferably integral therewith. These flanges serve as tracks or ways on which the carriage slides, and they are provided near opposite ends with upturned fingers 20. The side walls 14 14 are offset and their upper parts stand outward beyond the vertical plane of the lower parts. Each sidewall is provided with two vertical slots 15 15 open at'the upper edge thereof.

The carriage B is adapted to fit between the lower portions of the sidewalls of the holding frame A in such manner that the frame and carriage are freely slidable one on the other, and spaces are left between the upper opposite portions of said walls and the carriage. The carriage comprises two sides 18 18, two crossrods 22 22 connecting said sides at their ends and a crossrod 23 connecting said sides at or near the center of their length and in a plane below said crossrods. The sides are provided at their lower edges with inward flanges 19 19, which ride on the flanges 11 11 which constitute the track of the holding frame. One or both of these carriage flanges is provided at 0pposite ends of the carriage with inward lugs 21 21 which abut against the upturned fingers 20 20 on the flanges of the holding frame, said lugs and fingers serving as stops to arrest the relative movements of the carriage and holding frame on completion of a stroke in either direction. An elevated transverse rod or shaft 26 is supported at its opposite ends centrally of the carriage in the side plates thereof above the central crossrod .23 and also in a plane above the end crossrods 22 22. This elevated crossrod .26 pro jects outward beyond said sideplates forming exterior trunnions on which the frame of the blade holder turns, while the part of said rod which spans the space between said side plates serves as a pintle for the independently hinged jaw of the blade clamp hereinafter described. 4

A strop 25 constructed of leather or other suitable material in the usual form of a strap strop is passed between the walls of the carriage B underneath and in contact with the crossrods 22 22 and above the central crossrod 23. A single plate spring 24 is disposed in the carriage for the purpose of clamping said strop 25 against the end crossrods 22 22 and also for supporting it firmly for action of the edge of the blade to be sharpened as hereinafter described. This plate spring is preferably rectangular or approximately so and may be struck out of sheet steel or other suitable material. A rib 36 struck up from the under side of the sheet forms a semi-socket which engages the central crossbar 23 on which the spring is supported. The plate 24 extends outward in opposite directions from opposite sides of the rib 36 toward or to the ends of the carriage and comprises upwardly curved spring portions 37 37 and flatsurfaces 38 38 the latter being preferably pro vicled at their outer edges with downturned lips 39 39. The flat surfaces 38 38 form contact with the strop at points inside the crossrods 22 22 and opposite the bearing points of the blade to be sharpened, and the downturned lips 39 39 facilitate the introduction of the strop into the carriage. The plate spring may have slots as shown to increase its elasticity.

The oscillating blade holder C is pivotally mounted on the carriage B. In the form shown this blade holder comprises a frame composed of side plates 27 27 and a connecting crossplate 28 preferably integral therewith. These side plates are disposed between the sidewalls of the holding frame A and the side plates of the carriage B and are pivoted on the outer ends or trunnions of the rod 26 of the carriage. Each of the side plates comprises a triangular base and a straight extension tongue at the apex thereof. These side plates are provided with lateral studs 35 35 disposed in triangular relation with the pivot 26 of the blade holder, or in other words on opposite sides of the center of oscillation of said plates in a plane below said pivot 26 when the blade holder is in its intermediate upright position, and apart from each other a distance corresponding with the space between the open slots 15 15 of the sidewalls of the holding frame. The cross plate 28 is united with the opposite extension tongues at corresponding opposite edges thereof and other edges of said tongues are provided with inward lugs 33 33. The crossplate 28 is provided with a central tubular barrel 28 through which the rod 26 passes. The cross plate 29 is hinged by barrels 29 29 or otherwise to the rod 26 and shuts within the sideplates 27 27 against the crossplate 28. The crossplates 28 and 29, hinged independently of each other on the rod 26, constitute the jaws of a blade clamp for holding a blade 30 to be sharpened. The plate or jaw 29 is provided at its opposite ends with notches 4:0 40 which permit the ears 33 33 of the plate or jaw 28 to pass in opening or closing the clamp. The clamp is held in closed position by a bow spring 32 which is swiveled at its center to the jaw 29 and engages at its ends underneath the lugs 33 33 of the frame with which the jaw 28 is united. The ends of the spring 32 are preferably provided with roughened serrated or pebbled surfaces 34 34 to create sufiicient friction to prevent the spring from working loose while the strop is in operation. A flat blade may be held in the clamp and owing to the recesses 31 in both edges the clamp is also adapted to hold the type of razor blade which has an enlarged back.

In the use of this stropping device, any suitable strap strop as 25 is passed through the carriage B and clamped with considerable pressure between the opposite ends of the bow spring 24 and the end crossbars 22 22. The jaws 28 and 29 of the clamp of the oscillating blade holder C are swung open and a blade as 30 is placed in proper position between them for sharpening. The jaws are then closed and fastened in closed position by pressing the bow spring 32 and swinging it under the lugs 33 The strap strop 25 is fastened at one end to any suitable support and grasped at the opposite end by a hand of the operator, the handle 13 of the holding frame A being grasped in the other hand of the operator. Assuming that the parts are in the position shown in Fig. 1 and that the stropping device is to be moved toward the left on the strop 25 (see Fig. 3), a pull of said device toward the left (or of the strop toward the right) will slide the holding frame A to the limit of its movement at the right of said carriage as illustrated in Fig. 3. During such relative movement of the holding frame and carriage the blade holder is swung over toward the right until the edge of the blade 30 to be sharpened comes in contact with the strop 25 at a point opposite the flat surface 38 of the clamping spring 2 l. The first half of said swing of the blade holder is imparted by the stud 35 at the left of the point of oscillation of said blade holder which is then in engagement with the open slot 15 of the holding frame and the last half of said swing is imparted by the stud 35 at the right of said point of oscillation which comes into engagement with the open slot 15 of said holding frame before the stud 35 escapes from the slot 15. The friction of the strop holds the carriage stationary on the strop until the holding frame reaches the limit of its movement on said carriage and then both carriage and frame move together and the blade to be sharpened is dragged along the strop. After a full stroke of the stropping device toward the left, the motion is reversed. In the initial part of the stroke toward the right, the holding frame A slides on the carriage B into position at the right of said carriage and during this relative shifting of the frame and carriage, the blade holder 0 is swung to the left of its center of oscillation, the stud 35 passing out at the top of the open slot 15 and the stud 35 passing into the open top of the slot 15. This move ment brings the opposite side of the blade to be sharpened in contact with the strop 25 at a point opposite the flat surface 38 of the spring 24 and the device is then moved along said strop in a stroke toward the right whereby the edge of said blade is sharpened on its opposite side. The open slots disposed wide apart and the studs also disposed wide apart and adapted to engage said slots in alternation impart a leverage which quickly throws the blade holder from one position to the other and operates to hold the edge of the blade with much force against the strop.

The device thus constructed is simple, compact, strong and durable and may be taken apart and packed within a very small space, and the parts may be readily assembled when desired for use.

What I claim as new and desire to secure by Letters Patent is:

1. In a stropping device, the combination of a carriage provided with means for engaging a strap strop, a holding frame for said carriage adapted to slide back and forth thereon and provided with sidewalls having slots open at the top thereof, an oscillating blade holder pivoted on said carriage above said sidewalls and provided with lateral studs disposed in triangular relation with the pivot of said blade holder and adapted to swing into and out of engagement with said slots in alternation in reversal of the device on the strop, the entry of one stud into its slot preceding the release of other stud from its slot.

2. In a stropping device, the combina: tion of a carriage provided with means for engaging a strap strop adapted to slide therethrough and with trunnions rojecting beyond its sidewalls, a holding rame for said carriage adapted to slide back and forth thereon and provided with sidewalls offset in their upper. parts and having slots open at the top thereof, and an oscillating blade holder pivoted on said trunnions and having its side plates disposed between the sides of said carriage and the offset portions of the sidewalls of said holding frame, said side plates having lateral studs disposed on' opposite sides in triangular relation with the pivot of said blade, said studs being adapted to swing into and out of engagement with said slots in alternation in reversing the movement on the strop, the entry of one of said studs into its slot preceding the'release of the other stud from its slot.

3. In a stropping device, the combination of a carriage, a holding frame for said carriage adapted to slide back and forth thereon, and an oscillating blade-holder pivoted on said carriage, said carriage being provided with means for engaging a strap strop adapted to slide therethrough, said means consisting of end crossbars, a central crossbar and a bow-shaped spring adapted to hold said strop against said crossbars, said spring having a struck up socket engaging said central crossbar and flat surfaces adapted to rest against said strop at points opposite the points of engagement of the blade to be sharpened.

In witness whereof, I have hereunto set my hand this 30th day of November, 1910. LIONEL D. SAXTON. Witnesses:

ANTHONY F. ARGOME, AGNES L. CLUNE.

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

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