US1451789A - Stropping machine - Google Patents

Description

Apr. 117, 11923.

C. E. SMITH S'TROPPING MACHINE Filed July 1919 2- Sheets-Sheet l /are/zie Z 502/777,

Apr 17, 1923.

C. E. SMITH STROPPING MACHINE 2 Sheets-Sheet 2 Filed July 5 Patented Apr. 1'7, 1923.

.PTET FFICE.

CLARENCE E. SMITH, 0F IEOBIA, ILLINOIS.

STROPPING MACHINE.

Application filed July 3, 1919. Serial No. 308,416.

To all whom it may concern:

Be it known that I, CLARENCE E. SMITH, citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Stropping Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to razor strops. An object of the invention is to furnish a strop of the automatic type for strop-ping safety razor blades, though the so-called ordinary razor may be likewise accommodated.

Another object of the invention is to provide a strop that can be used to impart a diagonal stropping to the razor blade.

Still another and important object is to furnish a boX or container for holding the stropping mechanism, into which to introduce the blade to be sharpened.

Another object is to construct a stropping device in a very simple and compact form that can be operated with ease and sureness.

Besides these objects the invention consists in a novel arrangement of parts, as will be pointed out herein, aided by the acconr panying drawings forming part of this application, and which show the preferred embodiment of my invention, although changes may be made therein as may be found desirable without departing from the spirit and intent of said invention.

Figure 1 shows my invention in perspective.

Figure 2 is a plan of the same, parts of which are broken away to show interior structures.

Figure 3 is a longitudinal sectional elevation thereof.

Figure 4 is a view similar to Figure 3, showing certain parts of that figure much enlarged.

Figure 5 is a cross sectional elevation of the invention also much enlarged.

Figure 6 shows in perspective a part of the containing case. or box and some of the interior parts, together with a razor blade and a carrier therefor.

Figure 7 is a side elevation of a bladecarrier.

Figure 8 is a plan, in detail, of certain operating parts.

Figure 8' is a side elevation of part of the same.

Figure 9 is a longitudinal sectional elevation of a part of the invention, much enlarged.

Figure 10 shows in perspective a tilting or rocking blade-support.

In the figures, 1 represents a long, thin. narrow case of any desired material, preferably metal, which may consist of separable parts or otherwise constructed.

The opposite narrow walls, or what may be termed the side walls, of the case are each provided at each end with a grooved portion 2 lying opposite one another for receiving the trunnions of a pair of rollers 3, the grooves being preferably closed at their outermost ends and open at their opposite or inner ends.

A frame comprising a forked-member 4 engages the trunnions of each roller and said frames are connected slidably by means of a reach 5 extending from one of them into a socket in the other, as clearly shown in Figure 8.

A belt 7 of stropping material, such as leather, is trained over the rollers and an expanding spring 8 interposed between part of the reach 5 and the loop 6 serves to keep the belt drawn tightly or at least to take up all slack and preventing sagging thereof. Extending longitudinally of one of the broad sides of the case, or what may be termed its top, is a slot 9. Beneath the said top, consequently beneath the slot, is one stretch of belt to which a finger-piece 10 is attached, which slides within the slot, preferably having oppositely disposed portions to slide upon the outer surface of the top,

as shown in Figure 5.

11 indicates a U-shaped member pivoted to the opposite broad side or bottom of the case at 12, Figures 4 and 5. Mounted in the end portions of said member 11 is a support 13 for a blade to be sharpened. This support consists of a tube split in half for the greater part of its length. It is supported at its ends in said yoke and adapted to rock therein, and extends between the stretches of the belt as shown. 14: is a carrier for the blade to be sharpened, which is adapted to enter the support 13 in a snug taper fit. Said carrier comprises, for example, two parts semicircular in cross section pivoted together near one of their ends, being constructed after the manner of a pair of pincers whereby they will clamp a blade between them, and one of them may have a pair of studs 14 extending in the direction of the other to enter the usual perforations found in one or two of the common types of razor blade. In Figures 6 and 7 the blade is shown clamped in the carrier, and in Figure 10 the carrier is shown inserted in the rocking support, the blade being shown in two extreme positions in broken lines as it rocks with said carrier. and support.

One of the ends of the U-shaped member is slotted at 14 to receive the blade endwise, and the place of separation of the tubular support is adapted to register therewith, as in Figure 6. The blade may be inserted to the stropping position through the slot when clamped by the carrier, the taper of the latter resulting in a firm grip on the blade as said carrier is pushed home. It is to be observed that the case 1 is furnished with an opening 14 clearly shown in Figure 1, to admit the blade and carrier.

Depending from the support 13 is a bail 15 provided with a slot 16 through which extends a vertically disposed pin 17 extending from the reach 5, most clearly illustrated in Figure 11. The pin is allowed free play in said slot, being adapted to rock the support, as will be explained in the operation.

18 indicates four pressure receiving plates extending between the ends of the member 11 lying parallel to the axis of said support 13, each in position to receive pressure of the blade upon it with the stretches of the belt interposed. Figure 4.

Particular attention is directed to the said belt or stropping element 7. As a convenient manner of constructing it so as to keep its stretches snugly drawn and in order that it'can be readily operated, there is attached within the belt a stretch of belt 7 separate from the main portion. This is skived at its ends, but one of which ends is shown, Figure 9, so that said ends will pass over the rollers with perfect freedom of movement. This stretch 7 answers as one of the stropping portions and lies between the support 13 and the upper pair of pressure receiving plates 18, Figure 4:. being adapted to travel in cont ct with the latter, while the other or lower stretch lies between said support and the lower pair of plates and travels upon said plates as seen in said Figure 4. That portion of the main belt to which the fingerpiece 10 is attached is free to flex as the latter moves in a straight line upon the easing 1 and imparts movement to the entire belt and is the sole operating means for the stropping operation except as to the diagonal stroke, as will now be explained.

The frames 4: being held elastically apart by the spring 8 maintain the belt at a snug stretch and the grooves of the portions 2 are of such length that the rollers and the frames as a whole may have a slight longitudinal movement with respect to the easing 1, the closed ends of the grooves limiting this movement in either direction, although other limiting means may be used if de sired.

hen the finger-piece 10 is moved, the slight longitudinal movement is the first action to take place, resulting in rocking the support 13 due to the connection of the reach 5 with the bail 16. This rocking movement moves the two edges of the blade against the opposite belt stretches. which in lying against the plates 18 will take the.

pressure of said blade, the edges being thus held in intimate contact with the stropping. surfaces. In the continuing movement of the finger-piece the belt is carried along away from the edges in the proper direction. until the finger-piece reaches the end of its slot 9. whereupon by reversing the movement the frames will be shifted in the other direction, reversing the position of the blade. the belt again traversing the edges at their opposite sides. I

This may be done as fast or slow as de= sired. the action being entirely positive.

Naturally there is less resistance to the movement of the rollers along the grooves in the portions 2 than that of turning with. the belt. and rocking of the blade is assured before the belt begins to travel, so that the greatest possible stropping surface is kept in contact with the bladeedges in said travel.

The finger grasping portions of the carrier 1 1 extend from the casing 1 so that a finger of the hand holding the device may be placed upon it. Since the member 11 is pivoted. to the casing wall as explained, it may be swung backward and forward by the finger. thus swinging the blade so that its edges will lie at an angle to the direction of belt travel and receive the desired diagonal stroke as the fingers of the other hand move the finger-piece 10 back and forth.

In order that the swinging motion may be imparted, the longitudinallyextending slot 16, before mentioned, is provided in the ball 15. This permits free action and said slot 1s sufficiently wide to permit the rock ng movement without binding of the engaging parts.

The entire mechanism is enclosed in a closed casing quite small in size so that it may be carried with the usual compact shaving outfit, and in being thus enclosed the strop and the parts carrying it are protected from dust.

The member 11 may swing as far as necessary, and any means may be used to limit that swing, the upright end portions being sufficiently spaced from the edges of the belt for this purpose. Said ends must, of course. also be spaced from the walls of the casing 1 to admit of the required swlng, but this is evident to the practical person.

What I claim is-:-

1. A stropping machine including in its construction a support, a member mounted on the same, a rocking part mounted iii said member adapted for carryin a blade to be sharpened, a frame operativel y engaging the rocking part capable of movement in opposite directions in a given plane adapted to rock said part on its axis, an endless bandlike stropping member carried by the frame adapted for a reciprocating movement with respect thereto and in each reversal of its movement causing the movement of the frame with respect to the support for rocking the said rocking part, and a finger-piece connected with the stropping member for reciprocating the same and adapted for movement in a single given plane.

2. A stropping machine including in its construction a support, a member mounted on the same, a rocking part, including a bail, mounted in said member adapted for carrying a razor blade to be sharpened, a frame operatively engaging the rocking part capable of movement in opposite directions in a given plane adapted to rock said part on its axis, a stropping belt carried by and adapted for a reciprocating movement with respect to the frame and in the reversal of its direction of travel causing the movement of said frame with respect to the first described member whereby to rock said rocking part, and a pressure receiving plate lying adjacent the outer side of each stretch of the belt opposite the point of contact of the blade therewith.

3. A stropping device including in its construction a support, a member mounted on the same, a rocking part mounted in said member adapted for carrying a razor blade, a frame of two parts operatively engaging the rocking part capable of movement in opposite directions in a given plane adapted to rock said part on its axis, a roller mounted at opposite ends of the frame, a stropping belt trained over the rollers and a spring interposed between the parts of theframe adapted for maintaining tension on the belt.

4:. A stropping machine including in its construction a support, a member mounted on the same, a rocking part mounted in said member adapted for carrying a razor blade, a frame of two parts slidably related operatively engaging the rocking part and capable of movement as a whole in opposite directions in a plane perpendicular to the axis of the rocking part, a roller at opposite ends of the frame, a stropping belt trained over the rollers with their stretches lying at opposite sides of said rocking part, a spring interposed between the parts of the frame constantly maintaining the belt under tension, and a manually operated part attached to the belt adapted for reciprocating the belt and simultaneously moving the frame in the initial movement of said belt.

5. A stropping machine including in its construction a support, a member pivoted on the same adapted to be swung in a single given plane, a rocking blade-carrying part journaled in said member, its axis of movement being perpendicular to the pivot of the member, a stropping belt and a mounting therefor, said belt adapted for movement in a plane perpendicular to the said pivot of the member.

(S. A stropping machine including in its construction a closed casing, a member pivotally mounted therein, a rocking part mounted in the member capable of holding a razor-blade, a frame operatively connected to the same and adapted for movement to rock the latter, a stropping part mounted on the frame adapted for movement perpendicularly to the axis of movement of the part, and means extending outside the casing by which to swing said member.

7. A stropping machine including in its construction a Hat containing case, a rocking blade-carrying part, a support for the latter in said case, a frame adapted to reciprocate, the same being operatively connected to the blade-carrying part for rocking the same, a stropping belt, a roller mounted in each end of the frame for carrying the belt, and a finger-piece attached to the belt for operating the same, there being a slot in the wall of the case through which said finger-piece extends.

In testimony whereof I afiix my signature in presence of two witnesses.

CLARENCE E. SMITH.

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