US1909736A - Razor stropping device - Google Patents

Description

May 16. 1933- A. s. WARNE RAZOR STROPPING DEVICE Filed Dec. 3. 1951 sfsaf l INVENTOR ARTHUR STANLEY WARNE BY ATTORNEYS Patented May 16, 1933 UNITED STATES ARTHUR STANLEY WARNE, OF VANCOUVER, BRITISH COLUMBIA, GANADA' RAZOR STROPIINZG DEVICE Application filed December 3, 1931. Serial No. 578,795..

2 to the blade during each stroping stroke.

Further objects are to provide a hinged enclosure for the device which is simple in construction and capable of such displacement as to afford easy access to the working parts for the replacement of a strop when desired.

The invention consists of a strop roller, a blade holder and means associated with the strop roller for rocking the blade holder and for moving the blade holder transversely across the strop, as will be more fully described in the following specification and shown in the accompanying drawing, in which Fig. 1 is a longitudinal sectional view of the invention. V

Fig. 2 is a transverse sectional view of the invention taken on the line 2-2 of Figure 1 showing the enclosure in open position.

i Fig. 3 is a transverse sectional-view of the invention taken on the line 33 of Figure 1 showing the enclosurein locked position.

Fig. 4: is-an elevational view of the razor blade spindle.

Fig. 5 is a detail view of a rocking arm member.

Fig. 6 is a detail view of the cam frictionally supporting the rocking arm.

Fig. 7 is an end view of the invention.

In the drawing like characters of reference indicate corresponding parts in each figure.

The numeral 1 indicates generally an inverted U-shaped frame haiu'ng a transverse member 2 and vertical supports 3 and 4. The frame is normally enclosed in a pair of half covers 5 of boxlike construction, which are hingedly connected to the supports as at 6; the lower side walls 7 of the half covers are outwardly curved to define between them a gap 8 through which the free ends of a strop 9 project. An indentation is formed in the upper side wallsv 10 of the half covers as at 11, see Figure 3, which is adapted to be engaged by'a pair of opposed latches 12 extending upwardly from a spring leaf 13 secured by any suitable means to the underside of the transverse member 2 of the frame 1. Pivotally secured to the spring leaf 13 is a swivel 14 having a bale 15 bywhich the stropping device is suspended from a suitable hook, not shown. I

The swivel 14 is provided with a shouldered neck 16 which is of such length as to r permit the swivel to be depressed and to impart a downward movement to the spring leaf 13 so as to disengage the latches 12 from the indentations 11 and permit the half covers to be opened. I v

Freely journalled between the supports 3 and 4 is a roller 17 which is adaptedto be rotated in opposite directions by the strop 9. At one end of this roller an enlargement 18 is provided which has a cam groove 19 preferably varying from Zero to eighty six and ninety four degrees from the axis of the roller. In this cam groove a rocking arm 20 is mounted; the arm consists of a pair of light spring plates 21, see Figures 5 and 6, each having a transverse slot 22 to accommodate the axis of the enlargement and a vertical slot 23 at its base. j V

Each plate istransversely concavo convex so that when a pair of them are placed together and set in position as shown in Figure 6, their side edges will frictionally engage thefaces of the cam groove 19, so that the initial rotation of the roller in either direction will impart a rocking motion to the arm.

Rockingly mounted between the supports 3 and 4 is a blade carrier 24 consisting of side plates 25 having their medial portions in the form of a split tube 26, one end of which passes through the support/i and forms a journal for the end of the carrier. A narrow portion of the side plates adjoining the tubular portion also extends as at 27 through a slot 28 in the support 4 and half covers 5, which is provided with an enlarged portion 29, the borders of said portion acting as stops for limiting the rocking movement of the blade carrier 24. At the inner end of the blade carrier is an upstanding lug having a tapering slot 31 formed in its upper edge. The base of the slot is the same width as the rocking arm and its sides are cut to at least the same angle as the maximum angle of the cam groove 19, see- Figure 1, so that the slot 23 of the rocking arm may engage the blade carrier to rock it to the limit of its stroke.

The numeral 32 indicates a spindle having an elongated projection 33 which-is adapted to pass through the central aperture 34 of a razor blade to hold it against'endwise movement thereon. The outer end of the spindle is fitted with a knurled knob 35 having at its inner end a peripheral. groove 36 shownin dotted line in Figure/l, which is adapted to receivethe projecting end 27 of the blade carrier 24: and prevent its side-portions from spreading and binding in the sidesupport 4. The device is enclosed in half covers to facilitate the insertion of the strop and its being passed .over the roller 17.

To use the device, the spindle 32 is withdrawn, a razor blade placed thereon and is thenplaced into the blade carrier 24 and the knob 35pressed inwardly to the limit of its stroke. The ends of the strop are gripped in both hands and is'reciprocated by pulling on one end and slackeningthe other; Obviously the engagement of the strop with the roller 17 will cause said roller to rotate. The initial rotation in one direction, through the frictional gripbetween the enlargement 18 and the rocking arm 19, will impart a rocking movement to the arm and acorresponding rocking-movement tothe blade carrier 24 and the blade therein to dispose the latter in such a position that one side of its opposite edges will be brought into contact with the strop for sharpening. The continued movement ofthe strop in one direction will impart continued rotation to the roller, but as the arm cannot rock further, slippage takes place between the arm 19 and the enlargement and the length of the'strop it will obviously I follow that the blade will be reciprocated many times to each reciprocation of the strop, and that the edges of the blade will be stroked at every angle, from the maximum (approximating four degrees) on one side of the ver- 1. In a razor blade stropper having a carrier in which a blade is adapted to be held, a roller journalled parallel to the carrier over which a strop is adapted to be drawn, an enlargement on said roller having a face cam,

an arm frictionally engaging said cam and operatively connected to the carrier whereby the initial rotation of the roller imparts a predetermined rocking movement to the carrier and the continuing rotation of the roller imparts a reciprocatory endwise movement a stropping element adapted to alternately engage opposite sides of the cutting edge of the blade, a'rotatable shaft having a peripheral groove forming a cam, a forked arm rockingly mounted in said groove and having its free end in engagement with the I blade carrier whereby rotation of the shaft imparts endwise reciprocation to said carrier.

4. In a razor blade stropper having a carrier in which a blade is adapted to be held, a roller ournalled parallel to the carrier over which a strop is adapted to be drawn, said roller having a peripheral groove forming a cam, a forked arm rockingly mounted in said groove and having its free end in engagement with the blade carrier whereby the rotation of the roller imparts endwise reciprocation to said carrier, said forked arm comprising a pair of resilient plates curved transversely of their length and having their forked ends so disposed within the groove'as to cause their outer edges to engage the marginal edges of said groove under spring tension of the plates.

Dated at Vancouver, B. 6., this 29th day tic-al to the maximum on the other side, many times to each reciprocation of the strop, so that all microscopic irregularities on the edges of the blade will be worn smooth and keen cutting edges produced.

7 What Iclaim as my invention is:

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