US1436740A - Razor-blade stropper - Google Patents

Description

H. WESSON.

RAZOR BLADE STROPPER.

APPLICATION FILED IuLY 29,1920.

19436974@ Patented NIW. 259 mgl Patented Non'. 2S, i922.

HAROLD VESSON, 0E SPRINGFIELD, MASSACHUSETTS.

RAZOR-BLADE STROE'PER.

application led .Tilly 29, 1926. Serial No. 399,828.

To @ZZ 1z0/710m t may concern.'

Be it lrnown that l, HAROLD lvlfnssonr, a citizen of the United States of America, residing in Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful vlmprovements in Razor-Blade Stroppers, of which the following is a specification.

This invention provides a convenient handle by which to clamp and hold the blade of a safety razor while stropping it. lhe invention provides a very simple, convenient and eective construction for this purpose.

rThe preferred embodiment of the invention is shown in the accompanying drawings, wherein7 v v Figure l is a side View of the holder;

Fig. 2 is a back edge view thereof;

Fig. 3 is a front edge view thereof;

Fig. 4 is a face view with the parts of the holder opened.

Fig. 5 is a transverse section on the line 5-5 in Fig. l;

Fig. Gis an enlarged transverse section on the line 6 6 in Fig. l; l

Fig. 7 is a section inthe same plane as Fig. (ibut with the members open;

Fig. V8 is an enlarged section on the line 8-8 in Fig. 1 showing the holder in the act of stropping the blade.

The new stropper comprises a blade holder consisting of two members `pivoted together at one end, the portion nearest such pivot serving as a clamp for the razor blade while the remote portion serves asha handle by which to grasp the holder while strop-y ping the blade. rilhe novel features will be made apparent as the description proceeds.

ln the drawings A and A are the'two members of the holder7 being united at one end by a pivot B. The respective members are formed with blade holding or clamping portions C and C respectively, between which is clamped the blade D to be stropped. The outer portions of the respective members lettered F and E respectively constitute the handle of the holder. yThe handle portion isv reduced in width to be conveniently grasped by the hand and easily turn-ed4 while stropping. To give a rmer hold the face of each handle portion on one side is roughened by grooving or otherwise,` as` shown by F in Fig. 3. The clamping por` tions C and C are of sufficient width to cover and guard one edge of the blade while leaving the other edge to be sharpened proder H to serve as a guide in stropping and 'having a rounded back portion l on which `the holder may be turnedat the end of each stroke as in the stropping of an yordinary razor. On their inner faces the clamping members C. C are :dat for the greater portion of their width so as to afford a firm clamping seat for the opposite faces of the flat razor blade. '.lhat portion of the inner faces adjacent the protruding edge of the blade is bevelled `outwardly as shown at .l

in Figs. 4 and 8 and also at Jl. in Fig. 6. The purpose of this bevelling is to permit a limited flexure of the blade when it receives the pressure against the strop as indicated in Fig. '8 where the strop is lettered K. This inner bevelling has been found practically essential to the successful stropping of thin safety razor blades. rllhe shape of the rounded bevel is such as to support the blade to a varying extent under varying fleXure, an eXtreme flexure under the maximum stropping pressure bringing the blade into supporting contact with nearlyT the eX- treme edge of the bevelled portion, while a less flexure giving it a line of support more or less removed backwardly from such edge.

The razor' blade located and held firmly in position between the clamping members by means of pins li la, projecting from one clamping member and entering the conventional holes in the blade and being prefer ably long enough to enter slightly beyond the face of the other member which for this purpose is formed with shallow grooves M, shown in dotted lines in Fig. 4 and one of them being shown in section in Fig. 8. The pins L are conveniently made as separate pieces and riveted into holes in the clamping member C as shown in the cross section Fig. 8.

It is desirable for convenient insertion of the blades and for their tight engagement 'during stropping `that the clamping mem bers should separate somewhat in turning open to or beyond the position shown in' Fig. 4 and that they should be drawn or forced tightly together after the blade is inserted concave external faces, the thicker portions at the back being adjacent tothe covered blade edge and being the portion of greatest projection, and the thinner portions being at the edge from which the blade protrudes, the thicker and thinner portions adapted to bear against the strop, and the handle portions materially narrower than the clamping portions to enable the handle to be readily held and turned during stropping.

In Witness whereof, I have hereunto signed my name.

HAROLD W'iESSON.

Images