US1934139A

US1934139A - Means for sharpening safety razor blades

Info

Publication number: US1934139A
Application number: US483059A
Authority: US
Inventors: Pavitt Edwin George
Original assignee: NEWTON SALES Co Ltd
Current assignee: NEWTON SALES Co Ltd
Priority date: 1929-09-25
Filing date: 1930-09-19
Publication date: 1933-11-07
Anticipated expiration: 1950-11-07

Description

Nov. 7, 1933. E. G. PAVlTT 1,934,139

MEANS FOR SHARPENING SAFETY RAZOR BLADES Filed Sept. 19, 1930 2 Sheets-Sheet l Nov. 7, 1933. E. G. PAVITT 1,934,139

MEANS FOR SHARPENING SAFETY RAZOR BLADES Filed Sept. 19, 1930 2 Sheets-Sheet 2 Patented Nov. 7,v 1933 PATENT. OFFICE MEANS FOR SHARPENIN G SAFETY RAZOR BLADES Edwin George Pavitt, London, England, assignor' to Newton Sales Company Limited, London,

England Application September 19, 1930, Serial No. 483,059, and in Great Britain September 25,-

1 Claim.

This invention relates to means for ening safety razor blades.

The invention consists broadly in the provision of a strop or hone having a grooved surface and me s for ensuring that the blade during the opaation of strcpping will automatically adopt the correct angle in relation to the grooved surface of the strop or hone. The strop or hone may have abrading l rial applied to its surface so as to fill the grooves. A further feature of the invention is the provision of a clip or holder by means of which the blades can be held so as to adopt automatically the correct angle in relation to the strop or hone.

In order that the invention may be more clearly understood one example of the invention will now be described with reference to the accompanying drawings, wherein:

Figures 1, 2 and 3 are plan views of the strop or hone showing different forms of the grooved surface;

Figure 4 is a side elevation of a modified form of strop or hone;

25 Figure 5 is a side elevation of the preferred form of clip or holder with a razor blade in position for sharpening;

Figure 6 is a perspective view of the strop or hone as shown in Figure 4 in operation; and

Figure '7 is a perspective view of a further form of holder with a blade in position for sharpening.

sharp- In these drawings the strop or hone, which may be made of a suitable material of a hard 5 nature but preferably one which can be mould-- ed, such as a synthetic resin, has a grooved surface 2 secured to a base or back plate 3 which is provided with a hole 4 or like device for hanging the strop or hone when not in use. The grooved surface of the plate 2 may be treated with any suitable abrading material, such for example as carborundum paste, The grooves formed on the plate 2 may be of any convenient form but the most effective form of grooves have been found to be of curved, herringbone, or serpentine design, as shown in Figures 1, 2 and 3, and arranged in such a manner that a razor blade when being sharpened will pass across them obliquely.

Figures 4 and 6 of the drawings show a modified form of strop or hone made .in accordance with the present invention and curved to a suitable radius of curvature so that when a razor blade 7 is laid upon the grooved surface 2 of the strop or hone'and pressure is applied, the edges of the blade 7 will automatically adopt the proper angle to the grooved surface 2 of the strop or hone for sharpening, thus avoiding the necessity for a holder for the blade.

When a strop or bone as shown in Figures 1, 2 and 3 is employed, a holder for the blades is provided which may be in the form of a clip or holder (seejigure 5) having gripping jaws 5 and 6 at one end adapted to be opened to enable the blade 7 to be inserted, by pinching together or compressing the two arms 8 and 9, out the arms 8 and 9 are disposed at such an angle that when the clip is laid upon the grooved surface 2 of the strop or hone, and light pressure is applied, the edge 10 of the blade 7 will be in contact with the grooved surface 2 of the strop or hone at the proper angle to ensure correct sharpening. This clip maybe provided with means for ensuring the correct positioning of various types of blade in the gripping jaws 5 and 6.

The clip or holder for holding the blades may be of wedge-shaped formation, as shown in Figure '7, and provided with

bosses

11 and 12 or the like to hold the various types of blade in correct sharpening position. The wedge-shaped holder may also be provided with a ridge or flange 13 for facilitating the moving thereof during the operation of sharpening.

In operation with strops or bones of the flat type, the blade 7 is arranged between the jaws 5 and 6 of the clip or holder which is then laid on the grooved or abrading surface 2 of the strop or hone, the strop being arranged to be flat upon a table. The holder with the blade in position is then moved along the grooved surface 2 of the strop with a little pressure, which operation sharpens one'side of one edge of the blade '7. The clip is then turned over and the. operation repeated on the other side or hone, as illustrated in Figure 4, it is only necessary to placethe blade in position and apply light pressure to its centre, as illustrated in Figure 6. A few reciprocations of the blade in both directions will, under these conditions,

efiect the desired sharpening.

What I claim is:

A device for sharpening razor blades con- EDWIN GEORGE PAVITT.

CERTIFICATE or connection Patent No. 1,934,139, November 7, 1933,

EDWIN GEORGE iAViTT.

it is hereby eertified that the above numbered patent was erroneously issued to "Newtsn Sales Company Limited, of London, Engiand," as assignee of the entire interest in said invention, whereas said patent should have been issued to the inventor said "Pavitt" and the "Newton Saies Company Limited, of London, England," as assignee of one-hziii interest only as shown by the records of assignments in this office; and that ths said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and seaied this 12th day of December, A. 1). 1933.

F. M. iiopkins (Seal) Acting Commissioner of Patents.