US1910710A - Appliance for razor blade sharpening devices - Google Patents

Description

May 23, 1933. R, NAVARRE 1,910,710

APPLIANCE FOR RAZOR BLADE SHARPENING DEVICES Fild- Sept. 15, 1950 2 Sheets-Sheet l FIE- 3 SWIM/who;

ROBERT NH V8 RRE May 23, 1933. NAVARRE 1,910,710

APPLIANCE FOR RAZOR BLADE SHARPENING DEVICES Filed Sept. 13, 1930 2 Sheets-Sheet 2 INVENTOR ROBERT NHVHRRE ATTORN EY i 45 rollers.

l at entecl May 23, 19 33 PATENT OFF1E ROBERT NAVARRE, F CLEVELAND, OHIO APPLIANCE FOR RAZOR BLADE SHARPENING DEVICES Application filed September 13, 1930. Serial No. 481,723.

My invention relates to appliances for razor blade sharpening and stropping devices of the type in which one or more revolving rollers or disks frictionally engage the cutting ed es of the blade to re-establish a keen and fine cutting edge thereon, and its primary object is to provide a practical and inexpensive appliance for redressing the surfaces of the grinding and stropping rollers or disks of such sharpening and stropping devices by uniformly rubbing upon and into such rollers or disks a deposit instrumental in putting a fine edge on a blade and not liable to be oxidized, discolored and covered with grease or other objectionable deposit interfering with the perfect working of the device. According to my invention the general shape and form of the appliance resembles the razor blade for which the sharpening and '29 stropping device is especially constructed so that the appliance can readily be used to redress the sharpening device without change thereof and to be actuated in the same manner as a blade inserted in said device and by 725 its frictional engagement with the surface for redressing a stropping device of general known type, the twinplex stropper, and the drawings forming part of said description.

In these drawings, Fig. 1 shows a perspective view of a double edge dressing appliance according to my invention. Fig. 2 shows a plane View with parts broken away of a stropping device with the appliance positioned upon the pulled out blade holder. Fig. 3 shows a side view partly in section of Fig. 2.

" Fig. 1 shows a sectional view on line 44: of

Fig. 2, with the blade holder pushed into the stropping device and the handle slightly turned for full frictional engagement of the dressing appliance with the sharpening Fig. 5 shows a sectional view similar to Fig. 4 on line 55 of Fig. 2. Fig. 6 shows a plane View of a dressing appliance with the dressing edge partly broken away, and Fig. 7 a section on line 77 of Fig. 6.

i Fig. 8 shows a modified form of a dressing a razor sharpening device B similar to the rollers or sharpening elements 77 be forced appliance for a stropping device for single edged razor blades, and Fig. 9 a sectional view on line 99 of Fig. 8.

The dressing appliance A shaped to fit all razor sharpening devices for blades with two or three holes which blades fit the Gillette razor, includes a perforated base portion 2 of thin steel or bronze having its opposite edges 3 lined by narrow strips 4 of lead or other equivalent soft metal secured thereto by soldering or in any other way, for instance as shown in Fig. 6 by interlocking these strips with dove-tailed cutout-portions 5 in edges '3 of base 2. Lead strips 4 are preferably of wedge-shaped form to assure a gradual pas- 55 sage to the central perforated portion 6 of base 2 and of slightly curved surface to assure proper riding contact with the eccentric surface of sharpening devices or rollers 77 of device described in U. S. Patent No. 1,135,511. Rollers 77 are rotatably supported in the front and rear wall of main frame 8, preferably constructed of sheet metal, and each roller supports at its one end a gear 9-9 respectively. The two gears are in mesh with each other so that the rollers or sharpening elements 77 are rotated in opposite directions. A blade holder 10 having at its front end a pinion 11 is also rotatably mounted between the front and rear walls parallel to rollers 77 and pinion 11 is driven by a gear sector 12 attached to roller 7 in front of the plane of gear 9 to give blade holder 10 an intermittent movement when roller 7 is rotated. The ratio of the gear teeth of sector 12 and the pinion is so that on each revolution of the roller or sharpening element 7 the blade holder is given a half-revolution. Blade holder 10 includes a slidably mounted extenson 14 provided with pins 15 fitted to the openings of a double-edged razor blade, which extension may be pulled out through an opening in the rear wall of frame 8 to a position in which a blade may be attached thereto. The dressing appliance A is inserted into the razor-sharpening device in the same manner as a blade and the two lined edges of appliance A will during rotation of upwardly by such elements in which action the pressure exerted upon the elements is caused by the resiliency of base 2.

When the appliance A has been placed in position 5 to 6 turns of elements 77 redresses said elements sufiiciently.

The razor appliance described above is designed for a double-edged razor blade sharpening device, but it is obvious that the same principle may readily be applied to singleedged razor blade sharpening devices. An appliance of such character is shown in Figs. 8 and 9, in which the base 2 is only provided with lead strips on one edge to provide dressing appliances for sharpening devices for single-edged blades such as Gem, Ever- Ready, Enders, Keen Cutter, Christy, and Auto-strop blades.

While I prefer to use as dressing material, soft lead, I do not restrict my invention to the use of lead only but to any soft metal adapted to deposit by frictional contact a thin film upon a surface over which it is forced, metals such as zinc, aluminum, tin, etc.

What I claim, is:

1. An appliance for surfacing and dressing the grinding elements of a rotatable razor blade sharpening device, comprising a base shaped to take the place of the razor blade inserted in said device and provided with narrow strips of soft metal secured to one edge of said base.

2. An appliance for surfacing and dressing rotatable razor blade sharpening devices comprising a yieldable perforated base shaped to be exchanged for razor blades seated in said device during sharpening proceedings, and narrow strips of soft metal secured to one edge.

3. An appliance for surfacing and dress ing rotatable razor blade sharpening devices comprising a yieldable perforated base shaped to fit the seat for razor blades in said devices and narrow strips of soft metal sel(gured to opposite sides of one edge of said ase.

4. An appliance for surfacing and dressing the sharpening elements of rotatable razor blade sharpening devices comprising a base shaped to the form of the razor blades to be sharpened by said devices and strips of lead parallel to and interlocked with opposite edges of said base.

5. An appliance for surfacing and dressing the rotatable grinding elements of razor blade sharpening devices comprising a yield able base identical in shape and form tothe razor blades to be sharpened in said devices,

said base having its edges formed with dove tailed recesses and a series of thin strips of soft metal of half round cross section arranged parallel to the edges of said base and interlocked with the dove-tailed recesses thereof.

6. An appliance for surfacing and dress-

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