US264742A - Albert il south - Google Patents

Description

` (Model.) v

` H. NORTH.

RAZOR.

PatentedfSept. 19, 14882` ALBERT NORTH, OF BRIDGEPORT',

ATENT erica.

CONNECTICUT, ASSIGNOR T0 JAMES D. FRARY, or SAME PLAGE.'

RAZOR.

SPECIFICATION forming part of Letters Patent 110,264,742, dated September 19, 1882.

` Appneauonvfued Mal-n 1o, lese. (Model.)

T o all whom 'it may concern Be it known thatI, ALBERT H. NORTH, of Bridgeport, in the count-y ofF-airield and State of Connecteur, haveinvented a new Improvenient in Razors; and I do hereby, declare the following, when takenin connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear,and exact description of the same, and which said drawings constitute part of' this specification, and represent,in v

Figure 1, a side View ofthe blank for the blade; Figi?, a side view of the blank with the hack and shank cast thereon; Fig. 3, a trailsverse section through the blade; Fig. 4, a transverse section of the blade complete.

This invention relates to an improvement in the manufacture of razor-blades.

In the usual construction ot' blades which present a concave 'surface upon both sidesthat is to say, which in transverse section are substantially the shape seen in Fig. 4-the blade and shank are forged complete from steel into nearly the required shape, then ground and finished. This :forging operation is usually done by hand for the best'class of razors, and

requires the'most skilled labor.

To avoid the expense of forging, razors have been made with .the blade, cut from sheet-steel, introduced and secured into a back of different metal, the back forming simply a beadlike ridge on the back of the blade. This construction, while it avoids the forging, permits the making of the blade from sheet-steel, and the tempering ot' that blade before the back is attached, is equally expensive, because of the labor in forming the back and inserting the blade; but when done the shape of the bladel does not possess the advantages of the double! concave razor.

'lhe object 0f this invention is to construct the double-concave razor witha sheet-metal blade; and it consists principally in a blank for the blade cut fro'm sheet-steel, having a back or upper part and shank rast thereon, the back extending down onto the blank, so that the sides may be ground'and attainv the usual double-concave shape,.as more fully hereinafter described.

A represents the blank for the blade, which 5o i1otcl1,d,at the heel. The blank for tile blade `55 is tempered or hardened, and 4when thus prepared is placed in a mold, afd upon it the back B and shank C are cast, with an exten- 'sion,]), therefrom down upon the heel part,

the shank of this cast part being substantially 6o 4ot the usual form. The corrugations b serveto engage the casting with the steel part ofthe blade, and the tanga, extending into the shank,

serves to. strengthen that part and prevent its bending. I prefer to use for the casting what is commonly termed white-metal, or an alloy which will present nearly the steel color when highly polished; but it must be a metal such as known as soft xnetal-that is, a metal which fuses 7o atso low a degree of heat that when itis poured upon the blank in its fused state it will not materially affect the tempered steel. y

In making the casting I leave` sufficient thickness at the lower` edge, as seen iin Fig. 3, 75

to insure an even flow ofthe metal. The bladethus prepared is then ground in the usual manner for grinding razors, so that' the 'regular concave is given to the `sidesas seen in Fig.

4, extending from the upper erige or back down 8o to the edge of the blade, the concavi'ty depending upon the diameter of the stone. Thus I produce a razor the blade of which has all the advantages of the best forged steel, but without the expense ot' forging, the casting ot the 85v back and shank being much cheaper than the process of forging.

Instead of the corrugations, perforations maybe made through the blank A, yso that the metal cast thereon will flow through the go perforations, and thus unite the two sides of the back; or the blank may be tinned, so that the metal cast thereon will unite with the tinned surface of the blank, or any irregularity may be made in the surface ofthe blank in thereon, the sides of the casting; and blank 1o casting. ground together to present n concave surface,

The tang' a may be omitted; but I prefer substantially ns described.

to employ it, because of the liability of the I Shank to bend 1n strapping or using the razor, ALBERT H. NORTH.

which bending is prevented by the steel tang.

I olain1- l l Witnesses: A razor-blade consisting of the steel blank Jos. C. EARLE,

A, with the oftmeta-l back and shank cas: J. 1I. SHUMWAY.

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