US2547104A - Method of making razor heads - Google Patents

Description

pril 3, 1951 w. J. WHITTON 2,547,104

METHOD OF MAKING RAZOR HEADS l Filgd D60. 5, 1949 nunnunuuuunnuuuunflunnuuunu 3 C5 C E I g E BY S L m A TToRNEY Patented Apr. 3, 1951 in UNITED STATES, TENT OFFICE 2,547,104 METHOD OF MAKING RAZOR HEADS Wil ed J me Whitton, a Francisco C li -1 Application December 5, 1949, $erial No. 132,195-

1 Claim.

This; invention relates to improvements in razors and has particular reference to a method of making the cutter head of a razor of the electric type.

The principal object of this invention is to provide an efiicient, simple and economical means for forming the cutter head of an electric razor.

A further object is to provide means for forming the head in such a manner that it will have a minimum amount of friction through the fact that the parts conform to each other with minimum stresses.

A further object is to produce a cutter head which may be readily assembled out of stock material and without complicated micrometer grinding.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a fragmentary cross-sectional view of the head portion of the driving mechanism of an electric razor,

Fig. 2 is an enlarged top-plan view of the two stationary head blanks,

Fig. 3 is an enlarged elevation of the head blanks of Fig. 2 after curving,

Fig. 4 is an enlarged top-plan view of one of the comb supports,

Fig. 5 is an end elevation of Fig. 4, on an enlarged scale showing the comb support after bending,

Fig. 6 is an enlarged top-plan view of a comb blank,

Fig. 7 is an end elevation on an enlarged scale of the comb after bending,

Fig. 8 is an enlarged cross-sectional view taken on the line 8-8 of Fig. 1, and

Fig. 9 is an enlarged detail cross-sectional view showing the manner in which the parts are assembled.

The ordinary electric razor comprises a head in which there is a pair of cutters, one of which slides past the other so as to perform a clipping action. These cutters are extremely difiicult to form, grind and adjust, so that there will be no undue amount of friction which will be too great for the fractional horse-power motor commonly used in such devices.

I have, therefore, devised a method of building up a cutter head by employing blanks cut to shape and thence formed and secured in place thus producing a precision job without thenecessity of grinding.

In my coepending application, Serial No. 26,611, filed May 12, 1948, I have shown a similar type of razor to which the present head could be attached.

In the accompanying drawings wherein, for the purpose of illustration, is shown a preferred embodiment of my invention, the numeral 5 designates the body of the razor having a motor 6, driving a cam i, which is engaged by a yoke 8, mounted upon the end of a rocker arm 9, pivoted on trunnions I I and I2, and carrying forked arms 13 and I4, which forked arms, in turn, have their upwardly-projecting ends engaging a slider plate l6, supported on ball-bearings H.

The description thus far refers to the standard razor construction and has no part in the present invention.

The present invention consists in mounting on the slider plateg, U-shaped slotted cutters l8, spaced longitudinally on the plate, and to mount on the head, through the medium of removable end plates 19, a pair of curved stationary head blanks 2| and 22, which blanks serve to support a combined comb support 23, and a comb 24.

The stationary head blanks are first formed, as shown in Fig. 2, and then bent, as shown in Fig. 3.

The comb support is then formed, as shown in Fig. 4, and then bent, as shown in Fig. 5.

This comb support is punched from relatively heavy material so that it will have inherent rigidity.

The comb shown in Fig. 6 is punched from a relatively thin material in the order of .002 of an inch and then bent, as shown in Fig. 7.

In assembling, the comb is placed within the comb support and the combined comb and comb support are then placed in one of the slots A, for instance, of the blank 2|.

After all of the openings in the blanks have been filled, the parts are swetted together to form a unitary structure.

The blanks and their assembled parts may now be attached to the head through the medium of the plates l9 and, in so doing, each one of the combs will overlie its respective cutter l8 (see Figs. 8 and 9) and due to the flexibility of the thin slot portion of the comb, good contact between the comb and the cutter will take place without undue friction. Also this flexibility automatically permits adjustments within the head for minor inaccuracies in assembling.

It will thus be seen that I have created a razor head which can be easily and economically manufactured and one which will accomplish all of the objects above set forth.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described my invention, I claim:

That method of forming a razor head on the body of a razor having a transversely curved end face which consists in securing on said face a slider plate having a series of spaced rows of U- shaped cutters, punching aseries of elongated metal strips with closely spaced slots'to form combs, bending said strips to U-shape with flaring legs, fitting said strips on the rows of cutters, punching a series of flat elongated strips each with an elongated slot, bending said strips to conform to said combs and constitute supports, punching flat head blanks with spaced parallel sided slots conforming in length to said combs to form head plates, bending said head plates to conform to the curvature of said slider plate whereby the slots in the head plate assume dovetail form in cross-section with the transversely Wider parts of the slots adjacent the slider plate inserting said supports in the head plate slots from the wider opening of the dove-tails, assembling the head plates and supports on the combs, and securing said head plates immovably on said body. I

WILFRED JAMES WHITTON.

REFERENCES CITED The following references are of record in the file of this patent:

' UNITED STATES PATENTS 0 Number Name Date 2,223,768 Martin Dec. 3, 1940 2,234,929 Lynch Mar. 11, 1941 2,292,858 Alexary Aug. 11, 1942

Images