US1574793A - Stabilizer for safety-razor blades - Google Patents

Description

March 2 1926.

H. B. COHEN STABILIZER FOR SAFETY RAZOR BLADES Filed Ma'rch s, 1925y R lllllllm @ff-Mw D Patented lVlar. 2, 1926.

'UNITED' lSTATES I'IENRY R. oOnEN,.OF NEWYORK, N. Y., AssIeNoR To RAZOR I'Ronue'rs-coRrORA TION, or LONG ISLAND CITY, NEW YORK, Av CORPORATION or NEW Yo'Rx.

srABILIzER EOR sAEETY-RAZOR BLADEs Application filed March 5, 1925. Serial No. 13,070.

To all whom t may 'conce/m:

' -Beit known that I, HENRY B. COHEN, a citizen of the United States, residing at New York city,'in the borough of tan and State of New York, have invented certain vnew and useful Improvements in Stabilizers for Safety-Razor Blades, of which the following'is a specication.

i 'Ihis invention relates to safety razors of the kind inwhich a relatively thin blade is held between a base and a cap, usually under conditions which curve the blade over the base, and by ,regulating the curvature ordefl'ectionl of the edges of the blade, determine the shaving efficiency ofthe razor. This method of determining the position of the cutting edge of a safety'razor blade is objectionable for the reason that it holds the blade between a bearing surface on the base and the impinging edge of the'cap, which are spaced apart in the plane of the blade, and therefore render it im ossible to stabilize or rigidly hold the e ge of the blade exce t when the entire surfacef, theblade, is c amped down tightly upon thetcurved surface of the base, and, therefore, in a position whichdefeats shaving efliciency. It has been proposed to obviate this difficulty by providln along the face impinging portion f the Iiase, parallel vwith the comb, a channel or groove which lies beneath the inlpinging edge of the cap and therefore permits the cap to depress the edge over vthis groove while the inner wall of the groove serves as a fulcrum over which the blade is curved. Butthis construction is undesirable because of the weight of the base and the depression of the cutting edge to or below the lane of the comb. t

Now, t e object of the lpresent invention'is to provide means, in the form of a very 1ight,.inexpensive, and readily applied attachment, whereby? existing safety razors of the kind havinga continuous arcuate blade freceiving surface, may be ada ted to iirmly gri the marginal portion o a thin razor bla e between two Isuperposed. jaws which, while drawn tightly together and therefore adapted `to hold the edge rigidly, or in other words stabilize the' edge, will positively surface of thet comb as to accurately and -without adjustment define the desired cutting eiciency of the razor. In other words,

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present the edge rigidly in al plane suliclentlyl removed from .the facial the purpose is to equip each. razor of the kind described lso thaty it will give vto the blade a 'predetermined set, rigid and free from chattering, by the mere act of drawing. the base and' cap together to I the, utmost TheV invention proceeds upon the' principle of applyingto each marginal portion of the head or base of a razor, a member constituting a clamping jaw which, on the one hand, willhave a dimension which .accurately predetermines the..` spacing of the.' razor edge from the plane of the comb, and on the other hand coacts with the immediately superposed portion of the clamp- `ing cap to cause the blade to be rigidly gripped between the jaw and the cap and permit the capvto be .drawn down to its ultimate limit, and thereby insure stability of the edge of the blade without eliminating the saeing of the edge requisite to shaving e clency.

In the preferred vention, the clamping and spacing jaws are united in the form of a frame which not onlyspaces the jaws apart to insure their.

proper relation to the combs of the base, but embraces'the base laterally to resist displacement of the jaws in vthat direction while theblade and cap are being assembled with 4the-pbase, and, also preferably earries a pair of extensions which embrace the aligning pins of the cap or other elements which dene the relation of the cap and base, and thereby determine the distance of .the spacing and clamping elements back from the combs.

In the accompanying drawing', in which two embodiments of the invention are shown by Cway of illustration--` Figures l and 2'are axial sections, in two lplanes at right angles to each other, of a nown type of safety'razor having one form' of the invention applied thereto; Figure 3 is a section on the line 3"- x of Fire 2; Figure 4 is a perspective view of the attachment shown in Figures 1, 2, and 3; and Figure 5 isa view similar to Figure 4 showing aimodited embodiment of the attachment.

1 represents the buse of almowntype of safety' razor constructed with mar inal` combs 2,v 3 represents a razor blade o the thin iexible type adapted tobe supported on said base with 'its' edges 1n position to be controlled in their shaving effect by the embodiment of the incombs 2, and 4 represents a cap adapted to be drawn to the base-1 by means of a sleeve 5 'threaded upon the shank 6 o f the cap 4. The cap 4 is provided with 'the usual aligning pins 7 which, like shank 6, pass through openings in the blade 3 'and the base 1, thereby aligning the cap and blade with the base and insuring the proper relation of the cutting edges of the blade with the combs 2.

The opposed faces of the base 1 and-the cap 4 have customarily been formed on different arcs, the are of the base being fiatter than that of the opposed surface of the cap. In razors of this type, the blade, being normally flat, is impinged by the outer edges of the cap and by inner portions of the base as the cap is drawn toward ihebase,

.so that the blade is flexed and the cutting edges are depressed toward` the facial surfaces of the combs, and the approach of the cap to the base is regulated. by screwing the sleeve upon the shank until the resultant spacin of the edges of the combs give the desire shaving eficiency; but/inasmuch Vas this manipulation involved holding the blade between surfaces spaced apart, as distinguished from immediately superposed gripping faces, it resulted in an unstable or chattering condition of the edge of the blade, particularly when increased of the edges was desired.

jNow, the present invention provides be-v neath the blade 3 a pair of combined spacing and gripping jaws 8 which are sufi-ileiently near the combs 2 to enter into coaction with immediately superimposed portions 9 of the cap 4 and cause the blade 3 to be firmly gripped near enough to its cutting edges to stabilize the latter, and yet.

without the possibility of depressing the cutting edges more closely to the combs 2 than is permitted by the thickness of jaws 8, even though the cap be drawn down to the extreme limit by means of the threaded sleeve 5. Thus, the thickness of the applied element 8, and not the degree of adjustment of the cap 4, determines the cutting eiiiciency of the razor. The elements 8 can, of course, be made of any desired thickness.

In order to make the elements 8 very cheap and easily applied, and very accurate in their application, they are assembled in a frame-like structure, such as illustrated in Figure 4 or Figure 5. In Figure 4, theyy are spaced apart and united in a pair by end bars 10 lying in the planes of the ends of the base 1 so as to snugly embrace the latter and resist displacement in the direction of their length; and said end bars 10 carry pin-engaging elements in the form' of tangs 11 positioned to' embrace the under surface of the base 1, thus preventing displacement of the jaws 8 upwardly with reference to the base, and recessed as shown spacing at 12`1to receive the pins 7 of the cap and thereby determine the distance of the jaws 8 inwardly .from the Icombs 2 and prevent displacement of the'lattachment transversely of the base. j.

According to lFigure 5, the attachment is formed of, wire or other drawn material or stock of round or equivalent section, and' embodies in its organization the spacing and clamping members or jaws 8a adapted to lie on the upper surface of the base 1, just as illustrated in the'easel of the jaws 8, the end members 10a extending in the plane of the ends ofthe base 1 and. across the same to the plane of the under surface of the base, and the Shanks 11a csitioned to embrace the under surface o the base and carrying eyes l2 adapted to receive the pins 7 Obviously, the invention may take other forms and be constructed of other material than those here shown, so long as it involves the spacing and clamping jaws adapted to provide upstanding elements upon the upper face ofthe base, and means for engaging the existing lines or elements of the razor for the purpose of positioning the attachment and locating the jaws appropriately to the functions which they are to perform, as herein described.

1. A blade stabilizing attachment for safety razors of the type employing a iexible blade clamped between a base and a cap; said attachment comprising spacing means constructed for interposition between the base of the razor and the blade to be mounted thereon, and to thereby elevate the blade upon the surface of the base; said spacing means having at its ends means for embracing the ends of the razor base to prevent displacement y thereon.

2. A stabilizing and spacing attachment for flexible blades of safety razors of the ltype employing a base and a cap confining the blade upon the base; :said attachment comprising a pair of jaws adapted to overlie the surface of therazor base in position to support marginal portions f the blade from vsaid surface and coact with superposed portions of the cap; said jaws being connected together by means extending beneath and embracing the razor base and defining their position thereon.

3. An attachment for safety razors of the type vin which a flexible blade is confined between a base and a cap; said detachment comprising a pair of jaws adapted to overlie the surface of the base of such-a razor and support therazor blade with its cutting edges in a plane spaced rtherefrom, and end members connecting said jaws together and n' position to underlie the ends of the razor ase.

4. An attachment for safety razors of the lll type in which a iexible blade is conlned between a base and a cap; said attachment comprising a pair of jaws adapted to overlie the surface of the base of sueh a razor and support the razor blade with its cutting edges in a plane spaced therefrom, end lnembers connecting said jaws together and in position to eng-age the ends of said base, and extensions on said end members in position to engage beneath the base and resist lifting of the jaws from the latter.

5. An attachment for safety razors of the type in which a flexible blade is confined between a base and a cap; said attachment comprising a pair of jaws adapted to overlie the surface of the base of such a razor and support the razor blade with. its cutting edges in a plane spaced therefrom, end members connecting said jaws together and in position to engage the ends of said base, and extensions on said end members in position to engage beneath the base and resist lifting of the jaws from the latter; said extensions bein constructed at their ends with means inter ocking with a ortion of the razor to resist displacement o the attachment in the plane of the base.

6. 1n combination with a safety razor having a base, a cap coacting with the base to confine a flexible blade thereon, and aligning pins for positioning the cap relatively to the base; a blade stabilizing attachment comprising a pair of jaws constructed to overlie the surface of the base, end members uniting said jaws, spacing them apart, and engaging the ends of the base to resist displacement vof the attachment thereon, and extensions from said end members .underlying the base and provided at their ends with means receiving the aligning-pins of the razor to resist displacement of the attachment -in the plane of the base.

Signed at Long Island City, L. I., New York, this th day of February, 1925.

HENRY B. COHEN.

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