US1474107A - Safety-razor-blade holder - Google Patents

Description

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of what are quite universally tacle composed Patented Nov. 13, 1923.

stares earner DANIEL J. DALTON AND WILLIAM A. BIONIDI, OF CINCINNATI, OHIO.

SAFETY-RAZOR-BLADE HOLDER.

Application filed .Tune 11, 1923. Serial No. 644,603.

To all whom it may concern:

Be it known that we, DANIEL'J. DALTON and WILLIAM A. Brown, both citizens of the United States of America, and residents of Cincinnati, in the county of Hamilton and State of Ohio, have invented a certain new and useful Improvement in Safety-Razor- Blade Holders, of which the following is a specification. V

This invention relates to holders or receptacle for safety-razor blades in manipulating them by hand in honing, stropping and otherwise sharpening them for use in shaving, and, more particularly, in the reverse handling of double-edge razor-blades or commonly known as the Gillette or similar type that is flat and thin and that have usually but a very shallow depth of real steel along their cutting edges and need or require a reliable holder in the operation of sharpening them.

Our invention consists of a blade-recepof a main continuous ful crum rock-bar of half-round crosssection with its flat side disposed or facing upwardly and having at its outer end a raised rounded projection, a narrow inwardly-open cross slit or kerfat the base of said raised projection, a right-angled half-round rear-extension to said rock-bar with its flat side fac ing downwardly and having at its extreme rear end a round screw-threaded extension or shank, and a handle having at its fore end an internally-threaded opening or socket for the detachable coupling-engagement of the said threaded rear end or shank of the fulcrum rockbar, whereby the said flat, thin double-edged razor-blade is held in said receptacle in firmly clamped position on the said upwardly-facing fiat side of theme]:- bar that has been first inserted through the customary holes in said blade sothat the rear edge of the metal in the hole at the fore end of the latter shall lie in engagement with the said cross-slit" and with the flat rear end of the blade in contact with the flat underside of the said half-round rear-extension of the rock-bar, with the inner screw-threaded socket end of the handlein detachable-engagement with the threaded rear end of the rock-bar and with its inn r edge in bearingcontact with the inner edge or end of the blade that will keep the blade in proper place in the holder-receptacle so that its opposite longitudinal sharp edges can be alter brought into frictional honing or stropping engagement with their respective hone and strop appliances over whose surfaces the fulcrum rock-bar, on both sides thereof, is reciprocally drawn, back and forth, in the operation of sharpening the blade.

The details of structure of our invention will be fully hereinafter described in conadded or auxiliary nut feature between the detachable-handle and the inner end of the blade on the rock-bar shank; and Fig. 6, a

longitudinal section of the holder device but showing the handle as an integral part thereof, instead of being detachable as in the other views, omitting the blade and showing said handle partly in elevation.

A indicates the ordinary double-edge blade of the said well known Gillette type, provided with the usual set or series of openings on, b and 0 that are adapted to be engaged with the lock pins or stops (not shown) of the safety-razor frame used in shaving.

6 is a continuous, main, fulcrum rock-bar, of half-round cross-section, its round face being disposed downwardly in one phase of the use of the holder-receptacle, as best shown in Figs. 3, 4L and '6. This main fulcrum rock-bar corresponds in length to that between the middle of the fore-opening a of the blade and the rear edge of the rearopening e of the blade, as best disclosed in Figs. 3 and 6, and it has at its outer or fore end an angular raised and rounded projection 7 which is provided with a thin crossslit or undercut 8, (as best seen in Figs. 8 and 6), facing inwardly toward and on a level with the fiat upper face 9 of the said main fulcrum rock-bar 6."

At the rear 0: inner end of the main fulcrum rock-bar '6 we provide an upward angular extension 10 that is of half-round crosssection, the same as that of "the main rock-bar, but with the flat face thereof disposed downwardly and on a level with the upper face of the said cross slit or kerf' 8 in the" fore end of the main rock-bar 6. a

At the extreme rear end of the said e21 tension 10 we provide a screw-threaded shank 11, of round cross-section, to accommodate the inner internally-threaded end 12 of the elongated round-bar; handle l3-by the aid of which latter the holder-receptacle and its duly clamped blade areheld in the hand and conveniently manipulated,

, back and fortln along the hone Or strop in sharpening said blade, the smooth, main, round-faced rock-bar 6 being used asa support for the blade as it rides along the surface of said hone or strop, for one face of the blade, and, also, as a fulcrum on which to pivot the device at each end of its stroke in reversing the edge to be acted upon.

Thebla-de is set in place in the holderreceptacle, with the handle removed, by first inserting the main rock-bar through the inner or first hole 0, to the right, until it reaches the round-faced angular extension 10, at "which time the rock-bar is'tilted toward the bottom face of the blade and thereby bringing the raised angular projection 7 into engagement with the outer or third hole a of the blade. The upper fiat face 9 of the main rock-bar 6 is now in parallel contact with the said bottom faceof the blade and the latter is then drawn outwardly so as to bring its outer end into engagement with the cross-slit or undercut 8 at the foot of the said round-faced angular projection 7 to lock the fore end of the blade in the desired place in the holder-receptacle. At this time, the handle 13 is turned into place'at the rear threaded shank-end llof the rock-bar until its inner edge rests and contacts easily with the inner end of the blade, and thus the latter is: properly clamped, without buckling, for its reciprocal longitudinal and pivotal movements over the surface of the hone, or of I the strop in the sharpening .of its opposite longitudinal cutting-edges. V

r The blade-holder, as thus'far described,

is ofbuttwo members or pieces and, therefore, extremely simple, as well as economical, 'in both its manufacture and its subsequent use, but it is obvious that it can be made of three parts by simply adding an auxiliary-nut 14 that is inserted on the threaded shank 11, be-

tween the inner end of the placed razorblade and'the inner end of the detachablehandle, as best shown in Fig. 5, wherein 'the said auxiliary-nut 14: is firstplaced onthe shank' 11 and then adjusted up to clamping-contact position against the inner end of the blade and, finally, thejsaid detachable handle follows on the saidshank, the said handle, in such event and instance,

acting as both a manipulating means and as an outer nut-detalning meanson the shank, for double-clamping effect, but at the expense of an 1 additional member or part over that of the said two part form, -When the handle has been turned in easy contact with the auxiliary-nut 14 the latter is'then turned backward against the inner end of the handle, so that the nut is locked free from hard pressure-contact with the blade but not suflicient to allow 'an looseness of the blade inthe holder-receptacle.nor its escape therefrom.- l p The reverse side or face of the blade 15 sharpened by simply reversing the holder and its blade conte'nt,'so that they may ride 7 on the spaced'round faces .7 and 10 over the hone or the strop surface, the'same as with the continuous round fulcrum-face 6.'

; In 6, it will be seen that the'blade holder-receptacle, and the handle 13 are made integral, the threaded shank 11 being a reduced extension of the handlefland no threaded socket is thus'required in the inner end of said integral handle that is not then a detachable one in connection with the said blade holder-receptacle.

as in the other views,.but the auxiliary-nut A has no real jamb-service as would otherwise be-present in the use of a detachable handle as in Fig. 5. Considerable diflerence in the lesser cost of manufacture re sults in the use of the form seen in Fig. 6, as against those of the other views, and

there is no detachable handle to become loose andiastray in handling the device.

The shoulder 15 prevents the auxiliary -nut li-beingturned uptootightly against the inner end of the blade that would otherwise bend and bulge or buckle the latter The 1 said; blade holder-receptacle is otherwise made away from its flat plane seat 9,iand thereby seriously affect the sharpening of its opposite longitudinalcutting-edges.

We claim v 1. A safety-razor blade-holder compris- .ing a fulcrum rock-bar having a bodyportion of half-round cross-section, an upturned undercut projection at the fore end. of'the upper fiat face of the said rockbar, an angular extension at the rear end of the rock-bar the same being of halfround cross-section with its flat face dis or positioned blade, and described.

2. A safety-razor blade holder-receptacle for use in the sharpening of the blade and comprising a main fulcrum rook-bar whose body-portion is of half-round cross-section with its flat face'disposed upwardly, an

substantially as shown upright round-faced projection at the fore or outer end of said fiat upper face of the body-portion of the rock-bar and having an undercut kerf or cross-slit in its base, an angular upward round-faced extension at the rear or inner end of said flat face of the body-portion of the rockbar also of substantially as 295

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