US1247268A - Safety-razor. - Google Patents

Description

H. B. HARTMAN.

SAFETY RAZOR. 4

APPLICATION FILED IULY I, IsII.

l 247926. Patented Nov. 20, 191'?.

Witness HARRY B. HARTMAN, 0F SCOTTDALE, PENNSYLVANIA.

SAFETY-RAZOR.

Specification of Letters Patent.

Patented new. ao, ier a Application-filed July 7, 1917. Serial No. 179,118.

To all whom it may concern Be it known that I, HARRY B. HARTMAN, a citizen of the United States of America, residing in Scottdale, in the county of Westmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Safety-Razors, of which the following is a true and exact description, reference being had to the accompanying drawin s, which form a part thereof. l

ly present invention relates to safety razors and particularly to safety razors of the type in which a blade is detachably secured in a holder or clamping device to which an operating handle isl attached. One main object of my invention is toprovide a razor, of the type referred to, with improved means for so connecting the handle to the blade holder that the handle may be readily 'scribed preferred embodiments adjusted relative to the blade holder to vary the relation between the active cutting edge of the blade andthe hand of the user, and therebypermit the razor to be held in any of the various ways in which different persons may need or prefer to hold the razor to get the best results.

A further object` of the invention is to provide an improved form of blade holder adapted to provide a yielding resistance to the clamping nut of my improved handle construction without requiring the iexure of the blade fon this purpose.

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed hereto and forming a part of this specification. For a better understanding of the invention, however, and the' advantages possessed by it, lreference should be had to the accompanying drawings and descriptive matter, in ,which l haveillustrated and deof my invention. j

Of the drawings:

Figure 1 is a plan view of a complete razor.

Fig. 2 is a section taken on the line 2 2 of Fig. 1. A

Fig. 3 is a section taken on the line 3 3 of Fig. 1.

Fig. 4 is a perspective view of the handle connecting means employed in Figs. 1, 2 and 3. j

Fig. 5 is a section on the line 5 5 of Fig. 2.

' less Fig. 6 is a section taken similarly to Fig. 2, illustrating'a modified form of handle connectlon.

7 is a view similar to Fig. 4 illustratmg the construction employed in Fig. 6.

Fig. 8 is a plan view of the bladeholder of an existing type of razor to which my improved handle adjustment may be applied, wth parts in section on the line 8 8" of Fig. 9.

Fig. 9 is a transverse section of the blade holder shown in Fig. 8 with my handle adjustment applied thereto.

In the drawings, and referrin'g first to the construction shown in Figs. 1 to 5, inclusive, A represents the double-edged blade which may be either flexible or rigid and is shown as provided with central notches A in its ends. The blade A is received in a blade holder comprising a front plate B and a back plate or guard member C. The front plate comprises a body portion on top of which the blade A rests land uprising end portions B', to which are hinged resilient lever arms B2, (which normally have their free ends opposite one another adjacent the center of the body portion. The guard or back plate C normally lies between the body portion of the front plate B and the arms 2, and is formed at its ends with lugs or teats C', which pass through the blade notches Af and into apertures or sockets B3 formed in the front plate and thus fix the position of the blade A with respect to the blade holding means. As shown, the guard C is formed with comb teeth C2 and C3 at its opposite edges.l The teeth C2 project a distance from the adjacent edge of the blade than do the teeth C?, and 1n` consequence it is `possible lto get a closer shave by using the edge of the blade guarded by the teeth C2 than by using the opposite edge of the blade.

A threaded stud Cfr projects centrallV from the upper side of the 'back late and when the parts are assemble passes between the adjacent end surfaces of the arm portion B2 of the front plate. The parts are secured together and the blade secnrel clamped in place between the back plate and the body portion of the front plate B by means of a nut F screwed onto the studv C4 and pressing (indirectly) the free ends of the arms B2 toward the adjacent face of the back plate. rlhe nut F, as hereinafter explained, forms a part of my improved handle connection. The resilient arms B2 are offset as indicated at B4. In consequence when the free ends of the arms B2 are forced toward the front plate by the clamping nut, each arm forms, in eiect, a lever of the second class, having its fulcrum at the point where it is connected to the body of the front plate and applying power to the back plate at the foot tion B4.

The handle D comprises a body' portion which may be of any suitable form, and bifurcations D at one end of the body portion by means of which the handle is adjustably secured to the blade holder.- As shown, the bifurcations D are curved, and areshaped to provide surface portions D2 fitting against a spherical seat E formed inthe upper end of an annular follower or washermember E, which, in the assembled condition of the razor, surrounds the nut F and stud C* and directly engages the free ends of the resilient arms B2. rIhe bifurcations D of the handle have adjacent parallel beveled edges D3 engaged, in the assembled condition of the razor, by the conical pdrtion F of the clamping nut F. Above its conical ortions F the nut F is formed with a globular portion. In practice, the globular portion of the nut F and they surfaces of the bifurcations D overlapping 1t are made approximately spherical withtheir centers of curvature approximately coincident with that of the spherical seat E. In the assembled condition of the razor, the bifurcations D may be sli htly spread apart by the wedge action of t e conical portion F of the nut F, and the'bifurcations thus gripped between the seat E and the conical portion F, so that the globular portion of the nut F is not necessarily in gri ping contact with the bifurcations D. ubstantial conformity in shape of the surface of the lobular portion of the nut F to the overapping surfacesv of the bifurcations D is of advantage, however, .in maintaining a guided relation of the parts in effecting ad# justments.

Loosely mounted on the washer E is a sleeve G. A pin E2 passing radially through. and secured in the wall of the washer E, has its inner end working in a longitudinal slot, F2 in the nut F, and its outer end working in a longitudinal slot G in the sleeve G. The pin E2 thus prevents relative rotative movements of the nut F, washer E, and sleeve G, while permitting a limited longitudinal movement of each of those parts relative to the others. The pin E2 also normally prevents the separation of the parts E, F and G, and thus minimizes the possibility of accidental loss of parts of the razor when the latter is disassembled. A spring H, mounted in a radial opening E2 in the of the offset por` washer E has its opposite ends bearing against the adjacent walls of the nut F and sleeve G. This spring creates al slight frictional resistance to the longitudinal movement of any one of the parts E, F and G relative to either of the others. The sleeve G is shown as provided with a knurled rib or collar G2 to facilitate the relation of the sleeve G and thereby lthe nut F in clamping together the parts of the blade holder and releasing them. The sleeve G is formed at its end adjacent the blade holder with lugs 3, which may be moved into engagement with the blade holder to thereby lock the sleeve Gand the nutF against rotation relative to therscrew stud C4. As shown, the lugs G3 are adapted to enter the space between the adjacent ends of the two arms B2 or into notches B5 in the arms B2 when the sleeve G is rotated 90 in either direction from either of the two positions in which the lugs Gr3 may extend between the ends of the arms B2.

In putting a razor blade in place, the nut F is unscrewed sufficiently to permit the guard plate C and blade A to be put in place with the lugs C passing through the notches A in the ends of the blade A and into the sockets B3 plate B. After this, the nut F is tightened suiiiciently to clamp inserted blade in place. Then the sleeve G, which has previously been elevated with reference *to the washer E and nut F, is moved down to cause the lugs G3 to enter the spaces between the ends of the arms B2, or the apertures or sockets B5; The handle D is then adjusted into the position or positions preferred by the user. The adjustment of the handle D thus provided for is 'practically universal, for ,the handle may be rotated about the axis of the stud C? through a complete circle, and may be turned about an axis transverse to the stud 'C4k vto vary the inclination of the handle to the axis of the stud C4 through an angle of about 90.

in the operative condition of the razor, 1nsures a suicient frictional gri of the bifurcations D of the handle between the conical portion F yof the nut F and the spherical seat E to prevent accidental d isplacement 'of the handleunder the forces to' which the razor is subjected in normal operation. At the same time the flexibility of the lever arms B2 is such that the handle may be readily adjusted Without applying any force thereto beyond that which can be easily applied by the hands of the ordinary user.

- The locking of the nut F againstrotation through the engagement of the lugs Gq with the arms B2 prevents Iany disturbance of the nut F by the frictional drag of the handle as the latter is adjusted.

the blade holder and in the ends of the front v The tension of the lever arm B2,

mames To remove a razor blade, the sleeve G is retracted, and the nut F backed off to sufficiently loosen the blade holder.

To facilitate cleaning the blade holder the nut F may be screwed off the stud C* so that' the arms B2 mav be moved entirely away from their normal positions, and, of course, the blade holder may be thus opened up to facilitate the insertion and removal of a blade.

The modified form of handle connection illustrated in Figs. 6 and 7 differs from that previously' described onlv in the form of the nut and the manner Aof interlocking the nut against rotation relative to the surrounding washer E and sleevefG. In these figures the nut FA is formed at its lower end with diametrically opposed, radially extending projections F1, which pass through notches E3 and G4 formed in the endsl of the washer E and sleeve G, respectively. The general operation of this form of my invention is essentially the same as that of the all) of blade. holders than those 1 to 7, and in Figs. 8 and 9.

embodiment first' described. The nut F of Figs. 1-5 may be,': and is shown as being made in a single ieee,'while the nut FA of Figs. 6 and 7 is s own as made of two parts to permit of its injection in the washer. As shown, the globular head F3 of the nut FA is riveted to the body portion F4 of the nut.

My improved handle connection may readily'be adaptedto use with other forms shown in Figs.

I have illustrated the application of my improved handie-adjusting means to an existing form of blade holder of well known type. The blade holder shown in Figs. 8 land 9 comprises a. front plate B15, having its rear` face curved and provided,v with a central' -threadedstud B1l1 and unthreaded studs B12 adjacent each end, which pass through correspondingly located apertures in a flexible "double-edged blade A10. The blade is held in lace in this type of blade .holder by a bac or guard plate C15, formed with vcomb teeth at each edgeand with apertures resion of the flexible blade A1", in any normal adjustment, insures a suicient `frictional grip on the bifurcations D to maintain the handle D in the desired position or positions, `during the shaving operation. To lock the x mit F or FA, as the-case may be, against .apertures C1", di

rotation with the handle in adjusting the latter, the guard plate C15 is formed with erent pairs of which are entered by the lugs Gs settings of the latter. Certain features of novelty disclosed, but not claimedherein, are claimed in my copending application, Serial N o. 129,915 filed November 7, 1916.

In accordance with the provision of the statutes I have illustrated and described the best forms of my invention now Vknown to in diil'erent angular out acorresponding use of other claimed features.

Having now described my invention, what I claim as new and desire `to secure by Letters Patent, is:

1. In a safety razor, the combination of a body portion comprising relatively movable parts, a handle formed with a slotted portion curved about an axis perpendicular to the length of the handle, lscrew threaded clamping means passing through the slot in said handle portion and clamping 'said portion and the relatively movable parts of the body portion together, and means for releasably holding said clamping 4means 'against unscrewing.

2. In a safety razor, the combination of a body portion comprising relatively movable parts, a handle formed with a slotted concavo-convex portion, scre v threaded clamping means passing through the slot in said concavo-convex portion and clamping said portion and the relatively movable parts of the body portion together, and means for releasably holding said clamping means against unscrewing.

3. In a safety razor, the combination of a guard plate, a front plate having uprising end portions, arms pivoted to said end portions, and each adapted to engage said guard .plate between the-ends of the arm, when the latter is in one position and each adapted to be swun away from said position to-facilitate ceaning the razor, and clamping means acting between the guard plate and the free ends of said arms and adapted toy clamp in place a blade which may be inserted between the front and back plates.

4. In a safet razor, the combination of a guard plate provided with a threaded stud,v a frontplate, resilient arms hinge connected.v

to the ends of the front plate and adapted to turn into position` in which each` extends toward said stud and en ages said guard plate between the ends of t e arm, and to be swung away from said guard plate to facilitate cleaning the razor, and a clamping nut on said stud for forcing said arms a ainst the guard plate to thereby clamp in p ace a blade which may be inserted between the front and guard plates.

5. A razor handle formed with a slotted concave-convex portion, and means for adjustably attaching it to a razor body provided with athreadedclamping stud, said lll() lllti annular seat for said concavo-convex portion, and means for releasably locking said nut against rotation relative to the stud on which it is screwed.l v

6. A-razor handle formed with a slotted concavo-convex portion curved about an axis transverseto the length of said handle, and means for adjustably to a razor body provided with a threaded clamping stud, said, means comprising a Washer formed with a seat for the convex side of said 'curved portion, and a clamping "nut formed with a portion through said slot and towwhich said washer is loosely connected Aand an enlarged portion for engaging said curved handle portion and clamping it against said washer seat, and meansfor releasably locking said nut against rotation relative to said clamping stud.

7. A-razor handle formed with a slotted portion curved about an axis -transverse.to the length of the handle and means for adjustably attaching said handle to a razor body provided with a threaded clamping stud, said meahs comprising a washer formed with an annular seat for the convex side of said curved portion, a clamping nut for forcing said curved handle portion against said seat and means carried by said nut and movable into and out of a position in which it may engage Va razor ody to which the handle isapplied to thereby prevent rotation of thel nut relative to the clamping stud of said body.

8. An adjustable handle connection Yfor a safety razor blade holder, formed with Ya threaded stud, comprising in combination a nut adapted washer surrounding said nut andgmovable attaching said handle" extending `with respect thereto,

to screw on said stud, a f

axially with respect thereto, a handle adjustably inserted between said nut and Washer, and means .movably connected to said nut and adapted to engage a blade holder to which said handle connection may be applied to thereby lock the nut against rotation relative to the stud of said holder.

9. ,An adjustable handle connection for a safety razor blade holder formed with a threaded stud, comprising in combination a nut adaptedl tofscrewl on said stud,- a washer surrounding said nut and movable axially with respect thereto, a handle adj ustably inserted between said nut and washer, a sleeve surrounding said4 Washer and axially movable with respect to said nut, means preventing rotative movement of said sleeve and nut, said sleeve being adapted to engage a razor holder to Which said handle connectionv may be applied and thereby lock said nut agamst rotation relative to the stud of said holder.

10. An adjustab e handle connection for a safety razor bla e holder formed with a threaded stud, comprising in combination a nut adapted to screw on said stud, a Washer surrounding said nut and movable axially a handle adjustably inserted between said nut and washer, a sleeve surrounding said washer and axially movable with respect tosaid nut, means preventing rotative movement of said sleeve and nut, said sleeve-being adapted to engage a razor holder to lwhich said handle connection may be applied and thereby lock said nut against rotation relative to the stud of said holder, and yielding means opposing axial movement of said sleeve and` nut.

HARRY B. HARTMAN.

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