US1987514A - Razor - Google Patents

Description

Jan. 8, 1935. M. M MAUslCl-l I 1,987,514

RAZOR Filed Jan. l2, 1933 m j 10 4INVENTOR. 1a Nemen/Menara' 9 gy 20 %x 1 6 ToRNEYs.

Patented Jan. 8, 1935 UNITA-ED srrss PATENT o.1?aloE Marko M. Marusich, Clairton, Pa., assigner of one-half to J aok Vulich, Chioag'oflll.

Appcation January 12,- 1933,`7S`eria1 No. v651,380

Claims. l (Cl. 30-12) blade section which may be detachably removed' from a permanent back and be replaced by an# other blade section.

A further object of the'invention is-the production of a razor having a detachable blade portion which may bev removedand replaced in a permanent holder by'a simple swinging movement of the blade with respect tothe holder or permanent bacio-thus avoiding any necessity of` longitudinal sliding Vnfiovement of the blade in' the taking apart 'and assembling operation.

isectionfpresehtingv a continuity of-side surfaces and ari-improved bladefastening means cooperatingwith the holderrand engaging on both sides ofafportion of the Yblade/to rmly-posi'tion'the same Within the'holder against possibilityof accidental displacement When vigorously manipulated by a user in stropp'ing ori otheroperati-'ons.`

This application is a continuation in part of subject matter included in the copending appli-'1 cation Serial No. 507,692, led January A9, 1931;'

The razor structure embodies generally a longitudinally slotted vblade holder or permanent" back having a removable blade section with a reduced shank portion seated, when assembled With the' holder, against longitudinal movement, with 4 *the reduced shank portion Within the slotted drawing forming a part of this specification. In the drawing1 I Fig.A 1 is a side elevation serted blade being shown in dotted lines.

-Fig. 2 isan enlargedvperspectve viewbro'ken away of fthe? holder z. showing' the iorgaization "therewithxofrtherloekingrmeans.

Fig. 3 is a longitudinalzsectional View of Athe holderand 'blade' positioned inthe holder.

Fig. 4 is a Across sectional ViewV ofthe holder* and blade taken on line 4-4lo'f'aFiggL Fig. 5 is an lelevaticnnal vievv4 of the blade member. z f' Fig. 6 is across-sectional"viewltakenon the lined- 6V of Fig. 1. a 1

While straight' rrazors vvliavin'g la 'Veletach'ablev blade section have :been-previouslyzmadeylsuch' i structures have been :proven unsatisfactory and unsuitable for Y practical '.use,y `because of .the Avfact that blade sections. have either been hooked .over the permanent back or fastened therein or there? to by fasteningrneans capable of being facci'den-e tally dislodged or' which destroy'. the razor' balance and interfere with operation of fthe razor as an ordinary yrazor .could. be .used.`.v It viis? irri-` perative, due to the frequent vigorous manipulation of a. straigntvra'zor' in'stropping,...honing, grinding, and use, thatutlllere` be' no portions extending beyond Ithe sidefsurfac'e's of thefblade" A- further object of kthe invention is the pro- I vision of a razor comprising a holder and blade-n holder, otherwise theblade may beaccidentallyl loosened '.'frornxA its holderv resultingiin'vdamage or injury.v Straight .razorsarealm'ost universally used by barbersandbec'ome subjected to vigorous lman'iplilation iii-use! and ingrndi'ng fre I quently the temper ofv'the'fblade is-destroye'd,l necessitating lthe disrzardl` `of 'the'entire razor structurep The applicants-il inventionfobviates the necessity ofA discarding? other "thari- -the blade portion" when `temper is fdestroyed or `the icute ting edge becomes otheriifise'-V unuseful `by"b`real age or'the like"` and- Apresents alr'azor's'triicturef which has V.the l same balance vand identicalappearance found -in a-r'cohventional'straight'irazor.- Referringparticularly tolthe. drawing, the razor of the inventionincludes'fa perma'nent.` meta'l `back or bladey holder member l", kpivoted in.'alconveni tionalrazor handle 2,v so thatithebackfmay be`v folded Within thesides ofthe handle' in thefrnane" ner orfani-ordinary razorflrfliheiback ory holder may be Inadelf-rorri anysuiiable liard-fm'etalvandis-.reurid'ed at`I thev top andi providedi with? aflatv s'ur'- face onthe under side extending-throughout a' portion'- ofk its length, providingla seating ysurface for la' detachable bladeiportion!lfrereinefterdeL scr-'rbedf j Thelback or lholderportion.'has aa cen- -1 trallong'itudinal: 's1ot`3 entering thou-nder. vsidel of of a razor 1n accorde ance-With the invention, the position of the inthe-holder extending'ifromia' poin't adjacent thef pivoted end of .the` holder'through itsifree'iend. The slotfwhi'ch.is.designed to receivej andiaseat a portion of vvaff-blade;sti-'i1'cturfe'i isv closed.- at lthe free end of thev4 holder by angangular'metaliinsert 4 lying ,flush with'the endJand, lower-ifacetof 'the holder. The insert is fixed in the slot by a pin or rivet 4 passing through the depending side portions of the holder and the insert. The insert has one of its sides upwardly inclined, within the holder, toward the free end to provide an overhang for the slot and a seat for an angular projection on a blade to be accommodated within the holder. The slot is of uniform depth in the holder except at the rear or endopposite the insert Where the bottom Wall is curved towardthe surface of the holder to define a seat for a blade portion which when inserted may be swung into position to be locked Within the holder.

While different metals may be employed for the*` blade holder just described, the blade portion 5 of the razor is made from razor steel, but due to its novel structural characteristics is hardened only throughout a portion "of Iits width, the portion of the blade engaging the holder being unhardened. The blade portion 5 has its sides hollow ground, as at 6, to present an` extremelythin cross sectional area throughout the cutting portion of the blade. This blade is provided with a central longitudinally extending reduced shank 7 which is so proportioned as to be received within the slot formed in the holder to provide a snug fit. Thecentral shank portionof the blade 7 defines longitudinally extending shoulders 8 on opposite sides of the blade which closely engage the longitudinal bearing surfaces on each side of the slot on the under side of the permanent back or holder. This engagement, when the blade is inserted within the holder, is such that the joint formed between'the holderand blade presents substantially a continuity of surfaces with respect to the sides of the blade and the holder portion which on its opposite sides is concaved to conform to the general shape of an ordinary razor blade.

The blade portion is provided in the reduced shank portion adjacent the forward end with an undercut forming the angular lextension 9 which fits behind the insert 4 overhanging the forward end of theV slot permitting the blade to be swung into a position with the shank snugly engagingv in theslot formed in the holderf. The opposite or rear end of the shank is extended at l0 beyond the mainv cutting -portion of the blade and is rounded to cooperate with the slotted holder and the locking means hereinafter described. The extension 10 beyond the end of rthe main portion of the bladeis'somewhat wider than the longitudinally-extending portion of the shank above the main blade portion and the longitudinally extendingshoulders joinside shoulders 11 arranged to cooperate with similar shoulder portions 12 of the holder Yso that when in the assembled position in the holder, the blade will be fixed between two longitudinally disposed points against longitudinal movement withrespect to the permanent back orholder.

The vpermanent back 'm provided with concave side surfaces throughout substantially the extent of the main blade portion and adjacent the rear end .of said bladev portion is slightly widened, defining the'shouldersV 12 for seating the shoulder portions of the blade. The permanent back is cut away adjacent theblade holder portion defining aA recess 13 having a curved rear end wall 14. The recess13 extends forwardly toa point beyond the rear end ofthe longitudinally extending slot in the holder so that a smallportion of the extension 10 of the blade shankwill project slightly above the bottom` of the forward end? of the recess. A flat latch` member or spring lconformsin shape to the recess 13 and is pvotally fixed substantially at its center in the cut away portion by a suitable pin or rivet 17 passing transversely through the holder. ber is biased toward the permanent back and may be swung laterally to and from its registering position in the cut away portion of the back into and out of contact with the shank extension and end of the blade. vTo facilitate this operation, the side of the holder is recessed at 18 to permit insertion of the finger nail of a user to slightly lift the end of the latch member, and the forward end of the latch has a depending side flange 19 normally seated flush with the holder in a side recess 20 in the holder. The end of the latch spring is provided centrally on the lower side with a slot or depression 21 defining side shoulders 21 and is designed to engage the curved extending edge of the blade shank extension 10 exposed in the forward end of the recess formed by the cut away portion to firmly lock the blade in position in the holder.

Where a blade is within the holder, the latch spring lies within the recess 13 to form a continuity of the surfaces of the permanent back or holder minimizing the chance of accidental dislodgment of the latch to release a blade but such accidental release is further positively prevented by Athe central pivoting of the latch spring which occupies a position in which the fingers normally grasp the razor for stropping and honing purposes. In the arrangement shown,A the finger pressure will` fall on both sides of the pivot pin tending to hold the latch in position. The depending fiange 19 affords a further safe guard.

. From the structure described, it will be observed that the fiattened lower surfaces and the vertical shoulders of the holder cooperate with the 1ongitudinally extending and vertical shoulders of the blade to form a firm seating engagement,

which, coupled with the snug fit of the shank portion and its engagement forward, results in a very rigid structure firmly held in position by the locking means. ,c

To insert a blade section in the permanent back, it is only necessary to engage the angular projection of the blade shank with the portion overlying the forward end of the slot, whereupon` the blade may be swung upwardly into the holder with the end of the shank extension exposed' in the locking recess. The leaf spring locking means is pushed laterally by means of the depending flange into registry with the cut away portion of the holder to engage the edge of the shank extension in the depression in the spring. In moving the spring into engagement with the blade extension the spring flexes in passing the blade and automatically seats thereon when the slot or depression is above the edge of the shank extension. To remove the blade section the spring is slightly lifted and swung to the side in which' feature is kobvious when considering the ordinary.

use of the article. .The (construction hereinbefore described affords all. of the advantages of a straight rarer` and obviates the disadvantagesoflocking means The forward end of the latch memwhich might be accidentally released and the entire structure lends itself to economical manufacture and the possibility of using different metals for the permanent back or holder member and the blades. Hitherto it has been necessary to use in straight razors, razor steel throughout, and such steel is expensive and when accidentally dropped any damage to the fragile edge of the razor has necessitated replacing the entire blade. In this construction, a permanent back is supplied which may accommodate either a round-nose blade or a sharp-cornered blade, as the user desires. The advantages of the construction reside in the permanency of the fastening means, maintaining the identical balance of a conventional straight razor, and the manner of mounting the blade shank completely within the holder to provide no extensions which might be caught by the hands of the user or which could receive and hold dirt.

I claim:

1. In a razor, a permanent back or blade holder having a series of stepped longitudinally extending iat bottom surfaces defining vertical shoulders therebetween and a longitudinal slot extending inwardly of the holder and throughout one of the stepped portions and into an adjacent stepped portion of the holder, an insert flush with the surfaces of the holder overlying and clos.. ing the slot at one end of the holder and forming a seat for an extension on a blade member, a detachable blade having a reduced longitudinally extending shank for engagement within the longitudinal slot of the holder, one end of the shank being undercut to seat behind the insert and the other end of the shank being extended beyond the blade portion, said reduced shank portion dening oppositely disposed longitudinally extending horizontal shoulders for seating engagement with the bottom of the holder and vertically disposed shoulders for cooperation with the vertical shoulders on the holder defined by the stepped portion, and a spring latch coinciding with one of the stepped portions and pivotally mounted. at substantially its center whereby it may be swung into and out of engagement with the shank extension and the end of the blade portion engaging the vertical shoulders.

2. As a new article of manufacture, a razor blade hardened throughout its length but through only a portion of its width, and having a reduced longitudinally extending shank portion longer than the main blade portion dening longitudinally extending shoulders terminating in vertical shoulders on opposite sides of the blade, said shank portion having one end undercut to define an angular extension and the other end extended beyond the main blade portion and slightly below the longitudinally extending shoulders.

3. In a razor, a blade holder having a longitudinal recess intermediate its ends defining an angularly disposed shoulder at one end, shoulders formed on the holder adjacent the opposite end of the recess on opposite sides of the recess and extending upwardly from the bottom'of the recess to form stepped portions on the holder, a blade for cooperation with the holder having a longitudinally extending shank terminating in an angularly disposed shoulder for cooperation with the shoulder defined by the recess, said blade also having shoulders formed at the opposite end of the blade for cooperation with the shoulders on the holder formed between the stepped portions of the holder, and means for forcing` the end of the shank and the shoulders on the blade into engagement with the shoulders on the holder respectively whereby the blade is compressed in position between the end of the recess and the shoulders formed by the stepped portions of the holder.

4. In a razor, a blade holder having a longitudinal recess intermediate its ends defining an angularly disposed shoulder at one end, shoulders formed on the holder adjacent the opposite end of the recess on opposite sides of the recess and extending upwardly from the bottom of the recess to form stepped portions on the holder, a blade for cooperation with the holder having a longitudinally extending shank terminating in an angularly disposed shoulder for cooperation with the shoulder dened by the recess, said blade also having shoulders formed at the opposite end of the blade for cooperation with the shoulders on the holder formed between the stepped portions of the holder, and a spring latch member pivoted substantially at its center on the holder forengaging and forcing the end of the shank and the shoulders on the blade into engagement with the shoulders on the holder respectively whereby the blade is compressed in position between the end of the recess and the shoulders formed by the stepped portions of the holder.

5. As a new article of manufacture, a cutting blade for a razor having a reduced shank portion defining longitudinally extending shoulders joining vertical shoulder portions on opposite sides of the blade, said shank portion having one end short of the end of the blade and undercut to dene an angular extension and the other end rounded and extending beyond the main blade portion and having a flat shoulder slightly below the longitudinally extending shoulders.

MARKO M. MARUSICH.

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