US2363608A

US2363608A - Safety razor

Info

Publication number: US2363608A
Application number: US519213A
Authority: US
Inventors: Muros Joseph
Original assignee: Gillette Safety Razor Co
Current assignee: Gillette Co LLC
Priority date: 1944-01-21
Filing date: 1944-01-21
Publication date: 1944-11-28
Anticipated expiration: 1961-11-28

Description

J. M U ROS SAFETY RAZRl Nov. 28, 1944.

Filed Jan. 2'1, 1944 INVENTOR. BY ix/ffm -mgw Patented Nov. 28, `1944 f, ""zgssasus SAFETY RAzon "t if JosephlinrosQCambridge, Mass., assignor to Gillette Safety Razor Company, Boston, `cfrrperation"of Delaware Mass., a

Appellation Jammer `194e seriall No. `519,213 l freetime torneo-tsl 'I'his invention relates to safetyfrazorsof `the type in which a4 thin flexibie blade shaped 1 and` supported for shaving lbetween; .vbladeeolanrpng t members.` The invention consistsmgimprovements facilitating the presentation to the rami* of fresh `sharp blades While each 1blade -is protected by an envelope or cover which it is desiredto remove only after the blade has been positively located in its shaving position.:k

`The shaving edge of a thinlsafety razor Iblade is brought to suchV 'a high degree of `neness that it is extremely delicatenand litskeenness-isflikely to be destroyedif the? edgeisfaccidentally `drawn across any part of therazor or la blade magazine or even the blade Wrapperi preparatory to ,shave ing. Great eare-andpconsiderable skill is required ordinarilyon the part of the nser to extract such p a sharp blade from its' wrapperiandpresentit safely in its shavingposition Without, damage to its edge. The present invention deals Withblades of a type :which may beprotectedqat theptirne orpiace ofymanufacture byrbeingvenclosed in a paper cover or wrapper. This Wrapper overlaps and safeguards the sharp edgeor edges -of the razor blade and mustube removed .tornake the t edge accessibleffor shaving.`y We contemplate a,

safety razor so organized that vthe Wrapped blade :hay be `delivered directly thereto: in its `final` shaving position .and temporarily held asfthus positioned while theuserhasonlyM to strip thel wrapperfrom the `bladearid withdraw it from the. razor, all this being `effectedl Withoutf Adangerdand even without the possibilitylof touching the keen` cutting edge of the blade,` e An object ofthe invention is to provide aijconipact `structure withoutinoving partswhichmay4 conveniently be einbodiedinsafety razors loi Well-- known" commercial jtypesifor effecting `these de# sirable results.` M'Io this end a featureofthe ini vention comprises a detent orretainer on one of the blade-clamp`ing` Iinernbers having an inclined face arranged "tofmeettheon-coming end of a.

flexible blade and ride ,up upon it `under spring` 'pressureas the bladeis inserted. When the blade has once beenmoved fully intojits4 shaving `positiont automaticaliyilsprings yinto a flat condi` tion' `and simultaneously" thedetentgengages anA aperture provided for that purposefin the blade.

' `With the `blade thus ljield the user has QllYto strip the` protective cover by pullingitt` endwise whereupon the blade niay'jbe clarnpedr in; final position for shaving,` either flat orinafcondition of transverse curvature depending upon'fthe type of razor-'in which'the'inventionisembodied: i

" An important `feature of* the invntionconsists in `a detent fixed to one of the blade-clamping members and having an inclined bladengaging surface so disposed in therazor that the blade-V clamping members aretemporariiy separated by a prying action of the detentin cooperation with l lowing description of a preferred embodiment thereof, selectedfor purposes of illustrationA and shown in the accompanying drawing, in which;

Fig.: l is a. View in perspective of the complete razor showinga blade being `inserted with its protective cover in place; l l

Fig.` 2 is a corersponding view in longitudinal i section and on an enlarged scale; y t y l Fig, 3 is a view inxzperspective ofthe-cap as seen from beneath; and 1 l 1` l t Fig. 4 is a pianrview: of a blade inposition on thecap member ofrthe razor. l l

The razor herein shown is designed 'to `employ interchangeable blades of the type rbest shown in Figsi. `The blade I0 isgenerallylrectangular inloutline having corner recesses which define elongatedunsharpened end-portions and is sharpened at both longitudinal edges. It is ablade of the open-ended type, that is to say, it has'a cen-f tra-l longitudinal `slot Il openingthroug'h one endof `the blade, the other endbeing solid. 'Ihe the shoulders at the left-hand end of the blade l as seen in 1 and having tabs which are folded inwardly over the cover at the `right-hand end of the blade, The cover is folded so that 4the sharp edgesof meende do not contact `the material ofthe cover. "l t l v. "Therazor herein shown includes inits struc#- ture a, handle, guardand cap. The cap lliv is reotangular in outline` and slightly narrower than the blade. It has an inner concave `blade-erigag;

ing face from whichvprojectsia `central blade-A locating rib l1; ,The Jrib U is ofeniferm height y or "depth except in a limited section I5 at each end which ishigher or deeper than the bodyof therib. ANear one end of the rib"|1 is provided a stationary detent or lugf consisting of tw'osin'ii-` to receive with aisliding fit 2,363,608 if L.

within the razor and fully in its shaving position as suggested in Fig. 4. Its sharp edges have not touched or been touched by any object and so retain their initial keenness. Complete and final clamping of the' blade for shaving is inI no way i interfered with and when the user has rotated lugs 2!) which t with clearance into corresponding notches of the blade as shown in Fig. 4. Ther other end of the capis cut away centrally to provide a wide shallow finger recess 2| for convenience in presenting and removingv abladefromw the razor.

The guard corresponds in outline to the cap I" I except that itis substantially wider andfit ispro# Y vided with a convex blade-supporting face ,whichw` when a blade is fully clamped in shavin`g"'posi` tion, cooperates with'rthe cap in imparting trans-j verse curvature thereto. The guard is provided with a longitudinal recess 26 to receive the bladelocating rib I1fofY the cap and is connected rigidly to the upper end of thehandle 21. At either end of the recess 26 is provided a short slot 24 shaped thehigher end sections I5 of the rib I1. x i

The handle 21 is bored to receive the stem I9 of the cap andV chambered tov receive a corn- `[pression spring 28 which bears at its lower end against the inner end of a cylindrical nut 29 having threadedengagement with the lower end of the spindle I9. Astoplscrew 30 in the lower l end of the spindle prevents by its head accidental disengagement of the parts. The nut 29 is shouldered as shown to bear. againstthe 'end ofthe barrel 21 so that by turning the nut 29 in a clockwise directionthe stem I9 may be drawn positively downwardly within the barrel and a positive clamping pressurecreated between the cap and guard. On the other hand, when the nut 29 is rotated reversely clearance-is provided under the head of the screw 3'8 and the' spindle I9 may then be elevated against the compression of the spring 28 so as to separate the cap from the guard temporarily rand thus permit interchange of blades. To causesuch separation the user may hold stationary the upper portion 21 of the handle and push-up on the tubular nut 38, as suggested in Fig. 2. The spring 28'tends at a-ll times to move the cap and guard toward each other. I l In Fig. 2' the user is represented as A,having slightly separated the cap andfguard against the action of the `spring 28 by the act of inserting the *projected blade from the! right-hand end of the razor. 4The open end of the blade is presented in advance, the side portions ofthefblade pass.- ing on each side of the rib I1.,j When the side portions of rthe blade reach the. inclined faces of the detent I8 they react against the detent to separate the cap.' still further from; the 'guard as shown in Fig. 2. This :prying actioncontinues asv the blade is advanced until the slot enlargement or aperture I2` oflthe'blad'e registers' with the detent sections I8. When this occursthe resiliency ofthe blade snaps it into substantially. flat condition with the detent 1 8 passing freely through the enlargement I2. The blade is thus anchored against longitudinal movement in the razor and, while it is so held', the user may strip v the cover I4 by merelyifpulling it tothe right oifthe` blade.l The bare-blade now, lies safely the nut 29 to clamp the blade in its position he may proceed with the shaving operation.

As already noted, the spring 2,8 tends at all times to move the cap and guard together in a yielding manner. The cap may be lifted by the Wedging action of a blade riding up upon the inclined end faces of the detent sections I8, or

, the user may lift it by lpressing upwardly on the'` i nut 29 when the latter has been unscrewed on the stem I9 enough to afford clearance. When it is desired to remove a used blade the user must flift the cap in this `manner suiiciently` to free 24 of the guard, with the result that the proper alignment of the razor tained.

While the corner lugs `20 of the capdo not ordinarily engage the blade I 0 at any time, they do serve as a safeguard to limit the spreading that might otherwise occur as a result of pulling the blade against the detent tective cover. The clearance between the lugs 28 and the end of the blade IU isy always less than the width of the sections of the detent I8 on each side of the rib I1. Therefore, the side portions of the blade can never spread suiciently to slip past the detent in the operation 'of removing the blade cover.

This application is a continuation-impart of my application, Serial No.497,572, led August 6, 1943.

Having thus disclosed by invention and described one illustrative embodiment thereof, I claim as new and desire to secure by Letters Patent: 1. A safety razor having cooperating bladeclamping members, blade-locating means on one of said blade-clamping members, and a detent located on. and immovable with respect to the same memberand shapedfor engagement by a flexible apertured blade sentedendwise between the clamping members, said detent `contacting the until its aperture has vbeen advanced to register with the detent and then entering the aperture and holding the blade against withdrawal.v

2."A safety` razor having `cooperating `bladeclampingmembers, a blade-locating rib extending from one toward the other, and adetent fixed to onev of the blade-clamping membersnearone end of the rib with an' inclinedblade-engaging face where it may` first contact the surface and then enter a flexible apertured blade presented endwise between said` blade-clamping members. 3. A safety razor having cooperating bladeelements is always mainclamping members one of which has a longiin remo-ving its eprowhen the latter is presurface of the blade `by a. cooperating detent.

d d 2,863,608 to move them together, and an interposed detent on one member near one end of said members having a bevelled face forfengaging the end of an on-coming blade pushed endwise'between` said members and temporarily separating them prying action of the blade and i 5. A safety razor having cap and guard members, `ablade-loeating rib on the cap` and a fixed detent near one end ofthe rib having an oblique end face, a spring pressing said members together, a blade with an open-ended `longitudinal arate fthe said blade-shaping members, and a n spring urgingsaid members together inopposit t tion to such wedging action. i

slot tting said rib and having an enlargement p near one end tting said detent,iandimeans for temporarily separating said members in opposition to the action of said spring for' the `removal of a blade.

` 6. A safety razor having cooperating blade-l t shaping members, a straight blade-locating `rib ,projectingfrom one of said members, azdetent of less height than saidrib locatedbetween the ends of the rib and `having a top face inclined with respect to the edge of the rib, whereby an open end blade "pushed endwise along the rib maybe displaced by wedging action and thus sep-` `'LA safety razor having cooperatinghbladeclamping members, a blade-locating rib eXtending from one member toward the other, a detent fixed upon said rib, having a blade-engaging face and beingshaped to enter an aperture in a flexible open-end blade presented endwisebe-` tween" said blade-clamping members, and spaced lugs on one of said members limiting possible spreading of the blade to an amountless than the width of said detent.

8. A safety razor having a guard, and a cap with :a blade-locating rib and a yfixed. detent wider than the rib, in combination with an openend, apertured blade having sharpened side portions separated by a medial slot and being tted upon saidrib and detent, and spaced lugs `on the cap normally clearing the ends of the blade and located to prevent spreading of `the side portion of the blade suiiciently to release the blade from i said detent. l n JOSEPH `MUROS.