US2043837A - Safety razor - Google Patents

Description

June 9, 1936. J, MUROS 2,043,837

SAFETY RAZOR Patented June 9, 1936 PATENT OFFICE SAFETY RAZOR.l

Joseph Muros, Belmont, Mass., assignor to Gillette Safety Razor Company, Boston, VMass., a corporation of Delaware Application October 1, 1935, Serial No. 43,065

6 Claims.

'I'his invention relates to safety razors of the type employing a sectional cap in combination with a guard or other blade-supporting member bodily movable with respect to the cap sections to ex and clamp a blade in position for shaving. Examples of such razors are to be found in U. S. Patent No. 1,922,072,` and in my own prior Patent No. 1,992,038. l

'I'he object of the present invention is to simpli- V fy the mechanism for swinging the cap sections to and from their closed position and for moving the blade-supporting member to flex and clamp the blade. As herein shown, the cap sections are pivotally mounted upon the handle member by supporting arms and a guard is provided having notches arranged to engage arms of the cap sections and lock them in closed cap position while the blade-ilexing or blade-releasing operations are being eiected, that is to say, the cap sections 2O are positively locked against pivotal movement duringv the blade-exing and blade-releasing movements of the guard. This insures an even and normal pressure of engagement when the blade is exed and a straight line movement of separation of the parts when the blade is `released, thus'a'voiding damage to the cutting edge of the' blade .and facilitating the manipulation of the razor by the user. A characteristic feature of my invention consists in providing the cap section arms with angularly disposed tail pieces through which is effected the opening movement of the cap sections after the guard has been moved a predetermined distance away from the closed cap sections and thus completely released the blade from flexing pressure.

These and other features of the invention will be best understood and appreciated from the following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawing, in which:-

Fig. 1 is a view in perspective and on an enlarged scale of the razor in closed condition;

Fig. 2 is a view of the razor in vertical crosssection;

Fig. 3 is a plan view of the razor head in open condition, with portions broken away;

Fig. 4 is a view of the razor head inY vertical cross-section showing the cap sections closed and the guard separated therefrom;

Fig. 5 is an end view of the razor head in open condition; and

Fig. 6 is a view of the razor head in vertical cross-section corresponding to Fig. 3.

In the preferred embodiment of the present invention the guard ID is utilized as a blade-supporting member for flexing the blade and clamping it in shaving position. The guard I0 is constructed of heavy sheet metal and provided along its longitudinal edges with spaced curved guard teeth I I of the usual construction. The guard is formed by die-pressing or moulding a single piece blank and is provided with notches I2 adjacent to each corner, centrally disposed notches I3 in each end and a centrally threaded stem I4. It is also provided with la pair of diamond-shaped apertures for the reception of guide pins I8 of similar shape which project upwardly from the handle member.

The threaded stem I4 is received within an internal threaded cylindrical nut I5 and the nut is received within an opening in the handle mem-V ber I6 and journaled at its lower end upon .a cylindrical boss I1 formed from the material of the handle member and extending upwardly into the opening for the nut. The upper end of the opening in the handle member I6 has portions which project above the end of the nut I5 and with which the nut reacts when turned to lower the threaded stern I4 and the guard I0.

-The handle member I6 is provided with outwardly extending brackets I 9 to which are rigidly secured the transverse arms 20 which lie beyond the ends of the movable guard I0. Co-operating cap sections 2l are pivotally mounted upon' the ends of th'e' transverse arms 20'by means of arms 22 which extend vertically and downwardly when the cap sections are closed, as shown in Figs. 2 .and 4, and horizontally and inwardly when the cap sections are opened, as shown in Figs. 3 and 5. Each of the arms 22 is provided with an inwardly extending tail piece 23 each being disposed at about with respect to its associated arm 22.

It will be seen that the central notches I3 of the guard register with the brackets I9 of the handle member and that the corner notches I2 t about the cap section arms 22 when the latter are vertically disposed in closed cap position. Thus the guard I ll is effective to lock the cap sections positively in closed position except when the guard is moved downwardly to its lowermost position, as shown in Fig. 5. Under these conditions the pivot points of connection between the arms 22 and the transverse arms 20 are located above the surface of the guard, so that the cap sections may be swung downwardly as shown in Fig. 5.

The blade 24 employed with the razor above described is provided with corner notches which clear the arms 22 of the cap sections and with diamond-shaped openings fitting the guide pins the ends of the cap sections.

open the cap sections I8. The cornerY notches define elongated centrally disposed end portions which project beyond Assuming that the nut I5 has beenV turned to elevate theguard I0 Vinto blade-flexing position,

as shown in Fig: 2 and `that the user `desires to for replacing Ythe blade or cleaning the razor,he has thenonly to turn the nut I5 toward the left, as seen in Fig. 2, whereupon the nut, reacting 'against the projecting .portions of the Vhandle I6, will move the guard I0 verticallyA downwardly Vinto Vthe position shownV infFig.'4,

meanwhile .maintaining Vthe cap sectionslocked in closed position.A When the guard I0 reaches Ythe position shown in Y f 4 p fof the nut in the samedirection will further lower the guard I0 causing it simultaneously to engagel V'the tailV piece 23 of the cap section arms and to )swing the cap sections outwardly into the ,posi-f tion shown in Fig. 5the arms 22 meanwhile pass` Fig. 4 further movement ing upwardly andv out ofthe notches I2 of the guard, thus unlocking the cap' sections-and leavingV them free for pivotal'movement." The bladeV 24; isV now fully exposed for removal, and'may be conveniently Y replaced if desired. When it ,is blade the nut I5 Vis turned in the'opposite direction whereupon the `shoulders of the guard Il) adjacent to the Vnotch-l2 engage the undersideY of the cap section arms 22V and swing upwardly the arms Vwith/: the cap sections into closed position as Y Y "shownin Fig. 4. VThe Ycap sections are thusiagain Y Vtion,' therelore, isof particular advantage andV Vsecuring a light-acting ,and quick moving safety razor, characteristics much Vappreciated'b'y the locked Vin, closed position and furtherupwardl movement of the guardto effect the blade-flexing operation ensueswith the cap sections locked in position.

In win be notedthat theefreetive length ofthe tail'piece's 23is much shorterithan that of the 4cap section arms l i ment of the tail ,piecesunder the actuation of the 22 so that a relatively short *move-4 guard IIJ fcauses afgreatly increased 'and faster movement of the cap sections. This construcuser. Y Y

g Having thus described my invention what Vl claim as new and desire to securevbyLetters Pat- Y ent isz- VLA safety razor having,rin combination, a

handle having outwardly extending brackets, a cross armsecured to each bracket, cap sections pivotally mounted at the outer rends of the cross arms, and a guard movably mounted in the razor and connected with the cap sections so as to swing them toward or from each other inits movement. Y

2. A safety razor having, in combination, pivot-` ally mounted cap sections having downwardly ex- Y tending arms the cap sections are closed, and a guard apertured toreceive said arms and arranged to be moved which are verticallyk disposed when vertically a predetermined'distance without af l jfecting. the position ofthe sections a'nd 'then to swing them into open position in Vits further movement.

ally mounted cap sections having arms which are Vsubstantially vertically disposed when'the cap sectionsare closed, a guard apertured toreceive said arms and to move up and down thereon for a predetermined distance to clamp'or unclamp a blade without affectingisaid cap sections, and means operative to swing the cap sections at the conclusion of Asuch'predetermined movement of the guard. K j Y -f y. Y 4 .1A safety. razor having, in combination, pivotally mounted cap Vsections'having downwardly extending arms, a guard apertured toreceive'said arms, and anangular projection on each armVV adapted to be engaged by the guard'afteriithas Y Y 15 3. A safetyV razor having, in combination, pivot-V made a predetermined movement out of blade clamping position.

5. VA safety razor hav1ng,in combination, a'support,- cap sections with downwardly extending armsipivotedjto vthe support, a guard with :ipertures spaced to lock said arms in vertical position with thecap sections positively, closed, and means for moving the guard to carry it belowthe pivot pointsA of the arms and so unlock them for separating movement. 6. A safety razor having, in combination, a sup-V Vport,'cap sections pivotally mounted -on said supy port and, when in open position, having inwardly extending arms-each provided with -an angular

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