US2200186A

US2200186A - Dry shaving implement

Info

Publication number: US2200186A
Application number: US244825A
Authority: US
Inventors: Muros Joseph
Original assignee: Gillette Safety Razor Co
Current assignee: Gillette Co LLC
Priority date: 1938-12-09
Filing date: 1938-12-09
Publication date: 1940-05-07
Anticipated expiration: 1957-05-07

Description

May 7,' 1940. J. MuRos DRY sHAvING IMPLEMENT Filed Dec. 9. lesa lNvENToR mama M., 1, 19-10v UNITED I STATES v azoaiss nar snavmommnmmr Joseph Miu-os, Cambridge, Mass., assignor` to Gillette Safety Razor Company, Boston, Mass., a'eorporation of Delaware appuemen December 9, '1938, ser-m No. 244m;

This invention relates to shaving implements of the type employinga head or holder which is removable intact from .the body of the implement and which contains a movable cutter member that is readily disengaged from the head.

The object of the present invention is to re- .tain the cutter yieldingly within the head and prevent accidental displacement and loss when the head is removed from the'handle'of the implement for cleaning or for any other purpose. When the head is assembled in the implement in its operative position the position of the movable cutter is controlled by a connection with its operating mechanism and this mechanism also prevents the accidental release and loss of the cutter. However, when the head is remover from the handle of the implement, as it often is for purposes of cleaning, the'operating mechanism is disengaged from the cutter and in implements as heretofore-constructed the cutter is then free to slide out of the head and fall upon the floor or down the drain of the sink to the great annoyance of the user. This condition is aggravated by the fact that the cutter is usually a thln,4 fla't bar of small dimensions and is hard to find when once dropped or misplaced. Various mechanical expedients have been tried for retaining or limiting the movement of the cutter bar but these have not proved satisfactory because .of the small space available or because they impose an added load to the motor of the implement.

The present invention consists in a dry shaving implement having one or more of its steel head parts permanently magnetized in such manner that the cutter is magnetically retained in the head independently of its operating mechanism and in whatever position the head may bel placed. It is contemplated that the external part of the head in' which the stationary shearing teeth are formed or theV cutter bar or both of these parts may be magnetized according to the design of the shaving implement. In those implements wherein the outer member of the head is substantially U-shaped it is desirable to magnetize this part since the cutter. bar interposed between its two side portlons acts as a keeper completing the magnetic circuit and thus maintains the stationary member permanently and fully magnetized. In this or in other constructions it may be sufiicient to magnetize the' cutter bar only.

In all instances it will be noied, however, that on account of its small amplitude, the movement of the cutter bar takes place entirely within the magnetic iield of the head so that no additional side members li are risidly secured together by duty is imposed on the motor. On the other. hand, when the cutter bar is moved substantially out of mid position further movement is increasingly resisted and the weight of the cutter bar is insuflicient to disenga'ge it leven though the head 6 may be held with its major axis vertical. The pcssibilityof accidental displacement and loss of the cutter bar is thus obviated although the cutter bar may still be forceably removed at any time desired by the user.

It is within the scope of the invention to magnetize both the outer parts and the cutter parts of the implement and under these conditions a very desirablecondition may be realized, that is to say, the correct relation, end-for-end, of the cutter and the head may be insured, for if the attempt is made to insert the cutter wrong end first the polarity of the cutter is such as to cause it at once to be ejected by the repulsion of like poles. verse the cutter bar and insert it under conditions which tend to draw it into the head rather than to expel it.

These and other features of the invention will be best understood and appreciated from-the follow- 'illustrative purposes in an implement of the type disclosed in the co-pending application of Muros & Lewando, Serial No. 154,376, filed July 19, 1937. Only so'much of the implement is illustrated. as 40 is required for a complete understanding of the invention. It includes in its structure a handle l of HBakelite" or similar material which serves also as a casing for the motor of the implement. The end of the operating lever H oscillated by the motor is shown in Figs. 2 and 8 but the motor itself is not shown in the drawing since it forms no part of the invention.

The casing is'provided at its ends with transverse parallel flanges or ribs IZ forming a socljlet for the metallic head of the implement. The head comprises a pair of steel side members l3 each provided with an inwardly overhanging flange' ll,l slotted to provide stationaryshearing teeth. Tie .u

The user is thus warned that he must re- 2; A'

bolts lt passing through spacing blocks iii. The blocks IS together with the side walls of the members 13 and their flanges id form an elongated passage in which the cutter bar Elvis arranged for reciprocation. The cutter is fianged in its outer side and slotted to supply shearing teeth 58 which co-operate with the stationary teeth of the head. The inner face of the cutter I? is provided with a central notch to receive the outer end of the operating lever ii and vis further provided with two intermediate notches or depressions to receive the ends of spring plungers l which project yieldingly from casings 23 located in corresponding sockets in the handle lil. It will be understood that the function of the spring plungers 99 'i's toI hold the cutter i? pressed yieldingly outwardly'so that its teeth 98 make shearing engagement Witl'il the stationary teeth of the head. v

The spring plunger 69 and its casing 28 are assembled in a novel mannerparticularly adapting them for use in dry Shaving implements.

Each plunger is provided with an enlarged flat circular head located within the flanged outer end of the caslng and from the inner face of the head projects a short guide stud by which a coiled conipression spring is centered within the casing. The flanged end of the casing furnishes an opening of greater diameter than the plunger HS so that the latter may rock freely as the cutter reciprocates while the fiattened head of the plunger is always pressed yieldingly outward so that no Opening ever occurs into which the Shaving debris might find its way into the casing' Z.

In Figs. 1 and 2 the head is shown as secured in operative position' withinV its socket in the handle. In this position the cutter ll is engaged'both by the operating lever H and the spring plungers 09, so that it is positively prevented from passing endwise out of the passage in which it reciprocates in the head. It is necessary or convenient, however, frequently to release the head and remove the cutter il. The head ES and the cutter ll enclosed therein form a complete self-contained unit and when the head ls released it may he removed from the handle in rintact condition with the cutter therein. -When the head is released from its socket and moved outwardly with respect to the handle as shown in Fig. 3 both the operating lever i i and the spring plungers it are disengaged from their respective members 93 and the intermediate blocks 95. A

powerful permanent' magnet of approtely U-shaped cross-section is thus provided end between the sides of this is mounted the rectangular steel cutter bar i? which thus acts as a keeper to complete the path of the magnet circuit.

When the cutter l'l is in its operative' position it is entirely enclosed by the head and its operk ating amplitude of movement is not carried out of the magnetic field of the head. Consequently, the magnetism of the head .has little or no retarding effect upon the normal shearing Vstrake of the cutter. If the cutter is so small that it should be displaced to any substantial amount the magn'etic force of the head tends strongly vto arrest further movement and this is suiiicient to overcome the weight of the cutter and prevent it from dropping out of the head. In Fig. 3 the cutter is shown as displaced to the 'point at which its falling movement is magnetically arrested. Thus accidental displacement of the cutter is obviated although the user' may at anyy time forcibly overcome the magnetic attraction between the two members and so remove the cutter,

While I prefer to. magnetize the head, useful results may be secured by magnetizing the cutter alone or by magnetizing both the head and the cutter. In the latter case an additionalad- Vantage may be secured by imparting magnetism of opposite polarity to the two members when assembled in the proper relation. Under these conditions the cutter tends always 'to assume its normal mld-position when inserted with the proper end flrst while, if the attempt is made. to insert the wrong end of the cutter, the like polar-g ity of the parts tends to ejcct the cutter and so warn the user that the' parts are improperly assembled. This is important because the cutter lable steel head which is magnetized and vsubstantially U-shapcd in cross section, and a reciprocatory steel cutter contained within the head forming therewith a removable "self-contained unit and serving as a keeper between the sidcsof the magnetized head the cutter being removable from the head by endwise movement.

2. A dryshaving implement having a handle; a self-contained unit comprising a shearing head member enclosing a reciprocatory cutter member, mechanism within the handle operatively connected to said cutter member and positively Vliu'iiting its movement within the head member,

clamping means for holding the head member in- Vplace in the handle, said means being releasable to disengage the head. member for removal in intact condition as a unit with the enclosed cutter 99 member therein, one of said members being magnetizcd i to retain the cutter member when the said unit is so -removed from the handle.