US928733A - Mechanical pencil. - Google Patents

Description

E. BERGQUIST. MEGH'ANIGAL PENCIL. 1 ,Y APPLIOATIONHLED JAN.13,1909.

" Patented July 20, 1909.

'ploy for `being,- held (UYA entre ecrans enfrente EDWARD BERG-color, or New YORK, N. Y.,AAssieNoRfro EAGLE rENoiL COMPANY, or New YORK, N. Y.

No. 92eme.

Specification of Lettere Patent.

Application filed January 1 3, 1909. Serial No. @2,195.

To all fiotom'it may concern.;

Be it known that I, EDWARD BERGQUIST, ot' New `fork, county and State lrol New York, have invented a new and useful linprovement in ll'lechanical lencils, ot which the following is a, specification.

ll' v invention has to do with propelling pencils-and other so-called mechanical pencils in which thc lead is loose and movable in'the sheath or handle; and its object is to providein the handle a reservoir to contain asupply ot loose leads to replace, ii need loe, the lead'in the writing end of the pencil. l am of course aware that such a provision in a mechanical pencil isnot new, broadly considered. f1 l h'ly invention resides in the construction and arrangement ot the devices which l emthe purpose, it being my object to so hold the lends that they may be convenicntly reached whenever desired, while. at the Sametime so long the reservoir is closed they will be held therein motionless and without rattle or danger of breaking.

The main clnlracteristic ot' my a lougitiulinally movable, spring supported. springA yielding, bottom, whose normal position is such that the distance between itand the reservoir-cap or cover (whem the latter is iu place) will be less than thel length oil the leads t'or which thc reservoir is.intended, so that when the leads are placed in the reservoir the cap or cover, when applied, will press upon the ends o'tl the leads, the spring;l supported bottom yieldingto thisl pressure and adapting' itsclt' to the length ot the leads; the latter, when the cap is in its place, llirmly but with yielding pressure between the cap and bottom.

lu the accompanying Vdraw-ing, to which l shall now refer tor 4a better understalulingv ot my invention- Figure lis a sido elevation part ly in axial section of a mechanical pencil embodying my improvement in its preterrcd torni.' In this figure the parts are repref sented in the position they assume when the lead reservoir is closed. Fig. Q is a side elevation of the saine with the reservoir open. liig. 3 '1s a perspective View ot`thc reservoir cap or cover, looking at its inner tace. Fig. `rl

is a perspective view ot' the cork bottom of the reservoir and its supportimg spring, removed trom the reservoir. y

The pencil in the drawing is supposed to improve nient is that thel bottom ol the reservoir is be a propelling pencil of suitable type, the two portions A, B, of the pencil being rotatable with respect. toeneanother, as usual in pencils of this kind, for the purpose of protruding or withdrewin the lead. The tubular handle or sheath B is prolonged back beyond-the rear end of the portion A far enough to provide a chamber wherein the lead reservoir is formed.

The bottom of the reservoir is shown at e. lt longitudinally.' -movable in the sheath B, and is supported upon a lifrht spiral spring o which rests upon the head or closed rear end ol" the pert. A.l l prefer to make this bottom L of a cylindrical piece of cork,

which will peri-uit the sharpened ends of the pencils leads l) to slightly embed themselves therein when subjected to the pressure of the cap c. The spring Z1 is secured to the rock, as shown more clearly in Fig. 4. The position of the bottom a when lthe reservoir is uncovered is such that the depth of the reservior will he iess than the length of the leads for which it is intended, so that with the reservoir uncovered and the bottoni c relieved ot' pressure, the ends of the leads, as -shown in Fig. will project from the reservoir tar enough to enable any one of them to he readily pil-hed oui and removed trom the reservoir.

The reservoir may be closed. by a removable cap ot' any suitable construction. The cap c shown in the' drawing, is a cylindrical plug externally screw` threaded to engage the corrcspondinel)- internally screw threaded open end ot the reservoir, and its inner tace is preferably concave, and with taperingr` or converging; walls so that the ends of the leads will be gathered or hunched t3ogether and held in .said concavity when the cap is beingv screwed home. The endwise -pressiu'e ot` the ca p in this position upon the leadsl dcpresses the latter and causes them in turnto press upon the spring supported bottom o. which yields to said pressure as indicated in Fig. l.

The construction illustratedin the druivings embodies my invention in a simple, cheap and eilective torni. rlo torni the reservoir, they sheath or handle l is merely prolonged a suitable distance beyond the rear end-ot the front portion which contains the propeller moven'ient. The lmttom n, and its attached spring [2, arc inserted into this prolongation oi the sheath, the spring rest- The only other part require `both sheath B and cap c of hard rubber.

Having described my invention and the best way now known to me of carrying the same into practical effect, I state in conclusion that I do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied Without departure from the spirit of the invention; butl'Wl/iat I claim as new and desire to secure byLetters Patent isl. In a mechanical pencil, a reservoir for loose leads in the rear end of the sheath or handle, provided with a longitudinally movable yieldable spring supported bottom, and a removable cap adapted to force the leads against the bottoni, substantially as and for the purposes hereinbefore set forth.

2. In a mechanical lead pencil, a reservoir for loose leads in the rear end of the sheath or handle, having a longitudinally movable yieldable spring supported bottom, and a removable cap having a concave inner face formed With converging Walls, and adapted to force the leads against said bottom, sub- 4stantially as and for the purposes hereinbefore set forth.

3. A mechanical pencil comprising a propeller pencil proper A, B, the tubular sheath portion B prolonged beyond the rear end of the inner portion A to provide a reservoir for loose leads, a bottom for said reservoir consisting of a longitudinally movable plug aA and an attached spiral spring b, supporting the plug av and resting on the. rear end of Athe portion A, and the cap c yadapted to close the open end of the reservoir, and to bear upon thc ends of the loose leads therein, as and for the purposes hereinbe'rore set forth. 4

In testimony whereof I afiiX my signature in presence of two Witnesses.

EDWTARI) BERGQUIST.

. llVitnesses:

CLA ns WM. BOMAN, )scan ANninzsoN.

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