US1839897A - Mechanical pencil - Google Patents

Description

.17 z. SAVOIE MECHANICAL PENCIL Jan. 5, 1932.

Filed Jan. 24, 1931 Patented Jan. 5, 1932 5 UNITED STATE PATEN OFFIC :rosnrn z. savorn, or rnovInENcE, nnonn ISLAND, nssIGNoR'ro 'rnnonoan w. ros'rnn a. Bao. (10., or 'rnovrnnncn, RHQIDE ISLAND 1 .MEQHANIGAL ream j 7 Application filed January 24, 1931. Serial No. 510,948.

This invention relates to mechanical penoils, and its primary object is top'rovidea pencil wherein the, lead is releasablyheld against movement and-upon release of the holding means is automatically fed out of the casing byslidingxthereof; a

Further objects are to provide feeding means of the above type which is released by a mere and single depressin'g'action by' use I I position, the spring jaws 19 act as clutches to of a finger of the operator whereby the usual feeding by rotating the cap is eliminated; to provide a'pencil which is simple in construction and also exceedingly simple and eflicient inoperation, and which at the same time re tains the general outlineandappearanceof mechanical pencils in common usagew" In the drawings 9 Figure 1 is a side elevation of th-e inven-r tion Figure 2 is a section taken on line 22 of,

Figure 1;

Figure 3 is a me land I e t Figure 4 isa section taken on line 4-'4 of Figurel. W Referring to the drawings more in detail, 1 represents the hollow outer metal casing of section on line 33 of Figthe pencil, having the usualtapered point 2.

A cap 3 is provided with pins orprojections 4 which engage in a bead 5 and normally hold the cap in place. The cap may-be removed by rotating ituntil the pins 4-register with bead outlets 5, when thecap maybe pulled away from-the pencil; r V

Aninner shell 6 fits in the upper end of the casing 1 and has a closed upper end 7 which abuts against the cap 3, and an open lower end 8. Adjacent said lower end 8 are two annular flanges 9 and 10 which slidably engage the casing 1. In the clo-sed'end 7 of the inner shell 6 is a coil spring 11 which exerts downward pressure upon a rod 12 by engagement with a disk 13 fixed on said rod 12. The rod 12 extends downwardly through a sleeve 14 upper end of the lead 17 abutting against the lower end of the rod'12. By means of the rod 12 the downward force of the spring 11 is or. clutch members 19, which latter are curved or bowed as shown, and which abut against the'tapered part of the casing lat the points 20. I

When the pencil is in the normal or writing holdithe lead against movement.

- The. cup-shaped member 15 is subjected to the downward force of asecond coil spring 22 which abuts at its upper end against the .flange9 of the inner shell 6. The downward force exerted by the spring 22 urges the spring jaws. 19 firmly against the tapered part 2 of the casing 1, as shown at 20, and this causes the ends 21 of the jaws 19 to clutch the lead 17 and hold same against movement. Adjacent: the tapered part 2 of the outer casing 1 is'a notch 2 formed by bending inwardly a portion of the casing 1. Immediately above the notch 2' is a cut-out portion 23 to providea space wherein the finger may movewhen releasingtheclutch.- The member 15 isdepressed at 24 to correspond to the notch 2 as shown in Figure?) to allow the cup-shaped member 15 to slide downwardly under the action of theispring 22 until arrested bythe upper edge ofthe wall, resultant from the notch 2 abutting the finger engaging Wall or bottom 1670f the member 15.

It-will be seen that the spaceenclosed by the casing 1, the flange 10, the inner shell 6, and the cap 3 provides a circular chamber or magazine for carrying a supply of leads. flnop eration a'finger is inserted inthe notch 2 and engaged with the wall16 of'the member-l5 and the latter is then'forced upwardly against the action of the spring 22.

communicatedto the lead 17 to feed the latthe spring 22. The spring jaws 19 now reassume their clutching action on the lead 17, thus holding the lead against further movement. The extent to which the lead is moved out of the casing may be controlled by placing a finger the desired distance: fronrthe tapered end 2 to arrest the lead.

It will be seen that the invention provides a simple means of easily and quickly feeding the lead by a mere and single depressing ac"- tion to release the clutch and'feedin'g means;

Having thus described my invention what I claim as new and desire to secure byLetters Patent is:

1. A mechanical pencil comprising a casing having a tapered end and a notch adjacent said end, a shell in the casing closed-at one end and open atthe' other, flanges formed on said inner shell sliclably engaging: the easing, a coil spring in the closed end of said inner shell,- arod having; a disk abutting against said spring, a c-up-shapedniember having a finger engaging bottom projecting into the notch,.vasleeve rigidly extending through the bottom of'sai'd member and having a series of curved spring jaws which en-' gage the tapered end of the casing, a second coil: spring; engaged with the cup-shaped niemhenand with the shell for? urgingtthe cup=shaped member toward. the said tapered end ancl'a cap removabl y fixed the itpper enclof the'casingiand abuttin gtheclosed end of theinner-shell:

2;. In: a mechanical pencil, a casin gilraving a side opening, a spring pressed: slidable cup.- shaped I116n1l181*l111= the casing having; a finger engageable bottom, an innenshell, a spring Pfessed'rod' in! saiaclinner shellad'apted to engage amrdto exert downward pressure on; a leachand clutching means associated with the cu p-sllapedl member to releasah'ly clutch the lead against feeding whereby upon being actuated to enable the spring pressedi rod to automatically enterinto action. and to eflect feeding; of the lead.

3-. In: a ,pen-cil,., a casing. having a engaging notch adjacent one end, a slidable cup-shaped member-having a finger engag a-blc. part adjacent said; notch, lead-clutching jiaws carried by said cupsh aped member means for forcing: saidjaws againsta lead releasable by moving said part, and spring pressed means to feed the lead when said clutch is released. 1 1

4. A pencil having a casing formed with a depressed: part toreceive a finger, spring pressed-lead feeding'meansg and means "to normally hold the-[lead against movement haviI-rg a part. accessible for operation throughthe: depressed part whereby tore= lease the lead holding, means thereby to autonratically causethe feeding means to feed the lead;

5".- In a-pencil, a casing havinga finger receiving portion, spring presse'd'lead feeding means in the casing, and means to normally hold the lead against movement having a finger engaging portion disposed wholly within the periphery of the casing and operable through the finger receiving portion whereby to release the lead holding means thereby teautomatical-l y cause the feeding means to feed the lead.

6. In a pencil, a casing having a finger receiving portion", slida'ble means in the casing having a finger engaging part disposed wholly within the periphery of the casing and accessible through said finger receiving portion, lead clutching means carried by said slidable means, releasable means for forcing said! lead clutching means against-a lead releasab'lie-by'movingi said finger engaging part toslide: the slidable means, and means to feed the leadwhen the-lead engaging means is released; l

7 In a pencil, a casing having a cap: and having a finger receiving part at one end, a shell the casing, a spring pressed lead errgaging rod'in-the shell,- a'sl'idahlc memher having a finger engaging part accessible through the fingerreceiving part,-leadi clutching means associated with theslidable member'to releasably cl'utch the-lead against feed ing' and spring I-nean's engaging the slidable member and the shell to hold the latter against the' cap and to urge the slidable member to lead clutching position and upon rele aseto enahle the-lead feeding means'to automatically enter into action and feed the lead".

8-, In a'pencil a casing having a removable cap, a shell slidable within the casing, a flange on" the exterior of the shell engaging the inner circumference of the casing and forming the bottom of a magazine, the sides of which are conj ointly formed by the casing and shell, and spring means for holding the outer end of the shell engaged with the cap.

9 In apenci'l casinghaving a removable capga member slidable in the casingand conj'oin-tl y forming therewith amagazine, and

spring pressed means for holding the outer end of'themember engaged with the cap.

In testimony whereof I have signed my name to this application and specification. JOSEPH Z. SAVOIE.

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