US1375029A

US1375029A - Pencil-holder

Info

Publication number: US1375029A
Application number: US348675A
Authority: US
Inventors: Valeggia Andrew
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-12-31
Filing date: 1919-12-31
Publication date: 1921-04-19
Anticipated expiration: 1938-04-19

Description

A. VALEGGIA.

PENCIL HOLDER- APPLICATION FILED 050.31, m9.

Patented Apr. 19, 1921.

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' To all whom it may concern Be it known that 1, ANDREW VALEGGIA, a Swiss citizen of London, England, have invented new and useful Improvements in Pencil-Holders, of which the following is a specification.

This invention relates to pencil-holdershaving screw-propelled means for advancrng the lead, and it has for its object to provide an improved pencil-holder of this kind possessing in addition the characteristics of a magazine pencil-holder, that is. to say a pencil-holder adapted to contain several spare leads in addition to that lead which for the timebeing is in use, and provided with means for enabling such spare leads to i be brought into operative position-in succession as the lead in use becomes exhausted.

One form of the improved pencil-holder is illustrated in tlieaccompanying drawings, wherein Figure 1' is a side elevation, partly in section on an axial plane, while Figs. 2, 3, 4 and 5 are cross-sections on lines 2-2, 33, 4- 1, and 5-5 of Fig.1, respectively, and Fig. 6 is a cross-section (corresponding to Fig. 5) of a similar pencil provided with a magazine for holding more than four :7-

leads. v

In the example illustrated, the outer casing or barrel comprises two cylindrical main sections, namely, a rear section 11 and a front or magazine section 12, which are united by a screw-joint 13, the magazinesection 12 having a conical point-section 14 attached by a screw-joint 15 soas to be removable for the purpose of afl'ording access to the interior of the magazine. The axial sheath 16, for containing that lead which is in use, extends throughout the length of the magazine-section 12 and is semi-cylindrical except at its ends. The sheath 16 as a whole is rotatable relatively to the barrel; the

front end 17 of the sheath being for a short distance wholly cylindrical and fitted to turn in abearing 18 in the point section 14,. while the rear end of the sheath is fixed in an aperture in a-cam-disk 19 which'is capable of turning in a chamber immediately in rear of an apertured diaphragm 20 forming the rear closure for the magazine-section 12.

The efi'ective internal length of the magazine-section 12 corresponds to the length of a single lead, and its inner wall is formed Specification of Letters Patent. 7 Patentadi Apr, 1%, TLQJZL; Application filed December 31, 1919. Serial No. 348,875. I

with a seriestfour in the example) of ap leads housed within the several magazine recesses (see Fig. 5).

The axial bore'23 of the point-section 14 1s of such diameter as to allow a lead to pass through it friction-tight, and in order to efiect the extrusion of that lead which is in use, as 1t wears away, and also to furnish an abutment for the pressure upon the point of the lead in writing, a screw-propelled plunger .24 is fitted to slide lengthwise of the axial sheath 16. This plunger consists of a rod having a round sectionyof two radii corresponding respectively to the radii of the internal and external surfaces of the semicylindrical portion of the sheath 16, so that send sheath together with the plunger presents the form of a complete solid cylinder; an arrangement which insures the plunger and sheath turningas one in either direction about their common longitudinal axis when The plun er 24, when retracted from; within the eath- 16, passes rearward along an axial bore 25 in a screw-barrel 26 which isrotatably mounted within the rear section 11 of the holder; the screw-barrel 26 having at its rear end an axial pintle 27 which, pass- I ing through a hole in a diaphragm 28 which forms the rear closure of the section 11, carries at its outer end a cap 29. whereby the screw-barrel can be turned by the fingers when necessary. The wall of the screwbarrel 26 is trayers'ed, throughout its entire thickness between the outer periphery and the axial bore 25, by a helical slot30 through which a radial stud 31, fixed in the plunger 24 ,near the-rear end of the latter, projects so far it is adapted to enga e in any one of a s'erles of straight longitudinally-extending and also with the effective length of the magazine-recesses 21) is shown as having a left-hand twist, so that the plunger 24 will be advanced to feed forward a lead through the sheath 16 and the bore 23 at the point of the holder,

when .the cap 29 is rotated clockwise relatively to the rear end of the holder. When, owing to the advance of the plunger 24, the lead contained in the sheath 16 has been extruded as far as the front portion 17 of the sheath, .the radial stud 31 will have reached the front end of the helical slot 30, and will also have passed beyond the front end of that guide-groove 32 along which it has just been advanced, so that the stud will have entered into engagement with a notch 33 in a rotatable controlling-ring 34 which is housed in a cavity 35 in the inner periphery of the wall of the section 11 just in rear of the cam-disk 19 on the sheath 16. In the angular position occupied at this moment by the semi-cylindrical sheath, 16, the open side of the sheath is 'such rotation is indicatedand opposite to that now empty magazinerecess 21 whence the lead just extruded was derived, and it is therefore necessary to bring the open side of the sheath 16' opposite the'next magazine-recess 21 (assumed to be chargedy in order that a fresh lead may be transferred from the latter recess to the sheath 16. For this purpose the screwbarrel 26 requires to be rotated, in the same direction as before, through the angular interval separating two adjacent magazine- "recesses 21 or, what is the equivalent of this, through the angular interval separating two adjacent guide-grooves 32. The amount of controlled by means of the controlling ring I now turns as one with the plunger 24 owing to the engagement of the stud 31 with the notch 33; thecontrolling-ring 34, which is formed of spring metal andsplit so as" to tend to expand radially, being adapted to engage by one of its ends in a circumferential series of ratchet-recesses 36in the wall of the cavity 35-, as indicated at 37 in Fig. 3. This arrangement permits of such continued rotation of the screw-barrel 26, plunger 24, and sheath 16, after the stud 31 has reached the forward end of its travel, as is re uired in order both to bring the stud 31 eneath the next guide-groove 32 and also to bring the open side of the sheath 34, which 7 sheath, and also of causing the stud 31 to ascend along the next guide-groove 32.

As an additional means for checking the step-by-step rotation of the sheath 16, the cam-dlsk 19 is formed with a series of peripheral depressions 38 (Fig. 4) with which a stationary spring-tongue" 39 successively engages as the cam-disk turns along with the sheath; there being as many equally-spaced depressions 38 as there are magazine-recesses 21. The spring-tongue 39 is shown as stamped-up from a ring 40 of thin sheet metal fixed within the front end of the section 11 of the holder around the cam-disk 19. p v

After the complete extrusion of a lead from the sheath 16 and the subsequent rotation of the sheath to the next angular position in the manner above described, the screw-barrel 26 is rotated in the reverse direction so as to retract the plunger'24, theradial stud 31 meanwhile sliding up the next guide-groove 32. When the plunger 24 has been completely retracted,\a spare lead can be shaken or allowed to fall from the magazine into position within the sheath 16, whereupon a fresh reversal of the rotation of the screw-barrel 26 will bring about the extrusion of the new lead, and so on for all the leads contained in the magazine.

It will be evident that if the number of spare leads accommodated in the magazine I be materially greater than four (as shown in the example illustrated), the thickness of the tube 16 will have to be increased so as to retain such greater number of leads in their iresp'ective magazine recesses 21 until the open side of the tube-is brought into po-- sition opposite a spare lead which is to be allowed to dro into the tube. In such case the tube 16 wil no longer be strictly semicylindrical, but will as indicated in Fig. 6, assume the form of a solid cylinder 41 bored axially to receive a lead and having in its wall a longitudinal gap 42 (of the same width as the axial bore) adapted to allow a spare lead to pass from the magazine into the bore. i

What I claim is:

1. A magazine pencil holder, comprising an outer casing, a sheath, axially of said casing, for containing that lead which is in use,

said sheath being provided with a longitudinal, opening through whichleads are introduced from the magazine; a magazinejintegral with said casing and surrounding said sheath, said magazine including a pluscrew propelled means whereby the latter means within the casing for holding the neraoee rality of separate compartments extending longitudinally in parallel relation to said sheath, each compartment adapted to hold a single lead, means permitting step by step relative rotation of said sheath and magazine in one direction only, to bring the sheath opening in register with said compartments in succession, a screw propelled plunger for advancing a lead in the sheath and means controlled by said plunger for preventing relative rotation of said sheath and magazine until said screw ,propelled plunger has extruded the lead in the sheath a predetermined amount.

2. A magazine pencil holder comprisinga casing, a plurality of'longitudinally extending ribs forming magazine compartments in said casing, each adapted to hold a single lead, a sheath located centrally of said magazine compartments, said sheath being provided with a longitudinal opening adapted to be brought into register with said ma azine compartments in succession by rotat on of said sheath in one direction only, and means for preventing reverse rotatlon of said sheath.

3. A magazine pencil holder comprising a casing, provided with a plurality of magazine compartments, each aapted for holding a single lead, a rotatable sheath located centrally of said casing and provided with a longitudinally extending opening, adapted to be brought into register with said compartments in succession for transferring lead from a compartment to the sheath, means for preventing rotation of said sheath in one direction, a detent for locating the opening in said sheath in proper register f with a compartment, screw propelled means for advanclng a lead in said sheath, and cooperating between the sheath and said may rotate said sheath in one direction when said screw propelled means has extruded the lead a predetermined amount. 4. A magazine pencil holder comprisin a casing, provided with a plurality of 111 wardly extending radial ribs, forming ma a- I zine'compartments, each adapted to hol a single lead, a'sheath mounted for rotation centrally of said casing andprovided with a longitudinal opening adapted to be brought into register with each of said compartments in succession by rotating said sheath, whereby leads in the compartments may be transferred to the sheath, a screw propelled plunger-in said sheath for adgancing a lead ted. with said plunger, and extending laterally for co6p-, eration with one or another of a plurality of guide grooves extending longitudinally within said casin said guide grooves correspondingin num er with the compartments in said 1 magazine and-means whereby said stud or pin may be moved out of one groove and rotated into line with the next adjacent groove simultaneously with the rotation of advancing a lead, means for preventing rotation of said sheath except by said plunger, a screw in said screw section for propelling said plunger in said sheath, means for preventing rotation of said plunger, while being advanced by said screw, and means for permitting simultaneous rotation by said screw of said sheath and the plunger when the latter has been advanced a predetermined amount.

6. A magazine pencil holder comprisin a casing, provided with a plurality of radially extending partitions, forming magazine compartments, each adapted for holding a single lead a central sheath for a single lead, providedwith a longitudinal opening, adapted to be brought into register with said magazine compartments in succession by rotation of said sheath, a .plunger in said sheath for extruding the lead, 'a screw in axial alinement with said plunger for advancing the same, coiiperating means between said plunger and the casing for preventing rotation of the plunger when-the screw is rotated for advancing the plunger,

plunger against advancement by the screw, said last named means being rotatable with "the plunger step by step in one direction, while holding said lunger against advancemovement, means w ereby said sheathis r0- t ated simultaneously with the rotation of said plunger, a click detent for holding said plunger and sheath with the opening in said sheathin register with the magazine compartments in succession and means for preventing rotation of said plunger and sheath when said screw is rotated in the opposite direction to retract said plunger being provided with a longitudinal opening adapted to register with one or another of said compartments, a screw propelled plunger in said sheath for extruding a lead therefrom, cooperating means whereby said plunger is adapted to rotate said sheath, step by step, to bring the opening in the latter into register with successive compartments when the lead in the sheath has been extruded a predetermined amount, and means for pre- 10 ANDREW VALEGGIA.