US1697437A - Automatic pencil - Google Patents

Description

s sheetsQsheet 1' RNVENTCRS.. har/e5 I7. Sou, BY Juan @aba/le ma,

-/m i] THEM ATTORNEY Jam. ily 92@ Cx. H; www? ET AL AUTOMATI C PENC IL Filed July 15, 1926 w Ww y n w M v 0 c. H. s'rou'r Er AL A AUTOMATIC PENC'IL Filed July 13, 1926 5 Sheets-Sheet 2 .Q l"`\ S i E l ,f l E E u l .J/ Q N "t I x S a Y? Y x i un!! hz Q N 43 N Q N N N A (Q mvENToRs Char/e5 h'. 51'0u7T N Juan Cabo /ero BY m La? THEIR ATTORNEY c. H. s'rou'r a-rI AL Jan. 1, 1929.

AUTOMATIC PENCIL A5 -sheets-sheet INVENTORS, Char/e5 H 57h07,' v

Jaan Cabal/ `ov L92, .THEIR ATTORNEY,

Filed Juy l5,

Patented Jan. 1, 1929.

UNITED STATES PATENT OFFICE.

CHABLESH. STOUT, 0F 'NORTH ARLINGTON, AND JUAN CABALLERO, 0F SOUTH ORANGE,

' NEW JERSEY.

Au'romairrc PENCIL.

Application filed July 13,

The invention relates to automatic pencils and particularly to that type of pencil adapted to project and withdraw leads of two different colors or degrees of-hardness. u

The objects of the invention are to provide a pencil of this type which is extremely simple, cheap to manufacture and efficient 1n use. l

. short lead and this necessitates renewing the leads very often, which is a considerable annoyance. The present invention is designed to overcome all of these faults. A pencil is a clear understandin of the invention, drawprovided in which the leads are always well supported when in use. This is accomplished by roviding novel means for projecting the lea s of either color so that they are always in exact line with the central axis o the pencil. Only a very slight rotation is, necessary to change from one lead to the other and one is able to use a substantially long lead.

The pencil being formed almostentirely of standard tubing very little machine work is reqliired in making and assemblin 4and vthisA ma es for great economy in manu acturing. Other objects and advantages will become apparent as this specification proceeds. For

ings, in which are ilustrated one embodiment, are provided. Referring to said drawings:

Fig. 1 is a central longitudinal section, a Y

fragment ofthe upper part being 'in elevation Fig. 2 is a cross sectional view on a larger scale, taken on line 2--2 of Fig. 1;

Fig. 3 is a detail elevation showing the outer tube in elevation and the casing in section, A

Fig. 4 is a detailvperspectiveview of the inner spirally ooved tube withv a portion of the guide tug projectingfrom the upper part thereof, l

1926; Serial No. 122,075.

Fig. 5 is a detail perspective view partly in section of the guide tube and lead carriers,

Fig". 6 is a detailelevation of one of the lead supporting tubes, and,

Figs. 7 and 8 are detail sections on a large l scale, illustrating the means by which the lead is carried to the central axis of thepencil. These sections are taken on the line 7--7 of Fig. 1, showing the the helical slots..

Referring again tothe ,drawings the reference numeral 10 indicates the outer casing which may be made of rubber, Celluloid, or

any suitable material; Within the casing are 66?' two tubes 11 and 12 telescoped one within the other. Each of these tubes is provided with a pair of oppositelydisposed spiral grooves or slots which cooperate with each other so that the leads are projected or withdrawn 'IQ diameter of the tube. Thepitch'of the goove a0 13 is the reverse of that of the groove 14.

The inner tubev 12, as shownin Fig. 4', is likewise provided with two spiral grooves 17 and 18 which Amerge into strai htaway rtions 19 and 20. The itch oft e grooves 17. as

and 18 is aise opposite disposed. The tube 12 is sitioned within 'ne tube11-so that. the annu ar ves 15, 16 und 19, 20 Vare line with eacj which .will be described hereinafter, o oopered ate with these .two sets of grooves.- -In the position shown in Fig. 1, the pins,21, 22 are 1n the annular parts of the grooves. Thus it vmay be seen that if the tubes are rotated in relation to each other onel of the pins 21, 22 m0 will be forced downward, thus projecting its respective lead carrier and lead, and the guide pin just entering hese grooves 'f5 other and the' grooves 13, *14 andl 17 18 are adjacent each other. vThe spiral no,

othe'rpin will ride in the annular parts of the grooves. When the tubes are rotated in the opposite direction this lead carrier will be withdrawn and when its pin reaches the annular part of the groove the pin of the other lead carrier is in position to project that carner.

Means are provided so Ythat when pressure is applied to -the extended lead, as `it would be in writinv the lead is not forced back in the tubes. ecured in the outer casing is a shouldered .bushing 23. Resting between this bushing and the end of the tube 11 is a spring 24. The opposite end of the tube11is serrated at and cooperates with serrations on the end of a bushing 26 which is secured, adjacent a shoulder 27, on ythe upper end of the' tube 12.

i When the tubes are turned in relation to each other the serrations will readily ride over one another but when the lead has been projected a. suiiicient amount the sprin 24 will cause the sei-rations to lock, and the ead cannot slip back when a light pressure is applied to its end, as in writing.

The lower end of the inner tube 12 is threaded at 28 to'accommodate an internally threaded portion of the ti 29.V The tip is 'of the usual formation and as the lead guide and support 30 at its'extreme end. The pencil is operated b revolving the tip. The tip 29 being secure, to the tube 12 will cause said tube 12 to turn in relation to the tube 11 when the tip is revolved, thus projecting or withdrawlng the leads.

Inside the tube 12 is located another tube 31, which acts as a guide for the lead carriers and also as a magazine for the rspare leads.

This tube is particularly illustrated in Fig. 5. As shown it 1s rovided at opposite sides with guides 32 in t e form ofl longitudinally extending grooves or infoldings. lts lower end f be close .a bottom j "fand 221project slide in the may be ressedtogether or as shown it may b a plug or washer 33 so as to form fbr the 4lead magazine.

` .The lead carriers from which the pins 21 giide grooves 32.

These lead carriers might' constructed in numerous different ways and as illustrated',

comprise long thin tubes 34, extending" substantially the length of the bodyportion of the penc1l. The pin 21 which cooperates with the annular grooves 15, 19 and the spiral grooves 13,17 extends from and is secured ,to

- the intermediate part of one of the tubes 34,

' extends from and is secured to the and the pin 22 which enga es the annular grooves 16, -20 and the spir grooves'll, 18, j upper part ofthe other tube 34.l

' Extending from and secured to the lower parts of the tubes 34 are pins 35 which vare provided with oiset portions36. y Secured on the outer ends of said pins A35 are short lead holders 3?. W'hen either'of 'the yleads are projected are firmly supported at one' end by the lead holder and at the other end by the guide portion 30 of the pencil tip 29. The leads may be additionally supported by slotted members 38. The members 38, as illustrated, are formed of independent tubes but, if preferred they might be integral eX- tensions from the guide tube 31. f

In order that the leads be irmly sup orted so that there is no possibility of their reaking as soon as they are projected beyond the tip, when in use, it is very important that they be rojected in a straight line, coincident wit the centraliongitudinal axis of the encil. As illustrated this is accomplishe by varying the pitch of the spiral grooves 13, 17 and 14, 18. This is articularly illustrated in Figs. 7 and 8. Fig. shows the position of the pin 21 or 22 just as it leaves the annular part of the grooves and enters the spiral part. At this time the leads would be approximately in the position shown in lig..4 1. Fig. 8 shows the position of the pin after the lead has been projected from the position of Fig. 1 to the top of the tip guide 30. The spiral grooves are so formed as to cause the lead carriers to turn upon their own axis, immediately after entering said grooves. This naturally causes the oil'set portions of the ins 35 to turn as a orank and swing the lead lliolders and leads to the center of the pencil as shown' in Fig. 8.

The oiset portions'of the pins are so proporportions 320i the tube 31 might be extended down further and slots with offset portions out therein to accommodate the pins 35. Thus When both leads are in he foregoing result might be accomplished in other ways, vfor instance, the guide if either of the leads were projected the ,pins

35 striking these offset portions of the slots would swing the leads and lead holders to thecenter of the pencil.

The' upper end of ythe inner tube 12 is formed to accommodate the eraser holder 39 and eraser-40. .The eraser holder 39 acts as a closure for the lead magazine. The eraser and top of the pencil is preferably covered by a ca 41 of any suitable nature.

While a pre erred embodiment ofthe invention has been illustrated and described it is obvious that numerous changes in ar# rangements of parts and details of construction might readil be made by one skilled .in the art, without eparting from the spirit of the invention or the scope of the appended claims, l

What we claim as new is: J

1. An automatic pencil comprising, a pair of'tubes, telescoped one within the other and havin spiral grooves therein, the grooves in eac tube having opposite pitches, and a pair of lead carriers within the tubes cooperating with the grooves, the arrangement being such that when the tubesare rotated in one direction in relation to yeach other, one of the lead carriers will be projected torwardly and the other withdrawn and when the tubes are turned in the opposite direction the movement of the lead carriers will be reversed.

2. ,an automatic pencil comprising, a pair of tubes, telescoped one within the other, each tube having two spiral grooves of opposite pitch and assembled so that the adjacent grooves of each tube are'of opposite pitch, and a pair of lead carriers within the tubes cooperating with the grooves, the arrangement being such that when the tubes are rotated in one direction in relation to each other, one of the lead carriers will be withdrawn and the other projected forwardlyand when the .tubes are turned in the opposite direction the movement of the lead carriers will be reversed.

` 3. An automatic pencil comprising, a pair of tubes, telescoped one within the other, each tube having two spiral grooves of opposite pitch, said spiral grooves terminating in annular grooves going part Way aroundthe diameter of the tubes 1n a plane substantially at right angles to the longitudinal axis of the tubes, the adjacent grooves of each tube being'of opposite pitch, and a pair of lead/ carriers within the tubes cooperating with the grooves, the arrangement being such that when the tubes are rotated in one direction in relation to each other, one of the lead carriers will be withdrawn and the other projected forwardly and when the tubes are turned in the opposite direction the movement of the lead carriers will be reversed.

4. An automatic encil comprising, a air of tubes telescoped) one within the ot er, each tube having two spirai grooves of opposite pitch, said spiral grooves merging into annular grooves going part way around the diameter ofthe tubes in a plane'substantially at right angles to the longitudinal axis-of the tubes, the adjacent grooves of each tube being of opposite pitch and the annular parts of the grooves of each being in the same horizontal plane, and a pair of lead carriers having guide pins, the pin of one carrier cooperating With one set of grooves and the pin of the other carrier cooperating with the other set of grooves, the arrangement being such that when the tubes are rotated in one direction in relation to each other, one of the lead carriers will be withdrawn and the other projected forwardly and when the tubes are turned in the opposite direction the movement of the lead carriers will be reversed.

5. An automatic pencil comprising, a pair of tubes, telescoped one within the other, each tube having two spiral grooves of opposite pitch, said spiral grooves merging into annular grooves going part way around the diameter of the tubes in a plane substantially at right angles to the longitudinal axis of the tubes, 'th'e adjacent grooves of each tube being of opposite pitch and the annular parts of the grooves of each tube being in the same horizontal plane, a pair of lead carriers having guide pins, the pin of one carrier cooperating with one set of grooves and the pin of the other carrier cooperating with the other set. of grooves, and guides for the lead carriers, the parts being, so arranged that when the pin of one of the lead carriers is in the annular part of the grooves that .lead carrier will not move longitudinally when the tubes. are being rotated in relation to each other and the other lead carrier may be projected or withdrawn byV rotation of the tubes.

6. An automatic pencil comprising, a plu rality of tubes one within the other, two of the tubes having spiral grooves therein, the grooves in each tube being of opposite pitch, a pair of lead carriers within the tubes cooperating with the spiral grooves, the arrangement being such that when the tubes are rotated in one direction in relation to each other one of the lead carriers will be withdrawn and vthe other projected forwardly and when the tubes are turnedin -said spiral grooves and another tube forming a guide for said lead carriers, the ar- .95 the opposite direction the movement of the,

rangement being such that either of the lead carriers may be projected or retracted through said ti and at such times the lead will always be inline with the central axis of the tubes.

8. An automaticpencil comprising, 'a tube I having spiral grooves therein, another tube having spiral grooves of an opposite pitch, a tip secured toone of said tubes, a pair of lead carriers adapted to cooperate with said spiral grooves, said lead carriers having o set portions adjacent their lower-ends, and another tube having guides therein for said lead carriers, the arrangement being such th'at either of the lead carriers may be projected or retracted through said tip and at such times the lead will always be in line with the central axis of the tubes.

9. An automatic pencil comprising, a tube spiral grooves, said lead carriers having oii'- set portions adjacent their lower ends, another tube having guides therein for said lead carriers, and means for interlocking said tubes in relation to eachfother, the arrangement being) such that either of the lead carriers may e projected or retracted through said tip andat such times the lead will always be in linel with the central axis of the tubes.'

l0. An automatic pencil comprising, a tube having spiral grooves therein, another tube having spiral grooves of an opposite pitch,

a tip secured to one of saidtubes, a pair of lead carriers adapted to cooperate with said spiral grooves, said lead carriers having offset portions adjacent their lower ends, another tube having guides therein for said lead carriers, means fory interlocking said may be projected or retracted through said tip and at such times the lead will always be in line with the central axis of the tubes.

11. An automatic pencil comprising, a tube having spiral grooves therein, another tube having spiral grooves of an opposite pitch, a ti lea carriers having pins adapted to operate in said spiral grooves, said lead carriers having ol'set portions adjacent their lower ends, and another tube having guides therein for said pins on the lead carriers, said spiral grooves being so formed in relation to each other that the guide pins on the lead carriers will turn said lead carriers on their" own axes when said lead carriers are starting their downward movement.

In testimony whereof we aix our'signatures. tubes in relation to each other, and an outer casing, the arrangement being such that by rotating the tip either of the lead carriers `CHARLES H. STOUT.

JUAN CABALLERO.

secured to one of said tubes, a pair of

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