US2184911A - Pressure feed pencil - Google Patents

Description

K. FEND 2,184,911.

PRESSURE FEED. PENCIL Filed Jan. 31, less 2 Sheets-Sheet 2 Dec. 26, 1939.

Patented Dec. 2c, 1939 PATENT; OFFICE PRESSURE FEED PENCIL Kurt Fend, Pforzheim, Germany Application January 31, 1938, Serial No. 187,977 In Germany April 29, 193'! 10 Claims. '(01. 120-17) My invention relates to pressure feed pencils. Pencils of the general class to which my invention belongs are well known. f the various pressure feed'pencils known, those in which the lead core is pushed forward by means-of a ratchet tong that can be locked with a ratchet-ring dragged by the said ratchet tong have proven the most efiicient. In this construction; the clamping of the lead core is especially reliable andguarantees a controlled and positive feed and retractive action. Pressure feed pencils of this kind,- however, have the disadvantage that as each lead core isalmost entirely used, there remains a remnant of lead which is held only by theratchet of the pencil point and not by the ratchet tong as well. This has a decided disadvantage; The ratchet tong is pushed partly into the ratchet ring until it is entirely stationary and takes back with it in this manner the lead which it grips. This retracting 0 movement, however, is not shared bythe afore said remnant of the lead remaining-in the ratchet of the pencil point, so that an intervening space is created between it and the following lead which is gripped by the ratchet tong. In this space, the remnant is pushed when writing pressure is brought to bear. This disadvantage is very disturbing in writing. A further disadvantage ofthese pencils lies in the fact that the remnant which is no longer held by the ratchet tong easily rotates in thepencil point, andthis makes writing diflicult. Efiorts have been made to overcome these disadvantages by pushing the-ratchet tong up in the hollow spaceof the pencil point close to the opening in the tip thereof. This, of

course, diminishes the length of the remnant of lead. However, in'this case,the point of-the pencil must be hollowed out close to the tip to.

, fit the thickness of the tong and this weakens the point to such an extent that any shock, such as a 40 fall, damages it easily and thereby makes the I entire pencil unusable. There are also known pressure pencils in which two movable and spring actuated tongs are used.

These do not, of course, show the cited disad-- vantages of the receding of theremnant and its rotating in ,the point. However, they have the disadvantage that they cannot use a tong cooper ating with a loose ratchet ring and the advantages connected therewith and, in addition, cannot entirely retract the lead from the" frontwhen" the same is not in use.

Finally, a construction of pressure feed pencil was proposed in which, in addition .toa ratchet tong cooperating with a movable ratchet ring, a

. movable point ratchet was used which was pushed forwardby the'ratchet tong at the culmination of its forward movement. This pencil too, has

, the disadvantage that the remnant recedes backward when writing pressure is brought. In addition, the strong spring action actuating the 6 ratchet point impedes the pushing of the lead through the ratchet point;

With the foregoing in view, an object of my invention is to provide a pressure feed pencil which overcomes all of the known disadvantages of l known constructions and which combines all of the advantages of the prior art' by usinga ratchet tong which cooperates with a movable ratchet ring and which guarantees the rigid position of the .lead core,. as well as a sure and controlled. 15

feeding thereof.

A further object of my invention isto provide a pencil which prevents the undesirable retraction of a lead remnant when writing and which provides means for holding the said remnant tight 20 in the ratchet point and preventing its rotation.

vA still further object is to provide a pressure feed pencil-with a ratchet tong which is controlled and movable against spring action and which can be locked by a movable ratchet ring,

together with a spring controlled slidable ratchet point which, at the end of the forward movement of the-ratchet tong, is pushed by it .a short distance ahead. Such an operation consists in the I fact that through the feeding action of' the ratchet so tong, the spring action is liftedfrom the ratchet point and the latter is forced backward again only after the total retraction of the ratchet tong, at

which time said ratchet point again becomes subject to spring action, whereby the distance of forced travel of the. ratchet point is at least as longas the ratchet way; in which the ratchet tong again takes back the lead which it has gripped. The above form of construction makes it ,possible for the lead core which has'been pushed for ward by theratchet tong and locked inforward position by means of the ratchet ring to overcome only a negligible resistance-in the ratchet point, even when, the latter is pushed back by means of spring action into arigid position. In addition,'

the receding of the ratchet point at the end of the movement takes with it any remaining remnant of the lead core until it presses against the-suc- 'ceeding lead core held by the ratchet'tong, so 50 s that it is rigidly seated and the writing action cannot-push-it, back further. In addition, it is possible to push the lead core which protrudes from the pointof the pencil entirely within the pencil when not in use by simply pushing it back 55 ceding of the last two is made possible.

after the ratchet tong has been pushed forward and thereby released.

To obtain a certain and independent functioning of the ratchet tong and the tongue point, it is recommended to allow the lead core storing retainer which is mounted on the pressure cap function only after an empty run before feeding a lead to the ratchet tong, since even in the neutral position of the ratchet tong, lead core storing retainer and ratchet point, a further re- This will correct inaccuraciesof manufacture and irregularities in the thickness of the lead. The construction can provide a receiving piece which closes off the lead storage container forwardly and which is mounted on the rear part of the ratchet tong shaft, which said rear part projects into thelead storage container, and having a neck-shaped recess in front of said receiving piece in which a fork-shaped bearing piece is frictionally held that penetrates the lead storage chamber into two opposite slits and which bearing piece runs in two opposite openings with the ends which protrude from the slits, said openings'being located in the shell connected to the tongue point. It has further been proven to advantage to mount the ratchet tong in a conduit which is carried inside the ratchet ring which is slidable between stops, and which conduit has on its outer surfacetwo oppositely situated screw sections with which it penetrates the shell connected to the ratchet point by means of two openings, and has an intermediate shell screwed in its forward part, said intermediate shell being fixedly mounted to the outer shell. In this manner, the drawn-in forward edge of the intermediate shell will form a stop for a break of the shell mounted to the ratchet point.

The pressure feed pencil is provided, according to the invention, with two springs, one of which actuates the ratchet tong, while the other actuates the ratchet point. To obtain free action and with it a compact arrangement, the ratchet tong spring can rest with its forward part on the casing surrounding the ratchet tong and with its rear part on a connecting ring of the ratchet tong shaft. The spring actuating the ratchet point can rest with its forward part on a shell which rests on the casing. This she ll bridges the ratchet tong spring. The'ratchet point spring is arranged with its rear part resting against the forward part of the lead storage container.

Another embodiment is possible by permitting the spring actuating the ratchet point to rest with its forward part on the casing surrounding the ratchet tong, and with its rear part on the forward part of the lead. storage container and where the ratchet tong spring is mounted forwardly of the ratchet tong and actuates the for-' ward parts of the ratchet cheeks.

A pressure pencil according to the invention, can have a ratchet point shaped in various ways, as is well known inthe art. The ratchet point can form directly the conically-shaped point of the pencil, or the ratchet point can be encased by the conically-shaped lead pencil point which in turn is fixedly connected to the outer casing, be-

ing drawn inside by means of a spring, whereby through the conical outer surfaces of the ratchet point the pressing action is increased.

All pressure pencils with a movable ratchet tong have in common a hollow space in front of the ratchet tong which permits the forward action of the ratchet tong-during the lead feeding process. This hollow space must conform in its at this point and pieces of lead and graphite dust 5 settle in this hollow space. This often leads to stoppages. It is an object of this invention to eliminate this disadvantage by filling the space between the ratchet point and the ratchet cheek by a tube which is pressed against the forward 10 parts of the ratchet cheeks by means of a spring, said tube and tong moving forward in unison with the forward movement of the ratchet tong. This spring, by being made correspondingly stronger, can serve, at the same time, as .a ratchet tong spring and thereby eliminates the necessity for an additional ratchet tong spring, together with the necessary parts to support it.

The spring motivated tube can further be used in known manner to force the spreading apart of the ratchet cheeks'in the forward position of the ratchet tong by shaping the forward part of the ratchet cheeks conically inwardly and the rear part of the spring actuated tube conically outwardly in such manner that at the end of the 25 forward movement of the rear part of the tube, the ratchet tong is spread apart. a with the foregoing and other objects in view,

the invention consists in the details of construction, and in the arrangement and combination of 30 parts to be hereinafter more fully set forth and claimed.

In the drawings, wherein, by way of examples, three embodiments of the invention are shown:

Figure 1 is a longitudinal sectional view of one the line II'II of Fig. 4 and showing the inner 40 parts of the pencil pushed forward;

Fig. 3 is a cross sectional view taken on the line III- 111 of Fig. 1;

Fig. 4 is a cross sectional view taken on the line IVIV of Fig. 1; 4 Fig. 5 is an elevation, partly in longitudinal section, of a part of the pencil;

Fig. 6 is a'top plan view of the pencil part of Fig. 5;

Fig. '7 is an elevation with portions in longitudinal section ofanother part of the pencil;

Fig. 8 is an elevation of the pencil part of Fig. 7, taken at right angles to Fig. .7;

Fig. 9 is an elevation with parts shown in longitudinal section of a second embodiment;

Fig; 10 is a longitudinal section of a further embodiment of the invention; and a "Fig. 11 is a fragmentary longitudinal section of the upper end of the pencil.

The pressure feed pencil according to Figs. 1 to 50 4 has an outer casing I, in the forward part of which is mounted a conical point 2. Within the outer casing l is an intermediate shell 3 which is fixedly connected to the casing I, for instance, by means of soldering, and which intermediate 6 shell 3 has its forward end reduced to form a neck 3, the inner periphery of which is provided with an impressed thread 4. The free end of the neck t is upset inwardly, as at 5. Threaded in the neck s is a tubular part 6, which latter is shown in elevation and plan, respectively, in Figs. 5 and 6. Part 6 is formed to provide on'its outer side, two segmental externally threaded portions 1 arranged opposite to each otherand taking up about one-quarter each of the circumference of 1| ragon the neck 4. Between and inwardly of the peri-phery of these two threaded portions 1 are formed arcuate and smooth surfaced parts 8. The bore 9 of the part 8 is enlarged at its forward end as at II, which enlargement is bounded rearwardly by a shoulder or stop I I andforwardly by a stop l2.formed-by an inwardly upset edge of the tube 6. A ratchet ring ls'wmon is slidable between the stops and I2 is situated in the enlargement i0.

A shell I4 which is shown in Figs. .7- and 8 is slidably carried by the tube 6. The shell l4 has an enlarged rear part I6 of such diameter that it can be pushed over the threaded segments 1 of the tube}. Near its rear part IS, the shell [4- is formed toprovide two openings i6 positioned opposite to each other. The front end' ofth e .shell is reduced to provide a neck H of a smaller inner diameter which is only large enough to permit the neck 11 to surround the smooth arcuate surfaces 8 which lie between the thread- I ed segments I. The neck provides two facing openings is to permit the extension therethrough of the "two segments I, so that the por- 3 tions intermediate the openings l8 consist of two narrow portions, The forward end of the. neck I! is further reduced to provide a neck is whichiorms a shoulder or stop 28 at its Junction, with the neck I'I. The neck is has an internal M thread 2|- m which is threaded a tubular shell 22, the-forward end of which is inwardly upset to provide a stop. 28. A lead receiving tube 24 is slidably carried by the shell 22. The tube 24 has a diameter sufllcient for a sliding fit through the reduced opening formed by the inwardly up et edges 23 of the shell 22. The rear portion of the tube 24 isformed to provide an enlarged collar 28 whichhas a sliding fit .agal'nstyth'e inner periphery of the shell n 22. The upper edges of the shell 22 are inwardly 3 i 'wardly by a shoulder; 39 which forms the start of an enlarged portion '40 ofthe tong tube 35. Portion 40 terminates forwardly in a shoulder 4| which connects portion 40 witha reduced portion '42, which in its turn is furtherreduced and slotted I 5 to provide the ratchet tong cheeks 36' (see Fig. 4). T On the tube part 42-. of the tong tube 35 is slidably mounteda collar ring 43 which forms I the rear stop of a pressure spring that rests with its forward end on the shoulder formed on 10 the tube part 6 by the enlarged portions I. The rear end of the spring 44 engages the collar 33. The action of the spring 46 forces the collar 43 rearwardly against the shoulder 4i of the tong tube 35 and tends to force this tube rearwardly. The collar ring 43 and the spring 441 are enclosed within a bell-shaped shell .45 which is slidably mounted on thexenlarged portion 4d of the ratchet tong tubeii. This shell 45 forms the forward support of a spiral spring 46 which loosely surrounds the tube part 40. Therear end of the spring 46 rests againsta shoulder 4'I formed between the forward end of a lead storage. .chamber 4! and a reduced neck 4'| thereof whlchhas a 'slidable lit with the tubetpart gh 40. Above the shoulder 4'I ,'the-chamber 41 isv formedto providetwo' facing transverse slits 48. I Through the slits 48-, a fork-shaped carrier piece 49 extends in such a manner that it grips with its two fork arms 49- the; neck as of the w ratchet tong tube and thus connects thelead storage chamber "with the ratchet tong, (see Fig. 3). Disk 31! on the rear part of the ratchet I tong tube 35 forms a. funnel-shaped bottom forv f the leadstorag'e chamber dl, whereby fresh leads are continually fed to the interior of,the ratchet such length that it extends beyond the openlugs 48 in the chamber 47 and its protruding ends 50, 50' pass through the two openings 16 upsetas at 28 to a lesser degree than the. lower P of the shell 14. The} fork 59 is held in this edges 28 to provide a stop. Thus, by the stops 23 and 28, and the collar 25, the sliding of the tube 24 in the shell 22 is definitely limited. The I inner diameter of the tube 24 corresponds to the diameter of the lead. v

The rear end of the tube 24 projects'out of the rear end of the shell 22 and is formed to provide a conical point 26. The tube 24 is normally held in a retracted position by a spring 21- which is mounted in the shell 22 between the edge 23 thereof and the collar '25 of the tube 26. The neck id of the slidable shell i4 provides an outer thread id on which the coni-' cal point 2 of the pencil is screwed. -The bore of the point 2 varies in diameter to provide several stops. One .reduced'portion 29 is sizedto have a sliding lit with the front end of the tube 2d The diameterof the extreme forward porw ti'ondd of the bore corresponds to the. diameterof the lead iH. The tip of the point 2 has been;

slotted longitudinally in' the" usual manner to. provide a spring actuated ratchet point; I I The tubular part 6 carries aratchet tong tube as which is slidably mounted therein andrvhich. in the Mom manner; "is provided at its front end with resilient ratchet cheeks 86 by means of longitudinal slits formed therein. The cheeks 38 are spread outwardly by their own elasticity and m are pressed against the lead to grip the sameby .75 ing the disk 31. The neck 28 is bounded forposition by means of the en agement of the ends 50, 50 with the inner periphery of the slippedover intermediate shells. I I

A lead 52 is shown supported in the ratchet 45 tong tube 35 and rests upon the rear end of the lead 3i which is in use.

The rear end of my pressure feed pencil-is the same in all forms and is shown in Figfll. 0n the rear end of the lead storage .chamben t] a pressure cap 5! is frictionally mounted which closes the chamber rearwardly. Y

The operation Iofthis form of my pressure feed pencil is as follows: I

In Fig. 1 (the neutral position), the position '53 of the inner .parts shows the ratchet. tong tube -36 pushed backward by spring dd and this, in

turn, causes the ratchet cheeks 36 to be rigidly drawn into the ratchet ring it and firmly pressed into engagement with the lead 52. The point 2 is actuated by spring 46 which pushes the lead storage chamber 41 backwards and withit the fork-shaped carrier piece 49 and also, the shell l4 and the point which is threadedly connected with the latter. This movement is as limited bythe engagement of a stop 2 formed on thepoint 2 with the forward edge .of the outer casing I. The forked carrier piece 48 slides rearwardly freely until it strikes theend disk- I 3! of the ratchet tong tube 35. The lead 3! .7

held by the ratchet point 30- rests, 'as aforesaid,

on lead 52. The conical .rear partld of the tube 24 is actuated rearwardly by the spring 21 and rests on theforward bevelled faces' of the "ratchet tong cheeks 36. .15

By pressure on the button the lead storage chamber ,4'l, together with the carrier piece 49, is advanced without at first causing any movement of any other parts, against the action of the' participate.- The ratchet tong carries lead 52 nel by the following lead 52. His possible that forward until the engagement of the ratchet ring l3 with the tong cheeks 38 is released through the ring engaging with the stop l2.

During this part of the movement, the point 2 remains unmoved and during this movement'the lead.3l is pushed forward through the feed chanthe point 2, which is no longer pressed back by aspring 46, may advance with the lead 3| through the friction of the lead 3|. Shouldthis not oc- "cur; the'point 2 is' forced ahead in the latter part of the feeding movement after the fork- V shaped carrier piece-49 comes to rest on the for-.

ward edges of the openings l6 of the shell l4 at which time it moves the shell l4 andpoint-2 forwardly. Lead 52 which has in the meantime been released as aforesaid; from ratchet cheeks 3i fol-' lows by gravity. The forward movement of the. shell 14 is limited by the coming to rest of .its

shoulder or stop (Fig. 2) o the inwardly upratchet cheeks as do not carry back lead 52 until set forward edge 5 of the intermediate shell 3.

During this process, the ratchet tong cheeks 355 push steadilyagainst the conical end of the tube 24. As soonas the ratchet ring 13 releases the ratchet cheeks 36, the latter spread apart.

This spreading movement is. furthered by the penetration between the cheeks of the conical real part 25 of" the tube 24 by reason of the pressure of spring 21 and 'so spreads apart said cheeks.

Figure 2 shows the position of all parts at the conclusion of the feeding movement.

the pressure on the button 5| is released, the lat returns to its original position by theaction of spring 46. The ratchet tong 35and the lead storage chamber j4l, together with the fork-. shaped'carrier piece 49, recede under the action .of springs 44 and 46. In this recession the ratchet ring I! which hasreceded' also comes to wrest at its rear Step II and closes the ratchet cheeks lightly. The racliet Fcheeks arethen drawn into the ratchet ringjto stay fixed andLin this manner, carry. with them'thelead 52.. Be-

ception'of the action ofthe "ratchet way which does notoccur."

tween lead 52 and the lead 3| held. by the point a vacant space is formed. This is m mediately, in that point .2.is also eliminated i pushed back by therceding carrier piece49 through shell 14 until the stop 2' of point 2 engages the forward edge' of the outer shell I. The moving path qt the point 2 has been made at least equal tc the ratchet way of the tong. In this way, the lead il is brought back alo this path andagainrestson the lead 52. Q

If the lead when being used for writing is so long that it is held by the ratchet tong as -well .as the point, this does not alter in any waythe process of the pressure feed-pencil, with the'ei- In the embodiment cannot rotate.

cut, in which a tube 32 is screwed. The rear internal diameter of the forward part of the tube 32 corresponds to the diameter of the lea'd 3l and is shaped through longitudinal slits to provide a ratchet point 34 with conical outer surfaces. In this embodiment, the narrowed internally threads ed part 4 of the intermediate shell 3 is-not reduced but is carried forward over the threaded seg-- ments 1 of the tube 6. In thisthreaded part 4, 1 a conical point 53is screwed which adjoins the outer shell I. The bore of the point 53' is enlarged at its rear part 54' to provide a. channel. L for the shells l9 and 22* and is narrowed at'its part 33 of the bore of tube 324s enlarged to pers mit the forward movement of the tube 24;. The.

forward part 55 to, provide a'fixed pincher for. the conically shaped outer surfaces 34* of the e ratchet point3( 'In all other respects, this embodiment is the same'as' inFigs. 1 to 8.

-' The operation of this pressure feeding pencildiffers from that of the first embodiment, 'in that to rest on the rear edge 53" of;the point-53. The.

. The feeding action is thereby Y tube 32 is brought back at the end of the back 'war'd movement of the lead storage chamber 41.

In this way; it takes back with it the balance of the lead 3| andeliminates thereby the-space be- I tween leads .52 and 3| In the writing pbsition shown in .Fig." 9, the ratchet point 34 is drawninto the forward chan aus'ed by the ratchet. way of the ratchet tongo the first form.

nel-55 of the point=53 by means of a spring (not shown, but corresponding -to-'-the spring 46 of Figs. 1 and 2). compresses the ratchet I point and holdsthe'lead 3| S0 that-it The'embodiment of the' pressure feeding pencil of Fig. 10 shows an outer casing I' and an inter-.

mediate casing 3 positionedwithin, whose reduced fro'n'tend .4 has an internal thread 4, in which aconical point 53' has-been screwed. In addition, a tube 6 is screwed rearwardly in this thread 4'. The casing 3" carries a slidable shell l4", whose-forward reduced end l9 ise xte'nded.

further reduced and slottedto provide the ratchet point 343. ,In the tube -6 the ratchet tong tube ing on the shoulder ofathe tube 6. Inf-the re- 'duced neck I! of'the shel l4". a shell is slidratchet tong tube 35 and forces the ratchet cheeks into the ratchet ring l3. which holds thelea'd 52 rigidly. This modification functions and operpencil of Fig. 9.

Iclaimz -1. A'pressure feed pencil including-a casing, a storage chamber for leads slidably mounted in memberslidably mounted in said pasingadjacent I said chamber and in axiialalinement therewith,

of Fig. Q-in'the forward part of the boring-of shell 22, a thi'e2ui222 is means to guide leads to the bore 'of said member ably mounted which,'in turn, has a. longitudinallya slidable tube 24 and a -apring'i'l actuating this tube The spring, 2'l' pressee-thetubefl against .the forepart of the ratchet cheeks 3610f the .05 I Q ates in the same manner as the: pressure-feed 1o said casing at the rearend thereof,-a tubular gripped thereby, means'for temporarily releasing from said chamber, theforward end of said mem-f 5 aisaaf '1 member comprising means for releasably gripsaid casing at the rear end thereof, a tubular ping a lead in said member, means whereby slidmember slidably mounted in said casing adjacent fing of said chamber towards the front end of said chamber. and in axial alinement therewith,

said pencil advances said member and the lead means. to-guideleads-tothe bore ofsaid, member said lead upon the sliding of said chamber and ber comprising means for releasably gripping'a member in the-opposite direction untilthe cham-" lead in said member, means whereby sliding 'of her and member have assumed their original said' chamber towards the front-end of said positions, a connection between said member and oil advances said member and the lead'gripped m chamber, said connection being operative to adthereby, .means' ,for temporarily releasing said l Vance said member with said chamber only after leadupon the sliding ofsaid chamber and memthelatter has been advanced a predetermined her in the opposite directioniuntilthe chamber 3 distance, a shell slidably mounted in said casing and member have assumed their original posiand surrounding said chamber and member, lead tions, a shell slidably mounted in saidcasing and.

ripping means connected to the forward endof surrounding said chamber and member, lead,

said shell, said connection between saidmember gripping means connectedto the forward end of and said chamber being engageable with said said shell, the rear end of said member extend- .shell to advance the same and said gripping ing into said chamberand being outwardly flared means after the advance of said member has to provide a funnel-shaped bottom therefor, a? commenced. N connecting'member extending transversely across 1 2. A pressure feed pencil including a casing, a the lower end of, said chamberbelow said {flared storage chamber for leads slidably mounted in; end of said tubular member, a' stop onssald tubasaid-casing at the rear end thereof, a tubular lar member below and spaced fromcsaid conmember slidably mounted in said casing adjacent necting member and engageable therewith after 3 said chamber and in axial alinement-therewith, said chamber" has been advanced -a predeter- Y means'to guide leads to the bore of saidmember mined distance whereby to cause said tubular from said chamber, the forward end of said memmember'to be advanced with said chamber'thereber comprising means for releasably gripping a atter, the'ends of saidconnecting member exlead in said member, means whereby sliding of tending beyondsaid chamber and being engagesaid chamber towards the front end of said p'enable-"with said shellto advance the same after 1 oil advances saidmember and the lead gripped said chamber has been. advanced a predeterthereby, means for temporarily releasing saids mined distance. f. j lead upon the sliding of said chamber and mem- 5. A pressurefeed pencil including a casing, a her in the opposite direction until the chamber storage chamber for leads slidably mounted in a and member have assumed their original'posb' 5 said casing at the rear endthereof a tubular tions, a connection between said member and 5 member slidably mountedin'sald casing adia-.' chamber, said connection being operative to ad-, cent said chamber and in 'a'xial{ alinemen t'there-' Vance said member, with said chamber only after with, means-to guideleads to-"the bore of said the latter has been advanced a predetermined member from said chamber, the forward end'of 40 distance, a shell slidably mounted 'in'said casing said member comprising means for releasably" and surrounding said chamber and member, the gripping a lead, in said member, means whereby. forward end of said shell being formed to provide sliding of said chamber towards the front end grippingmeans, said connection between said of saidpencil .advancemsaid member and the member and said chamber being engageable with lead gripped thereby, means for temporarily 'resaid shellto advance the-same and said gripping leasing said lead'upon the sliding'of-said chamber means after, the advance of said memberhas J sand member in the opposite direction untilthe commenced. r chamber and memberhave assumed their orig-' 3. A pressure feed pencil including a casing, a inal positions, .a shell slidably mounted in;- said storage chamber for leads slidably mounted. in casing and surrounding said chamber and memsaid casing at therear end thereof, a tubular her, lead gripping means connected to the for- ,m'ember slidably mounted in said casingadiacent wardend of said shell, the rear end of said memsaid chamber and in axial alinement therewith, ber extending into said chamber .and being-outmeans to guide leads to the bore of said member wardly flared to provide a funnel-shapedbottom from said chamber, the forward end of said memtherefor, a connecting member extending trans-' '5 her comprising means for releasably gripping a. versely across the lowerend'of. said chamber be'-'.

lead.in said member, means whereby sliding on, low said flared end of. said tubular ember, a said chamber towards the front. end'of said penstop on said tubular, member below nd spaced. cil advances said member andthe lead gripped from said connecting member and engageable thereby, means for temporarily releasing. said therewith after said chamber has beenadvanced 00 lead upon the sliding of said chamber and. mem-. a predetermined distance wherebynfio cause said her in the opposite direction until the chamber tubular member'to be advanced with said chains, and member have assumed their original posiber thereafter, the ends of said connecting memtions; the rear end of said member extending ber extending beyond said chamber, andbeing into said chamber and being, outwardlyflared engageable with said shell to advance the same 05 to provides. funnel shaped bottom therefor, a after said chamber has been advanced a predeconnectingmeniber extending transversely across termined distance, said connecting member be the lower end of said chamber below said flareding engageable with said flared end of said emuend of. said tubular member, a stopion said tubu-a lar member and-also with said shell to retract lar member below and spaced from said connectthe twain after said chamber has beenretracted 7b ing member and engageable therewith after said a predetermined distance. I f

. I chamberhas been advanced apredetermineddis-T 6. In a pressure feed pencil, a-ratchet, 'tance whereby to cause said'tubular member to slidably-mounted in said pencil for limited movebe advanced with said chamber thereafter. I ment axially thereof, a hollowgspi'i'ngactuated, 4. Apiessui'e feed pencil including a casing. a slidable lead gripping ratchettonglwithin said I storage ,chamber for leads slidably mounted, n, pencil and extending through said rings spring",

actuated lead gripping means slidably connected to one end of said-pencil forwardly of saidtong, springs for actuating said means and tong, means for feeding axially alined leads to said gripping meansthrough said hollow tong, said mounting means for said ring comprising a tube mounted in said pencil adjacent the front end thereof, a

Y portion of the bore of said tube being enlarged to provide a limited slideway for said ring, said lead advancing meansincluding a shell surrounding said tong and tube and connected to said lead gripping means, said shell being formed to provide apertures therethrough in the region of said tube, and means connecting said tube to said.

pencil through said openings in said shell, said connecting means-and opening being of a size to permit limited axial sliding movement, of said shell in said pencil.

'7. In a pressure feed pencil including an outer casing, a conical point at one end thereof, a lead storage magazine slidably carried by the other end of said casing'and a guide tube axially of said casing for guiding leads from saidrnagazine-to said point, the forward end of said tube terminating within said casing short of said point, means integral with said forward end of said tube for gripping a lead guidedby said tube,

and means carried by said casing and operative to actuate said gripping means to grip and advance a lead when said magazine is slid forwardly towards. said point, to actuate said gripping meansto release said lead when said magazine is slid rearwardly a predetermined distance and then to actuate said gripping means to re-grip said advanced lead to support the same in a writing position additional lead gripping means carried by said point, means for advancing said additional-lead gripping means duringa portion of the advance 'of said lead, and means for retracting said additional gripping means and lead tracted and has re-gripped said lead. I

8. In a pressure feed pencil including an'outer casing, a conical point at-one end thereof, a lead storage magazine slidably carried by the other end of said casing and a guide tube axially of said casing for guidingleads from said magazine .to said pointQthe forward end of said tube terminating within said casing short of said poin't,means integral with said forward end of after said first gripping means has been remagazine and. tube is slid rearwardly a predeand a ratchet ring carried by said casing and sur-' rounding said tube adjacent said forward end thereof, said ring being operative to actuate said gripping means to grip and advance a lead when said magazine is slid forwardly towards said point, to actuate said gripping means to release said lead when said magazine is slid rearwardly a predetermined distanceand thento actuate said gripping means tore-grip saidadvanced lead to S pport the same in a writing position'additional lead gripping means carried by said point, means for advancing said additional lead gripping means during aportion of the advance of said. lead. and means for retracting said additional gripping means and lead after said first gripping means has been retracted and has re-gripped said lead. 9. In a pressure feed pencil including'an outer' casing, a conical point at one end thereof, a lead storage magazine slidably carried by the other end of said casing and a guide tube axially of said casing for guiding leads from said magazine to said point, the forward end ofsaid tube terminating within said casing short of said point, said forward end being slotted to provide lead gripping tongs, cam surfaces on' the peripheries of said tongs, and means carried by said casing and normally engaging said surfaces to cause said tongs to grip a lead guided by said tube to support the same in ,a writing position and to advance said lead when said magazine is slid forwardly, but said means temporarfly disen-- gaging said surfaces .to permit said tongs to release? their grip on an advanced lead while said termined. distance over said advanced'lead additional lead gripping means carried by said point, means for advancing said additional lead gripping means during a portion ,of the advance, of said lead, and means for' retracting said additional 40 gripping, means and lead after said tongs have been retracted and have re-g'ripped said lead.

10. The structure of claim 9, said means com- "prising a ratchet ring carried by said casing and said tube for gripping a lead guided by saidtube,

surrounding said slotted end of said tube, said. ring being slidable relative to said-casing and tube, and means actuating said ring to engage 1 and disengage with said cam surfaces as aforesaid. 1

- KURT I 'END. 5ov

Images