[go: up one dir, main page]

US2184911A - Pressure feed pencil - Google Patents

Pressure feed pencil Download PDF

Info

Publication number
US2184911A
US2184911A US187977A US18797738A US2184911A US 2184911 A US2184911 A US 2184911A US 187977 A US187977 A US 187977A US 18797738 A US18797738 A US 18797738A US 2184911 A US2184911 A US 2184911A
Authority
US
United States
Prior art keywords
ratchet
lead
tong
point
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US187977A
Other languages
English (en)
Inventor
Fend Kurt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2184911A publication Critical patent/US2184911A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/22—Writing-cores gripping means, e.g. chucks

Definitions

  • 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
  • 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,
  • 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.
  • 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.
  • 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.
  • 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-
  • 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.
  • 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.
  • 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.
  • 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
  • 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 ⁇ .
  • the shell [4- 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
  • 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
  • T On the tube part 42-.
  • the tong tube 35 is slidably mounted a 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.
  • 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.
  • the I inner diameter of the tube 24 corresponds to the diameter of the lead.
  • 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;
  • 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.
  • 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 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 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.
  • 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
  • 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.
  • FIG. 1 shows the position of all parts at the conclusion of the feeding movement.
  • 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.
  • 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.
  • 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 ratchet point 34 is drawninto the forward chan aus'ed by the ratchet. way of the ratchet tongo the first form.
  • mediate casing 3 positionedwithin, whose reduced fro'n'tend .4 has an internal thread 4, in which aconical point 53' has-been screwed.
  • 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.
  • 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,
  • 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.
  • 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
  • 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
  • a pressure feed pencil including a casing, a inal positions, .a shell slidably mounted in;- said storage chamber for leads slidably mounted.
  • 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'-'.
  • 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-.
  • 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 chamber has been advanced apredetermineddis-T 6.
  • 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
  • said lead advancing means including 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.
  • said connecting means-and opening being of a size to permit limited axial sliding movement, of said shell in said pencil.
  • 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,
  • 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.
  • 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.
  • 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?
  • said means com- "prising a ratchet ring carried by said casing and said tube for gripping a lead guided by saidtube,

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US187977A 1937-04-29 1938-01-31 Pressure feed pencil Expired - Lifetime US2184911A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200698X 1937-04-29
DE131037X 1937-10-13

Publications (1)

Publication Number Publication Date
US2184911A true US2184911A (en) 1939-12-26

Family

ID=25751766

Family Applications (1)

Application Number Title Priority Date Filing Date
US187977A Expired - Lifetime US2184911A (en) 1937-04-29 1938-01-31 Pressure feed pencil

Country Status (4)

Country Link
US (1) US2184911A (de)
CH (1) CH200698A (de)
FR (1) FR830448A (de)
GB (1) GB494932A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626592A (en) * 1946-07-20 1953-01-27 Edwin C Hedler Mechanical push-type lead pencil
US4343558A (en) * 1979-07-31 1982-08-10 Yugen Kaisha Tokyo Kinzoku Seisakusho Mechanical pencil
US4571105A (en) * 1983-10-03 1986-02-18 Pentel Kabushiki Kaisha Lead engaging chuck mechanism for mechanical pencil
US4650359A (en) * 1984-04-27 1987-03-17 Pentel Kabushiki Kaisha Mechanical pencil with automatic lead advance
US4998837A (en) * 1985-05-23 1991-03-12 Kotobuki & Co., Ltd. Lead cartridge with an openable capping structure
EP1285780A2 (de) * 2001-08-13 2003-02-26 Kotobuki & Co. Ltd. Füllminenstift

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081800B (de) * 1955-02-19 1960-05-12 Karl Heinrich Heinz Druckfuellstift mit automatischer Minenfolge
WO2001074603A1 (fr) * 2000-03-30 2001-10-11 Pentel Kabushiki Kaisha Porte-mine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626592A (en) * 1946-07-20 1953-01-27 Edwin C Hedler Mechanical push-type lead pencil
US4343558A (en) * 1979-07-31 1982-08-10 Yugen Kaisha Tokyo Kinzoku Seisakusho Mechanical pencil
US4571105A (en) * 1983-10-03 1986-02-18 Pentel Kabushiki Kaisha Lead engaging chuck mechanism for mechanical pencil
US4650359A (en) * 1984-04-27 1987-03-17 Pentel Kabushiki Kaisha Mechanical pencil with automatic lead advance
US4998837A (en) * 1985-05-23 1991-03-12 Kotobuki & Co., Ltd. Lead cartridge with an openable capping structure
EP1285780A2 (de) * 2001-08-13 2003-02-26 Kotobuki & Co. Ltd. Füllminenstift
EP1285780A3 (de) * 2001-08-13 2004-04-14 Kotobuki & Co. Ltd. Füllminenstift

Also Published As

Publication number Publication date
GB494932A (en) 1938-11-03
CH200698A (de) 1938-10-31
FR830448A (fr) 1938-07-29

Similar Documents

Publication Publication Date Title
US2400679A (en) Fountain pen
US2184911A (en) Pressure feed pencil
US4171170A (en) Automatic pencil
US2484640A (en) Mechanical pencil
DE1561781C3 (de) Füllbleistift
US1969085A (en) Automatic lead pencil
US2469411A (en) Mechanical pencil
US2203160A (en) Magazine pencil of the type comprising a lead-conveying tube
DE2160306A1 (de) Minenstift mit druckmechanik
US2049965A (en) Lead pencil
US2385442A (en) Pencil
US1967484A (en) Mechanical pencil
US2563551A (en) Pencil
US2179835A (en) Step-by-step lead pencil
US2848969A (en) Solder feeder
US1908386A (en) Mechanical pencil
US1886371A (en) Pencil
US1700246A (en) Step-by-step lead pencil
US2583069A (en) Mechanical lead pencil with finger operable lead projecting and retracting means
US2700959A (en) Mechanical pencil
US2082844A (en) Mechanical pencil
US1846604A (en) Magazine pencil
DE802797C (de) Fuellbleistift mit feststehender Spitze
US2030025A (en) Mechanical pencil
US2503080A (en) Mechanical pencil with push-button type lead feeding means