US2469411A - Mechanical pencil - Google Patents

Mechanical pencil Download PDF

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Publication number
US2469411A
US2469411A US628063A US62806345A US2469411A US 2469411 A US2469411 A US 2469411A US 628063 A US628063 A US 628063A US 62806345 A US62806345 A US 62806345A US 2469411 A US2469411 A US 2469411A
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US
United States
Prior art keywords
tube
lead
housing
sleeve
pencil
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
US628063A
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English (en)
Inventor
Jesse J Robbins
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.)
STYLOFEDE Corp
Original Assignee
STYLOFEDE CORP
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
Priority to BE488936D priority Critical patent/BE488936A/xx
Application filed by STYLOFEDE CORP filed Critical STYLOFEDE CORP
Priority to US628063A priority patent/US2469411A/en
Application granted granted Critical
Publication of US2469411A publication Critical patent/US2469411A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B43K21/04—Writing-core feeding mechanisms with the writing-cores brought into position by gravity
    • B43K21/045—Writing-core feeding mechanisms with the writing-cores brought into position by gravity with writing-cores automatically replaced from magazines
    • 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

Definitions

  • My invention relates rto :pencils and more particularly t-o the mechanical type of pencil whereby when the lead is broken or used np, it can be replaced, and when worn can be extended to provide a satisfactory'writing point.
  • My object in this invention is to provide a mechanical pencil obviating the above difliculties by iirst incorporating a feed mechanism within the pencil which enables the writer to refresh the lead point of the pencil by the mere expedient of pressing the pencil point upon the writing surface, said pressing being competent to cause an extending of the lead from the pencil to provide a writing point, and second, constructing my pencil so that upon the using up of the piece of lead being .used for Writing, an automatic gravity feeding of the lead is accomplished whereby lead moveslgravitationally from the storage compartment of the pencil into the feed mechanism of the pencil and .is thereby positioned for extension to provide a writing point in the manner .previously described.
  • Fig. 1 shows a .side view of my pencil and .of the case enclosingthe same;
  • Fig. 2 is across section takenthrough the longitudinal laxis of ⁇ my pencil showing the feeding mechanism in its ordinary writing position;
  • Fig. 3 is a cross section taken through the longitudinal ⁇ axis iof my pencil showing the feeding mechanism in the position it assumes upon pressing the pencil ⁇ against the Writing surface ⁇ during the leadlpoint extending operation;
  • Fig. 4 is a cross section taken along the line Irl- 4 of Fig. 3;
  • Fig. 5 is an exploded View of a'portion of the L, feeding -mechanism of my pencil.
  • Fig. 6 is an enlarged .longitudinal cross section of .my pencil takenon the line 6--6 of Fig. 2 showing the ylead ingripped position
  • Fig. '7 is .an enlarged longitudinal cross section of my pencil taken on the line l--l of Fig. 3 showing .the .lead free to gravitate or drop during the lead extending operation.
  • the upper part l of my pencil comprising clip, eraser andthe like, is threaded to screw over the housing .2, which :itself is threaded and which has about its threaded end the threaded collar 3.
  • the .housing 2 has its lower end 4 interiorly threaded :to receive the threaded bushing 5, ⁇ the threaded bushing 5 being threaded at its lower end to ,carry thereon the tapered head 6, the upper end l of rwhich is likewise interiorly threaded.
  • ⁇ .Sliding within the bushing 5 is the tube .8 which, at its lower end 9, is exteriorly threaded to .carry the lpencil point housing IU.
  • the point housing I0 has ⁇ as apart thereof the flange l2, against which abuts the compression'spring lA, the-otherend of said compression spring I4 abuttingagainsta shoulder at the end I6 of the axial bore ,l8.in.the bushing.
  • the point housing 'Ill - is carried threadably on the tube '8 in slidable relationship .to Athe tapered head 6 .and the compression spring I4 is interposed between the said .LlJoint housing Il) :and the bushing 5.
  • the tube 8 is not only slidable With relation to the bushing 5, but is also connected therewith through the compression spring I4.
  • the tube 8 Adjacent its lower end 9, the tube 8 has the flange 26 which forms a shoulder against which the point housing I6 abuts, and above this the outside diameter of the said tube 8 is increased at 22 to form the slidable fit within the bushing 5.
  • the uppermost end 24 of the tube 8 is flattened and squared and has drilled therein the bores 26 which receive the stub shafts 28. Pivotally mounted at their center points on the said stub shafts 23 are the levers 36.
  • the levers 30 are bored to receive the shaft 32 which carries rotatably the bifurcated link 34.
  • the bifurcatedlink 34 at its lower extremities, pivotally connects to the bushing 5 by the stub shafts 36.
  • the levers 30 are bored to receive the shaft ⁇ 38 which rotatably carries a second bifurcated link 46.
  • the levers 30 and links 34 and 46 form a toggle joint or toggle lever means and the bifurcated link 40, at its upper ends, is pivotally connected through the stub shafts 42 to the flanged sleeve 44.
  • the flanged sleeve 44 is axially bored to receive the split tube 46 which passes through the tube 8 and which carries thereon a second sleeve 48, the bore of said sleeve being tapered at its lower end. It will also be noted that the bore of the flanged sleeve 44 is likewise tapered at its upper end.
  • the sleeve 48 rides at its lower end within an axial bore in the point housing I U, said axial bore in the point housing I commencing of' a diameter slightly larger than the lead 50 and expanding in conical manner to the shoulder 52.
  • the point housing I6 is thereabove provided with the constant diameter bore 54 up to the seat 56 and the enlarged bore 58.
  • the sleeve 48 slides in the bore 54, and a compression spring 59 is accommodated in the bore 58 which abuts against the seat 56 on the one hand and the flange 6I) on the sleeve 4 8 on the other.
  • the flange 60 is of a size to be slidably received in the bore 62 of the tube 8 which ends in the shoulder 64.
  • the split tube 46 has an enlargement or flange 66 which slides within the increased bore 61 of the tube 8 and which abuts against the ange 68 of the sleeve 46, and which may abut against the shoulder 68 in the said tube 8.
  • the split tube 46 is adapted to receive the lead piece 50 and a further lead piece 69.
  • Several lead pieces of different lengths occasioned by possible breaking of the lead may abut against each other within the split tube 46 without interfering with the operation of my pencil as will later be apparent.
  • the split of the said split tube is wider and I contemplate a second splitting at these portions, across from the first. This results in the ends of the split tube having, as it were, four fingers which, as the sleeve 48 and the flanged sleeve 44 approach each other, facilitate the gripping of the lead and provide a clutch device.
  • the flanged sleeve 44 is itself split or slotted at 'I4 up to the flange 88 and such slot is adapted to receive the wing-s i6, a part of the split tube 46.
  • the wings 'I6 as shown in Figure comprise diverging ears forming a part of and extending transversely of the split tube 46.
  • the slot 14 which extends through 4 the flange 'I8 up to the flange 80, permits the telescoping of the split tube 46 into the flanged sleeve 44 without interference caused by the said ears 76, the said ears 'I6 riding within the said slot 14, their upward movement with relation to the flanged sleeve 44 and consequently the upward movement of the split tube 46 being limited by the flange 86 which thus acts as a limiting stop.
  • the flange 82 at the top of the flanged sleeve 44 is of an outside diameter suitable to slidably ride within the housing 2 and thus hold the feeding mechanism in alignment.
  • the flange 82 which has a conically depressed top surface, likewise provides the base for the storage compartment 84 which contains the extra leads 86.
  • Figs. 2 and 6 are drawn with the feeding mechanism in writing position.
  • the leads 58 and 69 are held rigidly in the split tube 45 by the action of the sleeve 48 and the flanged sleeve 44 on the split tube fingers at the extremities I8 and l2 of the said split tube 46.
  • the sleeve 48 is urged into coaction with the fingered extremity l' by the compression spring 59 which abuts against the seat 56 and the flange 66, thus causing the split tube 46 to grip the lead.
  • the flanged sleeve 44 is urged to coact with the said fingered extremity 'i2 by virtue of the lever action of the bifurcated link 46, the lever 36 and the bifurcated link 34, the said bifurcated link 34 being pivotally mounted on the bushing 5 which is abutted against by the large compression spring I4.
  • the large compression spring I4 abutting against the flange I 2 of the point housing I6, urges the bushing 5 and the point housing Ill apart with respect to each other.
  • the pencil is merely pressed point down upon the writing or any other surface.
  • the lead point 5U which is gripped by the split tube 46, causes the said split tube to rise in the tube 8 against the compression spring I4, which acts through the flanged sleeve 44 and the lever system.
  • the tube 48 of course, follows the flange 66 of the split tube 46 by virtue of the compression spring 59.
  • the hanged sleeve 44 carries the split tube 46 downwardly and, of course, the lead.
  • the flange 66 abutting against the flange 60 of the sleeve 48 moves the said sleeve 48 downwardly against the compression spring 59 until the said sleeve 48'rests in seat 52.
  • This movement is, y ⁇ of course, Vby virtue of the fact that the compression spring I4 overpowers the compression 'spring 59.
  • the lead point 56 which, in the last-mentioned movement, is gripped by the split tube 46 is extended from the point housing I0.
  • a device of the class described comprising: a housing; a bushing in said housing rigid with respect to said housing; a second housing slidable within said rst housing; resilient means between said first and said second housings; a tube threaded in said second housing; said tube being slidable within said bushing; a lead receiving tube slidable within said nrst tube; lower clutch means adapted to releasably grip said lead, said clutch means comprising a lower sleeve slidable on said lead receiving tube, said sleeve having a tapered bore, and nge 1s comprising the lower extremity of said lead receiving tube; upper clutch means adapted to releasably grip said lead, said clutch means comprising an upper sleeve slidable on said lead receiving tube, said sleeve having a tapered bore, and nngers comprising the upper extremity of said lead receiving tube; and lever means associated with said bushing, said upper sleeve and said first
  • a device of the class described comprising: a housing; lead feeding mechanism slidable within said housing, said lead feeding mechanism including a lead receiving tube, upper clutch means co-acting with said lead receiving tube to cause said lead receiving tube to grip lead therein, and lower clutch means co-acting with said lead receiving tube to cause said lead receiving tube to grip lead therein; and a lever system operatively connected with said upper clutch means and said lower clutch means to actuate said upper and lower clutch means.
  • a device of the class described comprising: a housing; lead feeding mechanism slidable within said housing, said lead feeding mechanism including a lead receiving tube, and clutch means co-acting with said lead receiving tube to cause said lead receiving tube to grip lead therein or to allow said lead receiving tube to permit lead to slide freely therethrough; spring means providing resilient relationship between said housing and said feeding mechanism; and lever means operatively connecting said housing and said lead feeding mechanism, said lever means coacting with said spring means normally to encourage co-action between said clutch means and said lead receiving tube, said lever means being adapted to release said lead receiving tube from said clutch means when said housing is moved downwardly in relationship to said lead feeding' mechanism.
  • a device of the class described comprising: a housing; a second housing slidable within said first housing; lead feeding means within said rst and second housings, said feeding means including a lead receiving tube, upper clutch means coacting with said lead receiving tube and lower clutch means co-acting with said lead receiving tube; a spring providing resilient relationship between said second housing and said iirst housing; a second spring providing resilient relationship between said second housing and said lower Aclutch means; and alever-operatively connectl8 means, said two springs and said lever normally combining to urge said upperand said lower clutch means into co-action with said lead receiving tube to cause the gripping thereby of lead therein,
  • a device of the class described comprising: a housing; a bushing in said housing rigid with respect to said housing; a second housing slidable within said first housing; resilient means between said rst and said second housing; a tube threaded in said second housing, said tube being slidable within said bushing; a lead receiving tube slidable within said tube; lower clutch means adapted to releasably grip said lead, said clutch means comprising a lower sleeve slidable on said lead receiving tube, said sleeve having a tapered bore, and fingers comprising the lower extremity of said lead receiving tube; upper clutch means adapted to releasably grip said lead, said clutch means comprising an upper sleeve slidable on said lead receiving tube, said sleeve having a tapered bore, and ngers comprising the upper extremity of said lead receiving tube; a lever system comprising a bifurcated link pivotally connected with respect to said first housing, a lever pivotally connected to said first
  • a device of the class described comprising: a housing; lead feeding mechanism slidable within said housing, said lead feeding mechanism including a lead receiving tube, and upper clutch comprising an upper sleeve slidable on said lead receiving tube, said sleeve having a tapered bore, and iingers comprising the upper extremity of said lead receiving tube, and a lower clutch comprising a lower sleeve slidable on said lead receiving tube, said sleeve having aftapered bore and lingers comprising the lower extremity of said lead receiving tube; and a lever system operatively connecting said upper and lower clutches to cause said clutches to grip said lead.
  • a device of the class described comprising: a housing; a lead feeding mechanism within said housing, said lead feeding mechanism including a lead receiving tube, fingers at the upper eX- tremity of said lead receiving tube, an upper sleeve slidable on said lead receiving tube and having a tapered bore, fingers at the lower extremity of said lead receiving tube, and a lower sleeve slidable on said lead receiving tube and having a tapered bore.
  • a mechanical pencil comprising, elongated housing, tube means mounted for longitudinal reciprocation within said housing and having one end extendable from and retractible with respect to one end of said housing and being formed with a lead exit opening, a spring connected to the said housing and tube means and urging and normally positioning said tube means end in extended position from said housing end, a lead tube slidably carried by said tube means for relative longitudinal movement and in registration with said exit opening, said lead tube having a normal diameter permitting the free passage of lead therethrough and being compressible for gripping lead positioned therein, a clutch sleeve slidably mounted upon said lead tube and within said tube means and having a tapered bore wall engageable with said lead tube for compression thereof upon movement of said lead tube to said wall, a second spring normally urging said: leadi tube into engagementwith, said wall; and means ⁇ connected; to said: housingand tube means and lead tube.. and actuated; upon movement, ofv said tube. means end: toward said housing against the. resistance. of said. -rstspring to displace
  • an elongated pencil housing, a tube. mounted: for reciprocation in said housing and having ⁇ a pointed end formed. with a lead discharge opening extendable from. and retractiblewith respect to one end of saidj housing, a lead tube-v slidably mounted within said first tube in registration with said opening and having a normal diameter permitting the free.. passage ofv lead. therethrough and being compressible. for gripping lead therein, a clutch sleeve mountedwithinV said first tube. andY surrounding said lead.
  • an elongated pencil housing a tube slidably mounted within said housing for longitudinal reciprocation and havingy a pointed lead,y supporting end extendable from and retractible with respect to one end of said housing, a lead tube slidably mounted within said rst tube and having a normal diameter permitting the free passage of lead therethrough and being compressible for gripping lead therein, a clutch sleeve surrounding said second tube, said second tube being movable relative to said clutch sleeve to positions relatively compressing and releasing said second tube, spring means urging and normally positioning said rst tube end in extended position from said housing end and said second tube in compressed position within said sleeve, a lever pivoted intermediate its ends to said rst tube and having one end pivotally connected into said housing and its other end pivotally connected to said second tube and functioning upon displacement of said first tube end toward said housing end to eiect a movement of said second tube to released position with respect to said sleeve thereby permitting
  • an elongated pencil housing a tube slidably mounted within said housing for longitudinal reciprocation and having a pointed lead supporting end extendable from and retractible with respect to one end of said housing, a spring connected between said housing and tube and urging the extension of said tube end, a lead tube slidably mounted within said first tube and having a normal diameter permitting the free passage of lead therethrough and being split for compression at an end adjacent to said first tube end for gripping lead therein, a clutch sleeve having a tapered bore slidably mounted upon said second tube end and within said first tube, means limiting the relative longitudinal movement of said sleeve in said rst tube, a lever pivoted intermediate its ends to said first tube and having one end pivotally connected to said housingv and; its other.- end: pivotally con.
  • an elongated pencil housing a tube. slidably mounted within said housing for longitudinal. reciprocation and having a pointed lead. supporting end extendable from and retractible with respect to one end of said. housing, a spring connected between said housing and tube andurging the extension of said tube end, a lead tube! mounted for longitudinalmovement within said rst tube and having a normal diameter permitting the free. passage of leadtherethrough, the. opposite ends of said second tubebeing compressibleto grip lead therein, a pair ofv clutch sleeves mounted on the opposite ends of said second tube and movable with respect thereto between positions compressing andreleasing said second tube ends, a lever pivotally. mounted intermediate its ends to said, rst tube, a link pivotally securing.
  • an elongated pencil housing having an open lower end, a tube slidably mounted within said housing for longitudinal reciprocation and having a pointed lower end extendable from and retractible with respect to said housing end, a spring corinected between said housing and tube and urging the extension of said tube end, a lead tube slidably mounted within said rst tube and having a lower end adjacent the lower end of said rst tube and an upper end extending from the upper end of said rst tube, said second tube having a normal diameter permitting the free passage of lead therethrough and being split at its upper and lower ends to permit compression of said tube ends for gripping lead therein, clutch sleeves having tapered bores mounted on the upper and lower ends of said second tube and having first positions thereon compressing said 4second tube ends and second positions thereon releasing said ends to permit passage of lead therethrough, and a lever pivoted to said first tube and operatively connected to said housing and said second tube and sleeves to position the latter in said rst position in the normal
  • a lead feeding unit for mechanical pencils including a pair of lead gripping clutches mounted spaced apart in longitudinal relation to each other, toggle lever means connecting said clutches, said lever means 4being pivoted between its ends whereby when pressure is exerted against the writing end of said unit said clutches are released to permit a writing lead to slide freely in said clutches and when the pressure is released the writing lead is automatically ejected out of the writing end a predetermined degree and said clutch unit grips the lead firmly in writing position.
  • a mechanical pencil including a lead reservoir for a supply of writing leads, a lead feeding unit mounted in the forward end of said pencil below said lead reservoir, said unit including a pair of longitudinally spaced lead gripping clutches through which the writing lead slides from said reservoir, a pair of toggle levers interposed between and pivotally connected to said pair of clutches and spring means normally spacing said pair of clutches toward each other and adapted to permit the writing end of said unit to be de ⁇ pressed into the barrel of said pencil and to vsimultaneously release said clutches to permit a writing lead to slide freely from said reservoir into said clutch unit, said clutch unit being adapted to grip the lead fed into it and eject the same a predetermined degree out of the writing end of said unit when pressure is released on the writing end of said clutch unit.
  • a mechanical p'encil comprising a lead reservoir, an automatic lead feeding clutch unit, means in said unit for receiving a writing lead from said reservoir and ejecting the same a predetermined degree at a time by pressure against the writing end of said pencil and unit and including said lead feeding unit including a pair of longitudinally spaced apart clutch means which reciprocate to receive and eject the writing lead, toggle lever means connecting said clutch means of said unit to cause said clutch means to operate in unison when pressure is exerted against the writing lead to release the same and to automatically grip the lead and force it into writing position a degree at a time when pressure at the writing end is released and spring means for normally holding said clutch means toward each other.
  • a mechanical pencil including a lead reservoir for eXtra writing leads, a clutch feeding unit having a writing end projecting from the barrel of said pencil, said unit including longitudinally spaced means for gripping and releasing a writing lead by the action of clutch means, Ispring means for normally holding said clutch means in gripping position and lever means connecting said clutch means in a manner to cause the same to operate in unison and be released from gripping the lead when pressure is exerted against the writing end of said pencil and to grip the lead and hold it in projecting writing position lwhen pressure on the Writing end of the pencil is released.

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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US628063A 1945-11-13 1945-11-13 Mechanical pencil Expired - Lifetime US2469411A (en)

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BE488936D BE488936A (en)) 1945-11-13
US628063A US2469411A (en) 1945-11-13 1945-11-13 Mechanical pencil

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865330A (en) * 1954-11-26 1958-12-23 Everett R Swank Writing instrument
US2911948A (en) * 1956-10-26 1959-11-10 Novera H Spector Mechanical pencil with an automatic feed mechanism
US4452544A (en) * 1981-04-28 1984-06-05 Pilot Precision Kabushiki Kaisha Mechanical pencil with automatic lead feed
US5004362A (en) * 1990-05-29 1991-04-02 Leon Robert Palmer Mechanical pencil
EP1475244A1 (en) * 2003-05-07 2004-11-10 Spring Stationery Products Co., Ltd. A propelling pencil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056143A (en) * 1932-10-29 1936-09-29 Stylofede Corp Pencil
US2078433A (en) * 1935-12-18 1937-04-27 Winter Arthur Lead feeding pencil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056143A (en) * 1932-10-29 1936-09-29 Stylofede Corp Pencil
US2078433A (en) * 1935-12-18 1937-04-27 Winter Arthur Lead feeding pencil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865330A (en) * 1954-11-26 1958-12-23 Everett R Swank Writing instrument
US2911948A (en) * 1956-10-26 1959-11-10 Novera H Spector Mechanical pencil with an automatic feed mechanism
US4452544A (en) * 1981-04-28 1984-06-05 Pilot Precision Kabushiki Kaisha Mechanical pencil with automatic lead feed
US5004362A (en) * 1990-05-29 1991-04-02 Leon Robert Palmer Mechanical pencil
EP1475244A1 (en) * 2003-05-07 2004-11-10 Spring Stationery Products Co., Ltd. A propelling pencil

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Publication number Publication date
BE488936A (en))

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