US2781722A - Type group and type selecting means for wheel printers - Google Patents

Type group and type selecting means for wheel printers Download PDF

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Publication number
US2781722A
US2781722A US505866A US50586655A US2781722A US 2781722 A US2781722 A US 2781722A US 505866 A US505866 A US 505866A US 50586655 A US50586655 A US 50586655A US 2781722 A US2781722 A US 2781722A
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United States
Prior art keywords
clutch
type
cam
group
arm
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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
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US505866A
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English (en)
Inventor
Donald H Apgar
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International Business Machines Corp
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International Business Machines Corp
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Publication date
Priority to NL206791D priority Critical patent/NL206791A/xx
Priority to BE547521D priority patent/BE547521A/xx
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US505866A priority patent/US2781722A/en
Priority to CH338632D priority patent/CH338632A/fr
Application granted granted Critical
Publication of US2781722A publication Critical patent/US2781722A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers
    • B41J1/40—Carriers swinging for impression
    • B41J1/42—Carriers swinging for impression about an axis parallel to the axis of rotation of the carrier

Definitions

  • This invention relates to wheel printing mechanisms in general and more particularly to the type wherein position to unlatch alower pull rodwhich controls the type group selecting clutch to initiate rotation of the Thefour analyzer slides are under control of four analyzer cams which have such formations that the lower pull'rod is only 1unlatched at a delayed time in the cycle. This delay in engagement of the type group selecting clutch occurs for single holes 9-1 and combinational holes'8-4, 8-3.
  • a clutch release arm for a single revolution delay clutch-isengaged at differential times as aresu'lt of the energization of a print control magnet in accordance with the holes 9-1 and said delay clutch is provided with a cam disk-having a cam portion effective as the clutch terminates its rotation and in delayed points in the cycleto actuate a clutch release arm of the type group printing wheel clutch to select groups of type associated with theholes 9--1.
  • Another object, according to the invention, is to devise such cam disk with two other cam portions which, as
  • 8 holeis analyzed causes'the clutch release armvto be actuated at either the a or 4 card hole impulse time to therebycause the type group selecting clutch to select type groups allocated to 8-3 or. 8-4combinational holes.
  • Astill further object is to devise the above described construction in such manner that it is capable of being incorporated in commercial 407 Accounting Machines marketed by thelnternational Business Machines Corporation and shown in the aforesaidU. S. Patent No.
  • a still further object is to provide an interlock in the form'of-a cam which-prevents the actuation of said clutch release armfor said delay clutch when 0, X, R' holes are being analyzed, andto release said clutch release arm for actuation by said print control magnet upon its energization by the 9-1 holes.
  • Figs. la and 1b when assembled in this order comprise a transverse sectional view through the machine showing the construction of the improved alpha-numeric punctuation and symbol printing mechanism.
  • Fig. 2 is a diagram showing in the outer circle the type on the printing wheel as they .are arranged in' groups, the next inner circle showing the particular 0, X, Rzone holes or N pulse which select the type in each group, andthe innermost circlethe particular card holes which either singly or in combination select the groups er type.
  • Fig. 13 is a timing diagram of.the machine.
  • the present improvements are directed to a simplification of the means for selecting a group .oftype and a desired type in a' selected groupdisclosed in the patent to R. E. Page et al. No. 2,438,071.
  • the type wheel 45 (see Fig. 2) carrying 48 type is provided withall of ,thedigit type 09,.a complete set of alphabetic characters,
  • Each group of type consists of fourtype, grouped as diagrammatically shown in Fig. 2. 7
  • the printingimpression will be taken at the N point in the machine cycle, which point is after the R index point position (see .Fig. 3 for timing of the N impulse).
  • the alphabet type of the selected group are selected by the 0, X and R zone holes. For example, ifvthe hole should be at the 2position and no zone hole is present, the digit 2 willbe printed. If a zone hole is at the 0 index point, such hole will select the type S; if at.the
  • index point typeK will be selected, and if at the R index point position type .B will be selected.
  • a'printing wheel 45 (Fig, lb) will be rotatedcounterclockwise until the Zffltype is at the fprintingjline, and then the printing wheel 45 will be rocked asa result of the pulseto effect printing from the 2 type. It ,will be noted that if a zone hole is at the R posit ions,.thenundercontrolof the R zonehole the printing wheel 45 will be rocked earlier than for printing the digit 2,,t -o take animprint from theB type. The zone hole at the .X position will cause the printing wheel 45 to be rockedstill earlier to take an-imprint from theK typepandeazonehole at theO, index point positionstill earlier,to;,print,from the S type.
  • the card is fed past suitable analyzing mechanism to analyze the index points in the order 9, 8, 7, 6, 5, 4, 3, 2, l, 0, X and R.
  • suitable analyzing mechanism to analyze the index points in the order 9, 8, 7, 6, 5, 4, 3, 2, l, 0, X and R.
  • an analyzing brush senses a hole by circuits shown in U. S. Patent No. 2,438,071 in any of the above index point positions in a column, a circuit is closed to a printing control magnet 10 (Fig. 1a), and for each card column there is a printing control magnet 10.
  • a magnet 10 When a magnet 10 is energized it attracts its related armature 11 against the force of a return spring 12 so that a lug 13 at the extremity of armature 11 is removed from a shoulder 14 of a related link 16 which is suitably guided for a reciprocating movement.
  • a compression spring 15 fitting in a spring support and guide block for link 16 urges link 16 to the left, and when such spring 15 is effective for action under control of a cam 17, it serves at times as a source of a mechanical impulse transmitted to link 16 to rock a clutch release arm 59, 60, 61 to cause type group selection.
  • a follower arm 19 Pivoted on a rod 18 is a follower arm 19 having its rounded end received by a semi-circular notch 20 in a related link 16, said follower arm 19 thus being connected to link 16 is also urged by spring 15 to cooperate with cam 17.
  • Said cam 17 is provided with a series of notches 17a, one for each index point analyzed and also for the N pulse. Said notches 17a are each registered with the follower extension 22 of follower arm 19 shortly after the index points on the card are analyzed.
  • spring 15 is effective, if magnet 10 is energized, to cause projection 22 of arm 19 to enter a notch 17a, rock arm 19 counterclockwise to shift rod 16 to the left to rock the clutch release arm 59, 60, 61 to engage a delay clutch in a manner to be presently described.
  • Said cam 17 is, with the exception of its timing and formation of notches, substantially like earn 125 of Patent No. 2,438,071.
  • cam 125 In said patent thetiming of cam 125 enables it to function as a delay cam, whereas in the present arrangement it is timed to be effective on the pull rod 16 substantially synchronously with the card impulses transmitted to magnet 10.
  • Cam'17 is similarly driven by a shaft 153, as in said patented machine.
  • a shaft 29 (Fig. 1b) which is fluted transversely around its periphery to provide clutch notches 30.
  • Shaft 29 carries a plurality of gears 31, there being one gear 31 for each order of the. printing mechanism; the series of gears 31 loosely encircling the periphery of the drive shaft 29.
  • the gears are guided by guide slots 32 formed in guide bars 33 and 34.
  • the gears 31 are separated to allow independentrotation and to also locate a clutch pawl 36 which is pivoted by a stud 37 on the related gear 31 to cooperate with a related clutch release arm 40 pivoted on a rod 41.
  • the clutch release arm 40 normally holds the clutch pawl 36 in such position that its tooth 42 is held out of engagement with any of the clutch notches of the shaft 29.
  • the type group selecting clutch is engaged because a spring 44 attached to clutch pawl 36 will rock the latter to cause the clutch toot-h 42 to engage a particular clutch notch 30 determined by the differential time the clutch release arm 40 is operated by the delay clutch.
  • the above described clutch is the type group selecting clutch and causes the difierential rotation of the printing wheel 45 since the gear 31 and printing type of the associated type carrying wheel 45 are intergeared.
  • Each printing wheel 45 is carried by an arm 46 loosely pivoted on a rod 43 which is provided with a follower extension 47 which is engaged by a cam projection 48 of a cam disk 49 which is the print cam and constitutes a driven member of a printing clutch.
  • Pigs. in and lb show the arrangement of the printing devices for a single order and the machine is preferably provided with duplicate devices for printing a plurality of printing characters.
  • the delay clutches are driven by a reamer shaft 50 which is slotted transversely to provide a series of clutch notches 51.
  • a cam disk 52 Encircling the periphery of the shaft 50 is a cam disk 52, there being one cam disk for each printing order.
  • the cam disks 52 are separated to allow independent rotation and to also locate a clutch pawl 55 which is pivoted on a stud 56 on the cam disk so that its extremity is in the plane of and normally engaged by a hook portion 57 of a triple arm clutch release member consisting of arms 59, 60 and 61.
  • the clutch pawl 55 is provided with a clutch tooth 63 adapted to engage one of the clutch notches 51 dependent upon the time that the delay clutch is engaged and corresponding to the time that the first impulse is directed to the print control magnet 10.
  • the pull rod 16 is provided with a depending shoulder 65 abutting the upper end of the arm 59, it being obvious that when the pull rod 16 is moved to the left as a result of the unlatching by armature 11 of an energized magnet 10 and the position of cam 17 as previously described, the movement of the shoulder65 away from the arm 59 will enable aspring 66 to rock the triple arm clutch release member ,59, 60, 61 counterclockwise so that the hook 57 of the arm 60 will be disengaged from the clutch pawl 55.
  • a clutch pawl operating spring 63 will then be effective to rock the clutch pawl 55 to engage the clutch tooth 63 with one of the notches 51, the par ticular one which is'engaged being dependent upon the time that the magnet 10 is energized (see Fig. 3).
  • the timing conditions and delays in each clutch engagement are such that a digit impulse will cause the engagement of the clutch just prior to the time of the suceeding card impulse.
  • Reamer shaft 50 may be driven by the operating mechanism shown in the Page Patent No. 2,438,071 by any suitable gear drive mechanism so that it rotates two revolutions per cycleand synchronously with the other operating parts of the machine.
  • Each cam disk 52 is provided with a cam" edge 70 (Fig. 1a) which, in the clockwise rotation of cam disk 52, is sufficiently high to strike a follower roller 71 of a follower arm 72 pivoted on a stud 73 and rock said follower arm.
  • roller 71 will rest against a concentric high portion 75 of the cam disk, after which time roller 71 will drop to a slightly lower concentric portion 76 being urged to do so by a spring 77 acting upon the follower arm 72.
  • a projection 80 of the follower arm 72 will engage a shoulderfil of atriple arm member 82 to-hold the'follower arm 72 against'further clockwisemovement.
  • the present member 82 may be regarded as a-stop to hold follower arm 72 from being rocked clockwise any further, due to still lower cam portions'105 and 109 which are presented to the roller 71 in the'further clockwise rotationofcamdisk S2.
  • Cam edge 70 will ultimately engage the roller 71 of the follower arm 72, rocking it counterclockwise against the action of the spring 77.
  • a foot 83 of follower arm 72 will actagainst a cam edge 84 of an extension of clutch release arm 40, thereby rocking the clutch release arm-40 counterclockwise to disengage it from the clutch pawl 36 of the type group selecting clutch. This causes an engagement of thetype group selecting clutch and the initiation of rotation of printing wheel to select a desired group of type.
  • the differential time that cam disk 52 causes the engagement of the type group selecting clutch determines the extent of counterclockwise rotation of the printing wheel 45 to select a-group of type for printing between 300-345. mined extent of rotation of theprinting wheel 45 has beeneifected and after the printing impression has been made, with the type group selecting clutch still engaged, the printing wheel 45 will continue to rotate until the end of the clutch pawl 36 (Fig. 112;), strikes clutch arm h"; which, in the meantime, hasbeen brought s norrnar' position by means of a compression spring J. When such disengagement is effected the printing wheel 45 is inthe normal position shown in Fig. 1b and diagrammatically in Fig. 2.
  • the digit holes 9-1 select the, desired group of nine diiferent groups of types, each consisting of four type.
  • the ,particularpalphabet type in theselected group from which printing is to beeflected is selected by the 0, X and R zone holes and in the absence thereof the transmission of an N:impulse to print from the numeral type.
  • thetime in the machine cycle that actual printing occurs is fixed according to zones.
  • the sens.- ing of a 0 zone'hole will cause printing at 300 in the cycle; a hole at X will cause printing at 315 and a hole at ',R at 330 andin the absencethereof a-machine impulse at the N time, transmittedby circuits shown in Patent No.
  • 2,438,071 willeiiectprintingat 345 from the numeral type of the selected group.
  • Each of these pulses consists of a second impulse transmitted to the magnet 10 and by mechanism which is substantially ,the same as in the U.
  • SuPatent No. 2,438,071the print clutch is engaged at a-dilferential time to rock the printing wheel 45 to print from the selected type. For this reason this mechanism will only be generallydescribed herein.
  • shaft, 29 shown in the timing diagram is-slowed down between300345 by mechanism shown'inPatent No. 2,438,071 which is at the times that'the cam projection 43 engages extension 47 so that during such slowed-down rotation of the print wheel'45 printing may be effected from theselected type in accordance with thepresence of 0, Xfand R holes or in the absence thereof the N machine impulse.
  • the type group selecting clutch will be engaged at about 105 much earlier in the cycle than if the 8 hole alone was present in the card column. This earlier engagement of the type group selecting clutch causes the rotation of the printing wheel 45 to the extent of twelve group of type to present four different symbols successively to the printing line. After the selection and printing of the desired type which is determined by the 0, X, R hole or the N impulse in the manner previously described, the printing wheel is rotated complementally back to its normal position shown in Fig. lb.
  • cam edge demarcating notch 105 will engage the follower roller 71 to rock the follower arm 72 back to normal position where it will be held in this position by the normal position of stop member 81.
  • Previously cam edge 17b demarcating the 4 notch 17a of restoring cam 17 will relatch link 16, rock clutch release arm 59, 60, 61 to normal to permit the stop arm 82 to assume its normal position as a result of the action of a restoring spring 108.
  • Clutch release member 59, 60, 61 now assumes its normal position and hook 57 will be in position to engage the clutch pawl 55 to effect the disengagement of the delay clutch, thereby bringing all of the parts thereof to the normal position shown in Fig. la.
  • the delay clutch Upon occurrence of the combinational holes 8-3 the delay clutch will be engaged at the 8 time as previously explained but at the time the second 3 impulse is directed to the magnet 10 a second dwell 109 of cam disk 52 will be registered with the follower roller 71 so that upon the second rocking of the triple arm member 59, 60, 61 stop member 82 will be rocked to unlatch the follower arm 72 which enters the notch 109. In the manner explained for the 8-4 combinational holes this will cause the en- 1 8 gagement of the type group selecting clutch, thereby initiating rotation of the printing wheel at 120 to cause a lesser rotation of the printing wheel than for the 84 combination and to the extent of eleven groups of type. This extent of rotation of the printing wheel 45 will select a group of four punctuation and symbol type. The presence of the 0, X or R zone holes in the card column or an N impulse will determine which of the four type will be printed from.
  • Notch 17b designated 3 is wider than the other notches 17b, as is best seen in Fig. 3.
  • the restoring cam edge 17]; of notch 17a designated 3 will be effective to relatch link 16 to move foot away from the extension 111.
  • impression effecting means for taking an imprint from the type on said printing wheel
  • means for analyzing said records a clutch adapted upon its engagement to rotate said printing wheel, means for releasing said clutch for engagement, a supplemental clutch for controlling said clutch releasing means, a cam disk rotated by said supplemental clutch, a print control magnet for controlling said impression effecting means and said supplemental clutch, means under control of said analyzing means for transmitting electrical impulses to energize said print control magnet when said analyzing means analyzes said one hole, said other hole, and holes 0, X, R, means under control of said print control magnet when energized upon the analysis of said one hole to cause the engagement of said supplemental clutch and the initiation of the rotation of said cam disk, means comprising a cam portion of said disk to actuate said
  • a rotatable printing wheel carrying groupsofztype, aplurality of which groups are selected by single holes,,and another group of type isselected by one of saidholes and another-hole, means for analyzing said records, a :clutch adapted .upon its engagement torotate saidprinting wheel, meansfor releasing said clutch forengagemenna supplemental clutch for controlling said :clutch releasing means, a camdisk rotated by said supplemental clutch, .a print control magnet, 'means under control of said analyzing means for energizing said'print control magnet 21 first time when one of said single holes is analyzed, and a second time whensaid other hole is :analyzed, -means under control of saidprint:controlmagnet when energized a firsttimeto cause the engagement of said'supplemental clutch and initiation ofithe rotation ofsaid cam disk, a first cam portion carried by said cam disk for actuating the
  • a rotatable printing wheel carrying groups of type a plurality of which groups are selected by single holes, and a plurality of other groups of type are selected by one of said holes and either of two other holes
  • means for analyzing said records a clutch adapted upon its engagement to rotate said printing wheel, means for releasing said clutch for engagement, a supplemental clutch for controlling said clutch releasing means, a cam disk rotated by said supplemental clutch, a print control magnet, means under control of said analyzing means for energizing said print control magnet a first time when one of said single holes is analyzed, and a second time when either of said other holes is analyzed, means under control of said print control magnet when energized a first time to cause the engagement of said supplemental clutch and initiation of the rotation of said cam disk, a first cam portion carried by said cam disk for actuating the clutch releasing means to cause engagement of said first named clutch and the rotation of the.
  • a record controlled machine a printing wheel, having one group of type selected by a first hole, and another of a plurality of groups selected by either of two other holes with the first hole, a type group selectingclutch for initiating rotation of said printing wheel to select groups of type, a rotatable cam disk having three cam portions each adapted to cause engagement of said type groups selecting clutch at difierent times as said cam disk is rotated and one of saidcani portions being effective after the other two cam portions are effective, record analyzing means, means controlled by 'said analyzing means for initiating the rotation of said cam disk upon analysis of the first hole in the record to cause said one of the three cam portions to be effective to engage said type group selecting clutch to select said one group of type, means to prevent either of the two other cam portions from being effective before said one cam portion is efiective, and further means controlled by said record analyzing means upon analysis of either of said two other holes to disable said preventing means and to cause either of the other two cam portions in accordance with which one of the other two holes is
  • a type group selecting clutch for initiating rotation ofsaid printing wheel to select groups of type
  • a rotatable cam disk having three cam portions each adapted to cause engagement of said type group selecting clutch at different times as said cam disk is rotated and one of said cam portions being effective after the other two cam portions are effective
  • record analyzing means means controlled by said analyzing means for initiating the rotation of said cam disk upon analysis of the 8 hole in the record to cause one of the three cam portions to be effective to engage said type group selecting clutch to select said one group of type, means to prevent either of the two other cam portions from being efiective before said first one cam portion is effective, further means controlled by said record analyzing means upon analysis of either a 3 or 4 hole in the record to disable said preventing means and to cause either of the other two cam portions in accordance with

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US505866A 1955-05-04 1955-05-04 Type group and type selecting means for wheel printers Expired - Lifetime US2781722A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL206791D NL206791A (xx) 1955-05-04
BE547521D BE547521A (xx) 1955-05-04
US505866A US2781722A (en) 1955-05-04 1955-05-04 Type group and type selecting means for wheel printers
CH338632D CH338632A (fr) 1955-05-04 1956-05-03 Mécanisme d'impression

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Application Number Priority Date Filing Date Title
US505866A US2781722A (en) 1955-05-04 1955-05-04 Type group and type selecting means for wheel printers

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US2781722A true US2781722A (en) 1957-02-19

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US505866A Expired - Lifetime US2781722A (en) 1955-05-04 1955-05-04 Type group and type selecting means for wheel printers

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US (1) US2781722A (xx)
BE (1) BE547521A (xx)
CH (1) CH338632A (xx)
NL (1) NL206791A (xx)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157035A (en) * 1936-09-05 1939-05-02 Ibm Printing mechanism
US2199561A (en) * 1938-03-05 1940-05-07 Ibm Printing mechanism
US2386422A (en) * 1943-02-19 1945-10-09 Ibm Alphabetic printing mechanism
US2438071A (en) * 1944-12-23 1948-03-16 Ibm Perforated card controlled alphabet and numeral printer
US2602394A (en) * 1948-10-07 1952-07-08 Ibm Alphabet and numeral repeat printing mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157035A (en) * 1936-09-05 1939-05-02 Ibm Printing mechanism
US2199561A (en) * 1938-03-05 1940-05-07 Ibm Printing mechanism
US2386422A (en) * 1943-02-19 1945-10-09 Ibm Alphabetic printing mechanism
US2438071A (en) * 1944-12-23 1948-03-16 Ibm Perforated card controlled alphabet and numeral printer
US2602394A (en) * 1948-10-07 1952-07-08 Ibm Alphabet and numeral repeat printing mechanism

Also Published As

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NL206791A (xx)
BE547521A (xx)
CH338632A (fr) 1959-05-31

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