GB692096A - Improvements in or relating to printing machines - Google Patents

Improvements in or relating to printing machines

Info

Publication number
GB692096A
GB692096A GB5445/50A GB544550A GB692096A GB 692096 A GB692096 A GB 692096A GB 5445/50 A GB5445/50 A GB 5445/50A GB 544550 A GB544550 A GB 544550A GB 692096 A GB692096 A GB 692096A
Authority
GB
United Kingdom
Prior art keywords
printing
relay
letter
operated
thyratrons
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
Application number
GB5445/50A
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.)
Unisys Corp
Original Assignee
Burroughs Adding Machine Co
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 Burroughs Adding Machine Co filed Critical Burroughs Adding Machine Co
Publication of GB692096A publication Critical patent/GB692096A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235Print head assemblies
    • B41J2/245Print head assemblies line printer type

Landscapes

  • Credit Cards Or The Like (AREA)
  • Impact Printers (AREA)
  • Facsimile Heads (AREA)
  • Printing Methods (AREA)

Abstract

692,096. Typewriters &c. BURROUGHS ADDING MACHINE CO. March 3, 1950 [March 8, 1949], No. 5445/50. Class 100(iv) An electromagnetically controlled printing mechanism comprises a series of printing elements, a series of print-control elements (rods 41, Fig. 4) for moving the printing elements to printing position, means e.g. bail 53 for retracting the rods 41, an armature 47 for each rod movable by its rod to a location where it may be retained by an electromagnet 38, and means for selectively energizing or not energizing the magnets 38 so that the appropriate rods 41 may be moved to effect printing by the elements. The printing elements comprise fine wires 30 which are arranged in groups of thirty-five Fig. 12 (not shown) for each print head 29, as described in Specification 674,343. The machine which is controlled by record cards comprises a number of printing heads 29 arranged in groups of six Fig. 1, to form two characters in each of three lines, and positioned in an end portion 20 of a block 19, Fig. 2, constituting the front of a narrow panel 18. A sensing of each record card effects the setting of all mechanisms to effect printing simultaneously in the three lines. The wires 30 from each group of six are guided through tubes into six control units 35 on one panel 18, and a number of similar panels 18, Fig. 1, are mounted together between side plates 15 and 16 connected by tie-rods 17. Each unit 35 is divided into eighteen sections, Fig. 2, each having two control electromagnets 38 excepting the extreme righthand section which has one magnet. The magnets are mounted on inclined supporting bars 36 so that the print control elements or rods 41, Fig. 4, forming extensions of the wires 30 are conveniently arranged to coact with the armatures 47 of magnets 38. Each rod 41 is urged to move its wire 30 into print position by a spring 44 but during a cyclic movement of a bail 53 into dotted line position the rods 41 are moved into non-print position and a collar 51 on each rod engages behind a shoulder 52 on the armature 47 of its associated electromagnet 38 and thus closes the air-gap A. At this point in time the record card is sensed and the electromagnets 38 are selectively energized and maintain the airgaps closed so that the cyclic movement of the bail 53 will allow the rods 41 of such operated magnets to move under the action of springs 44 into print position. Those magnets not operated will release their armatures 47 and shoulders 49 thereon move in front of a second collar 50 on each of the rods 41 which are thus held in non- print position. In an alternative arrangement, Fig. 6a, (not shown) the reverse operation is effected wherein those electromagnets whose printing elements are to be prevented from advancing to print position are energized. The bail 53 in both cases is slidable in a block 24 in each panel 18 and cyclically operated by bell crank levers 55 engaged by arms 58, one pair for each bail 53, and which are mounted on common rock shafts 56, 57 journaled in the side plates, 15, 16 and oscillated by cam mechanisms 61-68 from a powered shaft 60. The thirty-five electromagnets 38 for each printing head are selectively operated in various combinations in accordance with a code as decribed in Specification 674,343, in which perforations in rows 12, 11 and 0 of associated record cards select groups of letters, and perforations in rows 1-9 select letters within each group, or figures if not preceded by a group code. If, e.g. a letter A is to be printed, perforations occur in rows 12 and 1 of the record card. Sensing of perforation 12 by a column sensing brush 74 puts an increased bias on to the centre point of one half of a bridge network between grid and negative potential of a series of thyratrons 76-78, 86-94 corresponding to the rows 12-0, 1-9. If, at the same moment of sensing a perforation by the brush 74, a distributer 75 rotating in step with the sensing of the rows of perforations in the record card puts an increased potential on to one of the thyratrons 76-78, then that thyratron, say 76, receiving the increase potential on both halves of the bridge network now fires and a circuit (e.g. in the case of letter A) is extended from positive, wire 97, cam 61, relay 79, thyratron 76, relay 83 to zero volts. Relay 79 is thus operated and closes contacts in circuits associated with electromagnets 38 required to form letters within group A-I. Sensing of the second perforation (row 1) by brush 74 causes, by a similar arrangement, one of the thyratrons 86-94 to fire, e.g. thyratron 86 in the case of letter A, and complete a circuit from zero volts, relay 110, thyratron 86, contacts A (now closed), wires 95, electromagnets 38 required to make up the letter A, wire 70, print cam C4, wire 97, to positive battery. The thyratrons are stopped by holding cams Cl and C2 which remove the positive potential from the anodes. In order to prevent the printing of a numeral on receiving the second letter code the operation of any one of the thyratrons 76-78 causes a common cathode relay 83 to operate opening contacts 84 in a circuit to a relay 82 so that when the second code of a letter is received the numeral magnets 38 are not operated. When numerals are to be printed contacts 84 remain closed, because none of the thyratrons 76-78 are operated, and the relay 82 is thus able to be operated by a numeral cam C3. Relay 82 closes contacts 1-9, Fig. 9, extending connections to the various conductors 71 connected to the printing magnets 38. The subsequent numeral code operating its particular thyratron causes the operation of the particular magnets 38 through the connection set up. The same type elements are used to form both the letter O and zero, but the selection thereof is arranged differently. The letter is formed as a result of perforations in rows 11 and 6 and zero from row 0 only, the former being arranged by firing thyratrons 77 and 91 in a similar manner to that described above in connection with the letter A. When a code is in row 0 only, zoning thyratron 78 is fired, operating relay 81; this closes contacts S-Z but this has no effect since no second perforation is present to fire one of the numeral thyratrons 86-94. Relay 81 however has an additional contact 111 which completes the circuits from the 0 electromagnets, through wire 112, contact 111, resting contacts 113 of relay 110 (not operated), link 115 and through a zero print cam C5: Specification 692,137 relating to the suppression of the printing of zeros is referred to.
GB5445/50A 1949-03-08 1950-03-03 Improvements in or relating to printing machines Expired GB692096A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80136A US2683410A (en) 1949-03-08 1949-03-08 Selective wire printing machine

Publications (1)

Publication Number Publication Date
GB692096A true GB692096A (en) 1953-05-27

Family

ID=22155480

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5445/50A Expired GB692096A (en) 1949-03-08 1950-03-03 Improvements in or relating to printing machines
GB10008/52A Expired GB692137A (en) 1949-03-08 1950-03-03 Improvements in or relating to printing machines

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB10008/52A Expired GB692137A (en) 1949-03-08 1950-03-03 Improvements in or relating to printing machines

Country Status (4)

Country Link
US (1) US2683410A (en)
DE (1) DE1071719B (en)
FR (1) FR1066884A (en)
GB (2) GB692096A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785627A (en) * 1953-10-07 1957-03-19 Ibm Wire printer
NL200433A (en) * 1954-10-13
NL202952A (en) * 1954-12-30
IT565293A (en) * 1954-12-30
NL202955A (en) * 1954-12-30
IT546188A (en) * 1954-12-31
US2917996A (en) * 1955-04-25 1959-12-22 Burroughs Corp Thermal printer
US2873666A (en) * 1955-06-16 1959-02-17 Sperry Rand Corp High speed printer
DE1075878B (en) * 1957-10-24 1960-02-18 Siemens Ag Contact matrix for punch card filling devices
US3584575A (en) * 1968-11-12 1971-06-15 Johann Distl Mosaic printing head and device for producing the same
US3715020A (en) * 1970-09-21 1973-02-06 Teletype Corp Wire recording and mechanism therefor
DE2716617C2 (en) * 1977-04-15 1982-11-04 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Dot matrix print head

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1028037A (en) * 1911-04-26 1912-05-28 Tideman M Lilleberg Character-forming machine.
US1124150A (en) * 1912-03-26 1915-01-05 Tideman M Lilleberg Character-forming machine.
DE523698C (en) * 1927-10-28 1933-08-21 Georg Krauss Typewriter with needles that can be moved to form the letters
FR758715A (en) * 1932-09-24 1934-01-22
US2053243A (en) * 1933-12-08 1936-09-01 Ibm Tabulating machine
US2111122A (en) * 1936-12-22 1938-03-15 Ibm Printing mechanism
US2129065A (en) * 1937-07-06 1938-09-06 Joseph N Loop Apparatus for printing characters
US2248522A (en) * 1939-04-18 1941-07-08 Ivan W Conrad Automatic telegraphy
US2291970A (en) * 1939-09-27 1942-08-04 Ibm Printing mechanism
US2338173A (en) * 1941-10-25 1944-01-04 Ibm Printing mechanism
US2353083A (en) * 1942-08-27 1944-07-04 Ibm Recording machine
US2486985A (en) * 1945-10-10 1949-11-01 Ruderfer Martin Electrical printing type
US2524127A (en) * 1946-11-06 1950-10-03 Ibm Printing character forming wires

Also Published As

Publication number Publication date
US2683410A (en) 1954-07-13
FR1066884A (en) 1954-06-10
GB692137A (en) 1953-05-27
DE1071719B (en) 1959-12-24

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