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专利名称：High speed printing devices发明人：DIRKS GERHARD申请号：US60604756申请日：19560824公开号：US29286A公开日：19600315
摘要：854,309. Typewriters &c. DIRKS, G. Nov. 23, 1956 [Aug. 25, 1955], No. 24420/55.Class 100(4) A multi-column printing apparatus comprises a type assembly having a set oftype faces for each column arranged to form rows of similar characters constantlyrotated to bring the type faces of each set successively past the printing position andstorage device rotated at a speed of the type assembly multiplied by the number ofcolumns and the stored signals of which are read out column by column once for eachrow of type passing the printing position. The read out signals in conjunction with timebase signals being arranged to provide a signal in each column in which the character forthe row then passing the printing position is to be recorded to effect printing thereof. Inthe embodiment of Figs. 1, 2 a cylindrical type assembly 3 having identical circumferentialcolumns of characters 51-N is constantly rotated by a motor 11 which also rotates amagnetizable signal storage member 13. Impression is effected by momentum on asheet 30 by a ribbon 29 on actuation of impression members 23 by an operating roller 4after the appropriate members 23 have been released from spring armatures 21 byoperation of appropriate magnets 20. Time base signals for the magnets 20 of eachcolumn are arranged circumferentially around the member 13 and are sensedsequentially for each column by a head 14 while the data to be recorded is similarly
arranged circumferentially for sensing by a head 15. The signals from the head 14 are fedthrough an amplifier to a counting tube which sends timed pulses to a controlled
amplifier which also receives signals from the head 15. The arrangement is such that whenthe signals from the heads 14, 15 coincide a tube is fired which operates a magnet 20 towhich it is connected by a distributor rotating synchronously with the member 13. Foreach row of charcacters reaching the printing position a complete cycle of sensing of thedata of the member 13 is effected, to provide signals to the magnets 20 to release themembers 23 of those columns in which the character of the row is to be recorded.Immediately at the end of the cycle a rib 61-N on the roller 4 causes the releasedmembers 23 to effect impression. After each cycle an addition signal is fed to thecounting tube by the momentary closing of contacts 34 so that during the next cycle thecounting tube will produce pulses at the time signals corresponding to the nextcharacter row are being read by the head 15. In modified printing mechanism Fig. 12 thetype faces for each column are mounted on separate wheels 108 secured to separateholders 109 connected by springs 110 to arms 111 on a shaft 112. Springs 119 urge theholders 109 clockwise so that gears 113, 114 fully engage and the type faces can berotated together from a shaft 118. Upon counter-clockwise movements of the arms 111a stop 121 is engaged and the type face strikes under momentum without completelydisengaging the gears 113, 114. A spring blade 122 acts as a brake to the type carrier andto align it for impression it may be provided with a shaped edge to enter between teethon the gear 113. In embodiments such as this the column magnets 127 are energized inrapid succession and to allow for the successive printing of the characters each rowextends slightly helically on the type assembly. A modified impression mechanism Fig. 29comprises a member 311 mounted on a spring blade 303 normally held by a latch 305out of contact with a toothed wheel 300 rotating in synchronizm with a type assembly297. When a solenoid 308 is operated similarly to the solenoids 20 to unlatch the blade303 a pawl 302 is engaged by the wheel 300 and as it jumps off a tooth thereofimpression results under momentum, the blade becoming relatched. Various modified
control circuits are described for use with either embodiment when characters other thanthe digits of Fig. 1 are required. When additional characters are used they are arranged ingroups on the type carrier and selection of group by a timed signal is followed byanother timed signal to select a character from that group. In place of magnetizablestorage 13 other erasible storages such as a matrix of magnetic cores, flip-flop chains, aplurality of multi-stage tubes, or sets of capacitors may be used. The provisionalspecification describes and illustrates diagrammatically other basic ways of carrying outthe mechanical printing and of circuits for the control thereof by a reading of storeddata. It further states that the printing apparatus may operate from signals derived frompunched cards or tapes. Specifications 786,021 and 786,041 are referred to.
申请人：GERHARD DIRKS
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