Patent GB-723043-A (GB)
IPC: A61M5/14
Abstract: 723,043. Typewriters &c. MAUL, M. May 29, 1952 [June 19, 1951], No. 13688/52. Class 100 (4). [Also in Group XIX] Record-controlled driving-mechanism.-Relates to a recording-machine controlled by record cards having a plurality of record decks. A common set of analysers and a common set of recorders controlled thereby are provided for all decks, and analysing and recording of all columns of a deck takes place simultaneously and of the decks one after the other. During the passage through the machine of a card, the recording for all the decks is effected. Each deck is provided with an individual set of column selectors manually pre-settable for each column, so that selected columns may be excluded from being recorded. The perforated record cards, Fig. 1, are provided with two decks, each consisting of six lines and thirty columns. Thirty type wheels are provided, one for each column, and each type wheel is set as a result of analysing the perforations in one column in one deck, printing taking place twice during the passage of the card through the machine, once above each deck, and corresponding to the perforations in that deck. In Fig. 1 certain columns have been printed, and other perforated columns have been excluded from printing by the column selectors. The cards are passed through the machine in the direction of their upper edges in Fig. 1, so that the six lines are analysed in succession. As each line is analysed, the presence of perforations causes the corresponding type-wheels to be moved round a certain number of units, except those whose columns are excluded, and the number of units moved through as the six lens are sensed is respectively 1, 2, 4, 8, 16, 16. For example, in column 5 of the upper deck, Fig. 1, the type-wheel will be moved through 0, 2, 4, 8, 0, 0 units respectively, or fourteen units, which brings the type for numeral 7 into printing position, to be printed as shown above the deck. A motor 59, Fig. 12, drives shaft 62, Figs. 10 and 12, carrying a crank 11, Figs. 5 and 10, pivoted to a lever 14 fulcrummed at 15 on movable pivot pin 18, so that the far end of the lever 14 describes an ellipse, and through links 16, 13 shaft 24 and gear 25, oscillates a pinion 27 associated with the type-wheels. The shaft 62 carries an eccentric 33 which through a link 34, rocker 31 and pawl 29 moves a ratchetwheel 12 through one unit for each revolution of the crank 11. In each position of the ratchet 12, a lever 35 actuated by the rocker 31 engages a screw 36 to lock the ratchet in the correct alignment. The ratchet 12 acts through links 17, 23 to move the pin 18, thus altering the position of the fulcrum or guide 15 for the lever 14 so as to vary the amount of oscillation of the pinion 27 during successive strokes of the crank in order that the type wheels should be moved through the correct number of units according to the line being analysed. The pinion 27 is connected to the type wheels 54 through shafts 44 carrying for each type wheel a gear 45 associated through a clutch with the type wheel. Each clutch is actuated by a lever 66 or 68 operated by an electromagnet D. The ratchet 12 is fast on a shaft 92, Figs. 10, 12 and 16, which through a reduction gear train 96, 97, 98 drives a sleeve 82. A gear segment 93 confines the drive to a part of the machine cycle, and the sleeve returns by means of a pawl 83 the type wheels to zero position, the type wheels being loose on the sleeve. The shaft 92 also carries a cam 95 which actuates a contact a, Figs. 4 and 16, and a cam 94 which acts on a lever 101 against a spring 103 to rotate a shaft 102 and retract the printing hammers 91. When the cam 94 slips off the lever 101, the spring 103 causes printing, the stroke being cushioned by a rubber pad 100. The lever 101 through links 104, 105 and a shaft 106 causes the point 86a of a yoke 86 to engage grooves in the type wheels to lock them in alignment for printing. The shaft 62 also operates a link 122, which actuates a contact i, Figs. 4 and 10, and drives a shaft 126 intermittently through link 121, pawl 123 and ratchet-wheel 124. The shaft 126 drives a cam disc 131 which actuates a deckshift contact u, Figs. 4 and 16, and also through links 133, 134, a shaft 135, a lever 136 and a slide 137 reciprocates card knives 114 which feed cards from a magazine 113 to rollers 115 driven from the shaft 126 through gears 127, 128. The type wheels are inked by a roller 88. The cards are collected in a support 116 which when full actuates a contact m to stop the machine. The cards are fed past the analysers consisting of brushes b which on analysing perforations complete an electric circuit through the equivalent magnet. A series of keys 142, one for each column of each deck, actuates contacts to (for upper deck), and tu (for lower deck), to prevent the actuation of magnets for columns not desired to be printed. When the machine is switched on and a start key st, Fig. 4, is pressed, the motor 59 is started and when the first card reaches the analysers it closes a contact k, when the key st can be released. Circuit is now completed for the magnets D through the contact m (opened when the card support 116 is full), the contact k, the contact i (closed by the link 122), the contact a (closed by the cam 95), those of the brushes b which have analysed a perforation, those of the magnets D associated with columns having a perforation in the line being analysed, those of the contacts to or tu which have not been opened by keys 142 and which are applicable to the deck now being dealt with, rectifiers r to prevent reverse currents, and the contact u, which is set by the cam disc 131 according to which deck is being analysed. Printing may alternatively be on a separate card from the record card.