Patent GB-693154-A (GB)
Title: Tape perforating machines for toll ticketing telephone systems
IPC: H04M15/38
Filed: 1951-09-21
Abstract: 693,154. Automatic exchange systems. AUTOMATIC ELECTRIC LABORATORIES, Inc. Sept. 21, 1951 [Jan. 22, 1951], No. 22184/51. Class 40 (iv). Metering information stored by a toll ticket repeater 2300 is transferred to a tabulator 2800 at the release of a connection, the tabulator then controlling perforating mechanism to record the information. The information includes calling and called numbers, duration of call, class of service, rate of charge, date, and time of release of call and, so far as the exchange record tape is concerned, the identity of the director, toll ticket repeater and tabulator used in the call. In the manner described in Specification 692,999, after selection of an idle tabulator by a tabulator allotter 2801, this information is transferred in code form over the wipers 2894-2897 of a storage register switch 2890 to the code storage register relays, after which the repeater 2300 is dismissed. Operation of hold relay R2920 energizes motor start relays R520 in the ticket tape perforator 2968, Fig. 5, and record tape perforator (not shown), the operation of the two perforations being similar except where stated. The hold relay also energizes magnets 116W-Z, the magnets withdrawing punch-controlling bars 134W-Z so that operation of pulse relays R2960, R510 and punch magnet 138 operates only punch 147TL to make a central feed hole in the ticket strip 150, this " seize " hole being also shown in Fig. 3. R2960 releases slowly to restore R510 and magnet 138. R2960 also operates RM2971 to advance the wipers 2974-7 of the record control switch 2970 to the first position, at which this switch controls relays R3195W-Z. Ground is connected to the first terminal of all the banks of 2970 so that all relays R3195W-Z operate and at the next operation of the pulse relays and magnet 138, circuit to the punch controlling magnets 116W-Z is broken and a full set of " start " perforations is made. In subsequent positions of the switch 2970, two or three of relays R3195W-Z are energized and one or two perforations are made according to the code shown in Fig. 3. For information which is to be recorded in the record tape only, skip relay R2940 is operated by means described in Specification 692,999 to cut-out R510 and magnet 138 in the ticket perforator. When the record is completed, hold relay R2920 falls back to restore the apparatus to normal. Paper feed. Each release of magnet 138 steps on a feed roll 157, feed pins on which engage the centre feed holes in the tape, a motor 171 driving a take-up roll 174 through a slipping belt. Tape alarm relay R460 is normally energized by both left and right-hand windings when both the ticket and record tape perforations are functioning normally. When the supply of tape is nearly exhausted or if the tape breaks, lever 154 or 153 reverses contacts 513, 514 or 515, 516 to light the lamp L180 in the appropriate perforator and break the circuit to the appropriate winding of R460, which then falls back to mark the tabulator busy to the allotter 2801, lights the perforator identifying lamp L464 and operates alarm relay R2910, which lights lamp 2913 and energizes audible alarm 2914. Operation of tapeloading key 112TL withdraws the punch controlling bars and operates pulse relay R510 to cause peforation of the feed hole and feeding of the tape. Faults. A fault in the tabulator operates R2850 to energize the same alarm circuit. The attendant may busy the tabulator by operating key K465.