Patent GB-384805-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04M15/38
Filed: 1931-12-15
Abstract: 384,805. Exchange systems. GENERAL ELECTRIC CO., Ltd., Magnet. House, Kingsway, London, and PUCKETTE, C. C., of General Electric Co., Stoke, Coventry. Dec. 15, 1931, No. 34717. [Class 40 (iv).] Meter readings are transferred to a strip or card with the help of a register sender which controls bi-directional distributers PS, F to select a predetermined meter or all the meters (which may be at another exchange) in turn and mav at the same time control number wheels in the recording arrangement. The selected meter magnet interacts with a magnet driving further number wheels in the recorder until the meter has been stepped on or back to zero and the record and the meter number are then printed. The recording tape may be previously printed with subscribers' names or numbers, the line number wheels in the recorder being omitted. Distributing arrangements. Start key SK energizes relays A, HD, B and starts the interrupters. SG then pulls up and the sending switch S acting with start and stop relays SA, SZ and sequence switch G sends the number on the registers MH .. UH (in the first place 1111) to the line number wheels MR .. UR of the printer and to the relay A which repeats it to the magnets V, R, FV, FR of the distributers PS, F. The sequence, as regards the distributer magnets is looked after by relays E, EA. At the end of the 1st digit, the relapse of dialling. relay C energizes E to connect up the rotary magnet. At the beginning of the next digit EA is energized and at the end,E is released and energizes the switching relay H. The 3rd digit re-energizes E and releases EA and the 4th energizes EA and releases E to energize RC. The stop relay SZ this time-energizes FD which locks up and energizes ST to initiate the transferring action and stop further sending. When the record has been printed, ST is released and since FD is energized the sender sends a single impulse independently of the condition of the registers and ST is again energized to initiate another transfer. The sequence switch remains in position H but each operation of the stop relay gives an impulse to the magnet UH of the units register so that when the last meter on the level. is' connected up, UE is: energized to release FD and to give an impulse to the magnets DH, G of the tens register and sequence switch and to the magnet UH of the units register which thus moves to normal. On the relapse of ST when this record has been printed G is stepped round to normal and A is released followed by B, EA, RC, H: FS is energized in series with the release magnet FZ of switch F and when this switch is released falls back and energizes the. release magnet Z of switch PS. G on reaching home unlocks UE which initiates the transmission of the next number viz. 1121. The tens register on its last terminals energizes TE which is' controlled similarly to UE and steps on the hundreds register. Similarly HE steps on the thousands register which on its last terminals lights a lamp and energizes RF to stop further sending. Unequipped thousands are skipped by self-interruption, RF being energized to hold up sending while the register is in motion. When it is desired to transfer the record of a single meter, SRK is operated and the registers are set by digit keys us1 .. ms1 prior to the operation of the start key. Transferring meter record. On the relapse of the stop 'relay SZ after the energization of ST, the magnet NR of the recorder pulls up and energizes the reverse drive magnet T of the selected meter in series with relay M. T energizes MO (but not IF) to energize MR which locks and releases NR. The relapse of NR is followed by that of T, M, MO whereupon MR falls and NR is energized again. This interaction continues until, when the meter reaches normal, the marginal relay IF is energized over the springs tn1. IF releases NR and energizes the printing magnet PM which unlocks ST to operate the release magnets RM, ZM of the number wheels. If an unequipped position is engaged or one on which the meter reading isalready zero, IF pulls up at once and NR is not energized. Faults. A dashpot relay controlled by MR, SZ may be provided to give an alarm if the operation of these relays 10 is held up. Construction of meter. The meter shown in detail has separate magnets, the armatures of which act directly on the forward and reverse pawls. Modifications are referred to in which the. magnets act through differential gearing and in which a single magnet is provided for both directions. Off-normal springs are controlled by a pivoted member which finds notches in all the number wheels when the meter reads zero.