GB891405A - Circuit arrangement with transfluxor - Google Patents

Abstract

891,405. Trarisfluxors. STANDARD TELEPHONES & CABLES Ltd. May 29, 1959 [June 3, 1958], No. 18360/59. Class 40 (9). [Also in Group XIX] The reset input to a transfluxor is produced by switching a core of the same square loop material so as to obviate temperature effects. As shown in the stepping-register of Fig. 4, alternate shift pulses on lines P1 and P2 alternately reset transfluxors K0, K2, &c. and the intervening cores K1, K3, &c. Should one of the transfluxors K0 be set, a shift pulse resets it to a blocked. condition and output from winding a2 sets the following core K1. The next shift pulse on P2 switches K1 which over the loop W2, S1- sets the transfluxor K2. Coupling between windings e and a enable the transfluxors to be interrogated. If interrogation always accompanies shift pulses on line P1, the arrangement of Fig. 5 may be employed. If transfluxor K0 is set an A.C. signal in winding e produces an A.C. output in winding a which is rectified to set the core K1. When K1 is reset by a shift pulse on line P2 output in the loop W2, S1 sets transfluxor K2 which is interrogated to set core K3 before the next shift pulse on line P1 to set the transfluxors. A single shift pulse line in common to the transfluxors and intermediate cores may be used if delay lines are placed in the coupling loops; see Figs. 6 and 7 (not shown). Diodes on the coupling loops prevent back-coupling but are not necessary in the loop between, say, core K1 and transfluxor K2 if the setting of K1 is done sufficiently slowly not to induce a switching voltage in the loop. It is pointed out that a transfluxor may be set as the result of a number of applied pulses.