Improvements in or relating to devices for the selective remote control of independent mechanisms

Abstract

Abstract 509,866. Electric control systems; valve generating circuits. SOC. ANON. FIMI. June 24, 1938, No. 18832. Convention date, July 21, 1937. Drawings to Specification. [Class 40 (i)] [Also in Group XL] In a system employing trains of impulses of modulated carrier current to effect remote control of a number of apparatus, the transmitter comprises an oscillating valve in which modulation is effected by the use of a grid resistance of sufficiently high value, a commutator allowing the selection from a number of resistances to give different modulation frequencies. 'The trains of impulses may be generated under the control of a switch in the anode circuit of the valve. At the receiver, after demodulation, the signals are filtered and each frequency affects its corresponding relay or servomotor.

Inventors

No inventors recorded.

Bibliographic Details