Remote control receiver

• Main Author: CURTIS LESLIE F
• Format: Patent
• Language: English
• Published: 06.02.1940
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION ANDCOMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWNENERGY USE; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSMISSION; WIRELESS COMMUNICATIONS NETWORKS

533,989. Remote control radio receivers. HAZELTINE CORPORATION. Dec. 6, 1939, No. 31628. Convention date, Dec. 31, 1938. [Class 40 (v)] [Also in Groups XXXVIII and XXXIX] A radio receiving section 11 is controlled from a section 10 by means of an oscillation generator with a time delay device operating as follows. When a switch 65 is closed to connect the power supply of the section 10, another switch 66 is simultaneously operated and sets the valve oscillator 60 is oscillating at one frequency ; and the oscillations transmitted to a relay 39 operates a switch 34 to set the section 11 in operation. After a given time, a thermal switch 68 heated by an electric heater 69 switches the oscillator off and changes the tuning of the oscillator valve 60 in readiness for the next operation, which, as shown, is the switching off operation. That is, when the switch 65 is turned back, to switch the section 10 off, the switch 66 again sets the valve 60 oscillating but this time at a different frequency, whereby the relay 39 operates to open the switch 34 to shut off the section 11. As shown, the section 11 includes an intermediate frequency amplifier 23 and associated devices for operating a loud speaker 26 ; the section 10 includes an oscillator modulator 18 and associated devices ; a separate section comprises an impedance matching device 9 for the aerial circuit 12, 13 ; and all the sections are interconnected by lines 14 and plugs 15.