Publicity type portable automatic sound transmitter - has chronological programming of transmissions using tape cassette and reader in case containing amplifying circuits and loudspeakers

摘要

The portable sound transmitter is designed to emit preset timed publicity information in public places. It uses in combination a current convertor a sound tape cassette (11) and a tape reader (7). the tape reader has an electronically regulated motor and automatic head biassing. The transmitter has also an analogue system amplifier (8) and a quartz timer (10). The transmitters case (1) incorporates a supply connection or battery and omnidirectional loudspeakers.