Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1976-11-17
1978-02-21
Trafton, David L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
358 86, G08B 2500
Patent
active
040756289
ABSTRACT:
In a community TV receiving system in which television carrier signals are sent from a common community receiving antenna through a dividing box to respective TV receivers, all connected through coaxial cables, and an alarm system incorporated therein comprising alarm signal generators each having a resistance peculiar thereto connected to the coaxial cables across the core-tube circuit thereof in the vicinity of the respective receivers, and a common alarm receiver operable in response to the peculiar resistances located at a suitable station for indicating the signal generator location without interference to the TV signals.
REFERENCES:
patent: 3105873 (1963-10-01), Winston et al.
patent: 3244809 (1966-04-01), Fuller et al.
patent: 3517120 (1970-06-01), Bunting
patent: 3932858 (1976-01-01), Smith et al.
Masuda Hajime
Takeuchi Takeshi
Tomioka Yukio
Watanabe Masakatsu
Hochiki Corporation
Jordan Frank J.
Trafton David L.
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