Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1974-05-13
1976-10-12
Safourek, Benedict V.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340310A, H04B 100
Patent
active
039861210
ABSTRACT:
A method for remote-control through a power supply system, wherein at the transmitting end the control commands are superimposed upon a power line of the power supply system in the form of angle-modulated signals and are removed at any point of the power supply system for discrimination and subsequent evaluation according to their momentary frequency or phase.
An arrangement for carrying out the aforesaid method is also disclosed wherein a transmitter which can be modulated in its frequency or phase with the information corresponding to control commands is provided at the transmitting end. The transmitter is coupled through coupling means at the transmitting end to a power line of the power supply system used for transmission. At least one receiver is connected to at least one arbitrary point of the power supply system, the receiver comprising selecting means for the signals to be received, a frequency or phase discriminator following said selecting means, and an evaluating arrangement following the discriminator.
REFERENCES:
patent: 3508243 (1970-04-01), Nyfeler et al.
patent: 3569835 (1971-03-01), Harner
patent: 3588610 (1971-06-01), Stable
patent: 3656112 (1972-04-01), Paull
patent: 3699447 (1972-10-01), Frost
patent: 3806876 (1974-04-01), Kniel et al.
patent: 3835389 (1974-09-01), Helfen
Kleeman Werner W.
Psitos Aristotelis M.
Safourek Benedict V.
Zellweger Uster Ltd.
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