Control system for an aerial device

Details Control system for an aerial device Control system for an aerial device

1975-04-15

1978-02-14

Pitts, Harold I.

Communications: electrical

Digital comparator systems

340171A, 340171PF, H04Q 900

Patent

active

040742342

ABSTRACT:
A remote control system for a derrick, having an encoder network for producing a plurality of differing electrical control signal frequencies at one location on the derrick and a discriminator network at a second location on the derrick for identifying each electrical control signal frequency produced by the encoder network. An electro-optical converter communicates with the encoder to convert electrical control signal frequencies to analogous light signal frequencies. A light tube communicating with the electro-optical converter transfers the light signal frequencies from the electro-optical converter to an optical-electro converter that communicates with the discriminator and reconverts the light signal frequencies back to their corresponding electrical control signal frequencies. The discriminator communicates with a plurality of output networks that correspond to operating members of the derrick and directs an identified control signal frequency to the output network associated with that frequency.

REFERENCES:
patent: 3002147 (1961-09-01), Wasserman
patent: 3098212 (1963-07-01), Creamer
patent: 3136385 (1964-06-01), Eitel
patent: 3498411 (1970-03-01), Worden
patent: 3506836 (1970-04-01), Rueger
patent: 3626373 (1971-12-01), Wilcox
patent: 3651765 (1972-03-01), Grundy
patent: 3710122 (1973-01-01), Burcher
patent: 3774217 (1973-11-01), Bonner

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