Conveying data signals between relatively rotatable units

Details Conveying data signals between relatively rotatable units Conveying data signals between relatively rotatable units

1978-07-24

1980-05-06

Caldwell, Sr., John W.

Communications: electrical

Digital comparator systems

340201R, 340661, G08B 2900, G08C 900, G08B 2100

Patent

active

042019796

ABSTRACT:
When high-speed digital signals are transmitted through a slip ring connection between relatively rotatable systems, the slip ring connection is prone to brief interruptions of contact which introduce extra "ones" or "zeros" into the transmitted digital wave form. In this invention, the binary input signal is split into two paths, one-representing signals causing a current to pass through a first slip ring and zero-representing signals causing a current to pass through a second slip ring. On the output side of the slip rings, the passage of current through one slip ring or the other is used to reproduce the original binary signal; additionally, the combined current flow through both slip rings is used to generate an extra signal which, in the absence of current in either slip ring, indicates a fault.

REFERENCES:
patent: 3614774 (1971-10-01), Clements
patent: 3683368 (1972-08-01), Ebner
patent: 3961317 (1976-06-01), Debrem et al.

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