Communications: electrical – Digital comparator systems
Patent
1977-01-05
1979-04-17
Caldwell, Sr., John W.
Communications: electrical
Digital comparator systems
73351, 324 65R, 340177VA, 340195, 340203, 340206, G08C 1924
Patent
active
041503589
ABSTRACT:
A system for transmitting signals between stationary and movable portions of a machine without utilizing any direct electrical contacts. An alternating supply source for the system is provided on the stationary portion and is connected to a stationary coupling member of an inductive coupling. A movable coupling member of the inductive coupling is arranged on the movable portion of the machine. A pulse generator connected to the movable coupling member receives its alternating supply voltage through the inductive coupling and generates a pulse during each period of the supply. A temperature dependent resistor controls the pulse generating device so that the phase portion of the pulse in relation to the zero passage of the supply voltage is dependent on the sensed temperature. The pulses are fed back through the inductive coupling to a measuring device arranged on the stationary portion of the machine.
REFERENCES:
patent: 3303701 (1967-02-01), Matsuura et al.
patent: 3338100 (1967-08-01), Takami
patent: 3391576 (1968-07-01), Takami et al.
patent: 3582924 (1971-06-01), Uemura et al.
patent: 3673552 (1972-06-01), Mross et al.
patent: 3719935 (1973-03-01), Chaney
patent: 3742473 (1973-06-01), Hadden
patent: 3824857 (1974-07-01), Smith
ASEA Aktiebolag
Caldwell Sr. John W.
Groody James J.
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