Communications: electrical – Continuously variable indicating – With particular transmitter
Patent
1985-02-04
1987-12-08
Caldwell, Sr., John W.
Communications: electrical
Continuously variable indicating
With particular transmitter
324 60C, 324 61R, 324 61P, G01R 2726
Patent
active
047121076
ABSTRACT:
A thin conducting probe is held parallel to and at a close distance from a conducting plate which depicts a given single-valued elementary function f(x). The electrical capacitance formed between the probe and the plate at a point within the interval specifying the validity of the function is made proportional to the value of the function f(x) at that point. As a linear capacitive displacement transducer, a rectangular inclining plate is moved in front of a fixed probe. The capacitance between the probe and the plate is measured by a bridge and a corresponding reading displayed. The displayed reading is directly related to the distance covered by the plate.
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patent: 4410852 (1983-10-01), Guretzky
patent: 4434391 (1984-02-01), Swartz et al.
patent: 4476540 (1984-10-01), Corral
Caldwell Sr. John W.
Oberley Alvin
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