Direct drive sliding contact transducer

Details Direct drive sliding contact transducer Direct drive sliding contact transducer

1975-09-02

1977-05-10

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

73398AR, 338 41, H01H 3532

Patent

active

040230007

ABSTRACT:
The invention pertains to a pressure sensing transducer employing an evacuated bellows wherein sliding electric contacts are mounted upon the bellows' movable portion. The sliding contacts traverse over a printed circuit board having conducting portions defined thereon connected to electrical resistances whereby pressure variations imposed upon the bellows position the contacts upon the conducting portions to produce an electric signal. A variety of adjusting means are utilized to adjust the position of the printed circuit board to the bellows, and the "span" of the conducting portions in the direction of contact movement is selectively varied by forming the conducting portions of a wedge shape and laterally adjusting the printed circuit board. Further, in an embodiment of the invention, zero reference points are defined on the printed circuit board when used in conjunction with a pair of laterally spaced contacts to electrically indicate the orientation of the printed circuit board to the bellows and bellows mounted contacts when initially calibrating the transducer.

REFERENCES:
patent: 3046369 (1962-07-01), Hicks
patent: 3136970 (1964-06-01), Pegram
patent: 3283283 (1966-11-01), Denner

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