Easy-to-assemble capacitive probe for a high precision dimension

Details Easy-to-assemble capacitive probe for a high precision dimension Easy-to-assemble capacitive probe for a high precision dimension

1983-03-14

1986-02-04

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

G01R 2726

Patent

active

045688737

ABSTRACT:
A capacitive probe assembly is comprised of an electrode subassembly and an electric circuit subassembly which can be readily connected to and disconnected from each other, both mechanically and electrically. The electrode subassembly comprises a measuring electrode and a guard electrode concentrically mounted within a tubular, electrically conductive housing while being insulated from each other and from the housing. The measuring and guard electrodes are exposed through one of the opposite open ends of the housing. Inserted in the housing through the other open end thereof, the circuit subassembly includes a circuit board, with measuring circuit elements mounted thereon, which is supported at one end by a plug and at another end by a disclike support. The plug is engaged in sockets in the measuring and guard electrodes for both mechanical and electrical connection of the measuring circuit board to the electrodes. The disclike support is retained in position within the housing by an end cap threadedly engaged in the said other end thereof. The housing is held at ground potential via the end cap, support, and conductive regions on the circuit board.

REFERENCES:
patent: 3400331 (1968-09-01), Harris
patent: 3739264 (1973-06-01), Resh
patent: 3771051 (1973-11-01), Abbe
patent: 3805150 (1974-04-01), Abbe
patent: 3879660 (1975-04-01), Piso
patent: 4047242 (1977-09-01), Jakob
patent: 4311959 (1982-01-01), Riessland

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