Condenser plate assembly

Details Condenser plate assembly Condenser plate assembly

1976-11-29

1978-04-04

Caldwell, Sr., John W.

Communications: electrical

Systems

Call station

73304C, 361284, 361306, G08B 2100

Patent

active

040830381

ABSTRACT:
A sensor and alarm device for sensing the level of a liquid in a non-conductive container, the device including a condenser plate assembly to be secured to the container for capacitive coupling to its liquid contents and further including an electronic capacitive bridge circuit connectable to said condenser plate assembly and operative to actuate an alarm circuit when the sensed level is reached by the liquid, the condenser plate assembly comprising a flexible web having adhesive on one side and having electrically conductive flexible condenser plates fixed to the other side of said web, said web and said condenser plates being folded along plural transverse lines so that one portion of the web and the plates overlap with another adjacent portion thereof to form a connector tab, and the device including a housing for containing said capacitive bridge circuit, the housing supporting multiple electrical contacts operative to mate with and grip said tab and secure the housing thereon, and the contacts providing low mutual capacity coupling between the plates and the bridge circuit.

REFERENCES:
patent: 3102767 (1963-09-01), Schneck
patent: 3226473 (1965-12-01), Dahlgren
patent: 3939360 (1976-02-01), Jackson

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