Water level alarm apparatus

Details Water level alarm apparatus Water level alarm apparatus

1991-03-12

1992-09-29

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340604, 200 6104, G08B 2100

Patent

active

051516853

ABSTRACT:
An alarm mounted within a housing, such as a drain housing of an air conditioner, including an elongate, planar sponge sheet, the sponge sheet mounted to a collar that is orthogonally affixed to a lower terminal end of a support tube, a switch includes a first component mounted on the sheet, and a second component fixedly secured to the tube space above the collar, wherein the sponge sheet is defined by a first thickness in a dehydrated configuration and wherein the sheet expands to a second thickness in a moistened configuration to effect electrical communication between the first and second member of the switch to complete an electrical circuit and effect actuation of an audible and/or visual signal member.

REFERENCES:
patent: 4246575 (1981-01-01), Purtell et al.
patent: 4973947 (1990-11-01), Tax

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