Pool alarm

Details Pool alarm Pool alarm

1991-02-08

1992-06-09

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340573, 367136, G08B 1300

Patent

active

051211041

ABSTRACT:
A swimming pool alarm responsive to wave motion that will produce a signal when two waves exceeding a threshold level of amplitude are sensed within a preset duration of time. A transducer senses air or water pressure changes and produces electrical signals corresponding to the changes. A comparator system, connected to the transducer, receives the transducer signals and, if the signals exceed a preset threshold level, transmits a signal to the discriminator system. The discriminator times the signals received from the comparator and when two signals are received within a specified period of time, a third signal is generated. A warning device such as an alarm is connected to the discriminator and will be activated by the third signal.

REFERENCES:
patent: 3953843 (1976-04-01), Codina
patent: 3969712 (1976-07-01), Butman et al.
patent: 4121200 (1978-10-01), Colmenero
patent: 4196423 (1980-04-01), Carver
patent: 4571579 (1986-02-01), Woolley
patent: 4604610 (1986-08-01), Baker
patent: 4853691 (1989-08-01), Kolbatz
patent: 5023593 (1991-06-01), Brox

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