Swimming pool alarm system and method with adjustable sensitivit

Details Swimming pool alarm system and method with adjustable sensitivit Swimming pool alarm system and method with adjustable sensitivit

1974-10-21

1977-04-12

Swann, III, Glen R.

Communications: electrical

Systems

Call station

200 612, 200 84R, 200DIG8, 340244B, 340279, G08B 2100

Patent

active

040178420

ABSTRACT:
A swimming pool alarm system which is responsive to the height of waves resulting from unauthorized entry, and which includes provision for changing its sensitivity. An alarm circuit is provided with a switch having a plurality of stationary contacts spaces apart as a function of wave height, and another contact movable by a float positioned in the water. A switch is provided to select the stationary contact which corresponds to a preselected wave height of interest.

REFERENCES:
patent: 354508 (1886-12-01), Fraleigh
patent: 996170 (1911-06-01), Vannatter
patent: 1081843 (1913-12-01), Larson
patent: 1307086 (1919-06-01), Dijkstra
patent: 2474154 (1949-06-01), McCauley
patent: 2774058 (1956-12-01), Raichel
patent: 3058101 (1962-10-01), Malvini
patent: 3155952 (1964-11-01), Boehm et al.
patent: 3482237 (1969-12-01), Hamburg et al.

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