Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-04-26
1999-12-07
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
73319, 200 84R, 340620, 340624, G08B 2100
Patent
active
059991011
ABSTRACT:
A liquid level alarm system is activated when liquid in a container falls below a predetermined level. The system contains an alarm located outside the container. The alarm is electrically connected to a switching device. The switching device may have a push-down button located on the top, an "on-off" switch located on the side, or a sliding switch located on the side. When the switch is pushed down, the switching device activates the alarm. The container has a vertically positioned rod adjacent the switching device. There is a float slidably connected to the rod by a connecting rod and hook. The float rises and falls with the level of the liquid. On the side of the rod opposite the float there is a switch contact which makes contact with the switch when the level of the liquid falls below a predetermined level and the float is no longer supported by the liquid. The switching device may be electrically connected to a motor which, when activated, changes a valve in an inlet pipe from the opened position to the closed position.
REFERENCES:
patent: 1323882 (1919-12-01), Lorenz
patent: 3857358 (1974-12-01), Ward et al.
patent: 3894555 (1975-07-01), Payne
patent: 4227173 (1980-10-01), Clark
patent: 4627283 (1986-12-01), Nishida et al.
patent: 4827769 (1989-05-01), Riley et al.
Hofsass Jeffery A.
Huff Richard L
Tweel , Jr. John
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