Control circuitry for water level control of pools
Swimming pool water level control apparatus
Apparatus for controlling water level Patent #: 4612949
ApplicationNo. 07/053860 filed on 05/26/1987
US Classes:4/508, And water level control210/138WITH TIME CONTROL
ExaminersPrimary: Recla, Henry J.
Assistant: Donovan, Edward C.
Attorney, Agent or Firm
International ClassesG05D 9/12 (20060101)
G05D 9/00 (20060101)
E04H 4/12 (20060101)
E04H 4/00 (20060101)
AbstractA control system for automatically maintaining a predetermined water level in a swimming pool includes a multi-contact water level sensor unit mounted on an exposed sidewall of the pool. The sensor unit is vertically adjustable within a stationary mounting bracket to enable user adjustment of a selected normal water level. A single sensing contact on the sensor unit senses the presence or absence of water at the selected normal level. A monitoring circuit associated with the sensor unit interrupts operation of the control system in the event that the sensor unit is disconnected. Additional water level sensing contacts open a dump valve to preclude overflow of the pool in the event of a high water condition, and interrupt operation of recirculation pump apparatus associated with the pool in the event of a low water level.
Field of SearchAnd water level control