Resources Contact Us Home
Automatic water level monitoring system

Image Number 4 for United States Patent #4621657.

A system for maintaining a preselected water level in e.g. a swimming pool comprises a chamber (6) in communication with the pool such that the water level in the chamber corresponds to that of the pool. The chamber contains an adjustable over flow tube (15) and a vertically oriented water supply line (19) having a diaphragm valve (20) and surrounded by an annular float (29), the valve being actuated by a height adjustable overhead actuator bar (23).

  Recently Added Patents
Method, apparatus, and system for energy efficiency and energy conservation including dynamic cache sizing and cache operating voltage management for optimal power performance
Blueberry plant named `DrisBlueFour`
Method for controlling a motor
Scoring records for sorting by user-specific weights based on relative importance
Oral care implement accessory
Digital watermark embedding apparatus, digital watermark embedding method, and digital watermark detection apparatus
Systems and methods for advertising on content-screened web pages
  Randomly Featured Patents
Combined wet and dry vacuum cleaner
Integrated turbine power generation system with catalytic reactor
Branching passage assembly for endoscopic biopsy channel
Teaching aid
Apparatus and methods for sorting particles
Door activating motor control apparatus
Food product with linked star design
Polishing slurry compositions capable of providing multi-modal particle packing and methods relating thereto
Continuous casting method for metallic amorphous strips
Jewelry armoire