Liquid level sensing switch
US3934103A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1974 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Jun 3, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A liquid level sensing switch has an open ended chamber in an electrically conductive body, has an insulating bushing disposed in the open end of the body chamber and has a contact member extending through the bushing to dispose one end of the contact member in spaced relation to the body at the closed end of the body chamber. An electrically conductive magnetizable ball is disposed in the chamber for movement between a closed circuit position engaging both the body and the contact member and an open circuit position spaced from one of these components. A float is mounted on the body exteriorily of the chamber and carries a magnet so that movement of the float between two positions outside the body in response to change in liquid level is effective to move the ball between open and closed circuit positions within the body chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.