Title: Liquid level sensing switch

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Walstra, Hidde (Attleboro, MA, US)

Application Number: 475468
Filing Date: 1974-06-03
Publication_date: 1976-01-20
Assignee: Texas Instruments Incorporated (Dallas, TX)
Primary Class(es): 200/84C 340/450, 340/625
Other Classes:
US Patent Ref:

2783326	Feb, 1957	Hanson et al.	200/84.
2927176	Mar, 1960	Aul, Jr. et al.	200/84.
3103562	Sep, 1963	Dinoia	335/205.
3750124	Jul, 1973	Barnes et al.	200/84.

Other Refs: 1,115,833

May, 1968	UK

Primary Examiner: Smith, Jr., David
Assistant Examiner:
Attorney: McAndrews; James P., Haug; John A., Baumann; Russell E.