Level sensor

Electricity: circuit makers and breakers – Liquid contact – Plural switches

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

200215, 200 6147, 200220, 33366, H01H 2900

Patent

active

051432080

ABSTRACT:
An apparatus for sensing the horizontal level of a table or other surface and returning that table or other surface back to level. The apparatus includes a housing within which first and second mercury switches are positioned relative to each other in a manner which permits the electrical contacts of each switch to be positioned on opposite ends of the housing. Two spring clips are provided for securing the first and second mercury switches within the housing. A pivot rod is provided to permit each mercury switch and spring clip assembly to pivot about a transverse axis within the housing. An adjusting screw and stablizing spring pair are positioned adjacent to each of the two mercury switch and spring clip assemblies. The adjusting screws may be turned to set the position of the mercury switch about the axis of the pivot rod relative to the horizontal plane in order to set a dead band wherein neither of the two mercury switches is closed. A chemical compound is used to seal the housing and prevent the switches from moving once the dead band is set. Finally, an electrical circuit which detects the activation of either of the two mercury switches is provided.

REFERENCES:
patent: 1642718 (1927-09-01), Bolling
patent: 1695260 (1928-12-01), Walker
patent: 1715948 (1929-06-01), Reinartz
patent: 1720180 (1929-07-01), Keiser
patent: 1925274 (1933-09-01), Norviel
patent: 1936324 (1933-11-01), Carson
patent: 2296053 (1942-09-01), Porter et al.
patent: 2569796 (1951-10-01), Browning
patent: 2745091 (1956-05-01), Leffler
patent: 3259202 (1966-07-01), Griffeth
patent: 3657695 (1972-04-01), Birmingham
patent: 4325190 (1982-04-01), Duerst
patent: 4678093 (1987-07-01), Allen
patent: 4743037 (1988-05-01), Hanser
patent: 4745647 (1988-05-01), Goodwin
patent: 4820888 (1989-04-01), Shields
patent: 4930787 (1990-06-01), Nobles
patent: 4942635 (1990-07-01), Hargest et al.
patent: 4954725 (1990-09-01), Webster

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Level sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Level sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Level sensor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-762774

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.