Electricity: circuit makers and breakers – Float – Float and pressure
Patent
1975-07-25
1977-06-07
Smith, Jr., David
Electricity: circuit makers and breakers
Float
Float and pressure
H01H 3540
Patent
active
040285120
ABSTRACT:
A liquid level signaling electrical switch operated by a float protected within a container in the tank being monitored for level so that only slow changes in level are allowed to influence the float position thereby substantially eliminating flickering of the signal lamp upon sudden changes in tank level at the float due to bump vibration, hill angulation, turns, and sudden starts and stops shifting the liquid in the tank off true gravational level. The float closes the switch at substantially true refill level by locating a magnet closer to an armature when the switch closes so that the magnet exerts strong magnetic force holding the switch closed thus also preventing flickering of the signal lamp. The float container and switch are integrated in a removable assembly together with a liquid supply tube, filter foot, and base connector so that complete assembly of parts is feasible outside the tank obviating separately installing parts in the tank.
REFERENCES:
patent: 1244962 (1917-10-01), Derby
patent: 1783448 (1930-12-01), Penn
patent: 1935029 (1933-11-01), Henning
patent: 2973415 (1961-02-01), Bryan
patent: 3256400 (1966-06-01), Wintriss
patent: 3260815 (1966-07-01), Trimmer
patent: 3931485 (1976-01-01), Spielfidel et al.
Sevald William T.
Smith Jr. David
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