Fluid reaction surfaces (i.e. – impellers) – With measuring – testing – signalling or inspection means
Patent
1987-04-07
1988-08-09
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
With measuring, testing, signalling or inspection means
416170R, 416 5, 417572, F04B 2100
Patent
active
047624639
ABSTRACT:
A multispeed ceiling fan having a plurality of blades, a speed-selecting switch and an a.c. split-phase induction motor. The motor has a rotor and at least one stator winding. The speed selecting switch is arranged to apply respectively different voltages or currents to the motor for each respective selected speed. At least one lamp is connected in parallel to either the main stator winding or in parallel to a phase-shifting capacitor in series with an auxiliary stator winding, as an indicator providing a visible indication of the selected speed for the motor. The at least one lamp may comprise a plurality of lamps, at least all but one being in series with a respective plurality of Zener diodes so that they become energized in sequence as the voltage across the respective lamps or across the lamps in series with the respective pluralities of diodes increases.
REFERENCES:
patent: 2912159 (1959-11-01), Ganger et al.
patent: 4494055 (1985-01-01), Bitting
patent: 4675663 (1987-06-01), Corwin
Bloom Leonard
Powell Jr. Everette A.
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