Timer-controlled speed changing device for electric fans

Details Timer-controlled speed changing device for electric fans Timer-controlled speed changing device for electric fans

1981-04-21

1982-12-28

Weldon, Ulysses

Electricity: motive power systems

Induction motor systems

Primary circuit control

318445, H02P 126

Patent

active

043664253

ABSTRACT:
A timer-controlled speed changing device for electric fans comprising a timing switch operatively connected to a first speed changing circuit and a second speed changing circuit, for changing the speed of an electric fan from a pre-set speed with the first or second speed changing circuit to another pre-set speed with the second or first speed changing circuit after a predetermined time period set by the timing switch.

REFERENCES:
patent: 2081977 (1937-06-01), Bendz
patent: 2091665 (1937-08-01), Weber
patent: 2752044 (1956-06-01), Olcott
patent: 3248632 (1966-04-01), Bowman
patent: 3594625 (1971-07-01), Richardson

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