Adjustable drive vibratory device

Details Adjustable drive vibratory device Adjustable drive vibratory device

1974-01-23

1977-04-05

Blunk, Evon C.

Conveyors: power-driven

Conveyor section

Reciprocating conveying surface

318230, B65G 2732

Patent

active

040157059

ABSTRACT:
The present invention provides an adjustable drive vibrating device, such as a vibrating conveyor, vibrating feeder and the like. Basically, the device comprises: a container, means mounting the container such that it can vibrate as a free mass, drive means including an electric motor for vibrating the container at a prescribed frequency and stroke, and control means for selectively adjusting voltage applied to the motor and thereby selectively altering the frequency and stroke at which the container is vibrated by the drive means. However, in particular accordance with the present invention, the drive means motor comprises a three-phase A.C. squirrel cage electric motor, and the control means adjust the voltage applied to only two of the three phases of the motor, while a substantially constant voltage is maintained on the third phase of the motor.

REFERENCES:
patent: 1113289 (1914-10-01), Barnum
patent: 1647295 (1927-11-01), James
patent: 1928681 (1933-10-01), Beling
patent: 2440319 (1948-04-01), Wickerham
patent: 2571454 (1951-10-01), Jones et al.
patent: 2698542 (1955-01-01), Fisher-Luttrelle et al.
patent: 3251457 (1966-05-01), Dumbaugh
patent: 3346795 (1967-10-01), Linke

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