Conveyors: power-driven – Conveyor system for arranging or rearranging stream of items – By queueing items from quantity source of items into stream...
Patent
1993-08-20
1994-12-13
Gastineau, Cheryl L.
Conveyors: power-driven
Conveyor system for arranging or rearranging stream of items
By queueing items from quantity source of items into stream...
198751, B65G 4300
Patent
active
053722370
ABSTRACT:
A system controls the feed rate of parts delivered by a parts feeder having a vibrating unit to be vibrated with a predetermined amplitude for delivering parts and a driving unit for driving the vibrating unit. The control system has a parts detector for detecting parts delivered by the vibrating unit. A power transistor bridge supplies an alternating driving electric current to the driving unit. A driving voltage controlling circuit applies a predetermined direct current voltage to the power transistor bridge. A power transistor base driving circuit causes the power transistor bridge to function at a predetermined driving frequency. A central processing unit measures the supply rate of parts based on a signal transmitted by the parts detector and transmits a signal for regulating the driving voltage to the driving voltage controlling circuit and a signal for regulating the driving frequency to the power transistor base driving circuit in response to the supply rate of parts.
REFERENCES:
patent: 4382527 (1983-05-01), Lerner
patent: 4394896 (1992-07-01), McComas et al.
patent: 4456822 (1984-06-01), Rose et al.
patent: 5083654 (1992-01-01), Nakajima et al.
Gastineau Cheryl L.
Yoshida Kogyo K.K.
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