Conveyors: power-driven – Conveyor system having a gravity conveyor section – Condition responsive
Patent
1982-06-18
1984-12-11
Spar, Robert J.
Conveyors: power-driven
Conveyor system having a gravity conveyor section
Condition responsive
198856, 198657, 340674, 200 6109, B65G 4300
Patent
active
044873107
ABSTRACT:
A metal detector device for an auger feed granulator is provided in association with the auger trough and comprises a plurality of first conductive plate elements in spaced-apart disposition axially along the bottom portion of the auger trough and a plurality of second conductive plate elements in spaced apart disposition axially along the bottom portion of the auger trough with each second plate element being disposed between adjacent pairs of first plate elements. The first and second plate elements are electrically insulated and have an upper portion disposed adjacent but spaced from the outer circumferential edge of the auger. An electrical circuit for detecting any metal object simultaneously contacting any one of the first plate elements and any one of the second plate elements is electrically connected thereto. The electrical circuit includes circuitry for producing a voltage potential between the first plates and the second plates and for detecting an electrical connection between any one of the first plates and any one of the second plates as caused by a metal object. The circuitry includes a relay and switch for deactivating the auger motor upon detection of a metal object.
REFERENCES:
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patent: 4161251 (1979-07-01), Paul
Holmes Jonathan D.
Polymer Machinery Corporation
Spar Robert J.
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