Railways – Trolley transfer
Patent
1979-02-15
1981-01-06
Bertsch, Richard A.
Railways
Trolley transfer
104130, 104172R, 104172C, B65G 1700
Patent
active
042429650
ABSTRACT:
A carrier conveyor comprising a main runway and a secondary runway each including a chain to which are secured stationary lugs for continuously driving carriers on a runway. A first auxiliary way includes a chain which is arranged to be moved in synchronism with the main chain and has lugs for driving carriers from a waiting position of the secondary way to the main way. Each retractable lug is returned by a spring to an engaged position for driving a carrier. A second auxiliary runway includes a chain which is arranged to be moved in synchronism with the main chain and has lugs for driving carriers from the main way to a stop position of the second auxiliary runway upstream of the secondary runway. A first electromechanical transfer device transfers a carrier from the waiting position onto the first auxiliary runway by an engaged lug of the first auxiliary chain. Movable means disengages selectively the retractable lugs of the first auxiliary chain from the carrier path when no carrier is to be transferred. A retractable lug at the disengaged position is not in contact with carriers at the waiting position. A second electromechanical transfer device transfers a carrier from the stop position to the secondary way. It comprises pivotable means which stops at the stop position a carrier previously driven by the second auxiliary chain, and means slidable along and retractable from the carrier path which pushes the stopped carrier between two stationary lugs of the secondary chain and which simultaneously pushes and disengages the pivotable stopping means from the carrier path.
REFERENCES:
patent: 1124273 (1915-01-01), Bernheim
patent: 3581670 (1971-06-01), Larivee
Bertsch Richard A.
Saffitz Abraham A.
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