Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1976-10-08
1978-08-15
Scott, James R.
Electricity: circuit makers and breakers
Retarded
Clock train
200 38R, 200 38F, 200 80R, H01H 4390, H01H 3510
Patent
active
041074831
ABSTRACT:
A timing device comprises a contact assembly, an acting switch and a centrifugal mechanism rotated by a synchronous motor, and a rotatable resiliently biased timing wheel. The acting switch, upon energization of the motor, is moved axially in a direction parallel to the rotary axis of the timing wheel by the centrifugal mechanism to a first position for rotating the said timing wheel and opening a contact between a movable contact plate and a first fixed contact plate of the contact assembly. The acting switch is maintained in the first position by the timing wheel, and is moved to a second position for maintaining the timing wheel in position and closing a contact between the movable contact plate and a second fixed contact plate of the contact assembly, whereby, upon deenergization of the motor, the switch is moved axially in the reverse direction to its normally inoperative state and said timing wheel is rotated back under the action of its biasing means.
REFERENCES:
patent: 2598481 (1952-05-01), Young
patent: 2868287 (1959-01-01), Estey
patent: 2946902 (1960-07-01), Hagen
patent: 3515972 (1970-06-01), Hurst
patent: 3639135 (1953-05-01), Sloan
Crouzet
Hobbs Marmaduke A.
Scott James R.
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