Timer arrangement

Details Timer arrangement Timer arrangement

1977-03-21

1978-05-30

Schaefer, Robert K.

Electricity: circuit makers and breakers

Retarded

Clock train

307141, 239 70, H01H 4310

Patent

active

040925056

ABSTRACT:
A program expander for a sprinkler valve timer, alternates a pair of valve selector switches each having a plurality of sprinkler valves connected thereto. The expander includes a star wheel attached to the shaft of a double wafer rotary switching arrangement and a lug on a motor driven timing disk which engages the star wheel once at the end of each revolution thereof, thereby advancing the switching arrangement one position. The expander further includes a bank selector switch which connects valve actuating power alternately to one valve selector switch and then the other, and a disk motor switch which delays disconnecting the disk motor until the end of every other revolution of the disk in cooperation with a motor stop switch actuated by the timing disk and operative to disconnect the disk motor switch at the end of each revolution of the disk.

REFERENCES:
patent: 3207866 (1965-09-01), Hicks
patent: 3377446 (1968-04-01), Davis
patent: 3736391 (1973-05-01), Caviar
patent: 3740575 (1973-06-01), Bizzoco

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