| 摘要 |
A retrofit mechanism for automatic lawn sprinkler systems. An electrical latching switch which when successively energized switches energizing power to one of two or more conductive paths is housed in a waterproof casing. The retrofit mechanism is installed near an existing electrically operated control valve in an automatic lawn sprinkler control system. The latching switch is wired to the system controller by the wire originally connected to the existing valve. The existing valve and one or more new valves are connected to the conductive paths of the retrofit mechanism. Thus, new valves are added to the automatic sprinkler system without running wiring and conduit between the new valves and the existing controller.
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