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August Eckstein
Arthur Cecil Heap
David Barclay Mellis
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Publication of GB190714567ApublicationCriticalpatent/GB190714567A/en
14,567. Eckstein, A., Heap, A. C., and Mellis, D. B. June 25. Signals, electric.-In a solenoid-operated switch for alternating-current cirouits, the winding D of the solenoid is tapped in order that an indicator E, which shows whether the switch is closed or open, may be connected to the circuit. The indicator may be placed in any desired position at any distance from the switch.
GB190714567D1907-06-251907-06-25Improvements in Electrically Operated Electric Switches.
ExpiredGB190714567A
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