A spare set of accumulators is provided for every group of instruments in case of the failure of the working set.
For working " double current," two sets of accumulators are provided, one set to send the positive and the other set the negative currents; that is to say, when, for example, a double current Morse key is pressed down it sends, say, a positive current from one set, but when it is allowed to rise to its normal position then a negative current is transmitted from the second set of accumulators.
In all the systems accumulators are required to maintain the light when the train is at rest or is moving too slowly to generate current.
Primary batteries have, in the case of all large offices, been displaced by accumulators.
She is a medical practitioner and she told me that she still uses small accumulators with her patients to assist the healing of wounds.
Strangely enough, the first two types were lead accumulators.
The current is supplied by accumulators, and the switch-board is ^ q attached to the platform in a position convenient for use by the astronome his assistant.
The motion of the sections activates hydraulic rams which charge hydraulic accumulators.
The size of the accumulators employed varies from a cell capable of an output of 8 ampere-hours, to a size giving 750 ampere-hours.
The wave-induced motion of these joints is resisted by hydraulic rams, which pump high-pressure oil through hydraulic motors via smoothing accumulators.