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But it's all right with me I'll be glad to let you do it. When I say 'shoot' throw in that plunger there number sixty-three." Seaton manipulated controls until two electrodes of force were clamped in place, one at either end of the huge power-bar of the enemy vessel; adjusted rheostats and forces to send a disintegrating current through that massive copper cylinder, and gave the word.
Three persons grasping hands and standing upon blocks of paraffin twelve inches square and six thick drew sparks from the adjoining stove when another person touched the sounder with any piece of metal.... A galvanoscopic frog giving contractions with one cell through two water rheostats was then placed in circuit.
Then at last even these had been put in place, and with the aid of Fuller, Morey junior, and his own father, Arcot had connected their many complicated circuits. "Son," remarked Arcot senior, looking critically at the great switchboard, with its maze of connections, its many rheostats and controls, and its heavy bus bar connectors behind it, "no one man can keep an eye on all those instruments.
This neutralized the "tailing" effect by clearing the line between pulsations, thus allowing the telegraphic characters to be clearly and distinctly outlined upon the tape. Further elaboration of this method was made later by the addition of rheostats, condensers, and local opposition batteries on long lines.
Furthermore, he rebuked himself, if the panels never mind how many or how forbidding with their lights, bells, buzzers, switches, relays, dials, gauges, styles, tapes, pointers, rheostats and buttons had any meaning, and in fact if the Tower itself had any meaning at all, that meaning was Control.
In 1873, or thereabout, he claimed to have observed, while constructing rheostats, or electrical resistances for making an artificial telegraph line, that powdered plumbago and carbon has the property of varying in its resistance to the passage of the current when under pressure. The variation seemed in a manner proportional to the pressure.
Kemp pushed the striker button and the torch flared. "Watch your eyes," he warned. The Planeteers reached for belt controls and turned the rheostats that darkened the clear bubbles electronically. Kemp adjusted his flame until it was blue-white, a knife of fire brighter by far than the sun.
Rheostats, wheatstone bridges, polarized relays, pole changers, and ground switches became as familiar to me as the old relay key and sounder had been.
As a matter of fact, powdered carbon and plumbago had been used in making small adjustable rheostats by M. Clerac, in France, and probably also in Germany, as early as 1865 or 1866. Clerac's device consisted of a small wooden tube containing the material, and fitted with contacts for the current, which appear to have adjusted the pressure.
Although narrow-waisted and, for his heft, broad-shouldered, he was built for speed and maneuverability, not to haul freight. Watching a hundred lights and half that many instruments, listening to two phone circuits, one with each ear, and hands moving from switches to rheostats to buttons and levers, he was completely informed as to the instant-by-instant status of everything in his department.
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