from the GNU version of the Collaborative International Dictionary of English
- n. A key or other device for breaking an electrical circuit.
from The Century Dictionary and Cyclopedia
- n. Any device for opening or closing an electrical circuit; a circuit-breaker.
Sorry, no etymologies found.
In the former case the break-circuit worked a relay which interrupted the current from three
The time was given either by a sidereal break-circuit chronometer or by the break-circuit pendulum of a mean-time clock.
The fork was wedged into a wooden support, and the platinum tip allowed to rest on lampblacked paper, wound about a metal cylinder, which was rotated by hand Time was given by a break-circuit clock, the rate of which was ascertained, by comparisons with Western Union time-ball, to be 9.87 seconds.
A break-circuit will do what it says, no doubt about it.