spark gap
Noun
Meaning
the gap between two high-potential terminals
a component of an ignition system; consists of two shaped electrodes and the space between them
Source: WordNetSynonyms
Hypernyms
Examples
Although electronic circuit controllers have been developed, Tesla's original spark gap design is less expensive and has proven extremely reliable.
Although previous transmitters were bulky and the spark gap system of transmission was difficult to use, there had been some earlier attempts.
An AC voltage from a high voltage supply transformer charges a capacitor, which discharges through the spark gap.
A typical high-power spark gap was a rotating commutator with six to twelve contacts per wheel, nine inches (229 mm) to a foot wide, driven by about 2,000 volts DC.
Depending on how the spark gap is set, usually one or two sparks occur at the peak of each half-cycle of the mains current, so there are more than a hundred sparks per second.
Each spark across the spark gap produces a pulse of damped sinusoidal high voltage at the output terminal of the coil.