air gap

noun

Electricity. the space between two objects magnetically related, as between the rotor and the stator in a dynamo, or between two objects electrically related, as between the electrode and the tip of a spark plug.

Origin of air gap

First recorded in 1895–1900

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for air gap

Historical Examples of air gap

By bending this stop the air-gap between the points may be decreased.
The Automobile Storage Battery
O. A. Witte
Spark-gap, with the hyphen, means the air-gap between the opposed faces of the electrodes in which sparks are produced.
The Radio Amateur's Hand Book
A. Frederick Collins
The air-gap is determined by the thickness of the separator between the carbon blocks.
Cyclopedia of Telephony & Telegraphy Vol. 1
Kempster Miller
The Kellogg Company regularly equips its magneto telephones with air-gap arresters of the type shown in Fig. 211.
Cyclopedia of Telephony & Telegraphy Vol. 1
Kempster Miller
Fig. 213 suggests the relation between such an impedance and air-gap arrester.
Cyclopedia of Telephony & Telegraphy Vol. 1
Kempster Miller