from The Century Dictionary and Cyclopedia
- n. An electric spark which jumps a gap in a previously open circuit: frequently used for igniting the charge in an internal-combustion engine.
Sorry, no etymologies found.
It has a float-feed carburetor, mechanical oiler, and the ignition system is the jump-spark -- the best for this style of motor.
He overhauled the ignition system, which was the jump-spark style, cleaned the magneto and adjusted the gasoline and compression taps so that they fitted better.
"Now in a jump-spark engine," he explained leisurely, with a knowing squint of his eyes and an uplifted explanatory forefinger: "in a jump-spark engine, gentlemen, there is a number of things to consider.