interrupter

A very thin vacuum shutter forms a better interrupter of sound waves than a brick wall two or three feet in thickness.

The interrupter must be Harry Wilbur; nobody else approached door-knockers in so athletic a spirit.

The dual feature consists of the addition to the magneto of a battery interrupter.

This relative timing can be easily adjusted by removing the interrupter and shifting the cam in the direction desired.

This is accomplished by means of an "interrupter" that either vibrates rapidly or "snaps" once at the formation of each spark.