Vibrator

Part of speech: noun (n.)

1. A trembler, as of an electric bell. (2)

2. A vibrating reed for transmitting or receiving pulsating currents in a harmonic telegraph system. (3)

3. A device for vibrating the pen of a siphon recorder to diminish frictional resistance on the paper. (4) An oscillator.

4. An ink-distributing roller in a printing machine, having an additional vibratory motion.

5. An attachment, usually pneumatic, in a molding machine to shake the pattern loose.