VIBRATORS
Noun
vibrators
plural of vibrator
Source: Wiktionary
VIBRATOR
Vi"bra*tor, n. One that vibrates, or causes vibration or oscillation
of any kind; specif.
(a) (Elec.) (1)
Definition: A trembler, as of an electric bell. (2)
Definition: A vibrating reed for transmitting or receiving pulsating
currents in a harmonic telegraph system. (3)
Definition: A device for vibrating the pen of a siphon recorder to diminish
frictional resistance on the paper. (4) An oscillator.
(b) An ink-distributing roller in a printing machine, having an
additional vibratory motion.
(a) (Music) A vibrating reed, esp. in a reed organ.
(d) (Weaving) Any of various vibrating devices, as one for
slackening the warp as a shed opens.
(e) An attachment, usually pneumatic, in a molding machine to shake
the pattern loose.
Source: Webster’s Unabridged Dictionary 1913 Edition