A trembler, as of an electric bell. (2)
A vibrating reed for transmitting or receiving pulsating currents in a harmonic telegraph system. (3)
A device for vibrating the pen of a siphon recorder to diminish frictional resistance on the paper. (4) An oscillator.
An ink-distributing roller in a printing machine, having an additional vibratory motion.
An attachment, usually pneumatic, in a molding machine to shake the pattern loose.
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