Acoustic wave guide

Details Acoustic wave guide Acoustic wave guide

1990-01-08

1991-03-12

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73 405A, 73587, 73644, G01N 2914, G01N 2928, F22B 3742

Patent

active

049984390

ABSTRACT:
Acoustic leak detection systems for boilers use wave guide tubes to conduct sound waves through the boiler wall for an environmentally safe location of microphones or transducers. To protect such wave guides from soot plugging, the boiler wall penetrating end of a wave guide is reciprocationally mounted within a soot shield. Linear motors mounted between the wave guide and soot shield base stroke the wave guide axially within the shield to dislodge accumulated soot upon command signal. Compressed air released from within the wave guide, also upon command signal, ejects loose soot particles from interior wave guide surfaces.

REFERENCES:
patent: 3831561 (1974-08-01), Yamamoto et al.
patent: 4498333 (1985-02-01), Parthasarathy
patent: 4502322 (1985-03-01), Tero
patent: 4822428 (1989-04-01), Goodspeed
patent: 4960079 (1990-10-01), Marziale et al.

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