Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1989-03-21
1990-10-09
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310325, 310334, 181 05, H01L 4108
Patent
active
049623303
ABSTRACT:
A horn is described for transmitting sound from a transducer to a heated chamber containing an object which is levitated by acoustic energy while it is heated to a molten state, which minimizes heat transfer to thereby minimize heating of the transducer, minimize temperature variation in the chamber, and minimize loss of heat from the chamber. The forward portion of the horn, which is the portion closest to the chamber, has holes that reduce its cross-sectional area to minimize the conduction of heat along the length of the horn, with the entire front portion of the horn being rigid and having an even front face to efficiently transfer high frequency acoustic energy to fluid in the chamber. In one arrangement, the horn has numerous rows of holes extending perpendicular to the length of horn, with alternate rows extending perpendicular to one another to form a sinuous path for the conduction of heat along the length of the horn.
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Bhat Balakrishna T.
Leung Emily W.
Lierke Ernst G.
Budd Mark O.
Jones Thomas H.
Manning John R.
The United States of America as represented by the Administrator
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