Title:
Ultrasonic transmitter apparatus
United States Patent 2799787

Inventors:
Werner, Guttner
Robert, Bastir
Gunter, Pickel
Publication Date:
07/16/1957
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Assignee:
SIEMENS REINIGER WERKE AG
Primary Class:
318/116
Other Classes:
310/317, 73/632, 601/2, 331/183
International Classes:
B06B1/02
US Patent References:
2594841Piezoelectric transducer with pushpull and feedback circuit
2609510Electronic heating control system
2647983Power regulation in high-frequency heating apparatus