GB283596A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Improvements in or relating to piezo electric devices
Assignee: Marconis Wireless Telegraph Co Ltd
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Filing: 1928-01-14
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Granted: —
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Expires: 1948-01-14
Abstract
Abstract 283,596. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Hansell, C. W.). Jan. 15,1927, [Convention date]. Piezo-electric crystal units.-A piezo-electric resonator P is mounted in a casing C provided with heating means 11 and automatic control means to maintain the temperature constant. The Figure shows a thermometer 13 adapted at a predetermined temperature to apply a large negative bias to a thermionic valve 10 to cut off the anode current through the heating resistance 11.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 00:46
CPC Classifications
H; H03; H03L; H03L1/00; H03L1/02; H03L1/04
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