Piezoelectric crystal

• US 3,230,402 A
• Filed: 08/15/1963
• Issued: 01/18/1966
• Est. Priority Date: 08/15/1963
• Status: Expired due to Term

• Current Assignee: Anne B. Nightingale, Richard M. Gutter
• Original Assignee: Anne B. Nightingale, Richard M. Gutter
• Inventors: Nightingale, Anne B., Gutter, Richard M.
• Application Number:
  US04/303,217
• Time in Patent Office: 887 Days
• US Class Current: 310/338
• CPC Class Codes: H03H 9/1007 for bulk acoustic wave [BAW] devices
• CPC Class Codes: H10N 30/30 with mechanical input and electrical output, e.g. functioning as generators or sensors
• CPC Class Codes: H10N 30/886 Mechanical prestressing means, e.g. springs springs in general F16F1/00

Claims

1. AN ELECTRICAL GENERATING DEVICE COMPRISING THE COMBINATION OF A PIEZOELECTRIC CRYSTAL HELD IN A STATE OF COMPRESSION BY COMPRESSIVELY STRESSED THERMOPLASTIC ENVELOPE ENCAPSULATING SAID CRYSTAL, THE SAID COMPRESSION BEING RELEASABLE UPON INTRODUCING THE ENCAPSULATING CRYSTAL AND PLASTIC ENVELOPE INTO AN ENVIRONMENT OF ELEVATED TEMPERATURE NOT TO EXCEED THE PLASTIC FLOW LIMIT OF THE ENVELOPE.