Mounting for plural piezoelectric vibrator units

Details Mounting for plural piezoelectric vibrator units Mounting for plural piezoelectric vibrator units

1977-02-14

1978-09-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310342, H01L 4110

Patent

active

041123247

ABSTRACT:
A piezoelectric vibrator unit has a substantially flat holder case which is provided on one side with a recess or recesses each encasing a piezoelectric vibrator plate. The bottom wall of each recess is provided therethrough with a port or ports each at a position which corresponds to an excitation electrode formed on the vibrator plate. Another side of the holder case is used for masking means for forming, for the micro-adjustment of vibration frequency, a vacuum evaporated film on the excitation electrode.

REFERENCES:
patent: 2327487 (1943-08-01), Bach
patent: 2410193 (1946-10-01), Bach
patent: 2508232 (1950-05-01), Dewey
patent: 2525138 (1950-10-01), Kral
patent: 2705760 (1955-04-01), Minnich
patent: 2824219 (1958-02-01), Fisher et al.
patent: 3047749 (1962-07-01), Fisher
patent: 3359435 (1967-12-01), Webb
patent: 3535569 (1970-10-01), Clawson et al.
patent: 3622816 (1971-11-01), McGrew
patent: 3723920 (1973-03-01), Sheaman et al.
patent: 3988621 (1976-10-01), Nakayama et al.

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