| 摘要 |
PCT No. PCT/FR89/00307 Sec. 371 Date Apr. 11, 1990 Sec. 102(e) Date Apr. 11, 1990 PCT Filed Jun. 16, 1989 PCT Pub. No. WO89/12929 PCT Pub. Date Dec. 28, 1989.A piezoelectric resonator (1) consists of a piezoelectric reed (2) encased in a housing composed of a cap (7) and a base (8). The resonator (1) is placed in a thermostatically controlled containment (10). The thermostatically controlled containment (10) consists of an inner cell (40) which is screwed into an outer cell (30). These cells (30, 40) each possess sides (34, 44) and a bottom (35, 45). A thermal seal (16) is inserted between the bottom (35) of the outer cell (30) and the bottom (45) of the inner cell (40). The cap (7) of the resonator is soldered over its entire outer surface to the sides (44) and to the bottom (45) of the inner cell (40). The thermostatically controlled containment (10) is placed in a secondary containment (21). A narrow space (22) separates the two containments (10, 21), and the surface of the contact between the two containments is as small as possible. The invention is used for ultrastable on-board oscillators.
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