| 摘要 |
PURPOSE:To establish the crystal oscillator having the constant temperature tank which can reduce the leading time, by sealing hydrogen or helium gas in the case containing crystal oscillator. CONSTITUTION:The crystal oscillator 1 is held in the vessel 11 made of glass tube or the like in hermetic seal with the support and leading wire 13. The gas such as hydrogen and helium is sealed in the vessel 11. The crystal oscillator assembly like this is used in the known thermostat and it quickly follows to the temperature change after the thermostat starts the operation. Accordingly, the time of the crystal oscillator from the room temperature to the constant temperature can be reduced. |
