| 摘要 |
PURPOSE:To form a timer having a stable operation, by providing a nonreturn valve and a small hole in the middle of a vessel and sealing up a fluid within the vessel. CONSTITUTION:A partition plate 2 provided with a nonreturn valve 3 and a small hole 4 in the middle of a vessel 1 is provided and the partition plate 2 is supported by a bellows 5. Chambers 6, 7 of the vessel 1 are filled with fluid and sealed. The plate 2 moves around a fulcrum 8 as a center, but the moving time varies in accordance with a moving direction owing to the valve 3. |
