| 摘要 |
PROBLEM TO BE SOLVED: To provide a Bourdon tube pressure gage capable of preventing a pointer from becoming out of order greatly from zero graduation even if it is returned into a non-pressure condition after attaching the pointer to a pointer shaft in the non-pressure condition while the pointer agrees with the zero graduation and making the pointer agree with the maximum graduation by plastically deforming a plastically bent arm part of a displacement enlargement mechanism in the maximum pressure applied condition to greatly improve the efficiency of the work for setting to graduation and calibration. SOLUTION: In this Bourdon tube pressure gage, the displacement enlargement link mechanism is composed of a protruding piece 12 attached to a tube tip 1b, a bow-shaped articulated link 23, and a rotary plate 25. A V-shaped arm piece 26 as an adjusting piece in the maximum pressure applied condition in the rotary plate 25 is used, and a bendable nodal point P is provided as a position where it is overlapped on a first turn kinematic pair part 12a of the protruding piece 12 and the bow-shaped articulated link 23 in the non- pressure condition.
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