Digital indicating type dimension measuring instrument
AssigneeMitutoyo Mfg. Co., Ltd.
InventorMunenori Ishii
Life of this patent
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Abstract
This invention relates to a digital indication type dimension measuring instrument provided with a shock absorbing mechanism for controlling an overspeed of a spindle. The shock absorbing mechanism is provided with a pressure adjusting device which comprises a valve chamber having a communication hole communicated with a pressure chamber in a cylinder, an open hole communicated with the atmosphere and a ball valve for suitably opening or blocking the communication hole. When the spindle is inclined to a predetermined angle of inclination or more, the ball valve opens the communication hole to release a pressure fluid in the cylinder to the atmosphere.
Claims8
In a digital indication type dimension measuring instrument, wherein a spindle having a measuring element is resiliently biased in one direction on the axial line thereof, said spindle is provided with a dashpot type shock absorbing mechanism using air as a pressure fluid, means is provided for converting a displacement value of said spindle into an electric signal and digitally indicating same, the improvement comprising wherein said shock absorbing mechanism is provided with pressure adjusting means for exhausting said pressure fluid to the atmosphere in accordance with the inclination of said spindle to adjust the pressure of said pressure fluid.
A digital inclination type dimension measuring instrument, comprising:
- a main body provided with an indication means for digitally indicating a measuring value, a spindle axially movably supported on said main body, biased in a predetermined direction through a biasing means and provided at the forward end thereof with a measuring element, a displacement detection means incorporated in said main body for detecting a movement value of said spindle in an axial direction, and a shock absorbing mechanism including a piston provided at the other end of said spindle and reciprocally received in a cylinder secured to said main body;
- and further, said shock absorbing mechanism being provided with a pressure adjusting means for adjusting the pressure of a pressure fluid in a pressure chamber when said spindle is inclined to a predetermined angle of inclination or more.
Dependencies are inferred from the claim text.