| 摘要 |
Disclosed is an electronic-measuring device particularly suited for use as a grinder gage. The apparatus produces a visual digital display of a work piece dimension, such as the diameter of an object being ground. The gage includes three probes. Two of the probes (first and third) are movable over a coarse travel and the other probe (second) is movable over a fine, high-quality travel. The coarse travel is produced by the action of a manual operating lever and cam mechanism which bring the three probes into contact with the object to be measured. After contact, the operating lever and cam mechanism lock the first and third probes while unlocking the second probe. The second probe when unlocked maintains contact with the work piece over the fine travel while exerting a substantially constant force against the object during the fine measurement. The first and second probes are connected respectively to continuously operating first and second movable elements of a position-measuring device, such as an Industosyn (trademark) transducer. The third probe, which moves with the first probe, maintains the first and second probes colinear along a diameter of the object being measured.
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