US Patent: 456,875
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| Micrometer Gage
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Patentee:
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| Stephen H. Bellows (exact or similar names) - Athol, MA |
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Patent Dates:
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| Applied: |
Dec. 04, 1890 |
| Granted: |
Jul. 28, 1891 |
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Joel Havens
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Description: |
| This invention relates to the micrometer gage for which Letters Patent No. 403,726 were issued to me May 21, 1889, and has for its objects to improve the prior instrument by providing novel means whereby the adjustment of the slide from one graduation to another on the beam or bar can be quickly and accurately effected without special care or skill on the part of the workman; to provide a novel construction by which the instrument is rendered more accurate and correct in practical use avoiding the possibility of errors arising from inaccurate adjustments of the index-line on the slide relatively to the line-graduations on the beam or bar; to provide a novel stop-pin graduation on the beam which can be readily renewed if worn, or if improperly set or produced in the manufacture of the instrument; to provide a novel device on the slide which coacts, with the stop-pin graduations on the beam for accurately adjusting the slide to and from the fixed jaw of the instrument; and, finally, to provide novel means for instantly locking or holding the micrometer-screw in its position of adjustment, and thereby preventing accidental displacement or movement of the screw in handling the instrument after it has been properly adjusted for the measurement desired.
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