US Patent: 364,913
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| Micrometer Gage
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Patentee:
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| Albert H. Emery (exact or similar names) - Stamford, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 20, 1886 |
| Granted: |
Jun. 14, 1887 |
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Joel Havens
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Description: |
| This improved gage is constructed with a pair of parallel moving jaws, with one or more guide-bars fixed in one of said jaws and upon which the other jaw slides, and with a micrometer-screw turning in one jaw and working in a screw-socket in the other to set the jaws at the required gage distance. Each jaw is made of separable parts and provided with setscrews to preserve the necessary closeness of fit; between the respective sockets and the guide-bars and micrometer-screw. The graduated head or collar of the micrometer-screw is made adjustable and clamped between a collar on the screw and a pair of lock-nuts, so that it may be set accurately at zero when the jaws are in contact. The paired jaws are constructed with two or more pairs of external gaging faces for internal measurements, affording wide range of capacity with a small movement of the jaws, and they are provided with extension gage-legs affording still greater capacity. The two ends of the paired jaws are diverse, the said jaws coining close together at one end, while at the other end they diverge to a distance equal to the entire movement of the jaws. This provision affords great range of adjustment for external measurements. For example, supposing the possible movement of the jaws to be one and one-half inch, accurate outside measurements up to this limit may be taken by the use of one end of the instrument, while the other end, beginning at one and one-half inch at its closest adjustment, will give accurate measurements from this up to three inches. To enable the handling of the gage without changing the dimensions of its parts by the communication of heat from the hand of the user to the metal of which the gage is made, it is provided with holding-buttons of wood or other material which is a poor conductor of heat, and these buttons are preferably made with concave faces. |
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