US Patent: 336,812
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| Instrument for Measuring the Mean Height of Steam Engine Indicator Diagrams
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Patentees:
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| Ernest Kimmel (exact or similar names) - Providence, Providence County, RI |
| Edward E. Claussen (exact or similar names) - Providence, Providence County, RI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 08, 1884 |
| Granted: |
Feb. 23, 1886 |
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Joel Havens
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Description: |
| Abstract:
An apparatus embodying said improvement in many respects resembles what are known as "polar planimeters," but instead of being designed for the measurement of irregular areas, it is so graduated and provided with means for its accurate adjustment to the length of diagrams of which the mean height is desired that after following the outlines of such a diagram its height can be at once read off in inches and fractions of an inch. Like one well-known form of polar planimeter, this instrument has a measuring-wheel, a vernier, a fulCrum bar or arm, and a tracer bar or arm, but, unlike any of which we have knowledge, it has a measuring-wheel graduated for indicating the measurement of the distance traveled by it, and gage-points by which the distance between the periphery of the wheel and the tracer-point can be exactly adjusted with relation to the vertical boundaries or end lines of a diagram, and the measuring-wheel and vernier are so graduated that it will directly indicate the height of such diagram in units after the usual tracing movements, if the adjustment referred to has been first accurately made.
Claim:
In an instrument for measuring the mean height of steam-engine-indicator diagrams, the combination, substantially as described, of the fulcrum-bar, the longitudinally adjustable tracer-bar, the vernier, and the measuring- wheel graduated to indicate its peripheral measurement in linear inches and fractions of an inch. |
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