US Patent: 167,364
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| Indicator for Steam Engines
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Patentee:
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| Joseph W. Thompson (exact or similar names) - Salem, Columbiana County, OH |
| USPTO Classifications: |
| 346/5 |
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Patent Dates:
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| Applied: |
Aug. 13, 1875 |
| Granted: |
Aug. 31, 1875 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for American Steam Gauge Co.
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Description: |
| The indicator is designed to register the relative amounts of steam-pressure exerted on :he piston at each portion of its stroke. It's in part, an improvement upon the automatic recording-indicator for which Letters Patent of the United States were granted to C. B. Richards, March 24, 1863, No. 37,980.
Abstract:
The object of the invention is chiefly to reduce the number and weight of the parts composing Richards' recording mechanism proper, tied thus correspondingly reduce their momentum when in action. to the end of securing a more perfect record of the several steam-pressures existing in the engine-cylinder during a given stroke or strokes of the piston. This reduction in momentum is particularly important in relation to quick-stroke engines for the indication given or delineation made on the paper barrel by the marking- point will be more or less imperfect as the momentum of the moving parts is greater or less.
(6) In carrying out my invention I dispense vith a separate holder for, the pencil by which the record is madte on a drum or parer barrel, and attach the pencil directly to he main lever, to which a vertical vibratory movement is imparted by the reciprocation of he spring-piston under the varying pressure of steam in the cylinder. To preserve the desired parallel movement, I pivot the working or marking lever to a movable or oscillating ulerum, connect its free end to a fixed standard by means of a link or bar, and pivot it in- ermediately of said fulcrum aind link directly to thle piston-rocs, wich latter is necessarily vibrated at each movement of the p~iston. The invention further includes a compensating coni- inection or joint between the piston-rod and piston, and the means for adljusting the temn- sion of the spring- of the drum upon which the record is mnade.
Claim:
In a steam-pressure recorder, the combi-nation, with the working-lever, carrying the marker, of a movable fulcrum, a fixed standard, F, and link b, connecting the lever directly to the standard. |
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