Century Dictionary and Cyclopedia
- n. An indicator-card taken by a steam-engine indicator from the end of the cylinder above the piston, in Cornish pumping-engines operating with a beam. This was quite different from the card taken below the piston (or bottom-card), since the work of lifting the massive pump-rods was done on the lifting stroke, with steam pressure from the boiler on top of the piston. The bottom-card showed only the equalizing and the condenser pressures.
- n. In a carding-machine, a top-flat.
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