Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 110
Fig. 98. THE INDICATOR. 93 Thompson indicator, unscrew the small milled nut by which the piston-rod is attached to the pencil lever. Then unscrew the cylinder cover,and remove the cover, spring and piston. Unscrew the spring fromthe cover, and lastly from the piston. Proceed in the reverse order… … Fig. 99. most noticeable feature of this indicator is the means employed t-osecure a straight-line movement of the pencil. A jjlate G containinga curved slot is fixed in an upright position, and a roller fixed to the 94 STEAM-ENGINE THEORY AND PRACTICE. pencil lever H is fitted so as to roll freely…
Steam-engines
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