Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 758
very high speed cannot be indicated bythe forms of indicator just described. They have beenfound to be reasonably accurate at speeds as high as 500revolutions per minute, although at this speed they can beused successfully only by experienced hands. Indicators for High Speed.—To overcome this… … TOP or TRIPOD STAND Fig. 310 are now used. In this case a small mirror is caused tomove in two planes at right angles to each other, one move-ment being produced by the motion of the piston, the otherby the pressure, which is transmitted through a thin steeldiaphragm. The angular motion of the…
