The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose; (1902)
Barber, Thomas Walter. [from old catalog] · New York, Spon & Chamberlain · leaf 207
to any lower pressure. 1628. Another form, with spring balance adjustment and equilibrium valve. 1629. Equilibrium valve. 1630. Equilibrium valve, not steam tight, but serrated, to cut off graduallv, employed for governors of steam engines. 1631. Equilibrium cylindrical grating valve, may be used…
Mechanical movements
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