Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 371
orrectness and power of discharge to ber, but exactly opposite in direction, be- others. tween each. To insure an even flow, which was the A patentee of 1851 places a similar only condition under which these meters drum, but rather longer, on a valve seat- would work accurately, and to prevent ing… … series of drums and guides, and occasion- By one arrangement the water is required ally choose to admit the water without to raise a clack-valve, held down to its seat guides, simply between two reversed by a delicate spring before it can impinge drums on the same spindle. The accuracy against the…
Engineering
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