The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 125
such avalve; but by the combination of the principle of the equilibriumvalve with that of the ordinary pot-lid or spindle valve, a point ofadjustment may be arrived at where the valve will open with suflS-cient facility, without being closed with an injurious force. This will be better understood… … be the force requisite to open it; and if the faces were brought intothe same line, no force that the greatest pressure beneath the valvecould produce would ever open the valve. Eg. 2.—Plan of Valve. a a a a a a Fig. 1., is one half of the valve proper, or that partwhich rises to permit the escape…
Architecture · Civil engineering · Science
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