instructed tion. Fig. 2 is an enlarged view of the valve and its seats. then one and a half pints more water poured into it._ The Mr. Joseph Cragg, Inspector of Steamboats, to examine and The main peculiarities of this valve are in its having a double copper vessel, which must be perfectly clean is… … two to three minutes, when it overcome ; and that it would add becomes green. One pint and to the safety of boilers on board of DOUBLE SEATED LOCK SAFETY VALVE. a quarter of rain water is now steam veBsels." to be added to the solution. The metal is now held over a single disk valve. By reference…
Combination · Purpose · Arranged · Manner · Claim · Constructed · Patents · Set · Patent office · Claim tbe · Purpose set · Double seated · Purposes set · Steam engine · Nerve force · Scientific American · Wrought iron · Tbe purpose
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