A recording device for indicating (a) the flow of water in pipes, (b) the speed of boats (1909)
Baldwin, Frank Boyd, Hiveley, Oscar George · leaf 42
ondiaphragm No. 1, which was made of copper of gage No. 37. It wasfound that this diaphragm was very sensitive and that it was use-ful for differences of pressure up to about 0.7 of a pound persquare inch, but at this point the movement was limited by thecase. A curve was plotted of the results… … Cro5b dec f ion of bracode, holdincj cliaphroqm
