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 62
Sketch showing Rubber Diaphracjm cci:>firon cq^c and pj:>fon connection^ 28. Data Shaet No. 5,Readings taken from test on a soft rubber diaphragm. Thediaphragm was saucer shaped and six inches in diameter,The move-ment was registered on a dial which was divided into degrees. >nce of…
