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 28
3kefch showing orroncjeimenf ofWooden Frame for Inaicdtor Pi5fon5 and Exten^omettr … Sketch showing cross-aectior? ofAmea Exten5ometer 11. the rack a spring brings the needle back to its initial poeitionon the dial. Before we could use the extensoFieter to measure thedifference of pressure on the pistons of the gage, it was necessaryto calibrate the spring. This was done by…
