. Bulletin - United States National Museum. Science. W. 0, PRICE. CdEEENT METER, No. Patented May 18. 1897 Figure 17.—The Price Acoustic current meter. {Photo courtesy of 11'. and L. E. Gurley.) A photograph of a Price Acoustic current meter is shown in figure 17 and a copy of the patent drawing in figure 18. Its name was derived from the manner in which sound was conducted from the meter to the ear of the hydrographer. As the impeller revolved, a worm gear located within the enlarged section of the suspension rod caused its associated worm wheel to make 1 revohition for every 20 revol
. Bulletin - United States National Museum. Science. W. 0, PRICE. CdEEENT METER, No. Patented May 18. 1897 Figure 17.—The Price Acoustic current meter. {Photo courtesy of 11'. and L. E. Gurley.) A photograph of a Price Acoustic current meter is shown in figure 17 and a copy of the patent drawing in figure 18. Its name was derived from the manner in which sound was conducted from the meter to the ear of the hydrographer. As the impeller revolved, a worm gear located within the enlarged section of the suspension rod caused its associated worm wheel to make 1 revohition for every 20 revolutions of the impeller (see figure 18). Projecting from one side of the worm wheel were two short pins, 180 degrees apart. Each pin, in its turn, caused a small, spring- actuated hammer to he pushed downward against the spring during 10 revolutions of the impeller. At the tenth revolution, the pin automatically disengaged itself from the hammer mechanism. The hammer then flew up and struck a diaphragm situated across the top of the chamber, thus creating a sharp sound. Then the second pin started depressing the hammer, and the process repeated itself over and over again as long as the impeller continued to revohe. The sound caused by the hammer striking the diaphragm every. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
