Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 231
ought the idea very prac-ticable, as he adds a pulley Z for this purpose. In the ma-chine shown in the lower figures the frame K is in the formof a ring surrounding the armature, which is stationary,and the machine otherwise substantially identical with theWaterhouse device. No. 276,390, April 24,… … O < in stationary transformers over the old Ruhmkorff coil. A \still better way of accomplishing this is shown by Jehl/^ in 12 No. 278,418, May 29, 1883.No. 379,073, March 6, 1888. Mar., 1901.] Rotary Tratisformers. 221 a patent issued in 1888 (Plate VI). Here we have twoGramme rings in…
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