[PT031AAE1], Technical Note, Thomas Alva Edison, February 3rd, 1889


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[PT031AAE1], Technical Note, Thomas Alva Edison, February 3rd, 1889

Editor's Notes

Dyer= I am putting several inventions in this Caveat merely want to get it in patent office for dating purposes-- [first 10 of 25 pages of text are gold ore milling related; then Kinetoscope; mailing cylinders, collapsible; typewriter; shaving knife and related mechanisms for phonograph; disc phonograph; recorder and reproducer spectacle; duplciating apparatus; another shaving knife; vulcanized rubber blank for phonograph cylinders, also wood coated with asphalt and hard rubber, all veneered with recording material, discusses coefficient of expansion as in patent app of around this time and need for cheap material; returns to pyrite ore separation; then filaments of carbon treated with coatings and also a filament of Osmium; then back to making phonograph cylinders and use of a split mould; determining point for phonograph; also listening tube -- all followed by the illustrations] Here is the Kinetoscope text: "Fig 19 Is a Kinetoscope for recording and reproducing moving objects photographically-- 14 is the cyliner The cylinder is not round but parallel with its length are a number of flat places about 1/32 wide This gives a flat face for the photographic record from the microscope & the picutre is not thrown out of focus as it would be if the cylindrical surgace was round, especially on very small cylinders which it is necessary to use on a commecial appaaratus. 19 is a motor. 17 a friction. 18 a pulley 16 a belt. 15 a pulley on the cylinde shaft. 25 a escapement wheel worked by escapement. Connected to lever 23. 24 is magnet which gives motion to lever 23 & escapement 21 &22 limiting stops to lever 23. 20 is the extended shaft of cylilnder provided with a leaf or key 12 is the thread or screw part, having about 25 threads to the inch 13 is the screw nut which engages in the threads on 12 1, 2, 2, 4, are a similar magnet to 24 with lever limiting stops & escapement & wheel-- A shaft .6. carris the revolving shutter 7 in front of the objective 8 6 is pivoted at 9 on a bridge 10. 27 is a camera etc. The two magnets are aranged in two circuits provided with break & contact wheels bothon one shaft so that any definite movement one related to the other can be obtained. These breaks wheels are rotated by a governed motor. The action is as follows: The cylinder stands still. The shutter advances & opens the shutter while the cylndder is still the phonographic effect takes place on the flat of the cylinder; the shutter closes then the cylinder advances another notch but such advance onkly takes place while the shutter closes off the light. These actions take place continuously at the rate of 15 or 20 times per second. 26 shews the cylinder with flattened parts



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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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