The U.S. Patents of Nikola Tesla

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It well known principle that spring possessing sensible inertia brought un­ der tension, being stretched, and then 60 freed will perform vibrations which are isochronous and, period, the main de­ pendent upon the rigidity the spring, and its own inertia that the system which it may form immediate part. This 65 known true all cases where the force . 514,169, dated February . the other hand, certain cases, where reciprocating engines toolshave been used without rotating system great iner­ tia, attempt, far know, has been 55 made secure conditions which would nec­ essarily yield such results have reached. The further objects the invention are to provide mechanism, capable converting the energy steam gas under pressure into mechanical power more economically 25 than the forms engine heretofore used, chiefly overcoming the losses which result in these the combination with rotating parts possessing great inertia reciprocat­ ing system; which also, better adapted for 30 use higher temperatures and pressures, and which capable useful and practical ap­ plication general industrial purposes, par­ ticularly small units. The invention based upon certain well 35 known mechanical principles statement of which will assist better understanding of the nature and purposes the objects sought and results obtained.nited States Patent Office.attainment the result which 50 have arrived, and attended disadvan­ tages which invention are entirely ob­ viated. which tends bring the spring movable system into given position proportionate to the displacement. NIKOLA TESLA, NEW YORK, Y. SPECIFICATION forming part Letters Patent No. This, while securing measure this object, renders im­ possible the. Heretofore, where the pressure steam any gas has 40 been utilized and applied for the production of mechanical motion has been customary to connect with the reciprocating moving parts the engine fly-wheel some rotary system equivalent its effect and possessing 45 relatively great mechanical inertia, upon which dependence was mainly placed for the , maintenance constant speed. Applicationfiled August 19,1893. R . While, the practice the invention I may employ any kind spring elastic body of which the law principle operation 85 above defined holds true, prefer use an air spring, generally speaking confined body cushion elastic fluid, the me­ chanical difficulties the use ordinary or metallic springs are serious, owing mainly, 90 their tendency break. SerialH o. 483,563, (H om odel,) To all whom concern: Be known that Nikola Tesla, citizen of the United States, residing New York, in thecountyand Stateof NewYork,have in- 5 vented certain new and useful Improvements in Reciprocating Engines, which the fol­ lowing specification, reference being had to the drawing accompanying and forming a part the same, to the invention which forms the subject of my present application, object has been, primarity provide engine, which under the influence applied force such the elastic tension steam gas under pressure 15 will yield oscillatory movement which, within very wide limits, will constant period, irrespective variations load, fric­ tional losses and other factors which all ordinary engines produce change the rate 20 reciprocation. In carrying out invention and for secur- 70 ing the objects general terms stated above, I employ the energy steam gas under pressure, acting through proper mechanism, to maintain oscillation piston, and, tak­ ing advantage the law above stated, con- 75 nect with said piston, cause act upon it, a spring, under such conditions auto­ matically regulate the period the vibra­ tion, that the alternate impulses the power impelled piston, and the natural vibra- 80 tions the spring shall always correspond in direction and*coincide time. Moreover, instead of permitting the piston impinge directly upon such cushions within its own cylinder, I prefer, order avoid the influence the varying pressure the steam gas that acts 95 upon the piston and which might disturb the relations necessary for the maintenance of isochronous vibration, and also better util­ ize the heat generated the compression, to employ independent plunger connected 100 with the main piston, and chamber cyl­ inder therefor, containing air which nor­ mally, the same pressure the external atmosphere, for thus spring practically