Nikola Tesla U.S. Patent 1,119,732 - Apparatus for Transmitting Electrical Energy Patent Wrapper Page 33

ODELILILJELIL 13 C3 C300GDCJUJ Fig. 1 is a sectional view of a terminal and the upper portion of its support in a form which is generally typical of the invention. Figs. 2, 3 and 4 are sectional views of devices modi - fied in details, but adapted to carrying out the principle of the invention, and Fig. 5 is a view in elevation and part section of an improved terminal of large surface with supporting structure and generating apparatus. Referring to Fig. 1, a designates a hood or shell of con ducting material of spherical form with an opening on the lower side, and b an in sulating support which passes up through this opening and fits into a metallic socket gsecured to the inner surface of the shell. A conductor , which conveys the charge to the terminal, is led up into through the shell the same opening and connected to its inner or under side. Obviously the shell need not be entirely of metal, the only requirement being that its surface be conducting, and that the conductor c be connected to it on the inner side or, generally speaking, at à point of very low electrical density. In supporting the shell a in this manner, the leakage of the charge through the post b is prevented, while the large curvature of the outer surface which should be smooth and, if possible, polished, prevents the escape into the air and allows a large quantity of el ectricity to be accumulated on the terminal, notwithstanding its small capacity. The wire c should be heavily insulated and prete rably kept away from the insulating support b. 33 3 371کے 729