Electric heating – Metal heating – Of cylinders
Patent
1990-11-05
1992-08-25
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1051, 219 1067, 219 1075, 392478, H05B 610
Patent
active
051421151
ABSTRACT:
An apparatus for heating a fluid contained in an electrically conductive material container. The apparatus includes a stepdown transformer having a primary winding coupled to source of electric energy and a secondary winding that includes the container itself. In a first embodiment the secondary winding also comprises a substantially rigid electrically conductive member on which the transformer is mounted and electrical contacts at each end of the conductive member for connecting it with the container. In a second embodiment, two semicircular clamps, having articulated jaws, carry the current from the transformer. Such clamps are made to close around the upper and lower portion of the walls of a cylindrical can, completing a secondary winding in which a very high current flows in the walls of the container. In all cases the turns ratio of the transformer is sufficient to reduce the voltage in the secondary winding to a safe level. Illustratively, the turns ratio is at least 100 to 1. Advantageously, the primary winding is connected in series to a thermal cutoff switch which contacts the container. The cutoff temperature of the switch is chosen to cut off power to the transformer before the container becomes too hot. Additionally, the primary winding is also connected serially to a contact switch mounted below the container which closes only when the container is present. Although it is advantageous to use a non-ferromagnetic container such as an aluminum can, this invention can also be practiced utilizing any thin-walled ferromagnetic container.
REFERENCES:
patent: 495071 (1893-04-01), Thomson
patent: 1273666 (1918-07-01), Powers
patent: 1646599 (1927-10-01), Schaefer
patent: 1674334 (1928-06-01), Jones
patent: 2066668 (1937-01-01), Bennett
patent: 2381866 (1945-08-01), Crosby
patent: 3354292 (1967-11-01), Kahn
patent: 3398262 (1968-08-01), Kahn
patent: 3423570 (1969-01-01), Trabilcy
patent: 3435170 (1969-03-01), Smith
patent: 3524966 (1970-08-01), Ando
patent: 3665154 (1972-05-01), Ando
patent: 3755650 (1973-08-01), Ando
patent: 3777117 (1973-12-01), Othmer
patent: 3968346 (1976-07-01), Cooksley
patent: 3975617 (1976-08-01), Othmer
patent: 3983360 (1976-09-01), Offermann
patent: 4214150 (1980-07-01), Cunningham
patent: 4456807 (1984-06-01), Ogino et al.
patent: 4527031 (1985-07-01), Aparicio
patent: 4560849 (1985-12-01), Migliori et al.
Gear, "Standard Handbook for Electrical Engineers", Fifth Edition, McGraw-Hill Book Company, Section 22-94, pp. 1708-1709, Sep. 1922.
Froehle Joan C.
Weidman Charles R.
Kilo Alpha Co.
Leung Philip H.
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