Abstract: The ceramic cooking container fabricating method of the invention includes the steps of: (a) material preparation to prepare material from clay; (b) shape pressing to prepare a green cooking container and a green annular supporting cushion from the material thus obtained and to cover the green cooking container with a layer of glaze; and (c) firing to make an annular groove on the bottom side of the green cooking container, then to put the green annular supporting cushion and the green cooking container on the silicon carbide plate in a kiln, permitting the annular groove of the green cooking container to be supported on the green annular cushion, and then to fire the green cooking container and the green annular supporting cushion at about 135.degree. C. for a predetermined length of time, and then to fasten electrically conductive annular membranes to the bottom side of the cooking container so as to obtain a finished ceramic cooking container.

Abstract: The present invention relates to an umbrella rod structure having multiple tubes. The rod comprises at least two tubes, such as an outer tube and an inner tube, which have arched grooves and positioning holes, and a V-shaped stopper having a projection on one end disposed in the inner tube to extend from positioning holes of both tubes. The arched contacts between the grooves of both tubes and the engagement of the projection and the positioning holes make the rod be secure and firm when it is stretched while the structure of the invention is simple and the manufacturing and assembling is easy and convenience.