Gyrostat, Gyroscope Testing Device for Rockets, 1929

25 inch bicycle wheel, with wooden rim and no tire, attached to a wood frame; with switches and electric coil; steel disc, 22in. in diameter, attached to wheel; frame consisting of 7 pieces of wood, each stick 1 x 1.25in., bolted to disc and set at equi-distances from each other except for two sticks which are connected to a wood board, 16 x 6.25in. and 0.75in. thick; a 0.75in. steel plumbing pipe, threaded at both ends, is bent around three of the sticks and secured to the sticks by wires through holes; on the board is clamped a cylinder with black insulated electrical wires and rods leading it; mostly the rods protrude from the back of the cylinder and also lead to spring devices; at the front end of the cylinder is screwed a small AC spark plug, with an open pipe protruding from under the plug; some of the wires leading from the cylinder are attached to a rheostat type electrical switch mounted on one of the pieces of adjoining wood; two of the parts of the mechanism on the cylinder appear to be made of lids from old tobacco or chewing tobacco cans and have the words, "Satisfaction Guaranteed - Will Not Bite Your Tongue" stamped on them.