Abstract: An electric coil is printed onto a flexible sheet so that it can be bent into any desired shape to create a complex magnetic field. A flexible parallelogram substrate, having a two-coil pattern printed thereon, can be bent into a cylinder so that the coil pattern at the ends of the cylinder generate an axial magnetic field while the remainder of the coil pattern on the cylinder can generate a transverse field varying continuously through 90.degree..

Abstract: Electronic arrangement for detecting and identifying individual balls in a table ball game involves the use of two or more distinct code elements embedded in the balls. When applied to a pool table, the balls landing in the pockets are conveyed by inclined ducts to an electronic detector coupled to a scoring device. The detector recognizes the resonant frequency of each code element and compares the codes detected with the combination of codes assigned to the different balls. The application of the invention to Kelly Pool and Poker Pool is described.