Abstract: A non-light emitting protecting device is adapted to be used with a string of lamp sockets that connect electrically a plurality of lamps in series. The protecting device includes a shell, and a conductor circuit encapsulated by the shell. The shell has a size and shape corresponding to the lamps so as to be adapted to be mounted in any one of the lamp sockets. The conductor circuit has two terminals, and a rated circuit connected between the terminals. Each of the terminals has a free end that extends outwardly of the shell and that is adapted to be connected in series with the lamps when the shell is mounted in one of the lamp sockets. The rated circuit is capable of breaking electrical connection between the terminals when current flowing therethrough exceeds a predetermined rated current.

Abstract: A battery-powered toilet training device has been developed using the state-of-art electronic devices to provide improved training of toddlers in orderly habits of discharging urine and stool as well. A non-contact electronic sensor is used to detect the presence of urine and stool in the receptacle. A battery-powered toy is used to produce an audible signal and a mechanical motion to reward the toddler and to signal the trainer when the toddler's elimination begins.