Abstract: A system of remotely actuated novelty devices is disclosed having triggering and actuating components packaged in separate, interchangeable modules. The system includes several interchangeable trigger modules, each of which detects the occurrence of an activating event and in response generates a trigger signal of finite duration, and several interchangeable action modules, each of which performs a prank in response to a trigger signal. Each action module includes a battery that powers the action module and any trigger module connected to it.

Abstract: This invention is an input device, or stylus, for entering hand drawn forms into a computer comprising a writing instrument, a pressure switch for determining whether the instrument is in contact with the writing surface, an acoustic transmitter for triangulating the position of the stylus on the surface, and a wireless transmitter for transmitting data and timing information to the computer. In operation, the stylus transmits an infra red signal which the system receives immediately, and an ultra sound pulse which two microphones receive after a delay which is a function of the speed of sound and the distance of the stylus from each microphone. From this information the system can calculate the position of the stylus. Switches for indicating functions are mounted on the stylus. Multiple stylusses can be used, each transmitting a distinctive identification code so that the system can determine which stylus is the signal source.