Special Features:

Original name pcb/sw assembly, trackball (printed circuit board, switch assembly, trackball)

Properties:

Two or more complete switches mounted on each other or having a common mounting the major function of which is to hold the switches. Each switch, as a separable item, must be capable of functioning in accordance with its own name. Excludes items consisting of individually separable switches which are physically interlocked (e.G., one button returns when the other is pushed), which have a common actuator, or are electrically connected. See also switch, push.