1. A binary code generator for generating a plural bit binary code, comprising a circuit board, a plurality of electrical terminals on said circuit board, one of said terminals being adapted to be connected to a voltage source, a plurality of conductive lead groupings on said circuit board, each grouping comprising a plurality of closely spaced interlaced lead patterns, one of said lead patterns being operatively electrically connected to said one electrical terminal, others of said lead patterns being connected to a selected one or more of said other terminals in accordance with a binary code, and switch means associated with each lead grouping adapted when actuated to provide operative electrical engagement between said plurality of lead patterns in said lead grouping, thereby to electrically connect said selected one or more terminals to said voltage source, wherein said switch means comprises a movable electrical contact adapted when said switch means is actuated to move into electrical engagement with said conductive lead grouping, wherein said switch means is a pushbutton switch comprising a depressible pushbutton member manually engageable on one side, said contact member being secured to its other side facing and normally spaced from said conductive lead grouping on said circuit board and having a contact surface movable into engagement with the lead patterns of said conductive lead grouping when said pushbutton is depressed, and wherein said conductive lead patterns each include a plurality Of radially extending branches, and wherein said contact surface is defined by a substantially circular rim extending in a direction toward said circuit board, said circular rim being adapted to conductively bridge all of said radially extending branches when said pushbutton member is depressed.

2. A binary code generator for generating a plural bit binary code, comprising a circuit board, a plurality of electrical terminals on said circuit board, one of said terminals being adapted to be connected to a voltage source, a plurality of conductive lead groupings on said circuit board, each grouping comprising a plurality of closely spaced interlaced lead patterns, one of said lead patterns being operatively electrically connected to said one electrical terminal, others of said lead patterns being connected to a selected one or more of said other terminals in accordance with a binary code, and switch means associated with each lead grouping adapted when actuated to provide operative electrical engagement between said plurality of lead patterns in said lead grouping, thereby to electrically connect said selected one or more terminals to said voltage source, wherein said switch means comprises a movable electrical contact adapted when said switch means is actuated to move into electrical engagement with said conductive lead grouping, wherein said switch means is a pushbutton switch comprising a depressible push-button member manually engageable on one side, said contact member being secured to its other side facing and normally spaced from said conductive lead grouping on said circuit board and having a contact surface movable into engagement with the lead patterns of said conductive lead grouping when said pushbutton member is depressed, wherein said depressible pushbutton members are all formed integrally on a single sheet of resilient insulating material, and means securing said sheet of resilient insulating material to said circuit board with said pushbutton members spaced and said contacts spaced from said circuit board, and wherein said conductive lead patterns each include a plurality of radially extending branches, and wherein said contact surface is defined by a substantially circular rim extending in a direction toward said circuit board, said circular rim being adapted to conductively bridge all of said radially extending branches when said pushbutton member is depressed.