An electrical, multi-push button switch assembly comprising:
- a. a housing defining a cavity with a wall between the cavity and a front surface, the wall having a plurality of openings therethrough;
- b. a resilient pad having integral button portions corresponding in size and relative position with the openings in the wall of said housing protruding from one side thereof, said pad being positioned in the cavity of said housing in parallel, juxtaposition with said wall with the button portions protruding through the openings;
- c. a sheet of electrically insulating material having openings therethrough corresponding in relative position with the button portions and positioned generally in overlying relationship to said resilient pad opposite the wall of said housing;
- d. conductive means sandwiched between said resilient pad and said insulating sheet;
- e. a first printed circuit board positioned in overlying relationship to said insulating sheet and having a plurality of contact areas on one side thereof corresponding in position with the openings in said insulating sheet, said contact areas being electrically connected to electrical terminals on the opposite side of said first printed circuit board and further being constructed to complete a circuit between a predetermined pair of the terminals upon depressing one of said button portions of said resilient pad to force said conductive means thereagainst;
- f. a connecting link formed of a spacer of electrically insulating material having areas of elastomeric material extending between the sides thereof, said spacer being positioned in overlying relationship to said printed circuit board with one of said areas of elastomeric material being in juxtaposition to one each of the electrical terminals thereon, said elastomeric material having conductive particles distributed therethrough to form an electrically conductive path from one side of said connecting link to the other when the elastomeric material therein is compressed;
- g. a second printed circuit board having components mounted on one side thereof and a plurality of terminals in electrical connection with the components on the opposite side thereof, said second printed circuit board being positioned in overlying relationship to said connecting link with the terminals thereon positioned in juxtaposition to predetermined ones of the elastomeric areas therein;
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- h. mounting means positioned in contact with said second printed circuit board and engaged with said housing for compressing the assembly together until electrical connections are made between the terminals on the first and the second printed circuit boards through the elastomeric areas in the connecting link.