Snap fastener

Claim 1

IN COMBINATION: (A) A SUPPORT PROVIDED WITH AN APERTURE THEREIN, (B) AN ELECTRICAL DEVICE AND A PLATE SEPARATE THEREFROM ADAPTED TO BE SUPPORTED ON SAID SUPPORT, (C) A SINGLE MEANS FOR MOUNTING BOTH SAID DEVICE AND SAID PLATE IN ASSEMBLED RELATIONSHIP ON SAID WALL WITH THE PLATE PARALLELING SAME AND COVERING THE APERTURE IN THE WALL, (D) SAID SINGLE MEANS COMPRISING A SPRING CLIP HAVING A BASE AND OPPOSED WALLS FORMING A SUBSTANTIALLY U-SHAPED POCKET, ARMS FORMED INTEGRAL WITH ENDS OF THE LEGS OF SAID OPPOSED WALLS BENT IN THE DIRECTION OF THE BASE OF SAID POCKET AND A FINGER FORMED INTEGRAL WITH EACH OPPOSED POCKET WALL EXTENDING OUTWARDLY OF SAID BASE BEYOND SAID POCKET, (E) SAID OPPOSED POCKET WALLS, SAID ARMS AND SAID FINGERS HAVING A NORMAL BIASING ACTION, (F) SAID ELECTRICAL DEVICE BEING WEDGED BETWEEN THE OPPOSED WALLS OF SAID CLIP AND CLAMPED THEREBY WITHIN SAID POCKET, (G) THE WEDGING OF SAID DEVICE INTO SAID POCKET SHIFTING OPPOSED WALLS THEREOF AWAY FROM ONE ANOTHER TO INCREASE THE BIASING ACTION OF SAID ARMS IN OPPOSITE DIRECTIONS AND TO INCREASE THE BIASING ACTION OF SAID FINGERS IN A DIRECTION TOWARD EACH OTHER, (H) SAID ARMS BEING SPRUNG INTO THE APERTURE IN SAID SUPPORT WITH THEIR ENDS INTERLOCKED TO OPPOSED EDGES OF THE APERTURE FOR SECURING SAID DEVICE TO THE SUPPORT, AND (I) OPPOSED PORTIONS ON SAID PLATE SPREADING SAID FINGERS APART AS THE PLATE IS BROUGHT INTO ENGAGEMENT THEREWITH FOR SNAPPING THE FINGERS THEREOVER TO SECURE SAID PLATE AGAINST SAID SUPPORT.