Push button assembly
AssigneeEaton Corporation
InventorRoy L. Hart
Life of this patent
Estimating the term…
Abstract
An improved push button assembly having solid state light sources may be utilized to replace push button assemblies having incandescent light sources in previously installed switch assemblies or may be used in original equipment. The push button assembly includes a base which at least partially encloses a printed circuit. A plurality of solid state light sources are connected with the printed circuit. A display is illuminated by light from the solid state light sources. One or more electrical circuit components, which emit heat, are connected with the printed circuit. A metal heat sink is disposed adjacent to the electrical circuit components. The metal heat sink engages a metal housing which encloses a display which is illuminated by light from the solid state light sources.
Claims39
A push button assembly for use with switch contacts which are movable between an actuated condition and an unactuated condition, said push button assembly comprising a base formed of an electrically insulating material, a printed circuit at least partially enclosed by said base, a plurality of solid state light sources connected with said printed circuit, said solid state light sources being energizable to emit light, a display which is illuminated by light from said solid state light sources when said solid state light sources are energized, a metal housing which partially encloses said display, a plurality of electrical circuit components which are connected with said printed circuit and which emit heat, and a metal heat sink disposed adjacent to said electrical circuit components to conduct heat away from said electrical circuit components, said metal heat sink being disposed in engagement with said metal housing to enable heat to be conducted from said metal heat sink to said metal housing.
A push button assembly for use with switch contacts which are movable between an actuated condition and an unactuated condition, said push button assembly comprising a base, said base having a plurality of side walls, said plurality of side walls include first and second side walls, a printed circuit, said printed circuit includes a first portion which extends along said first side wall of said base, a second portion which extends along said-second side wall of said base and a third portion which extends between said first and second portions of said printed circuit, a plurality of solid state light sources connected said printed circuit, said solid state light sources being energizable to emit light, a first electrical circuit component which is connected with said printed circuit and is disposed between said first portion of said printed circuit and said first side wall of said base, a second electrical circuit component which is connected with said printed circuit and is disposed between said second portion of said printed circuit and said second side wall of said base, a first metal heat sink disposed between said first electrical circuit component and said first side wall of said base, and a second metal heat sink disposed between said second electrical circuit component and said second side wall of said base.
A push button assembly for use with switch contacts which are movable between an actuated condition and an unactuated condition, said push button assembly comprising a base, said base having a plurality of side walls which extend from a bottom wall, a printed circuit which is at least partially enclosed by said base, said printed circuit having a first surface which faces toward said bottom wall of said base and a second surface which faces away from said bottom wall of said base, an electrical circuit component which is connected with said printed circuit and which emits heat, said electrical circuit component being disposed adjacent to said second side of said printed circuit, a plurality of solid state light sources connected with said printed circuit, said solid state light sources being energizable to emit light, and a metal heat sink disposed between said plurality of solid state light sources and said electrical circuit component.
A push button assembly for use with switch contacts which are movable between an actuated condition and an unactuated condition, said push button assembly comprising a base formed of an electrically insulating material, said base having a bottom wall and a plurality of side walls which extend from said bottom wall and cooperate with said bottom wall to at least partially form a recess, a plurality of electrically conductive terminals connected with said bottom wall of said base, an electrical circuit component which emits heat and is disposed in said recess, said electrical circuit component being connected with at least one of said terminals to enable electrical energy to be conducted between at least one of said terminals and said electrical circuit component, a metal heat sink at least partially disposed in said recess, said electrical circuit component being disposed between said heat sink and said bottom wall of said base, said heat sink includes a metal plate portion which extends between first and second side walls of said plurality of side walls of said base, said heat sink includes a first plurality of metal projections which extend through said first side wall of said base and a second plurality of metal projections which extend through said second side wall of said base, a light source board which is disposed in said recess in said base, said heat sink being disposed between said light source board and said electrical circuit component, said light source board having an inner side which extends generally parallel to and faces toward said plate portion of said heat sink and an outer side which faces away from said heat sink, a plurality of solid state light sources connected with said light source board, said solid state light sources being energizable to emit light, a plurality of electrical conductors connected with said electrical circuit component and said solid state light sources to conduct electrical energy when said solid state light sources are energized to emit light, a display which is illuminated by light from said solid state light sources when said solid state light sources are energized, and a metal housing which partially encloses said display, said first and second pluralities of metal projections being disposed in engagement with said metal housing to enable heat to be conducted from said heat sink to said metal housing.
Dependencies are inferred from the claim text.