Hazardous-rated exit sign and floodlights

1. An exit sign ( 10 ) comprising:

an explosion-proof housing ( 12 ), said housing comprising a first chamber ( 44 ) and a second chamber ( 46 ) within the housing separated by a divider wall ( 46 );

a front cover ( 14 ) attached to said housing and defining an interface between said housing and said front cover, said interface defining a vent path for gases within said housing to exit said housing, and said front cover and said housing defining a heat sink for cooling said gases exiting said housing through said vent path;

a bottom plate ( 34 ) attached to said housing and defining an interface between said housing and said bottom plate, said interface defining a vent path for gases within said housing to exit said housing, and said bottom plate and said housing defining a heat sink for cooling said gases exiting said housing through said vent path;

a window ( 35 ), disposed in said bottom plate, containing a clear glass or plastic window pane ( 37 ) and located proximate to said first chamber of said housing,

wherein a volume of said first chamber, a housing wall thickness surrounding said first chamber, a divider wall thickness, and a window pane thickness are arranged and designed according town expected internal explosion pressure within said first chamber;

wherein a volume of said second chamber, a housing wall thickness surrounding said second chamber, and a divider wall thickness are arranged and designed according to an expected internal explosion pressure within said second chamber;

a generally planar sign panel ( 16 ) having a first edge which is coupled to said housing at said window;

an indicium ( 22 ) disposed on said sign panel;

a plurality of light emitting diodes ( 32 ) disposed within said second chamber of said housing and directed to shine light through said window into said sign panel; and

at least one floodlight ( 17 , 18 ) comprising one or more light emitting diodes ( 60 ) directed to illuminate a region in proximity with said exit sign.

2. The exit sign of claim 1 , said floodlight ( 17 , 18 ) comprising:

a bowl-shaped light fixture ( 62 ) on which said one or more light emitting diodes ( 60 ) are disposed, said light fixture disposed within an explosion-proof housing ( 52 ); and

a socket ( 70 ) having a bowl-like depression, and disposed within said housing, said bowl-shaped light fixture arranged and designed to correspond with the bowl-like depression of said socket,

wherein said bowl-shaped light fixture is adjustable and moves relative to said socket to adjust a direction of lighting from said one or more light emitting diodes.

3. The exit sign of claim 2 , said floodlight ( 17 , 18 ) further comprising a hollow screw ( 72 ) extending from said bowl-shaped light fixture through a groove ( 68 ) formed in said socket.

4. The exit sign of claim 1 , further comprising one or more rechargeable batteries disposed within said housing ( 12 ) and operatively coupled to said one or more light emitting diodes ( 60 ) of the floodlight ( 17 , 18 ).

5. The exit sign of claim 1 , further comprising a rechargeable battery ( 25 ) disposed within said housing ( 12 ) and operatively coupled to said one or more light emitting diodes ( 32 ) directed to shine light through said window and into said sign panel.

6. The exit sign of claim 1 , wherein said floodlight ( 18 ) is attached to said housing by way of a cylindrical stem ( 54 ) having a swivel ( 56 ), wherein said swivel is arranged and designed to allow said floodlight to rotate 360 degrees.

7. The exit sign of claim 1 , said floodlight ( 17 , 18 ) further comprising a light cover ( 64 ) of a transparent or translucent material through which light from said light emitting diodes shines.

8. The exit sign of claim 1 , wherein said floodlight ( 17 ) is remotely located from said housing of said exit sign.

9. The exit sign of claim 1 , wherein an expected internal explosion pressure within said first chamber is between approximately 200 psi and 700 psi.

10. The exit sign of claim 1 , wherein an expected internal explosion pressure within said second chamber is between approximately 400 psi and 900 psi.

11. An exit sign ( 10 ) comprising:

an explosion-proof housing ( 12 ), said housing comprising a first chamber ( 44 ) and a second chamber ( 46 ) within the housing separated by a divider wall ( 46 );

a front cover ( 14 ) attached to said housing and defining an interface between said housing and said front cover, said interface defining a vent path for gases within said housing to exit said housing, and said front cover and said housing defining a heat sink for cooling said gases exiting said housing through said vent path;

a bottom plate ( 34 ) attached to said housing and defining an interface between said housing and said bottom plate, said interface defining a vent path for gases within said housing to exit said housing, and said bottom plate and said housing defining a heat sink for cooling said gases exiting said housing through said vent path;

a window ( 35 ) disposed in said bottom plate containing a clear glass or plastic window pane ( 37 ) and located proximate to said first chamber of said housing;

a generally planar sign panel ( 16 ) having a first edge which is coupled to said housing at said window;

an indicium ( 22 ) disposed on said sign panel;

a plurality of light emitting diodes ( 32 ) disposed within said second chamber of said housing and directed to shine light through said window into said sign panel;

at least one floodlight ( 17 , 18 ) arranged and designed to illuminate an area, said floodlight comprising:

a light source ( 60 ) disposed on a bowl-shaped light fixture ( 62 ), said light fixture disposed within an explosion-proof housing ( 52 ); and

a socket ( 70 ) having a bowl-like depression, and disposed within said housing, said bowl-shaped light fixture arranged and designed to correspond with a bowl-like depression of said socket,

wherein said bowl-shaped light fixture is adjustable and moves relative to said socket to adjust a direction of lighting from said one or more light emitting diodes;

one or more rechargeable batteries disposed within said housing and operatively coupled to said light emitting diodes ( 32 ) and ( 60 ).

12. The exit sign of claim 11 , wherein said floodlight ( 18 ) is coupled to said housing by a stem ( 54 ) comprising a swivel ( 56 ), wherein said swivel is arranged and designed to allow said floodlight to rotate 360 degrees.

13. The exit sign of claim 11 , wherein a volume of said first chamber, a housing wall thickness surrounding said first chamber, a divider wall thickness, and a window pane thickness are arranged and designed according to an expected internal explosion pressure within said first chamber.

14. The exit sign of claim 13 , wherein an expected internal explosion pressure within said first chamber is between approximately 200 psi and 700 psi.

15. The exit sign of claim 11 , wherein a volume of said second chamber, a housing wall thickness surrounding said second chamber, and a divider wall thickness are arranged and designed according to an expected internal explosion pressure within said second chamber.

16. The exit sign of claim 15 , wherein an expected internal explosion pressure within said second chamber is between approximately 400 psi and 900 psi.

17. The exit sign of claim 11 , said floodlight ( 17 , 18 ) further comprising a hollow screw ( 72 ) extending from said light fixture through a groove ( 68 ) formed in said socket.

18. The exit sign of claim 11 , said floodlight ( 17 , 18 ) further comprising a light cover ( 64 ) of a transparent or translucent material through which light from said light emitting diodes shines.

19. The exit sign of claim 11 , wherein said floodlight ( 17 ) is remotely located from said housing of said exit sign.