Wall box dimming system and face plate and switch assembly therefor

• US 4,893,062 A
• Filed: 04/21/1987
• Issued: 01/09/1990
• Est. Priority Date: 04/21/1987
• Status: Expired due to Term

• Current Assignee: Lutron Technology Company LLC
• Original Assignee: Lutron Electronics Company Incorporated (Lutron Electronics)
• Inventors: Spira, Joel S., D'Aleo, Michael J.
• Primary Examiner(s): Boudreau, Leo H.
• Assistant Examiner(s): Razavi, Michael
• Application Number:
  US07/040,646
• Time in Patent Office: 994 Days
• Field of Search: 315/295, 315/291, 315/208, 315/290, 315/294, 315/297, 315/DIG. 4, 315/DIG. 9, 315/DIG. 7, 362/125, 362/136, 362/374
• US Class Current: 315/291
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

A wall box dimming system assembly controls the intensity level of a plurality of groups of lights in accordance with a plurality of preset scenes. The electronics for carrying out the dimmer operations are preferably mounted in a housing adapted to fit in a standard four gang wall box. A face plate assembly is coupled to the housing and has a larger profile than the housing as viewed from an entry position located in front of the face plate assembly. At least some of the control switches which enable the operator to switch control over the dimming levels from scene to scene and/or turn the system off are located outside of the profile of the wall box housing. The face plate assembly includes a support plate and a window pivotally connected to the support plate and moveable between a closed position, wherein access to slide potentiometers which control the dimming levels of the lights is blocked, and an open position, wherein the operator can gain access to the slide potentiometers. A novel hinge structure maintains the window in the open position once the window has been moved into this position by the operator of the dimmer so that the operator can adjust the positions of the slide potentiometers without having to hold the window in the open position.

Claims

1. A dimming system assembly for controlling the intensity of m groups of lights, m being an integer, each group including one or more lights, said dimming system assembly comprising:

(A) an electronics module having dimmer electronics located therein for controlling the lighting level of said m groups of lights in accordance with a selected one of n preset scenes, n being an integer greater than 1, said dimmer electronics including;

(1) n groups of m slide potentiometers, each slide potentiometer of a given group controlling the intensity of a respective group of lights; and

(2) n switch means, each switch means being associated with a different said group of slide potentiometers for causing the intensity of said groups of lights to be determined by that group of slide potentiometers associated with the respective switch means; and

(B) a face plate assembly coupled to said electronics module, said face plate assembly comprising;

(1) a support plate having m×

n slots formed therein, each of said slide potentiometers including slide arms extending into a respective said slot;

said support plate including a coupling section having a cam surface and a locking surface which intersect at a ridge;

said support plate also having at least one opening through which said switch means extend;

(2) a window pivotally coupled to said coupling section of said support plate by a pin and being pivotable about an axis of said pin between a closed position, wherein said window covers said slots and said slide arms of said potentiometers, and an open position, wherein said window exposes said slots and said slide arms of said potentiometers so that the position of said slide arms of said potentiometers may be adjusted by the operator of said dimming system assembly;

an inner surface of said window sliding along said cam surface as said window moves from said closed position to said open position until it reaches said ridge and then contacting said locking surface after it moves past said ridge; and

(3) said coupling section, said window and said pin cooperating to cause said inner surface to be biased radially inward toward said axis of said pin in such a manner that said inner surface is first biased into contact with said cam surface and then is biased into locking engagement with said locking surface as said window is moved from said closed to said open position.

2. The dimming system assembly of claim 1, wherein said coupling section, said window and said pin cooperate to cause said inner surface to be biased against said cam surface with a continually increasing force as said window is moved from said closed to said open position.

3. The dimming system assembly of claim 2, wherein the distance from said axis of said pin to said cam surface varies.

4. The dimming system assembly of claim 3, wherein the distance from said axis of said pin to said cam surface increases as said window moves from said closed to said open position.

5. The dimming system assembly of claim 4, wherein said cam surface is formed along an imaginary cylinder whose central axis is parallel to but spaced from said axis of said pin.

6. The dimming system assembly of claim 1, wherein said cam surface is formed along an imaginary cylinder whose central axis is parallel to but spaced from said axis of said pin.

7. The dimming system assembly of claim 1, wherein said pin and said window are formed of flexible materials.

8. The dimming system assembly of claim 7, wherein said pin is formed of spring steel.

9. The dimming system assembly of claim 8, wherein said window is formed of a plastic material.

10. The dimming system assembly of claim 7, wherein said window is formed of a plastic material.

11. The dimming system assembly of claim 1, wherein said window covers approximately the top half of said support plate when it is in said closed position and wherein approximately the bottom half of said support plate is covered by a switch plate having openings therein through which said switch means may extend.

12. The dimming system assembly of claim 11, wherein said window and said switch plate fully encompass front and side surfaces of said support plate when said window is in said closed position.

13. The dimming system assembly of claim 12, wherein said window and switch plate appear to be a substantially continuous member when said window is in said closed position.

14. The dimming system assembly of claim 1, wherein said electronics module includes:

a planar metallic yoke through which said slide arms of said potentiometers extend;

a housing coupled to one side of said yoke and housing said slide potentiometer and other elements of said dimmer electronics; and

a switch assembly coupled to the opposite side of said yoke and housing said switch means.

15. The dimming system assembly of claim 14, wherein said switch assembly further includes a master Off switch which also extends through said switch plate.

16. The dimming system assembly of claim 15, wherein at least one of said switch means and said master Off switch is located at a position below the lower most edge of said housing.

17. The dimming system assembly of claim 15, wherein said switch assembly includes a respective indicator light associated with each of said switch means and a separate indicator light associated with said master Off switch, the relative location of each of said switch means and its associated indicator light being different than the relative location of said master Off switch and its associated indicator light.

18. A wall box dimmer, comprising:

dimmer control means for enabling an operator of said dimmer to enter information regarding n desired intensity levels for each of m groups of lights, n being an integer greater than 1;

scene control means for enabling an operator of said dimmer to enter information concerning which respective one of said n intensity levels each of said m groups of lights should be operated at;

dimmer electronics for controlling the intensity of said lights in accordance with information entered into said dimmer control means and said scene control means, said dimmer electronics being located in a wall box housing; and

a face plate assembly coupled to said housing, said dimmer control means and said scene control means being accessible to an operator of said dimmer from an entry position located in front of said face plate assembly, said face plate assembly having an outer profile as viewed from said entry position which is larger than, but which fully encompasses, an outer profile of said housing as viewed from said entry position;

at least a portion of said dimmer control means and/or said scene control means being located at a position outside of said outer profile of said housing.

19. The wall box dimmer of claim 18, further including a window moveable between a closed position wherein it prevents an operator of said dimmer from accessing said dimmer control means and an open position where it permits an operator of said dimmer to access said dimmer control means.

20. The wall box dimmer of claim 18, wherein said dimmer control means is located in an area which is fully encompassed by said outer profile of said housing.

21. The wall box dimmer of claim 20, wherein said scene control means includes a plurality of human actuable means, each of said human actuable means being associated with a respective one of said intensity levels for each of said groups of lights, at least one of said human actuable means being located at a position outside of said outer profile of said housing.

22. The wall box dimmer of claim 21, wherein at least one of said human actuable means is located at a position within said outer profile of said housing.

23. The wall box dimmer of claim 19, wherein said dimmer control means is located in an area which is fully encompassed by said outer profile of said housing.

24. The wall box dimmer of claim 23, wherein said scene control means includes a plurality of human actuable means, each of said human actuable means being associated with a different one of said intensity levels for each of said groups of lights, at least one of said human actuable means being located at a position outside of said outer profile of said housing.

25. The wall box dimmer of claim 24, wherein at least one of said human actuable means is located at a position within said outer profile of said housing.

26. The wall box dimmer of claim 18, further including a front plate enclosing an open end of said housing, said front plate having an outer profile which is approximately identical to the outer profile of said face plate assembly as viewed from said entry position and wherein said face plate covers the front and side surfaces of said front plate.

27. The wall box dimmer of claim 26, wherein said scene control means includes n scene control switches which form part of a switch assembly, said switch assembly being coupled to said front plate and being housed between said front plate and said face plate assembly, said switches being accessible from said entry position.

28. The wall box dimmer of claim 27, wherein said switch assembly comprises:

a cradle;

a circuit board located in said cradle, said circuit board having n microswitches mounted thereon; and

n push buttons, each said push button cooperating with a respective said microswitch to define one of said scene control switches, each push button extending through said cradle and said face plate assembly so as to enable an operator of said wall box dimmer to depress said push buttons and thereby actuate said microswitches.

29. The wall box dimmer of claim 28, wherein said switch assembly further includes n scene indicator lights, each of said scene indicator lights being associated with a respective said scene control switch and extending through both an opening in said cradle and an opening in said face plate assembly.

30. The wall box dimmer of claim 28, wherein each of said push buttons includes a base and an elongated tongue extending therefrom, said base of each of said push buttons being received in a respective recess formed in said cradle.

31. The wall box dimmer of claim 30, wherein each of said push buttons further includes a dimple extending from said base in a direction opposite to said tongue, said dimple abutting an actuating means of said microswitch associated with that push button.

32. The wall box dimmer of claim 28, wherein said switch assembly further includes a master Off microswitch and a master Off push button associated therewith and extending through said front wall of said cradle and wherein said wall box dimmer further includes a master Off light indicator whose position relative to said Off push button is different than the position of said scene indicator lamps relative to said scene control switches.

33. A switch assembly, comprising:

a cradle having n openings formed in a front wall thereof, n being an integer greater than 1;

a circuit board housed in said cradle; and

n switch means mounted on said circuit board, each of said switch means including an associated actuating member, each actuating member extending through a respective one of said openings in said front wall of said cradle.

34. The switch assembly of claim 33, wherein said actuating members are push buttons having a planar base section and an elongated tongue section extending perpendicular thereto, each said push button being associated with a respective opening, said tongue section of each said push button extending through its associated opening, said base section of each of said push buttons being received in a respective recess formed in said front wall of said cradle surrounding its associated said opening, each recess being larger than its associated base sections such that each base section is fully housed in its associated recess.

35. The switch assembly of claim 34, wherein each of said switch means includes a microswitch mounted on said circuit board and having a spring biased actuating pad associated therewith, each of said push buttons having a dimple extending from said base section in the opposite direction of said tongue section and contacting said actuating pad of its associated microswitch.

36. The switch assembly of claim 33, wherein said front wall and said circuit board are planar and said cradle includes a plurality of ledges which support said circuit board in a plane parallel to and spaced from said front wall.

37. The switch assembly of claim 36, wherein said ledges are integral with said cradle.

38. The switch assembly of claim 33, further including:

p lamps mounted on said circuit board, p being an integer greater than 1 and equal to or less than n, each of said lamps being associated with a respective one of said switch means and being located adjacent its associated switch means; and

p additional openings formed in said front wall of said cradle, each of said lamps extending through an associated said additional opening.

39. The switch assembly of claim 33, wherein said cradle has an open back through which said circuit board may be inserted during assembly, said open back being closed by a cradle cover.

40. The switch assembly of claim 39, wherein said cradle has a plurality of bosses extending therefrom, each of said bosses extending into an associated opening formed in said cradle cover to align said cradle cover relative to said cradle.

41. The switch assembly of claim 40, wherein said bosses are melted into the associated openings in said cradle cover to affix said cradle cover to said cradle.