Tracking reflector assembly having means for accurately synchronizing the movement thereof and for providing quick access to system switches for inspection and repair

• US 5,517,358 A
• Filed: 09/12/1994
• Issued: 05/14/1996
• Est. Priority Date: 09/12/1994
• Status: Expired due to Fees

• Current Assignee: SNS Technology LLC
• Original Assignee: So-Luminaire Daylighting Systems Corp.
• Inventors: Dominguez, Richard L.
• Primary Examiner(s): Gellner, Michael L.
• Assistant Examiner(s): MALLEY, DANIEL PATRICK
• Application Number:
  US08/304,513
• Time in Patent Office: 610 Days
• Field of Search: 359/591, 359/592, 359/593, 359/596, 359/597
• US Class Current: 359/592
• CPC Class Codes: E04D 13/033 provided with means for controlling the light-transmission or the heat-reflection, (e.g. shields, reflectors, cleaning devices)
• CPC Class Codes: F24S 2030/134 in the form of gearings or rack-and-pinion transmissions
• CPC Class Codes: F24S 30/452 Vertical primary axis
• CPC Class Codes: G02B 7/1827 Motorised alignment
• CPC Class Codes: Y02B 10/20 Solar thermal
• CPC Class Codes: Y02E 10/47 Mountings or tracking

Abstract

An improved system for synchronizing the positioning of a reflector assembly used in solar lighting apparatus for illuminating the interior of a roofed building. The reflector assembly is rotatable about a vertical access for tracking daily movements of the sun. The assembly includes return, track and seek sensors, the return sensor, in the turn-on mode, generating a signal corresponding to sensed sunlight, which energizes the systems motor. The system comprises the master tracking assembly and a plurality of follower units. Each motor shaft extends into a gear box and is coupled to a worm gear. A radial worm gear is mounted to a shaft member and is driven by the worm gear. The shaft member in turn drives the mirror reflector assembly. A stepper wheel having a plurality of indentations formed thereon is also mounted to the shaft member. The roller wheel of an associated switch coacts with the stepper wheel, the motor being intermittently turned off each time the roller wheel falls into a stepper wheel indentation as the shaft member is rotated. The system switches are mounted on a removable plate positioned within a gear box. A cover member encloses the gear box and is removable to allow access to the plate whereby the switches can be inspected and repaired, if necessary, without disassembly of the reflector mirror assemblies or removal of the reflector assembly from the skylight.

Claims

1. A solar lighting reflector apparatus for illuminating the interior of a roofed building during daylight hours and adapted to follow daily movements of the sum, the roofed building having a light transmissive opening in the roof thereon, said apparatus comprising:

a plurality of generally planar reflective panels for reflecting sunlight into the light transmissive opening, each of the reflective panels extending between first and second opposing ends along a generally horizontal longitudinal axis, the longitudinal axes of the plurality of reflective panels substantially being parallel to each other, the plurality of reflective panels including at least a frontmost reflective panel and rearmost reflective panel, the rearmost reflective panel being supported at a higher elevation than the frontmost reflective panel to avoid shading of the rearmost reflective panel by the frontmost reflective panel;

means for supporting said reflective panels above said light transmissive openings;

means coupled to said reflective panels for rotating said reflective panels when driven by a rotation force;

a rotatable shaft connected to said coupling means;

means for coupling the output shaft of a d.c. motor to said rotatable shaft whereby the reflective panels are directed to the sun as the sun moves throughout the day; and

a worm gear and stepper wheel mounted to said rotatable shaft.

2. The reflector apparatus of claim 1 wherein said stepper wheel is positioned within a box, one side of said box having a removable cover.

3. The reflector assembly of claim 2 wherein a removable plate member is positioned on the bottom surface of said box.

4. The reflector assembly of claim 3 wherein a plurality of switch components are mounted to said removable plate member.

5. The reflector assembly of claim 4 wherein said coupling means comprises a driver and an associated worm gear.

6. The reflector assembly of claim 4 wherein a stepper wheel is coupled to said rotatable shaft, said stepper wheel coacting with one of the switch components mounted on said plate member.

7. The reflector assembly of claim 6 wherein said stepper wheel has a plurality of indentations formed on its periphery and said coacting switch means includes roller means positioned to ride on the periphery of said stepper wheel.

8. The reflector assembly of claim 7 further including circuit means for controlling the operation of said d.c. motor, said circuit means being responsive to return and tracking signals generated by sensors mounted on a control box positioned on said reflector assembly comprising:

a repeat cycle timer coupled to said track signal;

a pulse generator coupled to the output of said repeat cycle timer;

relay means coupled to the output of said pulse generator;

switch means coupled to the output of said relay means, one output of which being connected to a first terminal of said d.c. motor; and

a return relay coupled to said return signal, a first output thereof being coupled to said switch means, a second output thereof being connected to a second terminal of said d.c. motor, the output of said switch means being connected to a roller wheel which is positioned to ride on the periphery of said stepper wheel.

9. The reflector assembly of claim 8 wherein a transformer provides d.c. power to said relay means and to said control box.

10. The reflector assembly of claim 1 wherein said supporting means comprises two leg members, each having first and second end portions, said first end portions of each leg member being connected to brackets mounted on said light transmissive openings.