Abstract: A wireless sensor for a load control system is adapted to be releasably mounted to a surface, such as a drop ceiling panel, to allow the optimum location of the sensor to be determined. A releasable mounting means of the sensor comprises two posts extending perpendicularly from a rear surface of the sensor. Each post has a small diameter and is rigid enough to pierce the panel without creating a large aesthetically-displeasing hole. The sensor may be permanently affixed to the panel by bending the posts at a rear surface of the panel without the use of a tool, such that the panel is captured between the mounting plate and the deformed posts. The sensor further comprises multiple test buttons provided on an outwardly-facing surface of the sensor for separately testing the communications of the load control system and the operation of the sensor. Alternatively, the releasable mounting means may comprise one or more magnets for magnetically coupling the sensor to a grid structure of the ceiling.

Abstract: A dimmer switch has a user adjustable high-end trim. The dimmer switch includes a bidirectional semiconductor switch, such as a triac, for controlling the amount of power delivered from a source of alternating current power to a lighting load, such as an electric lamp. A user-adjustable timing circuit controls the conduction time of the triac from a minimum time to a maximum time. The maximum possible conduction time of the triac is the high-end trim. The minimum possible conduction time of the triac is the low-end trim. The timing circuit includes a user-accessible switch that allows a user to reduce the high-end trim from a first nominal level to a second reduced level, lower than the first level, without substantially affecting the low-end trim. The switch allows a user to switch a transient voltage suppressor into and out of parallel connection with a resistor that is part of an RC timing circuit for the triac.

Abstract: A load control device has a modular assembly to allow for easy adjustment of the aesthetic and the color of the load control device after installation. The load control device comprises a user interface module and a base module. The user interface module includes an actuation member for receiving a user input and a visual display for providing feedback to the user. The base module has a controllably conductive device and a controller for controlling the amount of power delivered from an AC power source to an electrical load. A connector of the base module is adapted to be coupled to a connector of the user interface module, such that the controller is operatively coupled to the actuation member and the visual display.

Abstract: A pleated roller shade system allows a thin flexible shade fabric, such as, for example, silk, to be wrapped around a roller tube. The system comprises a pleating bar mounted parallel to the roller tube and having a fabric-receiving opening that defines, for example, a serpentine path. The shade fabric is received through the fabric-receiving opening and is folded by the pleating bar, such that the shade fabric is wrapped around the roller tube in folds as the roller tube rotates. The shade fabric is neatly wrapped around the roller tube (i.e., bunching of the shade fabric is avoided) and is stored out-of-sight when rolled up.

Abstract: A tensioned roller shade system for installation in an opening, such as a window or a skylight, comprises a frame, a roller tube rotatably mounted between side channels of the frame adjacent a first end of the frame, a conical, grooved spool mounted adjacent the roller tube, and a shade fabric is windingly received around the roller tube. A tensioning cord is operatively coupled between the spool and a fabric end of the shade fabric. The spool has a single groove, which wraps around the spool and windingly receives about the tensioning cord. A pulley is operatively coupled to the frame adjacent a second frame end and windingly receives the tensioning cord. The tensioning cord is adapted to bias the second fabric end toward the second frame end, such that the second fabric end of the shade fabric is adapted to move between the first and second frame ends as the roller tube is rotated.

Abstract: A load control system is operable to control the amount of power delivered to a plurality of electrical loads from an AC power source. The load control system includes a plurality of keypads, which each may include a different button assembly having a different button configuration or multiple button configurations. Each keypad is operable to determine the button configuration of the button assembly installed on the keypad in response to simultaneous actuations of the top button and the bottom button of the button assembly for a predetermined amount of time. Each keypad is further operable to store in a memory of the keypad data representing the button configuration. Therefore, after the keypad is installed in the field and the button assembly is replaced, the keypad can be easily configured to operate with the new button assembly.

Abstract: A power supply for a load control device generates a DC voltage and provides an asymmetrical output current, while drawing a substantially symmetrical input current. The power supply comprises a controllably conductive switching circuit for controllably charging an energy storage capacitor across which the DC voltage is produced. The energy storage capacitor begins charging at the beginning of a half-cycle and stops charging after a charging time in response to the magnitude of the DC voltage and the amount of time that the energy storage capacitor has been charging during the present half-cycle. The charging time is maintained substantially constant from one half-cycle to the next. The power supply is particularly beneficial for preventing asymmetrical current from flowing in a multiple location load control system having a master load control device supplying power to a plurality of remote load control devices all located on either the line-side or the load-side of the system.

Abstract: A self-contained tensioned roller shade system that can be easily installed in an opening, such as a window or a skylight. The roller shade system comprises a free-standing frame, a roller tube rotatably mounted between first and second side channels of the frame adjacent a first end of the frame, and a shade fabric is windingly received around the roller tube. A tensioning cord is operatively coupled between the roller tube and a second fabric end opposite the first fabric end, and is windingly received about the roller tube. A pulley is operatively coupled to the frame adjacent the second frame end and windingly receives the tensioning cord. The tensioning cord is adapted to bias the second fabric end toward the second frame end, the second fabric end of the shade fabric adapted to move between the first and second frame ends as the roller tube is rotated.

Abstract: A two-wire load control device, such as a dimmer, is operable to control the amount of power delivered to an electrical load, such as a magnetic low-voltage (MLV) load, and comprises a bidirectional semiconductor switch, a timing circuit, a trigger circuit having a variable voltage threshold, and a clamp circuit. When a timing voltage signal of the timing circuit exceeds an initial magnitude of the variable voltage threshold, the trigger circuit is operable to render the semiconductor switch conductive, reduce the timing voltage signal to a predetermined magnitude less than the initial magnitude, and to increase the variable voltage threshold to a second magnitude greater than the first magnitude. The clamp circuit limits the magnitude of the timing voltage signal to a clamp magnitude between the initial magnitude and the second magnitude, thereby preventing the timing voltage signal from exceeding the second magnitude.

Abstract: A dimmer switch for controlling the amount of power delivered to and thus the intensity of a lighting load comprises a visual display operable to provide a visual indication representative of energy savings and usage information. The visual display may comprise a single visual indicator or a linear array of visual indicators. The visual display is illuminated in a first manner when the intensity of the lighting load is less than or equal to a predetermined eco-level intensity, and is illuminated in a second manner when the intensity of the lighting load is greater than the eco-level intensity. For example, the single visual indicator may be illuminated a first color, such as green, when the intensity of the lighting load is less than or equal to the eco-level intensity, and illuminated a second different color, such as red, when the intensity of the lighting load is greater than the eco-level intensity.