Abstract: A system for labeling a button in the field includes a label defining a peripheral boundary and a label-receiving surface defined by the button and adapted for receipt of the label. The label-receiving surface of the button defines a perimeter adapted to accommodate the peripheral boundary of the label. The button includes side and end portions defining raised edges or lips that define the label-receiving surface. The side and end portions serve to align the placement of the label on the label-receiving surface and also constrain lateral movement of the label. The side and end portions also protect the edges of the label against accidental dislodgement and peeling. The label typically has a suitable button identifier such as text, or a graphical design element such as an icon, printed thereon.

Abstract: A control system includes an electrical load control device responsive to radiant energy and a transmitter. The transmitter includes two sets of radiant energy generators connected to an electrical circuit such that polarity of the sets is reversed. A transmissive enclosure includes indented portions defining deflectors oriented obliquely with respect to a generator support surface. The transmitter is secured to a bracket for attachment to a backcover of the load control device. The control system may also include a master control generating an electrical control signal in response to an actuator or in response to a radiant energy signal. The control system is capable of limiting the master control to generate a signal only in response to the actuator. A power supply for the transmitter includes a filter network having a filter capacitor and resistor in series with a power supply capacitor and a diode in parallel with the resistor.

Abstract: A receiver for a radiated electromagnetic signal includes elements that respectively transmit a high percentage and a low percentage of the incident signal, in combination with a detector. The device is adapted for mounting on or near a horizontal surface, such as a ceiling. The signal is preferably in the infrared region of the spectrum. The receiver provides non-electronic gain control and, when the high-transmission element passes the signal wavelength preferentially over other wavelengths, it also provides improved noise immunity.