摘要:
A control element for switching and controlling an electrical appliance having a cover panel includes a support (4) for receiving a top part, which can be attached and removed. The support can be glued onto the front panel (2), which need have no openings. Elements (14, 15, 16, 17) are in the top part for causing an indirect control transmission through the front panel, with sensors (5, 6, 7, 8, 9, 21, 22) behind the front panel (2) electrically sensing the indirect control transmissions and carrying out operational functions of the electrical appliance.
摘要:
A shield for resisting the passage of electromagnetic emissions in a computer is formed from a rectangular plate having apertures for receiving various electrical connectors that insert into the computer. Each aperture in the plate has grounding members for engaging the connectors. The plate also has a row of spring-like wiping members along each of the four side edges. Two edges of the plate each have a single row of wiping members, and two edges of the plate have two opposed rows of wiping members. The opposed rows are interposed with each other in an alternating sequence. One of the two opposed rows forms a series of folds, and the other row forms a series of tabs. The shield is mounted to the side edge flanges of a rectangular opening in the wall of the computer. Two of the flanges slidingly engage the single row of wiping members. The other two flanges insert into the folds and contact with both the folds and the tabs. After the shield is installed, the computer cables and connectors are inserted through the apertures and interconnected with the computer. As the cables and connectors move, the double-row wiping members allow the shield to float in the computer opening while maintaining electrical grounding contact with all four of its flanges.
摘要:
A microprocessor controlled ballast includes a single front end and a plurality of inverters separately controlled by a single microprocessor. Lamps are operated in groups according to separate line inputs to the ballast. Total power is reduced to fifty percent or less if a line input is off.