Abstract: A communication apparatus is provided which permits system configuration to be freely changed even after electronic circuit boards are mounted to a shelf. The apparatus is a combination of an open rack and a shelf mounted on the rack, office cables for interconnecting external electronic devices are guided toward the rear of the apparatus and connected directly to external connectors of the electronic circuit boards, and a back wiring board is arranged on the rear surface of the shelf and has sheet connectors to which power supply connectors of the electronic circuit boards are connected.

Abstract: A music system is comprised of a subsystem and a main system. The subsystem includes a first musical tone-synthesizing device that synthesizes musical tones, based on performance data externally supplied thereto, and a mixing device that mixes together the musical tones synthesized by the first musical tone-synthesizing device and external musical tones externally generated and supplied thereto. The main system includes performance data-processing device that controls performance data indicative of musical tones to be performed and transmits the performance data to the subsystem at predetermined timing, and a second musical tone-synthesizing device that synthesizes musical tones, based on the performance data, when the first musical tone-synthesizing device is in a predetermined state. The main system transmits the musical tones synthesized by the second musical tone-synthesizing device to the subsystem, as the external musical tones.

Abstract: An electrically-operated system for the locks of a motor vehicle as a remote controller with a multifunction push button which, when first operated, locks the vehicle doors and sets a time window open within which a second actuation of the button will provide the antitheft mode. This arrangement allows a single push button to be used for both locking and antitheft operations.

Abstract: An integrated protection unit is a circuit breaker which includes basic overcurrent protection facility along with selective electrical accessories. A molded plastic accessory access cover secured to the integrated protection unit cover protects the accessory components contained within the integrated protection unit cover from the environment. A combined overcurrent trip actuator and multiple accessory module is either field-installed or factory-installed within the integrated protection unit. A separate actuator-accessory module is selected for different combinations of accessory functions. One such actuator-accessory module provides ground fault protection along with remote trip facility.