Abstract: A coordinated system of printed circuit board (PCB) assemblies for displaying information, such as advertising and pricing information. Each individual PCB assembly may display a unit price, such as a price for particular type of gasoline or other product. Each complete PCB assembly may have a number of Light Emitting Diode (LED) modules. The LED modules may be interconnected with one or more plug-in back panel modules attached to a housing and to power and control buses. The module housing may be interconnected with a main power supply and a controller. The controller may be configured to remotely and automatically change the price for each PCB assembly within the coordinated system. Each LED module may include a dedicated processor and be configured to have male connectors to plug into corresponding female receptacles on the power and control buses facilitating ease of installation, and replacement or repair of individual LED modules.

Abstract: A vibration actuator in which a magnetic circuit device (1,2,3) is elastically suspended to a vibration transmitter (12) by a suspension plate (5)in a predetermined direction, a primary elastic member (6a) is interposed between the suspension plate and the magnetic circuit device in the predetermined direction. A coil (10) is fixed to a vibrating member (9) and disposed in a magnetic gap of the magnetic circuit. It is preferable that the suspension plate has a leaf spring portion extending along a spiral curve between central and peripheral portions thereof.

Abstract: An acoustic signal generator, and a method for generating an acoustic signal are described. The acoustic signal generator has a membrane that can oscillate, a deflection sensor for detecting any deflection of the membrane, an exciter configuration that is coupled to the membrane, and a power semiconductor switch with a load path that is connected to the exciter configuration. The switch has a drive connection. A drive circuit has a first connection connected to the drive connection of the power semiconductor switch and at which a drive signal is available. The drive circuit further has a second connection, to which the deflection sensor is connected.

Abstract: An electromagnetic sound generator has a vibrating plate mounted in a case. An armature is secured on the vibrating plate at a central portion thereof. The armature has a concave spherical shape.

Abstract: An electromagnetic sound generator has a vibrating plate mounted in a case. An armature is secured on the vibrating plate at a central portion thereof. The armature has a concave spherical shape.