Abstract: Frequency addressable micro-actuators having one or more movable resonating elements actuators, such as cantilevers, can be forced into oscillation by, e.g., electromagnetic actuation. The movable structure is designed to latch at a certain amplitude using one of several latching techniques, such as a near-field magnetic field. In operation, the movable element is driven into resonance, producing a large amplitude, which results in the structure latching. Through resonance, a small force applied in a repeating manner can result in the latching of the actuator, an operation which would normally require a large force. If two or more units, each with different harmonic frequencies, are placed under the same influence, only the one with a harmonic response to the driving force will latch. A single influencing signal may be used to latch more than one device on demand by tuning the frequency to match the natural frequency of the device of interest.

Abstract: In a multilayer ceramic substrate having a built-in capacitor provided in a ceramic laminate including a plurality of ceramic layers laminated to each other, the built-in capacitor being formed of a first capacitor electrode, a second capacitor electrode, and one of the dielectric glass ceramic layers, the capacitance value of the built-in capacitor is adjusted by performing laser trimming of the first capacitor electrode. The one dielectric glass ceramic layer is made of a TiO2-based dielectric glass ceramic layer in which the amount of dielectric grains including TiO2 is about 10 percent to about 35 percent by volume.

Abstract: The recreational vehicle jack remote control is for use with a recreational vehicle having a pair of support jacks which are raised and lowered by an electric motor connected to the jacks. The electric motor is controlled by a normally open, double-pole, triple throw switch in the recreational vehicle. The recreational vehicle jack remote control is a modification of the circuit which includes a portable radio frequency transmitter, at least one radio frequency receiver mounted in the recreational vehicle, and a plurality of relays. The transmitter has an "up" button for raising the support legs, and a "down" button for lowering the support legs. When the "up" button is pressed, the relay coil of at least one relay is energized, closing the relay switch contacts to apply current to the electric motor with the proper polarity for raising the legs.

Abstract: A solenoid driving circuit contains solenoids, each of which is driven to produce a magnetic field for driving each of keys of a player piano. A NPN transistor is provided to allow or block a flow of current across each solenoid. The solenoid is connected between a DC power source for providing a source voltage and a collector of the NPN transistor whose emitter is grounded. A drive signal, which is subjected to pulse-width modulation, is supplied to a base of the NPN transistor, so that the NPN transistor is switched over between ON and OFF. A diode is introduced to provide prescribed forward voltage for attenuation of the current across the solenoid when the NPN transistor is turned OFF. Herein, an anode of the diode is connected to a connection between the solenoid and NPN transistor, while a cathode of the diode is connected to a cathode of a zener diode having prescribed reverse voltage. An anode of the zener diode is connected to the DC power source.

Abstract: An enclosure is arranged to receive batteries utilized subsequent to or prior to a radio controlled auto racing event, wherein the batteries are cooled to provide for accurate indication of charging and discharging of the battery. The apparatus includes a fan to direct cooling air through the enclosure and in an embodiment to provide for a cooling medium selectively projected within the enclosure to enhance and accelerate cooling of the batteries. A modification of the invention includes charging and discharging circuitry to permit selective charging and discharging of the batteries when mounted within the enclosure.