Abstract: A surface-acoustic-wave filter has a pair of series-arm surface-acoustic-wave resonators and a shunt-arm surface-acoustic-wave resonator coupled in a T configuration. An additional bridging surface-acoustic-wave resonator is coupled between the input and output terminals, in parallel with the series arm. The bridging surface-acoustic-wave resonator provides enhanced attenuation of spurious signals at multiples of the passband frequency.

Abstract: A branching filter includes a transmitting filter and a receiving filter, both of the SAW-resonator type. The transmitting filter and receiving filter are housed in separate packages. The packages also include coupling circuitry and other necessary circuit elements such as inductor-capacitor chips. Accommodation of the SAW-resonator-type filters and other circuit elements in two separate packages leads to improved performance characteristics.

Abstract: The hoist control device controls the hoist in such a manner that once the speed change of the cage frame has accelerated at a fixed acceleration, constant speed is maintained, after which it decelerates at a fixed deceleration and stops. Meanwhile, the cage chamber position control device controls the cage chamber drive device in such a manner that once the speed change of the cage chamber driven by the cage chamber drive device has accelerated at a fixed acceleration, constant speed is maintained, after which it decelerates at a fixed deceleration and stops.

Abstract: An antenna duplexer has a first filter and a second filter coupled to respective signal terminals and to a common node. The common node is coupled to an antenna terminal. The first filter has a higher-frequency passband than the second filter. A transmission-line circuit, inserted between the first filter and the common node, increases the impedance of the first filter in its lower stopband. The transmission-line circuit includes an internal node, a first transmission line coupling the internal node to the common node, a second transmission line coupling the internal node to the first filter, and a grounding circuit such as a capacitor coupling the internal node to ground. The grounding circuit further enhances the lower stopband impedance of the first filter.

Abstract: A branching filter comprising a SAW resonator. The SAW resonator comprises a transmission SAW filter linked between an antenna terminal and a transmission terminal; a receiving SAW filter with different bandpass characteristics from the transmission SAW filter linked between the antenna terminal and the transmission terminal; a composite circuit that combines a frequency adjusting LC circuit linked between the antenna terminal and the transmission and receiving SAW filters with a branching filter circuit; and the branching filter circuit being structured to have a serial arm SAW resonator.

Abstract: A branching filter comprising a SAW resonator. The branching filter comprises a transmission SAW filter linked between an antenna terminal and a transmission terminal; a receiving SAW filter with different bandpass characteristics from the transmission SAW filter linked between the antenna terminal and the transmission terminal; a composite circuit that combines a frequency adjusting LC circuit linked between the antenna terminal and the transmission and receiving SAW filters with a branching filter circuit; and the branching filter circuit being structured to have a serial arm SAW resonator.

Abstract: A receiving filter of a SAW separator that prevents temperature increase, and enables to improve electric power-resisting property and attains high performance. A series arms and parallel arms of a transmitting filter and receiving filter are equipped with ladder type filters comprising SAW resonators. In the receiving filter, the number of pairs of finger electrodes of a parallel arm resonator P1 arranged at the first stage viewed from input side is larger than the number of pairs of finger electrodes of parallel arm resonators P2, . . . at other stages. Or interdigitated width of finger electrodes of the parallel resonator at the first stage is made longer than interdigitated width of finger electrodes of each of parallel resonators at other stages.

Abstract: An emergency stop state releasing method for an elevator, which includes a cage configured to ascend and descend along a first guide rail in an elevator shaft, a counterweight configured to ascend and descend along a second guide rail in the elevator shaft, a cable for suspending the cage and the counterweight, a drive unit in the elevator shaft for driving the cable to move the cage up and down in the elevator shaft, and an emergency stop mechanism attached to the cage and configured to engage the guide rail, thereby urgently stopping the cage, and to lift the cage, thereby canceling an emergency stop state, including the steps of setting a removable winding device in the elevator shaft, and driving one of the cage and the counterweight by means of the winding device to lift the cage and cancel the emergency stop state.

Abstract: An elevator having a cage disposed inside guide rails, a damper unit, a vibration sensor, and a control circuit. The damper unit is controlled by the control circuit in response to vibrations of the cage which are detected by the vibration sensor. The vibration sensor detects the vibration of the cage, converts the vibration into an electric signal, and transmits the electric signal to the control circuit. The control circuit compares the electric signal with a predetermined value and controls the coefficient of viscous damping of the damper unit according to the result of the comparison. Accordingly, vibrations of the cage are absorbed and reduced, and the elevator provides a more comfortable ride.

Abstract: An assembled cam shaft including a steel cam shaft member, a journal member made of sintered material and a cam lobe. The sintered material consisting essentially of 0.5 to 4.0% by weight of carbon, 0.1 to 0.8% by weight of phosphorus, 5 to 50% by weight of copper, 1% by weight or less of manganese, 2% by weight or less of silicon, and the balance being iron and impurities.

Abstract: A method and device for the examination of a joint between a hollow steel shaft and a piece joined to the steel hollow shaft of a composite camshaft using ultrasonic examination. In the ultrasonic examination, the composite camshaft is put into a liquid and a probe of an ultrasonic search unit is inserted inside of the hollow steel shaft. The ultraonic examination of the joint is performed from inside of the hollow steel shaft. According to the ultrasonic examination, any kind of joint of the composite camshaft is possible, because a distance from an inside surface of the hollow steel shaft to the joint is constant. In addition, since the probe does not contact the inside surface of the hollow steel shaft, the probe is not consumed due to abrasion.

Abstract: A method and device for the examination of a joint between a hollow steel shaft and a piece joined to the steel hollow shaft of a composite camshaft using ultrasonic examination. In the ultrasonic examination, the composite camshaft is put into a liquid and a probe of an ultrasonic search unit is inserted inside of the hollow steel shaft. The ultrasonic examination of the joint is performed from inside of the hollow steel shaft. According to the ultrasonic examination, any kind of joint of the composite camshaft is possible, because a distance from an inside surface of the hollow steel shaft to the joint is constant. In addition, since the probe does not contact the inside surface of the hollow steel shaft, the probe is not consumed due to abrasion.

Abstract: A hollow cam shaft for use in an internal combustion engine is disclosed. The cam shaft includes a steel pipe, a journal portion and a cam portion. The journal portion is provided at a part of the outer peripheral surface of the steel pipe and having an outer diameter smaller than that of the steel pipe. A cam lobe is assembled on the other portion of the outer peripheral surface of the steel pipe. The journal portion is formed by cutting the part of the outer peripheral surface of the steel pipe by a uniform axial length and radial depth.

Abstract: A wear resistant sintered alloy consisting essentially of from 2.0% to 3.5% by weight of C, from 0.3% to 0.8% by weight of P, from 0.5% to 3.0% by weight of Mn and remainder Fe. The alloy is sintered in the liquid-phase.

Abstract: The method of manufacturing a lightweight, low cost hollow cam shaft includes the steps of forming an integral journal portion in a hollow pipe member by inwardly deforming a portion of the pipe member, such as by coining or spinning, the outer surface of the deformed portion being the bearing surface. Annular grooves formed immediately adjacent the inwardly deformed portion allow residue from an optional finish-grinding operation to escape. Cam members having fitting holes are fixedly mounted on undeformed pipe portions, or on outwardly deformed pipe portions.