Abstract: In an elevator control system employing a variable-voltage and variable-frequency control, a control apparatus having limiter for limiting the maximum value of a slip frequency .omega..sub.s when the frequency .omega..sub.0 of current command values to be delivered to an inverter circuit for operating an induction motor is evaluated in accordance with a condition formula of .omega..sub.0 =.omega..sub.s +.omega..sub.4 (where .omega..sub.r denotes the angular rotational frequency of the induction motor), whereby an actual car speed can be limited to a safe low value even when the detected car speed is erroneous due to a malfunction of the car speed detection device. Also, the time period during which the generated slip frequency command signal exceeds a reference value is measured to determine the current frequency command signal for the induction motor.

Abstract: The present invention relates to an optical measuring apparatus for optically measuring physical quantities such as magnetic field, pressure and electric field, which is made from a substance being permeable to a light having a first wave length and shields a light having a second wave length, and in which shielding means changing a ratio of shielding the light having the second wave length in correspondence to a physical quantity to be measured is arranged in a transmission path through which said lights having two kinds of wave length are transmitted, said lights having two kinds of wave length, which passed through or by said shielding means, being received to calculate the ratio of a quantity of the light having the second wave length received to that of the light having the first wave length received, whereby measuring the physical quantity.

Abstract: A display signal generator device which allows the pulse width of a digital signal to be constant and the pulse repetition period to be proportional to the analog amount of an input signal so as to produce a signal to be displayed even by an analog or digital display unit 7 or 6, thereby obtaining a digital/analog common signal of average value proportional to the frequency even with the pulse signal. In order to maintain the pulse width constant, only a monostable multivibrator is, for example, added, thereby providing an inexpensive display signal generator device.

Abstract: A fuel control apparatus for an internal combustion engine includes an electronic control unit which has a memory to be set when the engine is operated under a given condition for a given time after a predetermined time has passed from the starting of the engine, or the engine is warmed up to reach a predetermined temperature. Burning-off operation is carried out when the memory is in the set condition after the engine has been stopped to thereby remove a deposit on a hot wire.

Abstract: A method for manufacturing a semiconductor device comprises the steps of forming a trench (2) on the major surface of a semiconductor substrate (1) and depositing a polysilicon film (5) on the entire surface of the semiconductor substrate (1) including the inside of said trench (2). In order to form complete isolation in the bottom portion of the trench (2), the trench (2) is filled with an oxide film (10). A refractory metal (12) such as tungsten which can be selectively deposited on polysilicon is deposited only on the polysilicon film (5) on the major surface of the semiconductor substrate (1). The oxide (10) inside the trench (2) removed and then, anisotropic etching of the polysilicon film (5) in the bottom portion of the trench (2) is performed utilizing the refractory metal (12) as a mask, so that isolation is formed in a self-aligning manner. thereafter, an oxide film (13) and a polysilicon film (14) are formed successively, so that three-dimensional charge storage capacitance is achieved.

Abstract: Three pairs of reversed polarity thyristors 20a,21a; 24a,25a; 28c,29c are connected directly between the three phases R, S, T of an AC power source and the corresponding phases of an elevator drive motor 5. The two pairs connected to the R and S phases implement upward driving, and the third pair connected to the T phase is used for both upward and downward driving but is held non-conductive during regenerative braking/deceleration when the motor operates in a two phase mode. Two additional thyristor pairs 22b,23b; 26b,27b which are used for downward driving are cross-connected between the R and S power source phases and two of the motor phases, to thus reverse the direction of motor rotation. Different individual thyristors in the pairs coupled to the R and S phases are selected in upward and downward deceleration modes. The overall circuit arrangement and firing selection/control scheme is designed to implement load sharing between the various thyristors and thus minimize duty cycle differences.

Abstract: A sewing machine control box mounted on a non-operative end of a sewing machine frame, and including a partition board which divides the control box into first and second chambers. A transformer which gives off heat in operation is provided in a first chamber, and a printed circuit board which otherwise might be damaged by the heat generated by the transformer is provided in a second chamber. The dividing of the control box into these first and second chambers prevents excessive heat transfer from the transformer to the printed circuit board during operation of the sewing machine.

Abstract: A computer system, such as a microprocessor-based computer system, which includes a program supervisory device for interrupting operations of the central processing unit of the computer system at any designated address, even in a case where the central processing unit has an instruction advance reading function. The interrupt address is stored in a register. A comparator outputs a coincidence signal when the interrupt address coincides with the current address supplied to the system memory. At that time, a multiplexer disposed in the system data bus disconnects the central processing unit from the memory and reconnects it via the system data bus to a register in which there has been prestored an interrupt or other instruction.

Abstract: A mobile type inspection apparatus for monitoring conditions in an environment or a facility containing radiation and a high temperature has a radiation dosage detector, a temperature detector, and a moisture detector disposed on a movable vehicle. Signals representing the monitored conditions are transmitted to a remote receiver which is included in a control system for operating the inspection apparatus and which has monitors for monitoring the conditions. Signals representing radiation dosage are supplied to a monitor and also to a comparison circuit for comparing radiation resistance limit data for the detectors which is stored in a memory with the detected data so as to generate a device exchange request when the accumulated radiation dosage exceeds the limit of any one of the devices. In a second embodiment, signals representing temperature and moisture are used for monitoring and also to calculate reaction acceleration and using time of the detectors to determine degree of deterioration thereof.

Abstract: In a supervisory control computer system of a compound generating plant, an output permission selecting switch for a man-machine interface means such as CRT, T/W or the like is installed corresponding to gas turbine generating facilities and steam turbine generating facilities, and condition of the output permission selecting switch is added to output requirements to the man-machine interface means, thereby selection of output/stop is performed per each of the generating facilities.

Abstract: A main potential generating circuit 11a receives AC voltage from a first AC power supply 40 and charges a substrate potential output terminal 9 with a prescribed potential. On the other hand, a reference potential generating circuit 11b receives AC voltage from a pulse generating circuit 3 as a second AC power supply and charges a reference potential point 9b with a prescribed potential. A differential amplifying circuit 20 detects difference between the potential of the substrate potential output terminal 9 and the potential of the reference potential point 9b and only when the difference is detected, it operates the first AC power supply 40 to charge the substrate potential output terminal 9.

Abstract: A moving staircase having an arcuate conveyor passage in plan view is disclosed in which the tread boards articulated in an endless fashion along the arcuate conveyor passage are each rotatably provided with a tread board axle in the widthwise direction, the tread board axle rotatably carrying outer and inner drive rollers near its outer and inner ends, respectively, and these outer and inner drive rollers are adapted to be supported on and guided by the outer and inner rails, respectively, secured to the main frame. The outer and/or inner drive rollers are prevented from derailing from the outer and/or inner drive rails by presser rails secured to the main frame, and side rollers mounted on the tread board axles to resist the radially inward force applied to the tread boards in operation are adapted to abut against the side surfaces of the outer and/or inner drive rails and the presser rails.

Abstract: A semiconductor integrated circuit device including: a first transistor whose base receives an input signal, and whose collector is connected to a high power supply voltage; a second transistor whose base is conducted to the emitter of said first transistor and whose emitter is connected to a low power supply voltage; a third transistor whose base is connected to the collector of said first transistor, whose collector is connected to said high power supply voltage, and whose emitter is connected to the collector of said second transistor directly or via a load element; and a fourth transistor whose base is connected to the emitter of said third transistor, whose emitter is connected to said low power supply voltage, and from whose collector an output signal of said semiconductor integrated circuit device is taken out.

Abstract: A multistage counter circuit comprising a plurality of counters connected in cascade, each providing a carry signal and having signal logic levels at an output of each stage inverted by main clock pulses and sub clock pulses, and means including a flip-flop connected at the output of each stage for synchronizing the carry signal of each stage with the main clock pulses to generate a carry signal to a succeeding stage unafffected by delays in the carry signal of a preceding stage.

Abstract: An ignition control system for an internal combustion engine has means for determining the maximum energizing time of an ignition coil from a signal synchronized with the ignition timing of the engine and controlling the period that the energizing current reaches a predetermined value to a predetermined value, thereby determining the maximum energizing time of the ignition coil from the signal synchronized with the ignition timing of the engine, detecting the energizing current of the ignition coil, and variably setting the maximum closed-circuit rate of energizing the ignition coil according to the operating state of the engine and a battery voltage.

Abstract: A zero-current arc-suppression circuit breaker arrangement having a series circuit including a capacitor power source previously charged and a switch connected in parallel with a series circuit formed of a circuit breaker and a diode. Upon operation, the capacitor power source provides a reverse current for reducing the current flowing to the circuit breaker to a zero-current level and the diode maintains the circuit breaker current at the zero-current level for a predetermined period of time. When the contacts of the circuit breaker are separated during this period, no arc plasma is generated to protect the circuit breaker from damage.

Abstract: An apparatus for analyzing in a mass spectrograph ions contained in gas emitted from a sample upon application of a laser beam spot to the surface of the sample, the apparatus including a vacuum vessel which houses the mass spectrograph therein, a support structure which supports the sample outside the vacuum vessel, a first laser irradiation device for applying a first laser beam to the surface of the sample, and a second laser irradiation device for applying a second laser beam to the flow of gas generated from the sample and flowing toward the mass spectrograph in the vacuum vessel through a nozzle provided in the same vessel.

Abstract: A vacuum circuit interrupter comprising in a vacuum vessel at least a pair of separable stationary electrode and a movable electrode, and a main shield surrounding the electrodes. The axial length L of the main shield is greater than T.sub.1 and smaller than (T.sub.1 +T.sub.2 tan 45.degree.), where T.sub.1 is the distance which is the sum of the gap length between the electrodes when the electrodes are separated and the thicknesses of the electrodes, and T.sub.2 is the shortest distance between the main shield and the electrodes.

Abstract: A manufacturing method for a diamond coil for a rotating electric machine comprises bending a straight conductor in a first plane at eight points so as to produce coil leads, coil ends, and coil straight portions. The conductor is next twisted about its longitudinal axis so as to bend the coil ends out of the first plane. The conductor is then bent in two in a second plane, which is perpendicular to the first plane and which includes the longitudinal axis of the conductor, until the two leads of the conductor point in approximately the same direction.

Abstract: An improved carriage assembly for linearly reciprocating a data converter pickup or the like. Magnetic circuits are provided on each side of a carriage, and a driving coil wound on a transversely solid type coil bobbin which surrounds the carriage, is magnetically linked with the two magnetic circuits. Guide rails are provided between the carriage and the two magnetic circuits. The moving elements including the carriage, the driving coil, and the bobbin are supported on the guide rails for linear movement therealong by rollers.