Abstract: In an LED unit, all of eight LEDs are connected in series. The voltage of a power supply, that is, a battery of a vehicle, 12 V, is insufficient for the eight LEDs. To cope with this, a boosting circuit is provided within the control unit to boost the voltage to about 16 V which is then applied to the eight LEDs. The front end of the LED unit is connected to a constant-current circuit, and a voltage detection circuit is provided near and connected to this constant-current circuit for detecting the voltage applied to the constant-current circuit. The voltage detected by the voltage detection circuit is compared with a reference voltage drawn from the power supply, is amplified in an amplifier, and is input as a boosting control signal into the boosting circuit. The boosting control signal is output so as to regulate the boosted voltage in such a manner that the voltage detected in the voltage detection circuit is a lowest possible voltage.

Abstract: A circuit for an illuminator includes LEDs (DL1, . . . , DL6) which are connected to resistors (R1, . . . , R6) respectively in series to provide six series units and twos of these series units therein are connected in parallel and moreover threes of these parallel units are connected in series in a lattice arrangement. Even when DL2 undergoes disconnection, for example, an increased amount of current flowing in DL1 can thus be restrained as much as possible and even when LEDs with variable forward voltage are connected in parallel, a difference in the flowing amount of current between the LEDs is minimized and a difference in brightness is substantially nullified. Moreover, as resistors are added to the respective units, the number of LEDs can freely be changed by directly connecting units with the omission of the LED.

Abstract: In an LED unit, all of eight LEDs are connected in series. The voltage of a power supply, that is, a battery of a vehicle, 12 V, is insufficient for the eight LEDs. To cope with this, a boosting circuit is provided within the control unit to boost the voltage to about 16 V which is then applied to the eight LEDs. The front end of the LED unit is connected to a constant-current circuit, and a voltage detection circuit is provided near and connected to this constant-current circuit for detecting the voltage applied to the constant-current circuit. The voltage detected by the voltage detection circuit is compared with a reference voltage drawn from the power supply, is amplified in an amplifier, and is input as a boosting control signal into the boosting circuit. The boosting control signal is output so as to regulate the boosted voltage in such a manner that the voltage detected in the voltage detection circuit is a lowest possible voltage.

Abstract: A drive machine for elevators comprises a rotatable drive sheave (16) over which a main cable (18) for hanging an elevator cage is wound, a stationary shaft (9) for supporting rotation of the drive sheave and bearing a load applied to the drive sheave from the main cable, a field magnet (14) attached to the drive sheave, constituting a part of an electric motor, and comprising at least one pair of magnetic poles, an armature (11, 12) attached to the stationary shaft in a facing relation to the field magnet and constituting another part of the motor, and a field magnetic pole detector (27) for detecting the predetermined magnetic pole of the field magnet rotated together with the drive sheave.

Abstract: A drive machine for elevators comprises a rotatable drive sheave (16) over which a main cable (18) for hanging an elevator cage is wound, a stationary shaft (9) for supporting rotation of the drive sheave and bearing a load applied to the drive sheave from the main cable, a field magnet (14) attached to the drive sheave, constituting a part of an electric motor, and comprising at least one pair of magnetic poles, an armature (11, 12) attached to the stationary shaft in a facing relation to the field magnet and constituting another part of the motor, and a field magnetic pole detector (27) for detecting the predetermined magnetic pole of the field magnet rotated together with the drive sheave.

Abstract: A drive machine for elevators includes a rotatable drive sheave over which a main cable for hanging an elevator cage is wound, a stationary shaft for supporting rotation of the drive sheave and bearing a load applied to the drive sheave by the main cable, a field magnet attached to the drive sheave, constituting a part of an electric motor, and including at least one pair of magnetic poles, an armature attached to the stationary shaft facing the field magnet and constituting another part of the motor, and a field magnetic pole detector for detecting a magnetic pole of the field magnet rotating together with the drive sheave.

Abstract: A drive machine for elevators includes a rotatable drive sheave over which a main cable for hanging an elevator cage is wound, a stationary shaft for supporting rotation of the drive sheave and bearing a load applied to the drive sheave by the main cable, a field magnet attached to the drive sheave, constituting a part of an electric motor, and including at least one pair of magnetic poles, an armature attached to the stationary shaft facing the field magnet and constituting another part of the motor, and a field magnetic pole detector for detecting a magnetic pole of the field magnet rotating together with the drive sheave.

Abstract: A drive machine for elevators includes a rotatable drive sheave over which a main cable for hanging an elevator cage is wound, a stationary shaft for supporting rotation of the drive sheave and bearing a load applied to the drive sheave from the main cable, a field magnet attached to the drive sheave, constituting a part of an electric motor, and including at least one pair of magnetic poles, an armature attached to the stationary shaft facing the field magnet and constituting another part of the motor, and a field magnetic pole detector for detecting a magnetic pole of the field magnet rotating together with the drive sheave.