Abstract: A control circuit of a tray changer is interfaced with a control circuit of a robot. A tray changer control program, used for operating the tray changer, is loaded into the robot control system. The robot control system itself, or an operator manipulating an operating terminal of the robot, controls or operates the tray changer according to the tray changer control program loaded in the robot control system.

Abstract: A control circuit for an air-bag mounted in a motor vehicle comprises an acceleration sensor for producing an acceleration signal indicative of acceleration of the vehicle, an ignition timing circuit for processing the acceleration signal to predict the time when a passenger's head will reach a front surface of the air-bag in fully deployed condition and producing a first air-bag deploying signal in accordance with the predicted time, and a damage discrimination circuit for processing the acceleration signal and judging the need of activation of the air-bag when the cumulative effect of the acceleration exceeds a predetermined limit. The damage discrimination circuit produces a second air-bag deploying signal when judging the need of activation of the air-bag. A so-called AND circuit is further employed which actually activates the air-bag when receiving the first and second air-bag deploying signals concurrently.

Abstract: A control circuit for an air-bag mounted in a motor vehicle comprises an acceleration sensor for producing an acceleration signal indicative of acceleration of the vehicle, an ignition timing circuit for processing the acceleration signal to predict the time when a passenger's head will reach a front surface of the air-bag in fully deployed condition and producing a first air-bag deploying signal in accordance with the predicted time, and a damage discrimination circuit for processing the acceleration signal and judging the need of activation of the air-bag when the cumulative effect of the acceleration exceeds a predetermined limit. The damage discrimination circuit produces a second air-bag deploying signal when judging the need of activation of the air-bag. A so-called AND means is further employed which actually activates the air-bag when receiving the first and second air-bag deploying signals concurrently.

Abstract: A control system for effecting ultra-precision temperature control for a controlled system having large load fluctuations or including a dead time component. A control unit (5) instructs a high-precision PID temperature controller (10) to renew and correct a control target value T.sub.0,NEW for the supply fluid temperature T.sub.0 only by a temperature difference .DELTA.T=T.sub.C -T.sub.2 between a set value T.sub.C for the return fluid temperature T.sub.2 of a heat transfer fluid and the actually controlled return fluid temperature T.sub.2. In response to the instruction, the high-precision PID temperature controller (10) controls the heating power of a heater (17) for heating control through a constant-power thyristor phase controller (16). The heater (17) heats the heat transfer fluid and sends it to a machining apparatus (1) through a closed damping tank (21). The heat transfer fluid exchanges heat with the machining apparatus (1) and is then returned to a precooling means.

Abstract: The peak amplitude values of two different frequency pressure changes produced by the displacement device of a volume sensing arrangement, are obtained and one divided by the other to produce a value indicative of the volume of the unfilled portion of a storage vessel. The contents of the vessel are derived by subtracting the unfilled volume from the vessel capacity. In the embodiments wherein a single pressure sensor is used, the signal is simultaneously filtered with a low pass filter and a band pass filter in order to obtain static and dynamic pressure data. In some embodiments the single sensor is disposed in a chamber in which the displacement means produces two different frequency pressure variations. The chamber is communicated with the storage vessel by a pipe the length and diameter of which are selected to prevent the pressure variations produced by one of the frequencies from being transmitted therethrough.

Abstract: A noise suppressing arrangement in the form of an interface is provided between a data transfer circuit and a driver associated with a display unit vacuum fluorescent display (VFD) tube. The driver and power supply circuits associated with the display unit feature improved arrangements which attenuate surges and spikes. The voltage appearing on the grid of the VFD is controlled by a circuit which is responsive to a signal produced by a microcomputer which controls the illumination and which induces changes in the voltages applied across the filament of the VFD. The level of illumination can be automatically controlled by light sensor and illumination levels above default values which are automatically reset to optimal values each time the system is initially energized.

Abstract: A temperature control apparatus for a machine tool includes four temperature sensors for detecting a reference temperature, outlet temperature of heat transfer fluid at an outlet of a heat exchanger, and temperatures of the heat transfer fluid at both inlet and an outlet of a machine tool element having a heat generating source. The four temperature sensors are arranged to constitute a differential temperature detecting means that activates control means to control temperature of the heat transfer fluid from the heat exchanger so as to minimize both deviations of heat transfer fluid temperature and steady-state deviations of machine tool body temperature.

Abstract: An indicator gauge is disclosed, which comprises a meter panel. The meter panel includes a transparent base plate, a transparent colored layer applied to a rear surface of the transparent base plate and a fluorescent transparent substance layer applied to a front surface of the transparent base plate. A visual alarm indicator includes an opaque mark mounted to a given portion of the meter panel, a lamp housing having an open end which is connected to a rear surface of the meter panel in such a manner as to face toward the given portion and an electric lamp installed in the lamp housing. An ultraviolet lamp is arranged in front of the meter panel and generates ultraviolet rays upon electric energization thereof.

Abstract: Herein disclosed is an automotive meter which comprises an opaque base plate constructed of one of natural wood and natural stone; graduations provided on a front face of the base plate, the graduations containing a fluorescent material; and an ultraviolet lamp located in front of the base plate.

Abstract: A meter driving device for indicating angular positions corresponding to input values. The device includes a memory for storing previously given input values, angular directions corresponding to the input values, and coefficients representative of the grades of change in angular direction depending on the change between adjacent two input values, as parameters. Based on these parameters and the frequency of input pulse signal giving the input values, the angular direction corresponding thereto is calculated. The angular direction signal receives PWM process and then supplies to a pair of crossed exciting coils via a driver. During a predetermined time period from the turning ON and OFF of the power source, the transference of the angular direction signals to the driver is shut out by logic gates, thereby inhibiting malfunctional meter indication.

Abstract: An indicator gauge is disclosed, which comprises a housing; a dial board installed in the housing; and a pointer arranged in such a manner that an elongate pointing portion moves over a front face of the dial board. A narrow band of fluorescent substance is centrally located longitudinally along the full length of the pointing portion. The narrow band is bordered on each side along the full length by remaining areas of the pointing portion free of any fluorescent substance to create a contrasting appearance for maintaining a distinction between the band and indicia on the dial board when subject to ultraviolet light. An ultraviolet lamp is arranged in front of the dial board and the pointer to excite and thus cause the fluorescent part of the pointer to emit visible light.

Abstract: An indicator gauge is disclosed, which comprises a meter panel. The meter panel includes a transparent base plate, a transparent colored layer applied to a rear surface of the transparent base platen and a fluorescent transparent substance layer applied to a front surface of the transparent base plate. A visual alarm indicator includes an opaque mark mounted to a given portion of the meter panel, a lamp housing having an open end which is connected to a rear surface of the meter panel in such a manner as to face toward the given portion and an electric lamp installed in the lamp housing. An ultraviolet lamp is arranged in front of the meter panel and generates ultraviolet rays upon electric energization thereof.

Abstract: In a head-up display apparatus for a vehicle, there are employed, a fluorescent display tube having a filament, a grid, and an anode positioned in a predetermined positional relationship; a power supply circuit for supplying a filament current to the filament of the tube and an anode voltage to the anode thereof; a display controller coupled to a display switch, for controlling the display tube so as to display various information of a vehicle on the display tube in response to a vehicle information signal and a switch signal of the display switch, the display switch being operated so as to display/erase the various information on/from the tube; and, a synchronized switching unit for controlling the supply of the filament current to the filament from the power supply circuit in synchronism with the switching signal of the display switch supplied from the display controller.

Abstract: A plastic wheel cover is disclosed, which comprises a cover proper constructed of a molded plastic; a plurality of latching units integrally and circularly arranged on one surface of the cover proper, each unit including a catching pawl extending away from the cover proper and a spring holder located near the catching pawl; and a ring spring held by the spring holders in a manner to press back surfaces of the catching pawls thereby to resilliently bias the catch pawls radially outwardly with respect to the cover proper.

Abstract: To prevent the driver from being confused by the fact that a pseudo vehicle speed to diagnose a vehicle speed meter is indicated when a vehicle speed sensor is disconnected by an accident during vehicle travelling, a pseudo vehicle speed sensor signal is applied to the vehicle speed meter only when the vehicle speed sensor is disconnected from the vehicle speed meter and the disconnected sensor is reconnected to the meter a predetermined time period after the sensor has been disconnected from the meter. The self-diagnostic apparatus is composed of counters, flip-flops and logical gates, and is reset whenever an ignition switch is turned on.

Abstract: Herein disclosed is a device for measuring a displacement of a movable member relative to a fixed member by putting the electromagnetic induction into practical use. The device comprises a first coil having first and second coil sections which are coaxially aligned along a common axis, a second coil arranged to establish a magnetic coupling with the first coil and extending along the common axis, and a short circuit ring arranged to establish a magnetic coupling with the first and second coils and movable relative to the same. The winding density of each of the first and second coil sections is gradually decreased from the outside end to the inside end thereof, and the winding density of the second coil is substantially even throughout the length of the same.

Abstract: A meter of the type having crossed coils, comprises an outer body having a cylindrical wall surrounding the coils, and an insert of an amorphous metal alloy that is disposed in a cylindrical bore defined by the wall. The insert surrounds the coils and is formed by rolling a strip of plate made of amorphous metal alloy. This construction provides an effective magnetic shield.

Abstract: An electrical connector comprises a housing formed with bores opening in an end wall thereof and locking arrangement for holding an electrical terminal in each of the bores, and a cover including an end wall and a peripheral wall. The cover is formed with partitions defining grooves extending inwardly from a predetermined portion of the peripheral wall thereof. The cover is formed also with projections at ends of some of the partitions. Cutouts are formed in the remaining portion of the peripheral wall of the cover. The housing has slots for receiving the projections of the cover and projections for engaging in the cutouts of the cover.

Abstract: Herein disclosed is a device for measuring a displacement of a movable member relative to a fixed member by putting the electromagnetic induction into practical use. The device comprises a first coil having first and second coil sections which are coaxially aligned along a common axis, a second coil arranged to establish a magnetic coupling with the first coil and extending along the common axis, and a short circuit ring arranged to establish a magnetic coupling with the first and second coils and movable relative to the same. The winding density of each of the first and second coil sections is gradually decreased from the outside end to the inside end thereof, and the winding density of the second coil is substantially even throughout the length of the same.

Abstract: A device for connecting a speedometer to a flexible shaft has an annular groove provided round the outer circumference of the stem of the meter, the stem being pierced by a rotating shaft which is connected to the inner shaft of the flexible shaft and is arranged to be rotated by the rotation of the inner shaft; a connecting tube consisting of a front tube part which is arranged to be fitted onto the stem and is provided with a pair of piercing holes confronting each other and a rear tube part which is coupled with the front tube part and is secured to the end of the flexible shaft; and a U-shaped embracing or arm member which is made of an elastic material and is provided with a pair of confronting claws at both ends thereof. The arm member is arranged to be fitted onto the outer circumference of the front tube part in such a way as to embrace it with the claws engaging the piercing holes. The claws are arranged to enter and engage the annular groove when the front tube part is fitted onto the stem.