Abstract: A pendulum acceleration sensor includes a plate-like pendulum, at least a pair of detection sensors, and a holder unit. The pendulum swings about a shaft in a direction parallel to the side surfaces of the pendulum in accordance with an acceleration. The pair of detection sensors are arranged to oppose each other with the pendulum interposed therebetween to detect the displacement amount of the pendulum upon swing. The holder unit is constituted by sensor storing members for storing the detection sensors and positioning the detection sensors with respect to the pendulum, and shaft support members integrally formed with the sensor storing members to pivotally support two ends of the shaft of the pendulum and define a swing space for the pendulum.

Abstract: A servo accelerometer includes a pendulum, a coil, a detection unit, and a servo unit. The detection unit has a photopotentiometer for receiving light passing through a slit of the pendulum and outputting a detection output on the basis of a change in resistance corresponding to a change in irradiation point. The servo unit has a displacement detection circuit for outputting a difference between a detection output from the photopotentiometer and a set value as a detection displacement amount.

Abstract: An indicator includes an indicating member driving unit, an encoder plate, a rotational position detecting unit, and an indication position control unit. The indicating member driving unit rotates an indicating member mounted on a rotor shaft in accordance with an electrical signal input to cause the indicating member to indicate. The encoder plate rotates in association with the indicating member. The rotational position detecting unit detects an actual indication position of the indicating member on the basis of a rotational amount of the encoder plate. The indication position control unit controls the indication position of the indicating member so that the actual indication position of the indicating member detected by the rotational position detecting unit coincides with an indication position of the indicating member determined in correspondence to the electrical signal input.

Abstract: A device for preventing an outflow of a fuel vapor from a fuel tank comprising a breather pipe which connects the upper interior of the fuel tank to a charcoal canister. A float-valve assembly is mounted on the upper wall of the fuel tank. This assembly comprises a breather passage connected to the charcoal canister via the breather pipe, a normally closed solenoid valve arranged in the breather passage, and a float normally allowing the breather passage to be open to the interior of the fuel tank. When the replenishment of the fuel tank is carried out, the solenoid valve is opened to feed fuel vapor in the fuel tank into the charcoal canister.

Abstract: A light shielding plate rotated by the shaft of an object to be measured is provided with a slit. The distance between the slit and the axis of the shaft varies continuously. A light source and a linear light receiving element are disposed on opposite sides of the light shielding plate.

Abstract: The swinging angle of fins of an air conditioner or the like is controlled by control apparatus including a fin driver for swinging the fin about a pivot thereof, fin swinging angle adjusting means and an adjusting mechanism for adjusting the center of the swinging angle of the fin.

Abstract: In a piezoelectric pressure indicator comprising a casing, a pressure receiving member at the bottom of the casing, piezoelectric elements mounted on the pressure receiving member, an acceleration compensating weight and acceleration compensating piezoelectric elements, both piezoelectric elements being connected such that the voltage produced thereby cancel with each other, thereby compensating for an effect of acceleration, an uppermost acceleration compensating element is formed with a perforation, and a lead wire for deriving the voltage is connected to the electrode of a lower imperforate acceleration compensating piezoelectric element to extend through the perforation of the imperforated element. In a modification, the pressure receiving member is covered by a heat resistant protective layer made of ceramic.

Abstract: A handy type printer with dry cells incorporated therein in which an arrangement consisting of dry cells and a paper feed motor aligned, a screw shaft for sliding a head therealong and a head-driving motor are disposed in the order named in parallel with each other; the ends of a platen and the head-driving screw shaft are supported by first and second shaft bearing members, respectively; and a plurality of reduction gears are rotatably mounted on the first shaft bearing member so as to transmit the torques of the paper feed motor and the head-driving motor to the platen and the head-driving screw shaft, respectively.

Abstract: An angle change detector which can also be used as an inclination angle detector comprises a pair of opposing magnets, a sector-shaped pendulum made of an electroconductive non-magnetic material and swingable past a spacing between the opposing magnets, and a pair of photosensors disposed on both side edges of the pendulum. Each photosensor comprises a light emitting diode and a phototransistor disposed on both sides of the pendulum. Output signals of the phototransistors are compared with a reference signal for producing an output signal corresponding to the degree of swinging of the pendulum.

Abstract: An angle change detector which can also be used as an inclination angle detector comprises a pair of opposing magnets, a sector-shaped pendulum made of an electroconductive non-magnetic material and swingable past a spacing between the opposing magnets, and a pair of photosensors disposed on both side edges of the pendulum. Each photosensor comprises a light emitting diode and a phototransistor disposed on both sides of the pendulum. Output signals of the phototransistors are compared with a reference signal for producing an output signal corresponding to the degree of swinging of the pendulum.

Abstract: A pulse generator combined with a micromotor is constructed by a disc shaped rotary magnet secured to the shaft of the motor and magnetized in the axial director, a rotary yoke made of magnetic material and provided with a plurality of equally spaced magnetic pole teeth extending in the axial direction, a magnetic stationary yoke secured to the casing of the micromotor and disposed to oppose the magnetic pole teeth of the rotary yoke, and a printed board interposed between the stationary yoke and the rotary yoke and secured to the motor casing. The printed board is formed with a wavy continuous electroconductive pattern on a circle facing the magnetic pole teeth so as to induce electric pulse signal by the flux produced by the magnetic pole teeth. The printed board is also formed with output terminals and source terminals connecting the micromotor to an electric source.

Abstract: In an arc preventing apparatus of a transfer switch connected to an inductive load, the movable contact of the transfer switch is stopped temporarily while it is transferred from one stationary contact to the other by means of a rotary cam. The cam is provided with a high point, a low point and a peripheral portion intermediate the high and low points so that while the actuating lever of the movable contact is engaging the intermediate peripheral portion, the movable contact is held stationary.

Abstract: In an inclinometer of the type wherein inclinations in the fore and aft and left and right directions of a motor car are displayed independently, there are provided a pair of intermeshing sector gears, weights mounted on one of the sector gears, display discs mounted on shafts of one sector gears, and a scale cooperating with respective display discs for displaying pitching and rolling angles of the motor car.

Abstract: An inclinometer of the type wherein a weight rotatable in accordance with the inclination of a vehicle is provided for a drive unit, and a torque of the drive unit is transmitted to a driven unit so as to display the inclination angle of the vehicle with an inclination indicator, there are provided a zero point adjusting spiral spring, the inner end thereof being affixed to a shaft of the driven unit, while an outer end is affixed to a rotary drive member, and a zero point adjusting knob for rotating the rotary drive member. According to this invention, after the zero point has been adjusted, the zero point display line of the indicators and the zero point scale line of the scale board can be aligned horizontally, thus improving the appearance of the zero point display.

Abstract: An apparatus for illuminating instrument pointers comprises a dial board having a shaft hole, pointer shafts provided perpendicularly to a pointer shaft drive unit and projecting through the shaft hole to the front of the dial board, a light conductive member having a light receiving section and a light transmission section made of a transparent material and disposed behind the dial board, a plurality of instrument pointers each having a collar section and a pointer section made of a transparent material and mounted on the pointer shaft such that a light beam emitted from the light transmission section is introduced through the collar section, and a light emitting member provided oppositely to the light receiving section. A light beam from the light emitting member is propagated through the light conductive member to the collar section and then to the pointer section, so that each instrument pointer is illuminated.

Abstract: A plurality of counters are connected with a plurality of correction terminals for independently correcting counts of the counters. An initializing circuit is connected between initializing terminals of the counters and the correction terminals. An initializing signal generator is connected between an input line from the power source and the correction terminals, for initializing the counters to predetermined counts only when signals are simultaneously applied to the correction terminals.

Abstract: In a digital electronic timepiece in which days of the week, hours and minutes are displayed on a display device and the displayed days of the week, hours and minutes can be corrected with a correction switch, a time correction switch is used to also correct a displayed day of the week.

Abstract: An electronic display device for use in a motor car wherein the contents of the display are determined by the respective positions of a manually operated switch and the ignition switch is disclosed. A control circuit detects the respective positions of the two switches and thereby determines the data to be displayed.

Abstract: A motor is energized by a source through first and second transfer switches. Each transfer switch is operated by a switching transistor. The switching transistor for the first transfer switch is driven by a drive signal while the switching transistor for the second transfer switch is driven by the output of a delay circuit responsive to an excessively large current flowing through the motor. A self-holding switch is provided to connect the motor to the source through the second transfer switch.