Abstract: An electronic door locking system for an automotive vehicle with which vehicle doors can be locked, by depressing a proper push-button type switch representative of a predetermined door-locking octal digit, only when an ignition key is not left in the ignition keyhole. Therefore, it is possible to lock vehicle doors without leaving the ignition key in the keyhole, with the result that the vehicle can be prevented from being stolen by a thief when parked. The electronic door locking system according to present invention includes a device for detecting the presence of the ignition key left in the ignition keyhole and outputting a signal to inhibit a door-locking command signal from being applied to a door lock actuating solenoid, in addition to the conventional electronic door locking system.

Abstract: A monostable switch device for controlling the rear window washer/wiper of an automobile, is incorporated into the steering-column control switch unit. Operation of the rear window washer/wiper switch device is effected by manual rotation of the windscreen wiper control lever about its longitudinal axis against a bias provided by a resilient tongue formed internally of the control-switch unit body. Rotation of the lever serves to displace a movable switch element whereby to complete the rear window washer/wiper energisation circuit; this circuit only remains completed through the monostable switch device for as long as the windscreen wiper control lever is held in its rotated position against the bias force.

Abstract: A weighting circuit operates to process a torque signal which may be produced by a strain gauge located within the handle of a drilling machine. The circuit includes a first sensor device for receiving the torque signal, and an integrator which integrates the torque signal when the amplitude of the torque signal exceeds a certain level as determined by the first sensor device. The output of the integrator is applied to a second sensor device which operates to switch off the machine when a predetermined integration value produced by the integrator is exceeded. The torque signal thus can be evaluated very thoroughly with the present circuit, so that improved control over the response of a drilling machine during blocking, jamming or twisting conditions, can be obtained.

Abstract: The power supply system comprises three levels: a primary level (PRI), a secondary level (SEC), and a tertiary level (TER). The secondary level is constituted by power supply circuits (S1 to Sn) which provide galvanic isolation between the primary and the tertiary levels, and which provide at least one intermediate voltage at a fixed level relative to a system reference potential (point R). The tertiary level comprises chopper power supplies (RD), converters (CV), and inverters (OND) connected to user equipment (UT).

Abstract: A power supply system for supplying a d.c. current from a center equipment to a terminal device through a two-wire line, is capable of properly supplying the current for communicating purposes irrespective of the connection condition of the two-wire line and accurately stopping the supply of current to the terminal device in the non-communicating condition.

Abstract: A vacuum switch of the type having contact electrodes which are coaxially movable with respect to each other for interrupting large currents. In one embodiment where a substantially cylindrical housing is arranged around the contacts, a radially inward bulge of metallic material is arranged near a center plane intermediate of the contacts. Such a bulge may be formed by inserting a metallic, annular insert within the housing, or producing an annular bulge in the housing itself. The bulge produces an inclination which is selected so that a plasma which flows from the arc which is produced upon interruption of the current is deflected in the axial direction. Such deflection reduces the stress on the vapor shield and is particularly advantageous with single-pulse switches which experience relatively long arcing times.

Abstract: A high frequency switching circuit comprised of a single-ended switching circuit, rectifying-smoothing circuit and magnetic amplifier which is connected between said single-ended switching circuit and rectifying-smoothing circuit. The magnetic amplifier includes a saturable reactor which has a coercive force Hc of 0.6 Oe or above and a rectangular ratio Br/Bs of 80% or below at an operating frequency of 20 kHz. The saturable reactor is prepared from an amorphous magnetic alloy having a composition of(Co.sub.1-a-b-c Fe.sub.a Ni.sub.b M.sub.c).sub.1-d X.sub.dwhere:M=one element selected from a group consisting of the elements of Nb, Cr, Mo, V, Ta, Ti, Zr and WX=B or a compound of B and Si in which the content of Si is set at 25 atomic % or less0.04.ltoreq.a.ltoreq.0.150.ltoreq.b.ltoreq.0.100.005.ltoreq.c.ltoreq.0.100.15.ltoreq.d.ltoreq.0.30.

Abstract: Welding cable and equipment wherein welding cable is color-coded and comprises respective composite cables that individually have as components a power cable and, attached thereto, a control cable. Color coding may be provided by paint, dye or other means at cable areas remote from natural wear areas. Preferably at least one of the cable elements of the composite welding cable will be provided with a durable rubber or other sheath that can accommodate heavy wear areas and abrasive conditions. Welding equipment is provided such that a maze of composite welding cables can be individually identified and manipulated, used and routed accordingly.

Abstract: Disclosed is a gas circuit breaker of resistance breaking type, which comprises a main breaking unit and a resistance contact mechanism electrically connected in parallel with the main breaking unit for resistively cutting off current. With the opening action of the main breaking unit, a spring used for opening the resistance contact mechanism is energized and the energized force of the spring is released by a releasing mechanism after the current in the main breaking unit is cut off, thereby to act as a drive force to open the resistance contact means.

Abstract: A residential energy controller includes a first bi-metal element having a free end and a stationary end. A second bi-metal element has a first end connected to the free end of the first bi-metal element. The second bi-metal element is included in a thermostat that controls an air conditioning apparatus for cooling the residence. A sensing device senses current delivered to the residence and produces a corresponding sense current. The first bi-metal element is electrically resistive. The sense current is forced through the resistive material of the first bi-metal element, causing it to be heated to a temperature that is related to the amount of power being delivered to the residence, thereby causing the free end of the first bi-metal element to rotate and causing the entire second bi-metal element to rotate. This causes the turn-on temperature of the thermostat to be increased by an amount related to the total power being delivered to the residence.

Abstract: In the method of welding open web steel joists a chord member is formed by bending a web in an undulating configuration. The chord is welded to the webs by simultaneously clamping and resistance welding to form four welds. The weld current is applied by a series of time controlled intermittent impulses of electrical current. The weld electrodes used are of unequal resistance so as to balance the heat generated.

Abstract: Apparatus for controlling the peak load demand of a home or business establishment by preventing the simultaneous application of electrical power to first and second electrical loads is disclosed. The apparatus includes first and second sensing means (16, 18), one each of which monitors each of the first and second electrical loads (12, 14) respectively for determining when the first and second electrical loads (12, 14) are demanding electrical power. The sensing means (16, 18) then provide sensing signals to a combining means (24) which receives the sensing signals, or representations of these sensing signals. Combining means (24) provides a timer start signal to timer (28) when the sensing signals or representations of these sensing signals are present at combining means (24).

Abstract: An arc welding process for welding a circumferential surface of a fixed pipe etc. by shielding a work part with a shield gas is provided. It is welded by a flat arc formed in a flat sectional view by simultaneously ejecting a gas from nozzles (19) to the arc formed between a welding torch (10) and a product for welding by placing a pair of the gas nozzle (19) for ejecting the gas at the end of the welding torch (10).

Abstract: A system for the control of a load such as a heating or cooling plant in response to changes in an external parameter, specifically ambient temperature, comprises a loop circuit with two conductors connected at an input end across a power supply and at an output end across a switching network, the load being inserted in one of these conductors. A high-impedance voltage multiplier connected across these conductors downstream of the load, in parallel with the switching network, supplies the necessary operating voltage to a parameter sensor such as a thermostat even when that network is in a low-impedance state so as to draw a maximum load current. The switching network may include a voltage clamp provided with a source of reference potential, e.g. a primary battery, which upon failure of the normal power supply can act as a standby supply insuring continued operation of a timer serving for a periodic switchover between different temperature thresholds for the thermostat.

Abstract: Not only an image signal of a scene of performance of musical instruments and a sound signal of such performance, but also the performance data of a specific musical instrument are recorded by a video system, and by virtue of a reproduction of this record, the image signal, the sound signal and the performance data are separated from each other. Thus, not only the image from the image signal and the electronically reproduced sound from the sound signal, but also a real automatic playing musical instrument such as player piano corresponding to said specific musical instrument is actually driven to effect a performance, whereby the watcher-listener is also able to listen to the performance sound of a real musical instrument.

Abstract: A method and apparatus for producing electroslag T-joints where fillets are required is provided by utilizing a water-cooled copper shoe with a slag relief notch placed along the weld joints to provide a dam for the fillet material; the location of the slag relief notch in the shoes of various radii is determined according to a precise formula which provides the required results.

Abstract: Disclosed is a muting circuit, in which the generation of click noise is prevented in that the muting operation is caused to occur at an instant when the instantaneous level (i.e., waveform level) of the input audio signal becomes zero for the first time since the appearance of a muting signal.

Abstract: A vacuum type circuit breaker which has an operating lever (31) connected at one end thereof to the movable electrode (102) of a vacuum switch tube (1) and at the other end to a closing spring (55) through an energy storage link mechanism (54). The operating lever (31) functions to drive the movable electrode (102). The energy storage link mechanism (54) is provided with an energy storage crank (52) pivotally supported on a shaft (2051). The force which the energy storage link mechanism (54) applies to the operating lever (31) is set such that it is less than a force on the operating lever (31) which is produced by the difference between the internal pressure of the vacuum switch tube (1) and atmospheric pressure. This arrangement makes it possible, upon occurrence of vacuum loss, to detect the vacuum shortage, whereupon the closing of the switch is prevented to thereby avoid an accident due to vacuum degradation.

Abstract: Multi-stage electrical load control apparatus includes current transformers for sensing the on and off status of electrical load elements and a predetermined priority system selectively allows different electrical load elements to be turned on and off in response to the sensed load status.

Abstract: A multi-signal transmission line is formed of a flat cable having a plurality of generally parallel conductors embedded in a dielectric core material, with an insulator jacket encasing the flat cable and being made of a dielectric material having a higher dielectric constant than the dielectric core material of the flat cable. The resulting composite transmission line cable insures that substantially all of the transverse electromagnetic propagation field created by the passage of a fast rise time pulse in a signal conductor is confined to the geometric area of the cable and the cable functions in a manner to greatly reduce the far end line-to-line interference (crosstalk) between the signal conductor and adjacent quiet lines.