Abstract: Breakerless capacitor discharge ignition system for internal combustion engines in which a charge coil and ignition coil are disposed on ferromagnetic core. A changing flux is established by rotation of permanent magnets past the core. The charge coil is connected to charge a capacitor in circuit with a silicon controlled rectifier (SCR) for discharging the capacitor through the primary winding of an ignition transformer. The charge coil and transformer are wound on the core such that voltages of opposite polarity are simultaneously induced therein by the changing magnetic flux. A half way voltage of one polarity charges the capacitor and a voltage of opposite polarity induced in the secondary winding by the changing magnetic flux triggers the SCR to its conductive state discharging voltage stored on said capacitor through the primary winding of the ignition coil.

Abstract: A silicon controlled rectifier (SCR) lamp supply trigger circuit, responsive to control circuitry, produces trigger currents for the SCR which transmits the required voltage to illumination lamps in a document image capturing system. The trigger circuit includes a single AC input supply voltage having a positive and negative portion and electronic components for accumulating the respective voltage portions and isolating them to avoid unwanted signal interference with the control circuitry regulating the lamp supply voltage. Devices discharge the voltage accumulating components in response to the control circuitry of the SCR lamp supply and feed the discharged voltage to an apparatus for conversion to a current for triggering the SCR. Residual voltages remaining on the voltage accumulating components are automatically discharged during that portion of the AC input supply voltage which is opposite to the polarity of the charges stored on the voltage accumulating components.

Abstract: An oil burner ignition circuit using a relaxation oscillator is disclosed. The step-up transformer has a tertiary winding magnetically coupled to a primary winding. The tertiary winding and a diode controls the dissipation in the circuit, and the recovery of energy to a capacitor of the relaxation oscillator.

Abstract: In an ignition system for internal combustion engines having a magneto generator for charging a capacitor and a thyristor for discharging the capacitor through an ignition coil upon receiving an ignition signal, an auxiliary capacitor and an associated transformer are provided as a source of the ignition signal. The auxiliary capacitor is charged through the transformer by each half-cycle of the magneto generator output of the opposite polarity with respect to the charging half-cycle of the capacitor. The auxiliary capacitor is discharged through the gate-cathode path of the thyristor under control of an auxiliary switching element to which a timing signal generator provides a timing signal at a proper ignition time.

Abstract: An ignition system for internal combustion engines in which a capacitor is charged at each one-polarity half-cycle of the output of a magneto generator and then the capacitor is discharged through a thyristor and a primary coil of an ignition coil when the thyristor is turned on. To turn on the thyristor, a gate-cathode current is supplied through a semiconductor switching element from an auxiliary capacitor which is charged by a timing generator which generates an output prior to only a predetermined ignition time. Although the semiconductor switching element is turned on by an ignition signal generating means, for example, a transformer, when the transformer produces an ignition signal at each the other-polarity half-cycle of the magneto generator output, the gate-cathode current is supplied to the thyristor only when the auxiliary capacitor has been charged by the timing generator.

Abstract: A capacitor discharge ignition system is provided with an ignition timing control arrangement to achieve a predetermined ignition timing retard characteristic at high engine speeds and thus provide engine speed control. The capacitor discharge ignition system is positioned adjacent a rotating permanent magnet that is rotated over a path in synchronism with the operation of an engine to be controlled.The capacitor discharge ignition system includes a stator core having disposed thereon an ignition coil and a control coil. As a first pole of the magnet passes the stator core, a voltage and current of a first polarity is induced in the control coil to charge a storage capacitor. As the second pole of the magnet passes the stator core, a voltage and current of the opposite polarity is induced in the control coil and a control arrangement responsive to the control coil discharges the capacitor into a primary winding of the ignition coil.

Abstract: Changes in the magnetic field around a Wiegand wire created by a magnetic rotor coupled to a shaft of the engine induce a signal in a sensing coil. The signal is applied to an input switch which forms part of a control circuit. The output of the control circuit is connected to an interrupter switch connected in series with an ignition coil such that a spark is created at the secondary of the ignition coil when the interrupter switch opens. The control circuit maintains the interrupter switch in the nonconductive state for a predetermined percentage of the ignition cycle at low engine speeds and for a lesser percentage at high engine speeds so that enough energy can build in the ignition coil prior to the next interruption at the higher speeds.

Abstract: An ignition system for an internal combustion engine comprises a primary current control switch provided in parallel with an exciter coil and the primary of the ignition coil, energized by an exciter coil producing an AC voltage in time with rotation of the engine crank shaft. The primary current control switch is made conductive in advance of the ignition angle to permit a current to flow therethrough, and is made nonconductive at the ignition angle to cause sudden increase in the primary current. The ignition system is characterized in that the core of the ignition coil has a magnetic retentivity and by comprising resistor means for providing a path for a current through the primary in the opposite direction to the current which flows through the primary at the ignition angle.

Abstract: An ignition system for a multicylinder engine comprising a magneto having an igniting exciter coil to induce an AC voltage in synchronism with rotation of the engine; ignition coils having secondary coil portions respectively connected to ignition plugs for cylinders of the engine, to supply a high voltage to the respective ignition plugs; and a primary current controlling semiconductor switch connected to the igniting exciter coil in parallel therewith to be turned on in advance of respective igniting positions of the cylinders so that a current flows through the semiconductor switch.

Abstract: A breakerless pulse generating and distributing system in which sensor-switches (such as Hall effect switches and LED triggered switches) in a distributor transmit a timing pulse to one of a plurality of series connected power switches. The sensor-switches are powered by the timing pulses being transmitted and a constant current drain is avoided.

Abstract: An electronic magneto ignition for internal combustion engines has a permanent magnet mounted on the engine fly wheel and rotating therewith. A magnetic field coil has a primary winding and a secondary winding in which ignition current and ignition voltage, respectively, are produced during the passage of the permanent magnet. A switching transistor is connected in parallel with the primary winding and in parallel with a diode poled opposite to the emitter-collector path of the transistor. An electronic control circuit blocks the switching transistor at the desired ignition time so that the primary circuit is interrupted and the high voltage for the combustion of the fuel is produced in the secondary winding. In the electronic control circuit, a parallel circuit consisting of a first control coil, which has a resistor in series therewith, and a thyristor is connected from the base to the emitter of the switching transistor.

Abstract: An ignition system for an internal combustion engine wherein ignition timing is retarded when the engine speed exceeds a predetermined value. The ignition angle retardation is effected by an angle retarding circuit for by-passing at least part of an AC ignition signal. The angle retarding circuit is actuated responsive to an output of a phase-advanced signal generating circuit for generating an AC signal in advance in phase of the ignition signal. The utilization of the phase-advanced signal generating circuit enables the ignition angle to be varied over a wide angle.

Abstract: An igniter for the air/fuel mixture used in the cylinders of an internal combustion engine employs a conventional spark to initiate the discharge of a large amount of energy stored in a capacitor. A high current discharge of the energy in the capacitor switched on by a spark discharge produces a plasma and a magnetic field. The resultant combined electromagnetic current and magnetic field force accelerates the plasma deep into the combustion chamber thereby providing an improved ignition of the air/fuel mixture in the chamber.

Abstract: A constant duration and level of spark is obtained over a wide range of engine speeds in an ignition circuit, including a gate-turn-off device having a main current path connected in series with the primary winding of an ignition coil. An operating voltage is selectively applied, in timed relation to the operation of the internal combustion engine, to an LC resonant circuit for shocking the resonant circuit into oscillation. These oscillations are applied to the gate electrode of the gate-turn-off device, turning the gate-turn-off device off and on each successive half cycle, for inducing a relatively high level spark voltage in the secondary winding of the ignition coil.

Abstract: Circuit for producing turn-on signal for a silicon controlled rectifier (SCR), which signal abruptly and automatically returns to a lower level at which the SCR can commutate off upon reversal of its anode voltage. When a switch opens, a capacitor starts to charge and when the charge reaches a given level, a normally reverse biased transistor turns on. In response to the turn on of the transistor, a turn-on signal is applied via a second capacitor to the gate electrode of the SCR. After a short interval, a second transistor responsive to base current flow through the first transistor, clamps the gate electrode of the SCR to said lower level. After turn off of the SCR, the switch closes and the second capacitor discharges through a circuit including the gate-to-cathode path of the SCR, reverse biasing the gate of the SCR and holding the latter off.

Abstract: An ignition system comprises first and second series supply circuits including an ignition coil having a primary winding and a set of breaker contacts serially connected to said primary winding of said ignition coil, said first and second sets of breaker contacts having different opening times. A thyristor is connected in at least one of the two circuits. A firing signal is applied to the thyristor in accordance with the mode of operation of an associated engine, to enable the conduction of said thyristor in a first ignition mode being effected by said first and second sets of breaker contacts and in a second ignition mode being effected by either one of said first and second sets of breaker contacts.

Abstract: A breakerless condenser discharge ignition system for an internal combustion engine and excited by a rotating permanent magnet, consists of a single module, containing a number of windings and electrical components, mounted on one pole of a ferromagnetic core for producing high voltage output pulses for firing an associated spark plug.

Abstract: An ignition system for an internal combustion engine having an AC generator comprises an ignition coil energized by an AC output from the generator. A first thyristor is connected in series with the primary of the ignition coil and permits and interrupts the current through the primary. The first thyristor is turned on at a first angle in advance of ignition. A capacitor is charged by an AC output from the generator, and is discharged when a second thyristor conducts to apply a reverse voltage across the anode and cathode of the first thyristor. The second thyristor is triggered at a second angle.

Abstract: The current through the main conduction path of a gate-turn-off silicon controlled rectifier (GTO) charges a capacitor in the cathode circuit of the rectifier. The GTO is turned off by providing a discharge path for the capacitor via the cathode-to-gate electrode of the GTO. A diode in the charging path of the capacitor becomes back-biased during discharge of the capacitor, thereby preventing the load in the cathode circuit of the rectifier from bypassing any of the discharge current.

Abstract: The visibility of warning lights employing flash tubes is enhanced by control circuitry which generates closely spaced trigger pulse pairs for energizing the tubes to thereby produce double flashes. Noticeability of the warning light may be enhanced by addition thereto of a noise maker which operates off the same power supply that provides a high voltage for operating the flash tube or tubes.

Abstract: A solid state ignition system particularly adapted for use in igniting fuel oil, the system including plasma generator means, electronic trigger means and electronic brake means and being effective to produce an improved ionization arc between electrodes for the purpose of initiating fuel oil combustion.

Abstract: A capacitance discharge type breakerless ignition system for an internal combustion engine, comprising ignition coil means including a main and an auxiliary primary coils and a secondary coil, capacitance means including two capacitances connected to said main and auxiliary primary coils, respectively to be charged by a charging voltage and at least one ignition plug connected to said secondary coil, time constants of said connections of said main primary coil and said corresponding capacitance and of said auxiliary primary coil and said corresponding capacitance when said capacitances are simultaneously discharged through said main and auxiliary primary coils being different from each other whereby said ignition plug is sparkingly discharged for a longer continuation time.

Abstract: This invention relates to a method for preventing premature ignition in an ignition device for the internal combustion engine including a non-contact type ignition circuit for the internal combustion engine, particularly an ignition circuit for the internal combustion engine in which an inductive current in the form of an AC waveform induced in a primary winding of an ignition coil is controlled in its conduction and cut-off by means of a transistor circuit, various auxiliary circuits to be disposed for a desired performance in accordance with the purpose of use and the rate of this circuit, and an ignition circuit for the internal combustion engine in accordance with the present invention, and more particularly to a method for preventing premature ignition in an ignition device for the internal combustion engine comprising a transistor circuit for controlling in conduction and cut-off of a primary short-circuit current in the whole circuit and a trigger circuit for controlling the trigger in said transistor

Abstract: A pulse generating system especially adapted for use in ignition systems of internal combustion engines including a solid state pulse triggering circuit for controlling spark timing and in which the timing is advanced with increased engine speed and can be changed independently of engine speed by a voltage biasing means. The triggering circuit can be programmed to provide any desired spark timing and can be controlled in response to a condition, such as engine fuel, temperature, pressure or other parameter.

Abstract: A signal generator for use in a breakerless ignition system for an internal combustion engine, comprising a magnet rotor rotatable in synchronism with said internal combustion engine and a stator including a plurality of signal coils and a comb-like magnetic core member disposed adjacent to said rotor and having a plurality of teeth-like core portions around which said signal coils are wound, respectively, and a common yoke magnetically connected to said core portions, said signal coils constructed so that incremental voltages are established thereacross from the most advanced position toward the most retarded position and said signal coils divided into at least two series connections of at least alternate signal coils. Each series connection of signal coils has a diode connected in series to the corresponding series connection and the series connections of signal coils are arranged in a parallel manner.

Abstract: In one embodiment, a capacitive discharge ignition system has a charge coil and an ignition coil including primary and secondary windings wound on a common stator structure. The charge coil is coupled to the primary winding of the ignition coil by an SCR and a main capacitor such that the capacitor is first charged by the charge coil and then discharged through the SCR into the primary winding of the ignition coil when the SCR fires. During discharge of the capacitor, the charge coil also supplies current to the primary winding of the ignition coil. The SCR may be fired by a triggering circuit which includes a capacitor network connecting the gate of the SCR to the charge winding and main capacitor or through a breakdown effect of the SCR absent the provision of a triggering circuit. The circuit arrangement obviates the need for the usual charging diode between the charging coil and the main capacitor. Several embodiments of triggering circuit for the SCR are disclosed.

Abstract: Solid state ignition circuitry for transmitting impulse voltages, produced by .[.a.]. magneto .Iadd.means .Iaddend.associated with an internal combustion engine, to a transformer, which, in turn, generates a high voltage impulse to produce sparks in the spark plugs of the engine. The circuitry includes two silicon controlled rectifiers adapted to control the discharge of a capacitor through the transformer. The capacitor charges during one part of a given time period, e.g., the positive half cycle of alternating current produced by the magneto, and the silicon controlled rectifiers are adapted to discharge the capacitor during the other part of such time period, e.g., the negative half cycle of such current. The particular instant at which the capacitor discharges can be varied by .Iadd.adjustable .Iaddend.means .Iadd.for applying controlled input voltages to the control electrodes of .[.of a potentiometer, which is associated with.]. the silicon controlled rectifiers.