Abstract: Rotor of a magnetomotive device has a discrete permanent magnetic and a ferromagnetic core injection molded within a synthetic plastic body in the form of a flywheel. The core is of integral, laminar construction and includes hub and counterweight portions and a pair of radially extending, circumferentially spaced arm portion. At their outer ends, the arm portions terminate in pole shoes with opposed, undercut edges to retain the discrete permanent magnet therebetween. Each of the arm portions has a laterally extending shoulder portion and, at their inner ends, connect to the hub by narrow neck or stem portions which are resiliently flexible. From the center of rotation of the rotor, the stem portions are each disposed along a given radius.

Abstract: Time-delay circuit for automatic shutdown of furnace systems has an induced draft blower motor and a first circuit for providing energy to the blower motor from an energy source. A second circuit for energizing the primary control system of the furnace, includes a thermostat and an electronic switching means. When the thermostat is "closed", the second circuit is completed to energize the electronic switching element which starts the blower. An airflow switch is provided to sense the start of the blower and to thereby energize a primary control which provides gas to a burner of the furnace. A timer set to a predetermined time interval has an output and two input terminal connections, one connected to the output of the thermostat and another to the output of the primary control system. When the thermostat is "closed" and the burner is operating, the timer is disabled.

Abstract: Integral solenoid and starter motor having four or more poles for internal combustion engines has an electrically conductive disc carried by the armature or core of the solenoid for movement in response to energization and de-energization of the solenoid coil. Three stationary contacts of electrically conductive material are disposed in circumferentially spaced relation about the longitudinal axis of the core for sequential engagement by the movable disc. One of the stationary contacts, connected to an electrical energy source, is disposed at a position closer to the movable disc than the other stationary contacts. The other stationary contacts are connected in parallel circuits to two poles of the starter motor whereby each contact carries one-half the current supplied by the energy source. The disc is tiltably mounted on the core for making initial contact with the first stationary contact and later, with the two other contacts in response to the solenoid being energized.

Abstract: Capacitor charge ignition system includes a computer chip programmed to control ignition timing of the system. The system has a generator coil and primary and secondary windings of an ignition coil disposed on one leg portion of a ferromagnetic core. The generator coil is wound with respect to ground potential to provide positive pulses, one preceding and one following, in sequence, an intermediate pulse of negative polarity induced in the generator coil in response to rotation of permanent magnet poles past the one core leg. The positive pulses are supplied to a microprocessor which is programmed to determine the elapsed time between the pair of positive pulses and to provide an output signal which is a multiple function of the elapsed time. A capacitor is charged by the intermediate pulse so that its grounded side is changed to a positive polarity voltage which is connected in circuit with the primary winding of the ignition coil and with the anode/cathode path of a silicon controlled rectifier (SCR).

Abstract: Electronic control system for a gas-fired/hot air furnace includes a primary control unit which controls the flow of fuel to the furnace. The furnace has heating and cooling space thermostats and a comfort fan to supply heated or cooled air to the space being monitored by the thermostats and an induced draft blower which supplies combustion air into the furnace for heating. A first switch and associated relay drive selectively energizes the comfort fan for low speed heating operation and a second relay switch and associated relay drive selectively energizes the comfort fan for high speed cooling operation. Actuation of the heating thermostat energizes a third switch and associated relay drive which energizes the induced draft blower. A high temperature thermostat located to sense excessive furnace temperatures is also connected to actuate the third relay to energize the induced draft blower in an excessive temperature condition.

Abstract: Electronic control system for an oil burner has a primary direct current power source controlled by a thermostat and a secondary direct current power source independent of the thermostat. A first relay is in circuit with the oil burner motor to energize the same and a second relay is in series with the first and with an alternating voltage source for energizing the ignitor of the furnace. An electronic circuit controls the first relay switch and includes a pair of silicon controlled rectifiers (SCR's) connected in series for energizing the first relay. A second electronic circuit includes a pair of interconnected NPN transistors for controlling the operation of the second relay switch. The first NPN transistor is conductive when the second relay switch is energized and the second NPN transistor is connected to the first to turn "OFF" the same in response to flame being sensed in the furnace.

Abstract: Automatic reset for an unattended gas furnace has an induced draft blower motor energized by an electrical power source and with a first, normally "open", relay switch in circuit to control the operation of the blower motor. A burner control circuit, energized by a transformer coupled portion of the power source, has a room thermostatic switch, a second, normally "open", relay switch in series with the thermostatic switch and an air-flow switch operated by airflow in the furnace to connect the control circuit to the second power source when the blower is "on" and the thermostat is "closed", calling for heat. The second switch is connected to the control electrode of an electronic switching element to energize selectively a relay controller which, when energized, closes both the first and second relay switches to energize the blower motor and burner control circuit.

Abstract: A fault indicator light control circuit for a regulator controlled alternator/battery charging system has a first transistor connected with a light bulb in its conductive path to be turned "ON" when the transistor is conducting. Conduction of the transistor is controlled by a plurality of conductive paths connected to the base of the transistor and each path includes a Zener diode having a breakdown voltage substantially above the rated voltage of the battery. The conductive paths are connected to detect any one of a plurality of circuit operating defects, including a short in the silicon controlled rectifier (SCR) of a solid state regulator, an open SCR and a regulator failure. A capacitor is connected in the circuit to be charged by an alternator voltage having a polarity opposite that which is used to charge the battery. The capacitor voltage is used as a reference to bias the first transistor "OFF" when the system is operating normally.

Abstract: Mounting for ignition module in which a ferromagnetic flux carrying core includes a plurality of spaced, parallel leg portions. The ignition coil module has a generally central opening which is adapted to receive one of the core legs. A tapered slot is formed on one side of said coil module and is adapted to receive a correspondingly tapered bar portion of a synthetic plastic retainer. The retainer is an integral, thermoplastic block with a channel on the side opposite the tapered bar portion adapted to slide-fit about the inner edge portion of the core leg. A recess is provided in the leg of the core opposite the slot on said module. The retainer includes a frangible lug portion which is adapted to be displaced against the portion of the leg in which the recess is formed. Whereupon, when the lug is softened by ultrasonic energy, it flows into the recess and hardens therein while bonding to the contiguous portions of the retainer to fasten the module in fixed assembled relation on the core.

Abstract: An alternator or generator core attachment is provided for connecting to a ferromagnetic coil of a magneto used in the ignition system of small combustion engines. The attachment includes a radially extending leg portion, on which a generator coil is wound, a cross bar portion and a flange adapted to be attached to one of the poles of the magneto core. By this construction, the pole of the magneto to which the flange is attached is integrated into a magnetic flux path with the radially extending leg and cross bar portion of the attachment.

Abstract: An oil burner ignition system includes a transformer primary winding feedback coil and dual secondary coil wound in axially coextensive and mutually coupled relation about a ferrite core. The primary winding and feedback coil are wound continuously about the core and disposed within a bobbin which supports the secondary coil. The primary and feedback coil have a common end connection in circuit with the emitter of a switching transistor. The other end of the feedback coil is connected through a capacitor and resistor circuit to the base of the transistor. The collector and base of the transistor are connected by a circuit to receive unipolar pulses of electrical energy. A resistor is connected between the base and the collector of the transistor to bias the transistor "on". The feedback coil is disposed to have voltage induced therein by changing current flow through the primary winding and the collector-emitter electrodes of the transistor.

Abstract: Mounting for ignition module in which a ferromagnetic flux carrying core includes a plurality of spaced, parallel leg portions. An ignition coil module has a generally central opening which is adapted to receive one of the core legs. One recess is provided on the outer surface of the module, and a second recess is provided in the core leg adjacent the one on which the module is disposed. The two recesses are oriented and dimensioned to form complementary portions of an opening adapted to receive a resiliently flexible retaining pin therein to fasten the module and core in assembled relation.

Abstract: An electronic, breakerless ignition system with a grounded cut-off switch has a transformer coil and an electronic ignition circuit in a unitary housing fitted on the core. In an inductive embodiment of the system, a trigger coil is in circuit with the base of a Darlington transistor to control the operation of the transistor in response to flux generated voltage in the trigger coil. The primary winding of the transformer coil has one ground connection and the trigger coil is connected to an entirely separate ground terminal. Each of the terminals is fastened at one end to spaced points on the core. In a capacitor discharge ignition embodiment, one end of the primary winding is connected to a ground terminal and a coil for charging the capacitor is connected at one end to a separate ground terminal.

Abstract: This application discloses a solid state ignition system of the inductive type and includes a trigger coil and an ignition coil having primary and secondary windings disposed on a stator core. A flux generating magnet is carried by a rotor to induce voltages in the coils. A Darlington transistor is disposed in circuit with the primary winding of the ignition coil with the collector emitter electrodes of the transistor connected to carry current generated in the primary of the ignition coil. The base of the transistor is connected to receive current pulses generated in the trigger coil. A parallel capacitor and resistor network is connected in circuit between the trigger coil and the base of the Darlington transistor. The capacitance of said capacitor and the resistance of the resistor are selected so that the retard angle of said system from low-to-high rotational speed of the flux generating magnet remains essentially constant.

Abstract: A full wave rectifier regulator for an alternator battery charging system has gate controlled rectifier connected in two separate branches of the rectifier bridge. The gates of the rectifiers are connected to the anode-cathode circuit of a third gate controlled rectifier (SCR) and are thereby selectively turned "on" and "off" by the current flow in the anode-cathode path of the SCR. A portion of the alternator output voltage triggers the SCR to its conductive mode whenever the battery voltage is between predetermined voltage levels. A protection circuit comprising an electronic switching component is connected to the gate of the SCR to shunt off any gate triggering current to hold the SCR "off". The switching component is connected to sense the battery voltage and to clamp "off" the SCR should its voltage either be lower or higher than the predetermined levels.

Abstract: Electronic shut-off circuit is provided in a capacitor discharge ignition system for internal combustion engines to protect against excessive high-speed operation. The circuit includes an electronic switching component connected across the main capacitor of the ignition system. A trigger coil is connected in circuit with a control electrode of the electronic switching component. The trigger coil is selected to generate a sufficient voltage to bias the switching means to its conductive state, thereby providing a low impedance shunt path to short the capacitor and to prevent it from discharging its energy into the primary of the ignition coil. A resistance-capacitance network, in circuit with the switching component, serves to hold it "on" until the engine is shut off.

Abstract: A breakerless magneto ignition system having a stator assembly including an ignition coil and core. A solid state gate turn-off switch (GTO) is connected by its anode-cathode electrodes in circuit with the primary winding of the ignition coil for conducting primary current. A solid state switching component is connected in circuit with the control electrode or gate of the GTO and with a capacitor which is charged by current generated in the primary winding in one direction as a result of magneto rotation. The stator assembly includes a trigger coil circumferentially spaced from a leg of the core of the ignition coil a distance approximately equal to the edge distance of the magneto to provide a trigger pulse.

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 pole-shoe magnet group assembly for a magnetomotive device such as a magneto for the ignition system of an internal combustion engine. The group carried by the rotor includes a permanent magnet and a pair of pole-shoes extending generally circumferentially from the magnet in opposite directions. A coil/core group for electromagnetic cooperation with the pole-shoe magnet group is disposed on the stator. The inner surface of each pole-shoe is defined by a circular arc having a center eccentric to the center of rotation of the rotor. The inner surfaces of the pole-shoes and the core of the trigger coil define an air gap or spacing which varies during rotation of each shoe relative to the core. The signal induced in the trigger coil by this construction inhibits unwanted firing of a solid state switching component and in a breakerless ignition in response to reverse rotation of the magnet pole-shoe group.

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.