Showing papers on "Magneto published in 1977"
Patent•
11 Aug 1977
TL;DR: In this paper, a transistorized magneto ignition system is presented, where the ignition instant is controlled by a threshold switch responsive to voltage generated by the magneto, the threshold being connected to a timing circuit which includes a resistance network therein, the resistance value of which is variable with respect to operating speed of the engine.
Abstract: To provide for electronically controlled spark advance of the ignition instant in a transistorized magneto ignition system, the ignition instant is controlled by a threshold switch responsive to voltage generated by the magneto, the threshold being connected to a timing circuit which includes a resistance network therein, the resistance value of which is variable with respect to operating speed of the engine The resistance network includes a R/C timing circuit which, as the speed of the engine increases, presents a respectively smaller resistance value to rapidly recurring signals from the magneto so that, effectively, the resistance value of the timing circuit controlling current flow through the threshold circuit is decreased, causing a shift in the ignition instant, the circuit being arranged to advance the spark with respect to upper dead center (UDC) position of the piston of the engine
17 citations
Patent•
25 Apr 1977TL;DR: The breakerless magneto device described in this paper has a rotor with a permanent magnet imbedded in the periphery thereof which acts in cooperation with the first and second magneto cores to generate a varying flux field in the cores.
Abstract: The embodiments of the breakerless magneto device disclosed herein have a rotor with a permanent magnet imbedded in the periphery thereof which acts in cooperation with the first and second magneto cores to generate a varying flux field in the cores. The first core has a first winding mounted thereon and the second core, which is mounted next adjacent the first core but insulated therefrom, has a second winding mounted thereon. The first winding therefore encompasses the first core, the second core, and the second winding. The second winding provides a trigger pulse to a solid state device which interrupts the current in the first winding, at or near its maximum value, thereby collapsing the flux field in the first core. This causes a high voltage to be induced in the secondary winding of the magneto coil which is applied to the spark gap for fuel ignition. Stable and proper spark timing is achieved with this device.
17 citations
Patent•
11 Oct 1977TL;DR: In this article, a magnetic reading head having a magneto-resistive element of the non-magnetically biased type is presented, in which the current is forced to flow through the element at an angle with the easy axis of magnetization.
Abstract: A magnetic reading head having a magneto-resistive element of the non-magnetically biased type, in which the current is forced to flow through the element at an angle with the easy axis of magnetization For adjusting the dynamic range of the element, the element is subjected to a variable strength auxiliary field having a direction of which is parallel to the easy axis of magnetization
13 citations
TL;DR: Ferrimagnetic garnet films in conjunction with photoconductor layers exhibit high optical recording sensitivities to be operated with economic low-power lasers as discussed by the authors, and a prototype of this composite material (MOPS) proves feasible for application in reversible, localized, random access storage devices with adequate storage capacity and data rates to compete with magnetic bubble shift registers and magnetic discs.
Abstract: Ferrimagnetic garnet films in conjunction with photoconductor layers exhibit high optical recording sensitivities to be operated with economic low-power lasers. A prototype of this composite material (MOPS) proves feasible for application in reversible, localized, random-access storage devices with adequate storage capacity and data rates to compete with magnetic bubble shift registers and magnetic discs.
9 citations
9 citations
Patent•
22 Feb 1977
TL;DR: An inductive, solid-state, magneto ignition system utilizing solidstate switching and operable at low speeds to facilitate starting is presented in this paper, where timing is controlled in response to current developed in the primary winding of the magneto coil.
Abstract: An inductive, solid-state, magneto ignition system utilizing solid-state switching and operable at low speeds to facilitate starting. Timing is controlled in response to current developed in the primary winding of the magneto coil, which automatically operates a solid-state switch to open the primary winding circuit of the magneto ignition when the current in the primary winding is at a predetermined level. The arrangement couples a high peak voltage and short rise time with a relatively long arc duration across an associated spark plug to increase the over-all performance of a magneto ignition system. In one embodiment, a spark advance is automatically provided as engine speed increases.
6 citations
Patent•
23 Mar 1977
TL;DR: In this paper, an ignition system for an internal combustion engine including a capacitor charged by charge power source, a thyristor for discharging the capacitor through the primary of an ignition coil and a magneto AC generator including a signal generating winding was described.
Abstract: Disclosed herein is an ignition system for an internal combustion engine including a capacitor charged by charge power source, a thyristor for discharging the capacitor through the primary of an ignition coil and a magneto AC generator including a signal generating winding for supplying a gate signal to the thyristor. The ignition system is characterized in that rate of change of the magnetic flux interlinked with the signal generating winding has at least two successive local maximum points, so that at least two successive peaks of the same polarity appears in the voltage induced in the signal generating winding by the magnetic flux variation. The waveform of the voltage induced is utilized for ignition angle advance.
5 citations
Patent•
26 Apr 1977
TL;DR: In this paper, a transmission gear of torque, where magneto serves to smooth the irregular rotation in a transmission system, is described, where the magneto is used to smooth irregular rotation.
Abstract: PURPOSE:A transmission gear of torque, where magneto serves to smooth the irregular rotation in a transmission system.
2 citations
TL;DR: In this article, the transverse Kerr effect and the Voigt effect are used to measure the in-plane magnetization of polycrystalline EuS films, which can be used to reveal important magnetic properties.
Abstract: The Europium chalcogenide films do not show a linear relation between the in-plane magnetization and the magneto-optical effects. The transverse Kerr-effect and especially the Voigt-effect offer the possibility for measuring the in-plane magnetization. These measurements can be used to reveal important magnetic properties of polycrystalline EuS films.
2 citations
TL;DR: In this paper, the magnetic structure and part of the magnetic phase diagram have been investigated using magneto-electric techniques, and the magnetic susceptibility close to T N has been measured, enabling the critical coefficients β and B to be evaluated.
Abstract: The magnetic structure and part of the magnetic phase diagram have been investigated using magneto-electric techniques. Measurements of the magneto-electric susceptibility close to T N have enabled the critical coefficients β and B to be evaluated.
Patent•
04 Feb 1977
TL;DR: In this article, a strong and simple contruction in a magnetic pole for a magneto power generator which is directly linked to the crank shaft of an internal combustion engine is presented.
Abstract: PURPOSE:To obtain a strong and simple contruction in a magnetic pole for a magneto power generator which is directly linked to the crank shaft of an internal combustion, thus simplifying and automatizing the assembly process to reduce production cost
01 Jan 1977
TL;DR: Magneto-electro-thermoelasticity describes the interaction of four fields in an elastic or viscoelastic solid: stress field, displacement field, temperature field and electromagnetic field as mentioned in this paper.
Abstract: Magneto-electro-thermoelasticity describes the interaction of four fields in an elastic or viscoelastic solid: stress field, displacement field, temperature field and electromagnetic field. There would be additional fields in an oriented medium, but little has been done so far to include effects of this kind in the theory, cf. [1] and [2].