Showing papers on "Magneto published in 1975"

Non-incendive shut-down system for engine magnetos

Abstract: A shut-down system for an internal combustion engine having a magneto circuit which when grounded causes the engine to shut down. A normally open sensor switch responsive to some malfunction of the engine grounds the magneto circuit through an "indicator" circuit when the sensor switch closes. To avoid arcing with sufficient energy release to ignite flammable mixtures of gases or dust which might occur when ordinary switch contacts are operated, non-arcing solid state switches are used in those parts of the system which handle ignition levels of electrical energy and means are provided for reducing to non-ignition levels the electrical energy that is handled by ordinary switch contacts in the system. In addition, means may be provided to remove magneto primary voltage from the system for a short period of time while the engine is being started up so that the magneto circuit is not grounded by operation of the sensor switch before the engine reaches running conditions. The system can be extended to accommodate any number of indicator circuits and sensor switches. A "test without kill" feature may be added in order to test the integrity of the sensor switch wiring and the proper functioning of the overall system without killing the engine. Further, a hard-ground feature may be included in the event the impedance of a coil in the indicator circuit through which the magneto circuit is grounded is too high to effectively ground the magneto circuit. Also, a manual shut-down or "kill" switch may be included. In addition, a matrix arrangement for connecting various sensor switches and indicator circuits may be employed to reduce the number of indicator circuits required to identify uniquely four or more primary sensor points and to provide a redundant shut-down path should one of the indicator circuits fail.

Magneto-alternator with magneto energy limiting

Abstract: A magneto-alternator has a plurality of alternator coils for lighting or the like and a main ignition coil for a breaker-point ignition. Stator laminations are arranged so that the ignition coil is between two alternator coils and each coil is effectively on an E-shaped core with an outer leg of each E-shaped core being shared with an adjacent coil. The flywheel has a plurality of ceramic magnets having a high potential energy so that a high alternator output is developed. The center core leg of the E core on which the ignition coil is mounted has a large air gap relative to the air gaps at the other core legs to compensate for the high energy of the magnets and thereby limit current at the breaker points. The large air gap also makes the magneto output insensitive to production tolerances in the air gap.

Magnetic alloy for use in thermo and magneto printing

Abstract: Magnetic alloy containing platinum, cobalt and nickel is disclosed which is suitable for use with magnetic recording medium, especially for use with an intermediate magnetic recording medium in thermo and magneto printing.

Magneto ignition system for internal combustion engines

Abstract: To prevent operation of the engine in reverse direction of rotation, an auxiliary winding on the magneto is connected with the pulse source which provides ignition trigger pulses by an unsymmetrical conduction network, including diodes, which prevent application of trigger pulses from the pulse source to a control switch connecting an energy storage capacitor to discharge through the ignition coil, thus providing an ignition pulse, unless both the pulse source and the auxiliary winding provide, simultaneously, instantaneous output voltages of a predetermined polarity which is in direction to trigger the pulse source. Preferably, the auxiliary winding is formed as a tapped portion of the main magneto winding.

Method and apparatus for generating electricity magneto hydrodynamically

Abstract: Closed cycle energy conversion system in which a magnetohydrodynamic generator operates on high temperature and high pressure water obtained by combustion of hydrogen in oxygen which is obtained by thermal decomposition of water to produce electricity.

Magneto-thermo-elastic interactions in an infinite solid due to some time-dependent heat sources

Abstract: To determine the distribution of stress, strain, temperature, electric and magnetic fields in an infinite solid when it is subjected to a time-dependent heat source, is the aim of the present paper. The solutions have been achieved by means of Fourier and Laplace transforms.

ELECTROMAGNETIC WAVEPROPAGATIONIN A MAGNETO-PLASMA FILLEDCOAXIALSTRUCTURE:I, THEORETICALt

Abstract: Thisstudyis concernedwiththe problemof electromagneticwavepropagationin a magneto-plasma filledcoaxialstructure.Theproblemis formulated usingtheclassicalboundaryvalueproblemapproach. Basedon thisformulationan extensivenumericalinvestigation isperformed.Thenumericalinvestigation showstheexistenceof propagatingslowmodes,backward modes,a quasi-TEMmode,andwaveguide-type modesin a magneto-plasma filledcoaxialstructure.Dispersion curvesforthesedifferentmodesarepresented.The dependenceof the differentmodeson variousplasma parametersis considered.