AID IN MECHANICS Russian patent published in 1996 - IPC

FIELD: training aids. SUBSTANCE: aid in mechanics relates to visual aids. Known aid includes self-oscillation system incorporating physical pendulum with permanent magnet fixed on its end, electromagnetic valve with two inductance coils placed on one core for magnetic interaction with permanent magnet and power supply source connected to leads of electromagnetic valve mounted on one base. This known aid has low demonstration capabilities. Thus invention is aimed at removal of given demerit. Nature of invention is described by drawings: drawing 1 presents external view of aid and drawing 2 presents schematic diagram of electromagnetic valve. Aid presented in dwg 1 includes permanent magnet 1 attached to lower end of pendulum 2 which rotational axle is fixed in passive base 4 with the aid of holder 3. Suspension 5, electromagnet 6 incorporating two windings connected to electronic unit 7, power supply source 8 and sound indicator 9, for instance dynamic loudspeaker, are attached to base. Core of electromagnet is located close to permanent magnet of pendulum placed into equilibrium position. Dwg 2 presents one of possible variants of schematic diagram of electromagnetic valve 10. It incorporates electromagnet with windings 11, 12, transistors 13, 14, diode 15 and dynamic loudspeaker 16. EFFECT: easy-to-grasp demonstrations.