Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1998-09-15
1999-10-19
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
310 23, 310156, 74575, H01F 700
Patent
active
059695889
ABSTRACT:
A ratchet and ball magnetic index device having a drive motor plate with a top surface and a bottom surface. The drive motor plate contains at least one ball receiving recess on the periphery of the bottom surface of the drive motor plate. A permanent magnet armature is secured to the top surface of the drive motor plate and rotates freely around a rotor shaft. A sector motor rotates the armature and drive plate when turned on. A ratchet plate, attached to the rotor shaft, has a bottom surface and a top surface with a plurality of contours displaced in a circular direction around the circumference of the ratchet plate. Each of the contours has a flat plane connected to an incline plane which is connected to a vertical plane. At least one magnetically attractable drive ball is positioned between the top surface of the ratchet plate and the bottom surface of the drive motor plate, wherein the drive ball moves freely within the ball receiving recess. A plurality of permanent magnets are positioned between the top surface and the bottom surface of the ratchet plate and located beneath each of the flat planes. When the drive motor plate rotates, the drive ball grips the ratchet plate and rotates it in the same direction. As the ratchet plate is secured to the rotor shaft, anything connected to the rotor shaft is similarly rotated. The presence of the magnets allows reliable operation in a variety of environments, including space.
REFERENCES:
patent: 3761851 (1973-09-01), Nelson
patent: 3827308 (1974-08-01), Brown
patent: 3970980 (1976-07-01), Nelson
patent: 4617538 (1986-10-01), Nelson
patent: 5293144 (1994-03-01), Krimmer
patent: 5642086 (1997-06-01), Nelson
Ingenious Mechanisms for Designers & Inventors vol. I, Industrial Press .COPYRGT.1930 NYC pp. 28-51 (no month).
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