Electrical transmission or interconnection systems – Electromagnet or highly inductive systems
Patent
1994-06-30
1996-07-16
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Electromagnet or highly inductive systems
307150, 320 2, 336DIG2, H01F 3800, H02J 700
Patent
active
055369790
ABSTRACT:
A system transfers electric power between two devices using a magnetic coupling and no electrical connections. Each device incorporates a magnetic core surrounded by a coil. When properly aligned the cores form a closed magnetic circuit whereby stray magnetic fluxes are substantially reduced. In the preferred embodiment, a base unit incorporates a substantially `C` shaped magnetic core surrounded by its respective coil. A portable detachable device, such as an electric toothbrush, incorporates a substantially linear shaped magnetic core surrounded by its coil. The linear shaped magnetic core and the portable device are configured to fit within a gap formed in the `C` shaped magnetic core forming a substantially closed magnetic circuit thereby. Stray magnetic fluxes are thus significantly reduced. Additionally, an apparatus deactivates the power to the coil in the base unit when the portable device is removed from the base unit or when the battery within the portable device is charged to a predetermined level.
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Haverstock Thomas B.
McEachern Alexander
Elms Richard T.
Shoop Jr. William M.
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