Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1990-12-05
1992-04-21
Stephan, Steven L.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
361104, 337187, 337198, 318 16, 318139, H02H 709
Patent
active
051073870
ABSTRACT:
A controller includes a circuitboard with a circuit for variably coupling power from a battery to the drive motor of a radio controlled model. The circuit has positive and negative input terminals for connection to the battery and an output port for connection to the motor. The circuit also includes braking componentry that produces a low resistance path in parallel with the motor in order to brake the motor under operator control, and the circuit includes a fuse in series with the braking componentry for protecting it from damage in the event the input terminals are connected to the battery with the polarity reversed. An inventive fuse is disclosed that may be used with the controller or elsewhere. The fuse includes a conductive element of predetermined current rating and first and second connectors connected to the conductive element that are configured to plug onto first and second terminal posts with interference fits so that any component fatigue is substantially restricted to the fuse. The fuse may be fabricated from separate interconnected components or take the form of a sheet of conductive material that has been stamped and rolled or otherwise shaped into a fuse element. The fuse element may snap into a housing that facilitates handling.
REFERENCES:
patent: 4164726 (1979-08-01), Weibe
patent: 4305030 (1981-12-01), Lorenz
patent: 4406982 (1983-09-01), McClellan
patent: 4450397 (1984-05-01), Painter
Berhane Adolf
Hanson Loyal M.
Stephan Steven L.
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