Class 318/536 - By field circuit making and/or breaking

Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter in which means are provided for physically
No. of patents: 4
Last issue date: 07/01/2008

Number	Title	Issue Date
7394629	Motor overload tripping system and method with multi-function circuit interrupter A technique is provided for controlling operation of motors of different sized or ratings. Components used to apply and interrupt current to the motors may be shared in control devices for the different motors. The components may include contactors or circuit interr...	07/01/2008
5598072	Regenerative braking circuit utilizing separately excited motor A separately excited DC motor system is arranged to provide operation in a smooth, continuous electrical retarding mode. A series contactor connects the motor armature to a DC power source and is controlled so as to immediately open upon sensing of a need...	01/28/1997
4165476	Low loss, resettable excitation control for an inductive load In a power control system in which a time ratio control power circuit regulates the average current in an inductive load by repetitively connecting and disconnecting the load and a d-c power source, a variable impedance is connected in parallel circuit re...	08/21/1979
4074175	Inductive load current measuring circuit A circuit for generating a signal proportional to the average current of an inductive load supplied from a supply of intermittent electrical power and having a free-wheeling path through which load current flows during periods in which the load is not con...	02/14/1978

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