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Constant Energy Driver Disclosure Number: IPCOM000067457D
Original Publication Date: 1979-Aug-01
Included in the Prior Art Database: 2005-Feb-20

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Beavers, JA Kovach, PS [+details]


This circuit uses a closed-loop system concept to control the energy and the drive coil of an electromagnetic operator mechanism of the type used for driving a print hammer. No compensation for voltage or temperature variation is needed. Print registration for different forms factors can readily be adjusted. Fire time is no longer controlled by external systems since the coil time-energy relationship is now controlled by the driver.