International Business Machines Corporation

Charles A Farel

Karl H Brueckner

Paul Y Hu

William C Dodt

Nelson K Arter

Johnnie F Irsik

In a machine having a reciprocating original document handling carriage such as a copier, a roller at the bottom of a sloped ramp rests on the upper surface of the carriage. Documents placed on the ramp slide downward until the leading edge is at the nip between the roller and carriage surface. Movement of the carriage pulls the document from the tray onto the carriage surface for scanning. An additional roller can be included to provide automatic document ejection by pushing the document onto an output tray as the carriage returns.

Document feeder for moving bed machines such as copiers

The output voltage of a transformer is regulated by controlling the flow of magnetic flux through a shunt core. The transformer includes a main core fabricated from U-I laminations and is arranged to form a substantially rectangular structure. A primary and a secondary coil are seated on the main core. A shunt core with shunt winding having lamination size and structure substantially analogous to that of the main core is positioned in spaced alignment to said main core. A flux interconnecting path, called the bottleneck, connects the main core and the shunt core to form a sturdy unified structure. The shunt winding is activated by control circuitry by which the flux flow through the shunt core is limited and hence the output voltage is regulated.

Flux controlled shunt regulated transformer

The output voltage of a flux controlled transformer is regulated by controlling the magnetic flux flow in the main core of the transformer. This regulation is achieved by a magnetic structure which includes a main core with primary and secondary coils thereon; shunt cores symmetrically situated about the main core; and leakage paths symmetrically positioned about the main core so as to interconnect the main and shunt cores. In one configuration the leakage paths include magnetic laminations which are positioned perpendicular to the magnetic laminations which form the main and shunt cores. In another configuration the magnetic laminations are arranged in a trapezoidal configuration.

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Boulder, CO, United States of America

Charles A Farel