Harris Corporation

Cyberex, Inc.

James E Murray

Algirdas J Krygeris

Robert J Resch

A common bus energization system is disclosed with first and second bus conductors across which a plurality of individual loads may be connected in parallel. Each of the loads is inductive and is capable of operating on direct current, for example, universal or shunt field DC motors, permanent magnet motors, magnetic particle clutches, eddy current clutches, relays, solenoids and the like. Voltage source means is provided to supply a resultant voltage to the first and second bus conductors. This voltage source means includes first and second sources with the first source connected to supply a large, positive voltage on the first conductor and the second source connected to supply a negative voltage on the first conductor. These two voltage sources are alternated with the first source effective a greater period of time for a net average polarity of positive on the first conductor. Each load, such as a motor, has a controllable semi-conductor connected to it to control the current through the motor. If the motor has a locked rotor or for some reason fails to develop a counter e.m.f., this polarity reversal of the resultant voltage insures that all motor control semi-conductors will stop conducting and recover their forward blocking characteristics. The retriggering of each individual motor control semi-conductor individually controls the speed or other characteristic of each motor. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Plural motor drive system

A system for predetermining appropriate settings for the ink flow control devices of a printing press in dependence upon the average inked area in each of a plurality of image zones whose ink supply rate is controlled by a respective one of the ink flow control devices. An image-bearing member such as a lithographic printing plate is imaged onto an electronic camera tube where it is scanned. Electrical signals from the camera tube are integrated for each ink control zone and the resultant signals indicate the appropriate settings for the ink flow control devices, which can be remotely controlled. Spatial variations in illumination are compensated; output signals are automatically normalized.

Image scan and ink control system

A display apparatus for facilitating adjustment of a printing press displays several quantities related to the inking of the printing press in a display that is arranged to show a functional relationship between the quantities. The settings of a plurality of ink adjustment devices are shown in a linear array of setting displays that are arranged in the same order as the adjustment devices are arranged across the width of the press. Each setting display comprises a column of equally-spaced dots with an interpolation dot at the end of the column. In vertical alignment with and in appropriate lateral relationship with that display of settings, a further display is provided showing deviations of the printed ink density from set points representing proper ink density. Each deviation display corresponds to a lateral portion of the press whose printed ink density is controlled by the settings of those of the adjustment devices with whose setting display it is aligned.

Growing community of inventors

University Heights, OH, United States of America

James E Murray