Ragen Precision Industries, Inc.

Hans Weigert

Frame location system for microfilm retrieval system. Frame address of desired frame is stored in first reversible counter having maximum count greater than the maximum possible number of frames in a roll of microfilm. Frame address of frame currently being viewed is stored in second reversible counter of same count capacity. A burst of pulses equal to capacity of both counters causes both to count up. First counter to overflow gates burst pulses into third reversible counter. Second counter to overflow terminates count in third counter. As microfilm moves, optical sensors sense frame identifying 'blips' on microfilm thereby reducing count in third counter and slowing film to halt when desired frame is in position at viewing station.

Frame location system

Analog display utilizing liquid crystal material and for being multiplexed wherein the segments (one group of electrodes) are arranged in groups opposite sectors (the counter electrodes) and wherein the segments in each group are disposed in a sequence opposite to the sequence in which the segments of the next adjacent group are disposed and, further, wherein a segment in each group corresponds to a segment in each other group and wherein all corresponding segments are electrically interconnected in a series connection. In timed sequence with the input signals applied to the sectors, input signals are applied to the segments in a first predetermined sequence with regard to a direction of display movement to be provided by the display, and alternately, the input signals are applied to the segments in an opposite sequence with regard to the direction of display movement whereby the display movement is in one continuous direction. The disposition of the segments in groups wherein the segments in adjacent groups are disposed oppositely, and the series connection of corresponding segments, permits the leads to the segments to be made by such techniques as evaporation, sputtering, photo-masking or etching by eliminating the cross-overs which are costly to accommodate. Still further, the analog display of the present invention provides a display having a minimum of input leads thereby greatly reducing the possibility of failure points since each input point is a potential failure point and each elimination of an input point is the elimination of a potential failure point.

Growing community of inventors

Woodcliff Lake, NJ, United States of America

Hans Weigert