Title:
VARIABLE MESSAGE DISPLAYS
United States Patent 3493957


Abstract:
1,194,044. Shift register. W. BROOKS. 9 June, 1967 [13 June, 1966], No. 50007/68. Divided out of 1,194,042. Heading G4C. An electronic shift register comprises two bus lines, and each stage comprises a silicon controlled rectifier connected across the bus lines and two capacitors in series across the bus lines, the silicon controlled rectifier of each stage except the first being triggered by the second capacitor of the preceding stage in response to removal and reapplication of potential at the bus lines. The disclosure is included in Specification 1,194,042, except that the lamps in the latter are replaced by resistors.



Inventors:
Brooks, William
Application Number:
US3493957DA
Publication Date:
02/03/1970
Filing Date:
06/13/1966
Assignee:
William, Brooks
Primary Class:
International Classes:
G09G3/04; G09G3/20; G11C19/06; G11C19/28; (IPC1-7): G09B13/00; H05B39/00
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