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US4400697A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of line buffer loading for a symbol generator

Assignee: CHRON Corp
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Filing: 1981-06-19
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Granted: 1983-08-23
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Expires: 2001-06-19
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Abstract

Abstract In a symbol-display system which includes a keyboard for entering codes related to the symbols to be displayed and a memory for storing the codes associated with a line of symbols to be displayed, the symbols being from a font which includes at least one character represented by a set of symbols wherein the actual symbol to be used of the set is determined by the presence or absence on the displayed line of a space symbol immediately adjacent the character, there is disclosed the method of loading the codes in the memory for the display of a line of symbols by providing the keyboard with a key for each character that may be displayed as one of the symbols of the associated set wherein each of the keys represents a base symbol of the set, generating when one of the keys is depressed a base coded-combination of bits and modifying the base coded-combination of bits by changing at least one of the two least significant bits when any immediately adjacent key generated character is a space symbol.

Inventors

  • 👤 Glenn E. Currie
  • 👤 Erika Fremed

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 12:16
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/22; G09G5/24; G09G5/246

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 188 words
In a symbol-display system which includes a keyboard for entering indicia related to the symbols to be displayed and a memory for storing the indicia associated with a line of symbols to be displayed, the symbols being from a font which includes at least one character represented by a set of symbols wherein the actual symbol to be used of the set is determined by the presence or absence on the displayed line of a space symbol immediately adjacent the character, the method of loading said indicia in the memory for the display of at least a line of symbols comprising the steps of providing the keyboard with at least a key for each character that may be displayed as one of the symbols of the associated set, each of said keys representing a base symbol of the set, generating when one of said keys is depressed a base coded-combination of bits, modifying said base coded-combination of bits by changing at least one of the bits in two specific bit positions of said base coded-combination of bits when any immediately adjacent key generated character is a space symbol.
Claim 2
Dependent Claim 188 words
In a symbol-display system which includes a keyboard for entering indicia related to the symbols to be displayed and a memory for storing the indicia associated with a line of symbols to be displayed, the symbols being from a font which includes at least one character represented by a set of symbols wherein the actual symbol to be used of the set is determined by the presence or absence on the displayed line of a space symbol immediately adjacent the character, the method of loading said indicia in the memory for the display of at least a line of symbols comprising the steps of providing the keyboard with at least a key for each character that may be displayed as one of the symbols of the associated set, each of said keys representing a base symbol of the set, generating when one of said keys is depressed a base coded-combination of bits, modifying said base coded-combination of bits by changing at least one of the bits in two specific bit positions of said base coded-combination of bits when any immediately adjacent key generated character is a space symbol.
Claim 3
Dependent Claim 33 words
The method of claim 1 wherein said base coded combination of bits are zero bits and said modifying is accomplished by adding binary 1 and or 2 to said base combination of bits.

References Cited (Backward Citations)

US3513968A Cited
US3569951A Cited
US3665450A Cited
US3946407A Cited
JPS54124935A Cited
JPS54124937A Cited
US4298773A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-08-22 1987-02-21 1987-08-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-08-22 1991-02-21 1991-08-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-08-22 1995-02-21 1995-08-23 $7700.00 Window Closed / Lapsed

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