GB1411549A - Automatic typewriters - Google Patents
Automatic typewritersInfo
- Publication number
- GB1411549A GB1411549A GB4583371A GB4583371A GB1411549A GB 1411549 A GB1411549 A GB 1411549A GB 4583371 A GB4583371 A GB 4583371A GB 4583371 A GB4583371 A GB 4583371A GB 1411549 A GB1411549 A GB 1411549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- type
- character
- bit
- printed
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J5/00—Devices or arrangements for controlling character selection
- B41J5/30—Character or syllable selection controlled by recorded information
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J7/00—Type-selecting or type-actuating mechanisms
- B41J7/02—Type-lever actuating mechanisms
- B41J7/30—Preventing rebound or clash of levers or type members
Landscapes
- Executing Machine-Instructions (AREA)
Abstract
1411549 Automatic typewriters DATAPLEX Ltd 18 Dec 1972 [1 Oct 1971] 45833/71 Heading G4H In an automatic typewriter the actuation of the type bars corresponding to any two successive characters to be printed is arranged to occur an interval of time a part which depends on their spatial separation in the type basket. Characters in an 8-bit code are input to a buffer store 16 from, e.g. a keyboard, a computer, a magnetic card or punched tape, each character in turn being transferred to an 8-bit shift register 20. The character in 20 is fed to a coding translator 24, then back to 20: it is now in the form of a 6-bit code indicating the sequential position of the type bar in the type basket plus an upper/lower case bit and a parity bit. This character is input to a further register 30 whence it is transferred to a decoder 12 and a control circuit 40 so that the type bar may be actuated; a sensor 14 provides a feedback signal to 40 when the type bar passes through a predetermined position. The output from 30 (representing the character currently being printed) and the next input thereto (the next character to be printed) are fed to a subtractor 34 which calculates the modulus of the difference in positions of the two type bars; if this is greater than three then the next type bar is actuated immediately upon receipt of the signal from 14, but if it is three or less then actuation is delayed so as to avoid interference between closely situated type bars. It is stated that this arrangement (distinguishing only between more than three and three or less) is the optimum one for obtaining increased speed of operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4583371A GB1411549A (en) | 1971-10-01 | 1971-10-01 | Automatic typewriters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4583371A GB1411549A (en) | 1971-10-01 | 1971-10-01 | Automatic typewriters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1411549A true GB1411549A (en) | 1975-10-29 |
Family
ID=10438775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4583371A Expired GB1411549A (en) | 1971-10-01 | 1971-10-01 | Automatic typewriters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1411549A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4207010A (en) * | 1978-07-17 | 1980-06-10 | Wernsing William O | Digital system for control of an electric typewriter |
US4490055A (en) * | 1982-06-30 | 1984-12-25 | International Business Machines Corporation | Automatically adjustable delay function for timed typamatic |
-
1971
- 1971-10-01 GB GB4583371A patent/GB1411549A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4207010A (en) * | 1978-07-17 | 1980-06-10 | Wernsing William O | Digital system for control of an electric typewriter |
US4490055A (en) * | 1982-06-30 | 1984-12-25 | International Business Machines Corporation | Automatically adjustable delay function for timed typamatic |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |