US3593658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed printing system with continuously rotating font wheel
Assignee: Telecom Italia SpA
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Filing: 1969-07-01
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Granted: 1971-07-20
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Expires: 1989-07-01
Abstract
Abstract A teleprinter responsive to binary code combinations includes a continuously rotating font wheel with 51 peripherally equispaced typefaces and, synchronized with it, a reference wheel with 51 peripherally spaced alphanumerical markings respectively assigned to these typefaces and with 9 nonalphanumerical markings interspersed with the former. A sensor generates counting pulses in response to successive markings and steps a binary counter whose setting is fed to a comparator also receiving code combinations or ''''words'''' stored in a register in response to incoming message signals. Upon detecting a match, the comparator trips a striker successively confronted by the typefaces of the font wheel, operation of this striker being inhibited during periods in which counting pulses are generated by nonalphanumerical markings.
Inventors
- 👤 Auro Artom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:14
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/16; H04L17/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
290 words
A printing system for reproducing alphanumerical characters in response to incoming binary code combinations interleaved with code combinations of a nonalphanumerical nature, comprising: a font wheel provided with a set of typefaces equispaced along its periphery, said typefaces corresponding to alphanumerical characters represented by respective code combinations; a reference wheel coupled with said font wheel for synchronous rotation; drive means for continuously rotating said wheels at substantially constant speed; striker means adjacent said font wheel operable to print a character, represented by a confronting typeface, on a recording medium; sensing means adjacent said reference wheel, the latter being provided with a set of markings equispaced along its periphery and with at least one further marking interposed between said equispaced markings, the number of said equispaced markings equaling the number of said typefaces, said sensing means being responsive to passage of any of said markings for generating a countIng pulse; a binary counter connected to said sensing means for stepping by said counting pulses, said counter having an operating cycle equal to a revolution of said wheels; a binary register for temporarily storing incoming code combinations; comparison means connected to receive readings from said counter and said register and for generating a trigger pulse upon detecting a match therebetween; operating means for said striker means responsive to said trigger pulses; and blocking means connected to said sensing means for producing inhibiting signals to disable said operating means for predetermined periods in response to counting pulses generated by said equispaced markings, the duration of said inhibiting signals being a major fraction of the intervals separating successive counting pulses due to said equispaced markings whereby actuation of said printing means in response to said interposed marking, representing a nonalphanumerical code combination, is prevented.
Claim 2
Dependent Claim
290 words
A printing system for reproducing alphanumerical characters in response to incoming binary code combinations interleaved with code combinations of a nonalphanumerical nature, comprising: a font wheel provided with a set of typefaces equispaced along its periphery, said typefaces corresponding to alphanumerical characters represented by respective code combinations; a reference wheel coupled with said font wheel for synchronous rotation; drive means for continuously rotating said wheels at substantially constant speed; striker means adjacent said font wheel operable to print a character, represented by a confronting typeface, on a recording medium; sensing means adjacent said reference wheel, the latter being provided with a set of markings equispaced along its periphery and with at least one further marking interposed between said equispaced markings, the number of said equispaced markings equaling the number of said typefaces, said sensing means being responsive to passage of any of said markings for generating a countIng pulse; a binary counter connected to said sensing means for stepping by said counting pulses, said counter having an operating cycle equal to a revolution of said wheels; a binary register for temporarily storing incoming code combinations; comparison means connected to receive readings from said counter and said register and for generating a trigger pulse upon detecting a match therebetween; operating means for said striker means responsive to said trigger pulses; and blocking means connected to said sensing means for producing inhibiting signals to disable said operating means for predetermined periods in response to counting pulses generated by said equispaced markings, the duration of said inhibiting signals being a major fraction of the intervals separating successive counting pulses due to said equispaced markings whereby actuation of said printing means in response to said interposed marking, representing a nonalphanumerical code combination, is prevented.
Claim 3
Dependent Claim
52 words
The combination defined in claim 1 wherein said counter comprises a plurality of bistable stages, further comprising control means responsive to a predetermined setting of said counter for conditioning two of said stages for simultaneous switching by a counting pulse whereby the counter skips several code combinations not assigned to alphanumerical characters.
Claim 4
Dependent Claim
51 words
The combination defined in claim 2 wherein the higher one of said two stages comprises a flip-flop with setting and resetting inputs, said control means including logical circuitry connected to receive the output of the lower one of said two stages for deriving therefrom a switching signal applied to said inputs.
Claim 5
Dependent Claim
19 words
The combination defined in claim 3 wherein said two stages are the first and second stages of the counter.
Claim 6
Dependent Claim
49 words
The combination defined in claim 4 wherein said counter has six stages, said logical circuitry including gate means connected to receive the outputs of the second, third, fourth and fifth stages for jointly switching said first and second stages in a set state of the second through fifth stages.
References Cited (Backward Citations)
US3158090A
Cited
US3463081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |