US3555186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key-operated teleprinter
Assignee: Hasler AG
•
Filing: 1968-04-25
•
Granted: 1971-01-12
•
Expires: 1988-04-25
Abstract
Abstract Key-operated teleprinter for the transmission of code symbols by the start-stop method, wherein each key triggers a further bit which has a first value and a second value for letters and numerals respectively, the bit combination and further bit being supplied to a reserve store adapted to store same and a master clock for controlling transmission of said bit combinations and associated further bits from the reserve store to the transmitter sotre, also for controlling the output circuit which transmits the bit combination to the transmission of a bit combination to said line if the further bit transmitted together with the bit combination is different from that transmitted with the preceding bit combination and means for producing an operating character for shifting the receiver from letters to numerals or vice versa.
Inventors
- 👤 Adrian Allemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
241 words
A keyboard-operated teleprinter for the transmission of code symbols by the start-stop method, with a full keyboard, with an electronic transmitter store for storing the bits which form the code symbols and an output circuit for the successive transmission of the stored bits to a transmission line, wherein in addition to triggering the bit combination which represents the character, each key triggers a further bit which has a first value for all letters and a second value for all numerals, the said bit combination and the said further bit being supplied to a reserve store which is adapted to store at least one bit combination and the associated further bit, and a master clock which controls the transmission of the bit combination and of the associated further bit from the reserve store into the transmitter store and controls the output circuit for transmitting the bit combination from said transmitter store to the transmission line, and means adapted to temporarily block the transmission of a bit combination to the transmission line if the aforementioned further bit, transmitted together with the bit combination, has a value which is different from that of the further bit transmitted with the preceding bit combination and, depending on said different value, produces an operating character for shifting the receiver from letters to numerals or numerals to letters respectively, transmits said operating character to the transmission line and then releases the temporarily blocked transmission of the bit combination.
Claim 2
Dependent Claim
241 words
A keyboard-operated teleprinter for the transmission of code symbols by the start-stop method, with a full keyboard, with an electronic transmitter store for storing the bits which form the code symbols and an output circuit for the successive transmission of the stored bits to a transmission line, wherein in addition to triggering the bit combination which represents the character, each key triggers a further bit which has a first value for all letters and a second value for all numerals, the said bit combination and the said further bit being supplied to a reserve store which is adapted to store at least one bit combination and the associated further bit, and a master clock which controls the transmission of the bit combination and of the associated further bit from the reserve store into the transmitter store and controls the output circuit for transmitting the bit combination from said transmitter store to the transmission line, and means adapted to temporarily block the transmission of a bit combination to the transmission line if the aforementioned further bit, transmitted together with the bit combination, has a value which is different from that of the further bit transmitted with the preceding bit combination and, depending on said different value, produces an operating character for shifting the receiver from letters to numerals or numerals to letters respectively, transmits said operating character to the transmission line and then releases the temporarily blocked transmission of the bit combination.
Claim 3
Dependent Claim
23 words
A teleprinter according to claim 1 having blocking means which blocks the aforementioned system when the bit combination corresponds to an operating character.
Claim 4
Dependent Claim
44 words
A teleprinter according to claim 1, wherein the reserve store is a register in which the first bit combination transmitted into the empty register and the further bit associated therewith is store in a register step disposed nearest to the output of the register.
Claim 5
Dependent Claim
128 words
A teleprinter according to claim 1 including a repeating system for the automatic and continuously repeated transmission of any desired character, triggered by depressing a repeat button wherein operation of the repeat button sets a flip-flop in a condition in which it blocks transmission of a bit combination and of the associated further bit from the reserve store into the transmitteR store but not prior to the end of the transmission of a bit combination to the transmission line, furthermore causes the continuously repeated transmission of the bit combination stored in the transmitter store and is reset into its inoperative position after releasing the repeat button but not before the end of transmission of a bit combination to the transmission line, whereupon the continuously repeated transmission is terminated.
References Cited (Backward Citations)
US3162725A
Cited
US3296369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |