GB406703A - Improvements in telegraph keyboard controlled apparatus - Google Patents
Improvements in telegraph keyboard controlled apparatusInfo
- Publication number
- GB406703A GB406703A GB24497/32A GB2449732A GB406703A GB 406703 A GB406703 A GB 406703A GB 24497/32 A GB24497/32 A GB 24497/32A GB 2449732 A GB2449732 A GB 2449732A GB 406703 A GB406703 A GB 406703A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- shift
- bars
- tooth
- engages
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
- H04L17/02—Apparatus or circuits at the transmitting end
- H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input From Keyboards Or The Like (AREA)
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
Abstract
406,703. Selective perforating-machines. CREED & CO., Ltd., and GRIFFITH, R. G., Telegraph House, Croydon. Sept. 2, 1932, No. 24497. [Class 31 (ii).] In a keyboard apparatus for the transmission of current impulses to a line or the perforation of tape in accordance with the code elements of a signal, a series of permutation bars is set for the case-shift signal combination on depression of a shift lever, which, on release, effects the setting of the bars for the reshift signal. The keyboard mechanism is arranged so that, in the extreme positions of the case-shift lever, the permutation bars are free to be moved by the depression of any of the signal keys. On depression of the shift key lever 6, which is always out of engagement with the bars 1 ... 5, a tooth 14 on a T-shaped lever 12, pivoted on an extension of the shift lever, engages a tooth 16 on a pivoted actuating bar 8, which engages inclined cam faces on the bars 1 ... 5 to effect their setting for the shift signal. Before the lever has completed its normal downward movement, an extension 18 of the T-lever engages a stationary pin 20 through which the tooth 14 is rocked out of engagement with the bar 8 which under the action of a spring 23 moves out of operative relation with respect to the bars 1 ... 5. Simultaneously, a tooth 15 moves into an actuating position with respect to a projection 17 on the reshift actuating bar 9. On the release of the key lever 6, the bar 9 engages inclined notches in the underside of the bars 1 ... 5 and effects their setting for the reshift signal. When the key-lever approaches the limit of its upward travel, the extension 18 engages the pin 19 rocking the tooth 15 out of engagement with the projection 17, then allowing the bar 9 to be moved by the spring 23 out of engagement with the bars 1 ... 5. Simultaneously, the tooth 14 is rocked into an engaging position with respect to the tooth 16 on the bar 8. The shift-lever 6 may be operated and locked, or solely locked subsequent to its independent actuation, by a locking lever 7 carrying a pin 24 co-operating with a slot in one arm of a pivoted member 25, which engages a pin 26 to lock the shift-lever 6 in the depressed position. To remove the shift-lock, the key lever 6 is further depressed and the pin 26 rides on an inclined surface 27 to remove the member 25 out of engagement with the pin 24, whereupon the lever 7 returns to its normal position in which it permits the lever 6, on release, to return to its normal position. Specification 388,785, [Group XL], is referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24497/32A GB406703A (en) | 1932-09-02 | 1932-09-02 | Improvements in telegraph keyboard controlled apparatus |
US686217A US1974307A (en) | 1932-09-02 | 1933-08-22 | Case signaling mechanism for keyboard controlled telegraph apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24497/32A GB406703A (en) | 1932-09-02 | 1932-09-02 | Improvements in telegraph keyboard controlled apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB406703A true GB406703A (en) | 1934-03-03 |
Family
ID=10212587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24497/32A Expired GB406703A (en) | 1932-09-02 | 1932-09-02 | Improvements in telegraph keyboard controlled apparatus |
Country Status (2)
Country | Link |
---|---|
US (1) | US1974307A (en) |
GB (1) | GB406703A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB652113A (en) * | 1948-04-05 | 1951-04-18 | Creed & Co Ltd | Improvements in or relating to keyboard controlled telegraph apparatus |
US2574102A (en) * | 1949-09-13 | 1951-11-06 | Teletype Corp | Spreader device for selector devices |
US2742532A (en) * | 1952-09-11 | 1956-04-17 | Dualex Corp | Printer for communications systems |
NL256795A (en) * | 1959-10-14 | |||
US3306417A (en) * | 1964-05-04 | 1967-02-28 | Olivetti & Co Spa | Keyboard mechanism for generating code with selectable code member sets |
DE1235369B (en) * | 1964-07-30 | 1967-03-02 | Siemens Ag | Keypad for teleprinters for generating character fonts |
US3324985A (en) * | 1966-01-14 | 1967-06-13 | Ibm | Encoder |
DE1289866B (en) * | 1968-01-11 | 1969-02-27 | Standard Elektrik Lorenz Ag | Device for the automatic insertion of the type group change characters in hand-held transmitters of telex technology or the like. |
US3623588A (en) * | 1969-04-01 | 1971-11-30 | Bunker Ramo | Electronic keyboard with upper- and lower-case capability |
-
1932
- 1932-09-02 GB GB24497/32A patent/GB406703A/en not_active Expired
-
1933
- 1933-08-22 US US686217A patent/US1974307A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1974307A (en) | 1934-09-18 |
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