GB543616A - Improvements in or relating to telegraph transmitting apparatus - Google Patents
Improvements in or relating to telegraph transmitting apparatusInfo
- Publication number
- GB543616A GB543616A GB1385740A GB1385740A GB543616A GB 543616 A GB543616 A GB 543616A GB 1385740 A GB1385740 A GB 1385740A GB 1385740 A GB1385740 A GB 1385740A GB 543616 A GB543616 A GB 543616A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- release
- key
- answer
- released
- 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
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/06—Answer-back mechanisms or circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
Abstract
543,616. Type-printing telegraphy. CREED & GO., Ltd:, and GRIFFITH, R. G. Sept. 4, 1940, No. 13851. [Class 40 (iii)] Telegraph apparatus comprising an answer-back and a release key, for controlling the transmission of a signal to release the answer-back at the distant station, is so arranged that the operation of the release key prevents the release of the local answer-back irrespective of whether the key is released or held operated. To this end the mechanism 66, 68, 97 shown in Fig. 3 of Specification 461,753 is modified as shown. The answer-back drum 59, instead of being released by a detent attached to the lever 66 which is rotated on the receipt of a " who-are-you " signal, is engaged by a pawl 68b pivoted at 88a and secured to a detent lever 68a normally engaged by the lever 66. When the release key 1a is depressed, latch 97b raises the lever 68a out of engagement with lever 66. Lever 68a is retained in this position by catch 100 engaging lug 102, so that movement of lever 66, due to the depression of the key 1a, does not release the answerback 59. This movement of lever 66 does however release the catch 100 and restores the latch 97b if the key 1a has been released, so that the next movement of lever 66, in response to a " who-are-you signal received from the other station, releases the answer-back.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR959146D FR959146A (en) | 1940-09-04 | ||
| GB1385740A GB543616A (en) | 1940-09-04 | 1940-09-04 | Improvements in or relating to telegraph transmitting apparatus |
| FR928816D FR928816A (en) | 1940-09-04 | 1946-04-01 | Telegraph transmission apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1385740A GB543616A (en) | 1940-09-04 | 1940-09-04 | Improvements in or relating to telegraph transmitting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB543616A true GB543616A (en) | 1942-03-05 |
Family
ID=10030635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1385740A Expired GB543616A (en) | 1940-09-04 | 1940-09-04 | Improvements in or relating to telegraph transmitting apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (2) | FR928816A (en) |
| GB (1) | GB543616A (en) |
-
0
- FR FR959146D patent/FR959146A/fr not_active Expired
-
1940
- 1940-09-04 GB GB1385740A patent/GB543616A/en not_active Expired
-
1946
- 1946-04-01 FR FR928816D patent/FR928816A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR928816A (en) | 1947-12-09 |
| FR959146A (en) | 1950-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB543616A (en) | Improvements in or relating to telegraph transmitting apparatus | |
| GB737149A (en) | Apparatus for transmitting signals recorded on a control form or tape | |
| US2147249A (en) | Telegraph transmitting apparatus | |
| GB406703A (en) | Improvements in telegraph keyboard controlled apparatus | |
| GB424534A (en) | Selector arrangement for direct call telephone systems | |
| GB502521A (en) | Improvements in or relating to transmitters for step-by-step telegraph systems | |
| US1939613A (en) | Printing telegraph system | |
| ES297483A1 (en) | Automatic uncoupling apparatus for a recorder/reproducer | |
| GB633752A (en) | Improvements in or relating to printing telegraph receivers | |
| GB636272A (en) | Improvements in or relating to fire alarm equipment | |
| GB710591A (en) | Teleprinter for automatic telegraph exchange systems | |
| GB423155A (en) | Improvements in keyboard impulse transmitters for use in teleprinting systems | |
| GB674245A (en) | Improvements in or relating to electrical telegraph systems | |
| GB348546A (en) | A new and improved impulse transmitter or sender for signalling systems, telephone systems and the like | |
| GB378507A (en) | Improvements in or relating to one-revolution clutch mechanism for telegraph apparatus | |
| US2554793A (en) | Radio telegraph system with direction control | |
| US500563A (en) | Signaling system | |
| GB391855A (en) | Improvements in or relating to telegraph printing and like selective apparatus | |
| GB382635A (en) | Improvements in or relating to manually-operable selecting switches for use in intercommunication telephone systems | |
| GB389725A (en) | Improvements in or relating to fire alarm street boxes or like signalling apparatus | |
| GB517487A (en) | Improvements in or relating to answer back devices associated with printing telegraph apparatus | |
| GB474407A (en) | Improvements in or relating to telegraph keyboard transmitters | |
| GB643153A (en) | Improvements in or relating to printing telegraph apparatus | |
| GB1021025A (en) | Fixed message generator for printing telegraph apparatus | |
| GB476956A (en) | Improvements in or relating to teleprinter keyboard transmitters |