GB328324A - Improvements in or relating to call recording apparatus for use in telephone systems - Google Patents
Improvements in or relating to call recording apparatus for use in telephone systemsInfo
- Publication number
- GB328324A GB328324A GB274829A GB274829A GB328324A GB 328324 A GB328324 A GB 328324A GB 274829 A GB274829 A GB 274829A GB 274829 A GB274829 A GB 274829A GB 328324 A GB328324 A GB 328324A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- armature
- wheels
- subscriber
- line
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
328,324. Pollak, J. E., (Associated Telephone & Telegraph Co.). Jan. 26, 1929. Automatic exchange systems.-A subscriber on 'leaving his telephone may operate a switch 1 to connect apparatus to the line by means of which a record of the incoming calls is made on a paper strip under the control of impulses dialled by the calling party and repeated at the exchange. When the line is called, ringing current from the exchange passes through relay 5, which attracts its light armature 9 and shunts condenser 7 in its circuit, thus simulating the reply of the subscriber, whereupon the ringing current is replaced by direct current and relay 5 energizes fully and attracts armature 10, which releases gear-wheel 32, strikes armature 9 and engages a locking pawl 38 so that both armatures are held operated independently of relay 5. Wheels 32, 33, 34 and 31 and the paper feed rollers are geared together, and the pair of wheels 31, 32 make a revolution in the same time, while wheel 34 rotates rapidly and by intermittent short-circuiting at contacts 22, 23 of coil 20 in the line circuit sends back an audible tone to notify the calling subscriber that the recording apparatus is ready to receive his number. Dialled impulses are now received by relay 5, the armature 26 of which carries a stylus 29 for making a record of the number on the paper strip 30. After wheels 31, 32 have made a complete revolution, cam 35 strikes locking pawl 38, opening contacts 17, 18 to release relay 5 in case the calling subscriber has not hung up; and allowing armature 10 to fall back and stop the rotation of the gear-wheels and the paper feed rollers. In a modification, a sluggish relay is employed in the line circuit in series with a separate impulse-responding relay, and the apparatus for locking armature 10 is then unnecessary.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE358558D BE358558A (en) | 1929-01-26 | ||
GB274829A GB328324A (en) | 1929-01-26 | 1929-01-26 | Improvements in or relating to call recording apparatus for use in telephone systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB274829A GB328324A (en) | 1929-01-26 | 1929-01-26 | Improvements in or relating to call recording apparatus for use in telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB328324A true GB328324A (en) | 1930-04-28 |
Family
ID=9745134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB274829A Expired GB328324A (en) | 1929-01-26 | 1929-01-26 | Improvements in or relating to call recording apparatus for use in telephone systems |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE358558A (en) |
GB (1) | GB328324A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3029661A1 (en) * | 1980-08-05 | 1982-03-04 | Siemens AG, 1000 Berlin und 8000 München | Visual identification of called and calling numbers - is initiated by subscriber equipment and transmitted directly over connecting telephone line |
-
0
- BE BE358558D patent/BE358558A/xx unknown
-
1929
- 1929-01-26 GB GB274829A patent/GB328324A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3029661A1 (en) * | 1980-08-05 | 1982-03-04 | Siemens AG, 1000 Berlin und 8000 München | Visual identification of called and calling numbers - is initiated by subscriber equipment and transmitted directly over connecting telephone line |
Also Published As
Publication number | Publication date |
---|---|
BE358558A (en) |
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