GB172321A - Improved calling apparatus for high frequency telegraphy - Google Patents
Improved calling apparatus for high frequency telegraphyInfo
- Publication number
- GB172321A GB172321A GB32365/21A GB3236521A GB172321A GB 172321 A GB172321 A GB 172321A GB 32365/21 A GB32365/21 A GB 32365/21A GB 3236521 A GB3236521 A GB 3236521A GB 172321 A GB172321 A GB 172321A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- impulses
- series
- contacts
- actuated
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
172,321. Ges. f³r Drahtlose Telegraphie. Dec. 4, 1920, [Convention date]. Selective distant control systems.-A selecting- device operated by wireless signals, and suitable for calling subscribers to a news-distributing system, comprises a number of resonance relays arranged in series so that when one is actuated by a group of impulses of a given frequency it switches in the next, ready for closure by the succeeding series of impulses of a different frequency, and so on until finally the calling-alarm is actuated. The contacts of an initial relay 20 are actuated in synchronism with the signal impulses. The first impulse energizes a magnet 18 to close the circuit of a slow-release relay 17, and thereby through contacts 29, 30 to energize a series of holding-magnets 13 .. 16. The contacts 9 .. 12 are then ready to be closed by the pendulums 5 .. 8. The magnet 1 is already energized, and the first series of impulses will swing the pendulum 5 until it rests in the position shown, closing the contact 9. This contact completes the circuit of the next magnet' 2, so that the pendulum 6 will be swung into position by the ensuing series of impulses to energize the magnet 3 and so on, until finally the magnet 23 withdraws a latch to sound the calling-bell 21 and so notify the subscriber. At the end of the message the armature 29 falls away, and springs return the contacts 9 .. 12 to their normal positions ready for the next call.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE172321X | 1920-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB172321A true GB172321A (en) | 1922-11-02 |
Family
ID=5689990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32365/21A Expired GB172321A (en) | 1920-12-04 | 1921-12-02 | Improved calling apparatus for high frequency telegraphy |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB172321A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2497656A (en) * | 1946-06-11 | 1950-02-14 | Gen Electric | Selective relay system |
US2547025A (en) * | 1947-05-23 | 1951-04-03 | Motorola Inc | Frequency selective calling system |
US2547023A (en) * | 1947-05-23 | 1951-04-03 | Motorola Inc | Selective calling system |
US2591937A (en) * | 1947-05-01 | 1952-04-08 | Automatic Elect Lab | Selective calling system |
US2600405A (en) * | 1946-03-18 | 1952-06-17 | Conrad H Hoeppner | Selective communication system |
US2602853A (en) * | 1947-08-07 | 1952-07-08 | Bell Telephone Labor Inc | Selective signaling system |
-
1921
- 1921-12-02 GB GB32365/21A patent/GB172321A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2600405A (en) * | 1946-03-18 | 1952-06-17 | Conrad H Hoeppner | Selective communication system |
US2497656A (en) * | 1946-06-11 | 1950-02-14 | Gen Electric | Selective relay system |
US2591937A (en) * | 1947-05-01 | 1952-04-08 | Automatic Elect Lab | Selective calling system |
US2547025A (en) * | 1947-05-23 | 1951-04-03 | Motorola Inc | Frequency selective calling system |
US2547023A (en) * | 1947-05-23 | 1951-04-03 | Motorola Inc | Selective calling system |
US2602853A (en) * | 1947-08-07 | 1952-07-08 | Bell Telephone Labor Inc | Selective signaling system |
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