GB302638A - Improvements in or relating to telephone circuits - Google Patents
Improvements in or relating to telephone circuitsInfo
- Publication number
- GB302638A GB302638A GB2467027A GB2467027A GB302638A GB 302638 A GB302638 A GB 302638A GB 2467027 A GB2467027 A GB 2467027A GB 2467027 A GB2467027 A GB 2467027A GB 302638 A GB302638 A GB 302638A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- transmitter
- receiver
- relating
- systems
- 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
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
302,638. Healey, P. B., and Telephone Manufacturing Co., Ltd. Sept. 19, 1927. Direct-call systems; systems for transmitting music &c.-A simple telephone circuit comprising a receiver, a transmitter and a battery in series is coupled to an external source of signals (such as wireless signals) by means of a capacity as in Fig. 1. In the case of a duplicated telephone circuit, when it is desired to render audible in each receiver the signals from the transmitter at the same station, as for example in aeroplanes, the circuits may be coupled together in this manner, as in Fig. 2. he arra.ngement of Fig. 4 shows these effects combined, The Provisional Specification refers to the use of an inductive coupling. Specification 137,367 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2467027A GB302638A (en) | 1927-09-19 | 1927-09-19 | Improvements in or relating to telephone circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2467027A GB302638A (en) | 1927-09-19 | 1927-09-19 | Improvements in or relating to telephone circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB302638A true GB302638A (en) | 1928-12-19 |
Family
ID=10215405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2467027A Expired GB302638A (en) | 1927-09-19 | 1927-09-19 | Improvements in or relating to telephone circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB302638A (en) |
-
1927
- 1927-09-19 GB GB2467027A patent/GB302638A/en not_active Expired
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