GB191406097A - Improvements in or relating to Telephone Systems. - Google Patents
Improvements in or relating to Telephone Systems.Info
- Publication number
- GB191406097A GB191406097A GB191406097DA GB191406097A GB 191406097 A GB191406097 A GB 191406097A GB 191406097D A GB191406097D A GB 191406097DA GB 191406097 A GB191406097 A GB 191406097A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- receiver
- primary
- call
- relating
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
6097. Graham, E. A., and Rickets, W. J. March 10. Direct-call systems in which repeater coils M, M<1> are used, and a voice call is made, are arranged so that the primary winding P is connected in a closed circuit, or the secondary winding S is short-circuited during a call, iu order to reduce the inductance of the circuit. In the arrangement shown in Fig. 1, the primary P is placed in a closed circuit with or without a resistance r when the circuit of the transmitter T is open. In the form shown in Fig. 2, the secondary winding S<1> is shortcircuited over the switch U<1> so that a direct circuit is obtained across the leads a, b through the receiver R<1> for a voice call. The calling- circuit, shown in Fig. 3, passes through the receiver R<1> and over the contacts f<1>, e<1>. When the switch U' is actuated, the transmitter T' is connected to the primary P' and the receiver R' to the secondary S<1>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191406097T | 1914-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB191406097A true GB191406097A (en) | 1914-07-09 |
Family
ID=32582666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB191406097D Expired GB191406097A (en) | 1914-03-10 | 1914-03-10 | Improvements in or relating to Telephone Systems. |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR470382A (en) |
| GB (1) | GB191406097A (en) |
-
1914
- 1914-03-10 GB GB191406097D patent/GB191406097A/en not_active Expired
- 1914-04-01 FR FR470382A patent/FR470382A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR470382A (en) | 1914-09-08 |
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