GB190215777A - Improvements in Telephone Instruments. - Google Patents
Improvements in Telephone Instruments.Info
- Publication number
- GB190215777A GB190215777A GB190215777DA GB190215777A GB 190215777 A GB190215777 A GB 190215777A GB 190215777D A GB190215777D A GB 190215777DA GB 190215777 A GB190215777 A GB 190215777A
- Authority
- GB
- United Kingdom
- Prior art keywords
- breaking
- screws
- making
- telephone
- magnet
- 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
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
15,777. Brander, B. July 15. Telephones.-The magnet of a telephone is mounted so that the distance of the polepieces from the diaphragm can be adjusted ; there is also a arrangement for making and breaking the circuits. The adjustment of the magnet g, Figs. 4 and 5, is made by two pairs of screws c, f mounted on perpendicular diameters, the ends of the screws c pressing against the back of the casing d, Fig. 4, and the ends of the screws f being bolted to the back of the casing by lock-nuts, Fig. 5. Fig. 1 shows the method of making and breaking the speaking circuit. The suspending-ring r is connected to a spring s, and, when suspended, the weight of the telephone breaks contact with the spring t, thus breaking the speaking circuit. Signalling may be done by pressing the ring r and making contact at v. The Provisional Specification states that auxiliary pole-pieces made of thin iron plates may be used on the receiver.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190215777T | 1902-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190215777A true GB190215777A (en) | 1903-07-15 |
Family
ID=32155079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190215777D Expired GB190215777A (en) | 1902-07-15 | 1902-07-15 | Improvements in Telephone Instruments. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190215777A (en) |
-
1902
- 1902-07-15 GB GB190215777D patent/GB190215777A/en not_active Expired
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