GB190717704A - Improvements in Loud Speaking Telephone Apparatus. - Google Patents
Improvements in Loud Speaking Telephone Apparatus.Info
- Publication number
- GB190717704A GB190717704A GB190717704DA GB190717704A GB 190717704 A GB190717704 A GB 190717704A GB 190717704D A GB190717704D A GB 190717704DA GB 190717704 A GB190717704 A GB 190717704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- diaphragm
- lever
- magnet
- receiver
- 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
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
17,704. Marzi, D. April 25, [date applied for under Patents Act, 1901]. Telephones.-The diaphragm of an electromagnetic telephone receiver or transmitter is connected by a lever to a magnetic armature which vibrates between the poles of a magnet. The line coils may surround the magnet poles or, as shown in Figs. 3 and 4, they may surround the armature. In the receiver shown in Fig. 3, the vibrations of the armature 1, pivoted between the pole-pieces 11 of the magnet N, S and surrounded by the line coils 10, are transmitted in amplified form to the diaphragm 4 through the lever 3. In the transmitter shown in Fig. 4, the vibrations of the diaphragm are transmitted to the armature 1 through the amplifying-lever 15. The receiver may itself act as the calling-instrument.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT190717704X | 1907-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190717704A true GB190717704A (en) | 1908-03-26 |
Family
ID=32652377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190717704D Expired GB190717704A (en) | 1907-04-25 | 1907-08-02 | Improvements in Loud Speaking Telephone Apparatus. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190717704A (en) |
-
1907
- 1907-08-02 GB GB190717704D patent/GB190717704A/en not_active Expired
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