GB191322157A - Improvements in or relating to Telephone Transmitting Apparatus. - Google Patents
Improvements in or relating to Telephone Transmitting Apparatus.Info
- Publication number
- GB191322157A GB191322157A GB191322157DA GB191322157A GB 191322157 A GB191322157 A GB 191322157A GB 191322157D A GB191322157D A GB 191322157DA GB 191322157 A GB191322157 A GB 191322157A
- Authority
- GB
- United Kingdom
- Prior art keywords
- microphones
- diaphragms
- diaphragm
- bolts
- electrodes
- 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
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
22,157. Foote, A. H. Oct. 1. Telephones, mounting and supporting.-Microphones are mounted with their diaphragms in parallel planes, and so that the axis of the sound waves is normal to the line joining the microphones. A handle C, Fig. 1, bears a bracket B carrying two microphones A, the position of which can be adjusted laterally by means of thumb-screws A<2> on bolts which pass through slots in the bracket B. Microphones.-The microphones may be differential, and of the design shown in Fig. 3. Two plates A<6>, A<21>, perforated with holes A<7>, A<22>, have clamped at their centres the plates A<10>, A<25>, bearing the electrodes A<9>, A<24>. Between them, and suitably insulated from them, is clamped the diaphragm A<13> in such a way as to leave flat annular spaces A<12>, A<28> from which the granules are excluded by fluffy asbestos or similar packing A<29>. The parts are fastened together by bolts A<30> which engage the interior screw-threads of larger bolts A<32> so as to hold the back-plate A<5> in position. A conical sound-reflector A<11> is provided. The terminal A<18> is in electrical connexion with the diaphragm by way of a ring of metal A<17> which is insulated by a ring from the plate A<21>. To avoid packing, the quantities of granuies on either side of the diaphragm are equal. Telephone systems.-The arrangement of the circuits is shown in Fig. 6, wherein A<13> are the central or vibrating electrodes (i.e. the diaphragms) and A<9>, A<24> are the fixed electrodes of two microphones connected in multiple arc, and in series with a source of current G and resistance L. The diaphragms A<13> are connected to the line-wires L<1>, in which condensers L<2> &c. may be placed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191322157T | 1913-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191322157A true GB191322157A (en) | 1914-10-01 |
Family
ID=32646611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191322157D Expired GB191322157A (en) | 1913-10-01 | 1913-10-01 | Improvements in or relating to Telephone Transmitting Apparatus. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191322157A (en) |
-
1913
- 1913-10-01 GB GB191322157D patent/GB191322157A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB191322157A (en) | Improvements in or relating to Telephone Transmitting Apparatus. | |
US1422877A (en) | Acoustical aid for deaf persons | |
US790945A (en) | Telephone-transmitter. | |
US1863322A (en) | Telephone pay station | |
US617433A (en) | Telephone | |
US791657A (en) | Telephone-transmitter. | |
US875156A (en) | Telephone-transmitter. | |
US213090A (en) | Improvement in electric speaking-telephones | |
US1628898A (en) | Telephone transmitter | |
US252641A (en) | Compound telephone | |
US504454A (en) | Telephone-transmitter | |
US792927A (en) | Telephone-transmitter. | |
US794137A (en) | Telephone-receiver. | |
US336744A (en) | kandall | |
US559837A (en) | Half to william f | |
US1719645A (en) | Intelligence signaling apparatus | |
US547460A (en) | Andrew b craham | |
US535289A (en) | Telephony | |
US872284A (en) | Transmitter. | |
GB190215777A (en) | Improvements in Telephone Instruments. | |
US433981A (en) | Edward davis | |
GB190415043A (en) | Improvements in Electric Telephonic Transmitters and like Instruments. | |
US1198345A (en) | Telephone-transmitter. | |
US1077373A (en) | Telephone-transmitter. | |
US837457A (en) | Telephone-transmitter. |