GB210737A - Improvements in or relating to telephone apparatus - Google Patents
Improvements in or relating to telephone apparatusInfo
- Publication number
- GB210737A GB210737A GB24597/23A GB2459723A GB210737A GB 210737 A GB210737 A GB 210737A GB 24597/23 A GB24597/23 A GB 24597/23A GB 2459723 A GB2459723 A GB 2459723A GB 210737 A GB210737 A GB 210737A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- rod
- support
- bore
- coil
- 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
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
210,737. Radiotive Corporation, (Assignees of Schmidt, L.). Jan. 31, 1923, [Convention date]. Magnetic instruments; diaphragms, materials for. The tubular armature 18 of a telephone instrument or transmitter extends through the bore of a coil 14, and a vibratory support therefcr is arranged coaxially with the bore of the coil, is fixed at one end to the armature and at the other end to a fixed support, and its fulcrum is located exactly in the line of its axis and at a point midway between its ends. The permanent magnet 5, Fig. 2, may be of horse-shoe form with pole pieces. which are formed with flanges 9, 10. Each flange is provided with angularly disposed shoes 11, 12, which embrace a cylindrical spool 13 on which the coil 14 is wound. The support for the tubular armature 18 is a rod 17, preferably of phosphor bronze, which has a tight frictional grip in a reduced end of the bore of the armature and is fixed to a support 26 at the other end. This rod 17 is reduced in diameter at 25 so that this portion is on the axis of the armature and midway between its ends and acts as a fulcrum about which the armature and its supporting roct vibrate. The supporting rod 17 is connected to the diaphragm 30, which is preferably of celluloid, by a rod 28. Another form of supporting rod is shown in Fig. 6. Specification 208,330 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) also describes a rod of uniform cross section throughout as the support for the armature. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US210737XA | 1923-01-31 | 1923-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB210737A true GB210737A (en) | 1925-01-01 |
Family
ID=21802188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24597/23A Expired GB210737A (en) | 1923-01-31 | 1923-10-03 | Improvements in or relating to telephone apparatus |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1564026A (en) |
| DE (1) | DE423874C (en) |
| FR (1) | FR573000A (en) |
| GB (1) | GB210737A (en) |
| NL (1) | NL13948C (en) |
-
0
- US US1564026D patent/US1564026A/en not_active Expired - Lifetime
- NL NL13948D patent/NL13948C/xx active
-
1923
- 1923-10-03 GB GB24597/23A patent/GB210737A/en not_active Expired
- 1923-10-10 FR FR573000D patent/FR573000A/en not_active Expired
- 1923-10-17 DE DER59523D patent/DE423874C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE423874C (en) | 1926-01-13 |
| FR573000A (en) | 1924-06-16 |
| US1564026A (en) | 1925-12-01 |
| NL13948C (en) |
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