GB355917A - Improvements in or relating to electromagnetic horns - Google Patents
Improvements in or relating to electromagnetic hornsInfo
- Publication number
- GB355917A GB355917A GB23315/30A GB2331530A GB355917A GB 355917 A GB355917 A GB 355917A GB 23315/30 A GB23315/30 A GB 23315/30A GB 2331530 A GB2331530 A GB 2331530A GB 355917 A GB355917 A GB 355917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- diaphragm
- diameter
- yoke
- core
- 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
- G10K9/15—Self-interrupting arrangements
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Synchronous Machinery (AREA)
Abstract
355,917. Electric horns. BOSCH AKT.-GES., R., 4, Militõrstrasse, Stuttgart, Germany. Aug. 2, 1930, No. 23315. Convention date, Aug. 31, 1929. [Class 13.] Relates to an electromagnetic horn, more particularly for motor vehicles, in which an armature secured to a diaphragm and free of any guide is subjected to a magnetic pull in the direction of the axis of the diaphragm and consists in an arrangement i n which the flux passing into the armature at its end remote from the diaphragm passes out of it into a yoke to close the flux path, the yoke having a web portion which lies considerably nearer the diaphragm than the end of the armature. As shown, a diaphragm c is clamped between the two parts a, b of a casing and has a corrugated metal disc e and cylindrical armature f secured to its centre by a unit d. The end of the armature is preferably disposed at a distance from the diaphragm at least equal to one-sixth of the diameter of the diaphragm and its cross section at the most should be one-third of the diameter of the diaphragm whilst the seat of the armature attachment of the diaphragm is at least one-sixth of the diameter of the diaphragm. During operation the outer end of the armature strikes against the end of a magnet core g which is surrounded by a coil h and is riveted together with an iron disc i to the casing lid a. Radial longitudinal slots k are provided in the armature f and core g so as to reduce eddy current losses. The iron path from the core to the armature is completed by a yoke member l which is welded to the lid a and is provided with a central opening for the passage of the armature and a lateral recess for an interrupter spring m. The armature has an annular groove n where it passes through the yoke l and the part lying between this groove and the diaphragm is increased in diameter to form a flange which operates the interrupter spring m. If desired, the parts may be so adjusted that no actual striking occurs between the armature and core.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE355917X | 1929-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB355917A true GB355917A (en) | 1931-09-03 |
Family
ID=6290139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23315/30A Expired GB355917A (en) | 1929-08-31 | 1930-08-02 | Improvements in or relating to electromagnetic horns |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB355917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1127253B (en) * | 1958-07-16 | 1962-04-05 | Italiana Magneti Marelli Soc P | Electro-acoustic horn, especially for motor vehicles |
-
1930
- 1930-08-02 GB GB23315/30A patent/GB355917A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1127253B (en) * | 1958-07-16 | 1962-04-05 | Italiana Magneti Marelli Soc P | Electro-acoustic horn, especially for motor vehicles |
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