GB548273A - Improvements in sound reproducing and receiving devices - Google Patents
Improvements in sound reproducing and receiving devicesInfo
- Publication number
- GB548273A GB548273A GB1078942A GB1078942A GB548273A GB 548273 A GB548273 A GB 548273A GB 1078942 A GB1078942 A GB 1078942A GB 1078942 A GB1078942 A GB 1078942A GB 548273 A GB548273 A GB 548273A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- magnet
- pole
- pieces
- water
- 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
548,273. Subaqueous signalling apparatus. HARRISON, F. Dec. 20, 1940, No. 10789/42. Divided out of 548,245, [Group XXXIX]. [Class 118 (ii)] [Also in Group XXXIX] An instrument of telephonic type, for transmitting or receiving speech &c. through water, has an armature 1 connected to a conical diaphragm 6, the magnet 24 being completely encased (e.g. in a moulded mass 55) with the exception of small parts of the pole-pieces, the arrangement being such that water has free access to both sides of the diaphragm and armature, all metal parts in contact with the water being protected, e.g. by electroplating. The magnet and armature may be constructed as in Specification 548,245, and the magnet may be adjusted by a screw 25 connected by a universal joint 56 to a member 57 passing through a gland in the casing 51. The diaphragm is connected at its periphery to the chassis by spaced strips of corrugated metal. The pole-pieces and armature are connected in circuit with a battery and lamp, which glows if the armature touches the pole-pieces.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1792340A GB548245A (en) | 1940-12-20 | 1940-12-20 | Improvements in sound reproducing and receiving devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB548273A true GB548273A (en) | 1942-10-02 |
Family
ID=10103605
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1078942A Expired GB548273A (en) | 1940-12-20 | 1940-12-20 | Improvements in sound reproducing and receiving devices |
| GB1792340A Expired GB548245A (en) | 1940-12-20 | 1940-12-20 | Improvements in sound reproducing and receiving devices |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1792340A Expired GB548245A (en) | 1940-12-20 | 1940-12-20 | Improvements in sound reproducing and receiving devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB548273A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2207026A (en) * | 1986-01-15 | 1989-01-18 | Glenn Raymond Johns | Diving communications aid |
-
1940
- 1940-12-20 GB GB1078942A patent/GB548273A/en not_active Expired
- 1940-12-20 GB GB1792340A patent/GB548245A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2207026A (en) * | 1986-01-15 | 1989-01-18 | Glenn Raymond Johns | Diving communications aid |
Also Published As
| Publication number | Publication date |
|---|---|
| GB548245A (en) | 1942-10-02 |
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