GB515090A - Improvements in and relating to electro-acoustic transmitters - Google Patents
Improvements in and relating to electro-acoustic transmittersInfo
- Publication number
- GB515090A GB515090A GB13287/38A GB1328738A GB515090A GB 515090 A GB515090 A GB 515090A GB 13287/38 A GB13287/38 A GB 13287/38A GB 1328738 A GB1328738 A GB 1328738A GB 515090 A GB515090 A GB 515090A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- laminations
- electro
- hughes
- former
- 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
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Geophysics And Detection Of Objects (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
515,090. Electro-acoustic transmitters ; magnets. HUGHES & SON, Ltd., H., SPROULE, D. O., and HUGHES, A. J. May 4, 1938, No. 13287. [Class 40 (iv)] [Also in Group XXXV] An electro-acoustic transmitter &c. of the moving-coil type for echo-sounding has its core composed of two series of laminations h, j, so arranged one within the other as to form a tunnel for the polarizing coil b and an annular gap c for the driver coil s. The laminations are formed with inclined surfaces d, e, which cooperate with similarly shaped surfaces p, r, on a base plate f and a clamping ring g. The laminations, which are provided with an insulating layer, may be of tapered section. Alternatively, peripheral spacers are provided be-, tween the laminations h, j. The coil s oh the former t may be replaced by a cylindrical metal member in which the signal currents are induced by transformer action from the energising coil b to which the signal currents are supplied in addition to intermittent energising current. The former t, or the equivalent metal member, is connected to a diaphragm supported in a housing w which carries a horn v and is attached to the ring g and base plate f. The assembled core may'be impregnated with a natural or artificial insulating substance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13287/38A GB515090A (en) | 1938-05-04 | 1938-05-04 | Improvements in and relating to electro-acoustic transmitters |
| US271025A US2271667A (en) | 1938-05-04 | 1939-05-01 | Electroacoustic transmitter and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13287/38A GB515090A (en) | 1938-05-04 | 1938-05-04 | Improvements in and relating to electro-acoustic transmitters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB515090A true GB515090A (en) | 1939-11-27 |
Family
ID=10020214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13287/38A Expired GB515090A (en) | 1938-05-04 | 1938-05-04 | Improvements in and relating to electro-acoustic transmitters |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2271667A (en) |
| GB (1) | GB515090A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3018467A (en) * | 1955-11-07 | 1962-01-23 | Harris Transducer Corp | Resonant reactively operating variable position transducer |
-
1938
- 1938-05-04 GB GB13287/38A patent/GB515090A/en not_active Expired
-
1939
- 1939-05-01 US US271025A patent/US2271667A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2271667A (en) | 1942-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB513895A (en) | Improvements in telephone instruments | |
| GB515090A (en) | Improvements in and relating to electro-acoustic transmitters | |
| ES479897A1 (en) | Speech aid apparatus | |
| GB1055747A (en) | Electro-acoustic transducers | |
| GB445935A (en) | An improved sound reproducing device | |
| GB672467A (en) | Improvements in and relating to sound reproducing devices | |
| GB442900A (en) | Improvements in or relating to permanent magnet assemblies | |
| GB1229040A (en) | ||
| GB341531A (en) | Loud speakers | |
| GB893838A (en) | Improvements relating to loudspeakers | |
| GB725182A (en) | Improvements in or relating to moving coil loudspeakers | |
| GB306044A (en) | Improvements in and relating to sound reproducing apparatus | |
| GB447846A (en) | Improvements in and relating to moving-coil loud speakers | |
| GB858250A (en) | Improvements in or relating to permanent magnet assemblies | |
| GB835271A (en) | Periodic magnetic electron beam focusing arrangement | |
| GB771934A (en) | Improvements in and relating to insulated electrical apparatus | |
| GB965591A (en) | Improvements in or relating to electro-acoustic converters | |
| GB705330A (en) | Improvements relating to electromagnetic telephone instruments | |
| GB355315A (en) | Improvements in loud speaker motors | |
| SU25972A1 (en) | Electrodynamic loudspeaker | |
| GB597935A (en) | Improvements in or relating to moving coil loud speakers and other electrical devices having a member movable in a magnetic gap | |
| GB748034A (en) | Improvements in or relating to magnet units of moving-coil type loudspeakers | |
| GB703809A (en) | Improvements relating to moving coil loudspeakers and other forms of transducer | |
| GB392524A (en) | Improvements in and relating to sound reproducing devices | |
| GB410960A (en) | Improvements in or relating to sound reproducing instruments |