GB191506586A - Improvements in or relating to Thermic Telephones and Microphones. - Google Patents
Improvements in or relating to Thermic Telephones and Microphones.Info
- Publication number
- GB191506586A GB191506586A GB191506586DA GB191506586A GB 191506586 A GB191506586 A GB 191506586A GB 191506586D A GB191506586D A GB 191506586DA GB 191506586 A GB191506586 A GB 191506586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- support
- conductor
- terminals
- heating
- laid
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Insulated Conductors (AREA)
Abstract
6586. Lynden, R. A. Baron van, and Naamlooze Vennootschap de Nederlandische Thermo-Telephoon. May 3. [Cognate Application, 12,256/15.] Hot-wire transmitters and receivers. - The heating-conductor of a thermic telephone or microphone is laid or formed upon a support which is a partial conductor of heat but is practically a non-conductor of electricity. In Figs. 1 and 2, the heating-conductor E is shown in the form of an extremely thin S-shaped metallic ribbon or strip laid between terminals F on a support D of marble or like material. The conductor may be electrolytically deposited on the support, and may be formed to a.ny suitable shape by etching; or the conductor may be drawn, painted, or printed upon the support by a suitable metallic pigment or a carbon, blacklead, or metallic pencil. In another modification, the support is of metal covered by a film of oxide, sulphide, or other compound; or a thin laver of enamel, varnish, or the like may be applied to the support. In this case, the leads to the terminals F are led through insulating-sleeves. In all forms, the support serves to absorb the heat generated in the conductor F, but does not short - circuit it. A sound chamber C is superposed over the support D and is held down to a base B by a cap A forming an earpiece.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191506586T | 1915-05-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB191506586A true GB191506586A (en) | 1916-04-27 |
Family
ID=32674784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB191506586D Expired GB191506586A (en) | 1915-05-03 | 1915-05-03 | Improvements in or relating to Thermic Telephones and Microphones. |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE297633C (en) |
| FR (1) | FR481660A (en) |
| GB (1) | GB191506586A (en) |
| NL (1) | NL4054C (en) |
-
0
- NL NL4054D patent/NL4054C/xx active
- DE DENDAT297633D patent/DE297633C/de active Active
-
1915
- 1915-05-03 GB GB191506586D patent/GB191506586A/en not_active Expired
-
1916
- 1916-05-03 FR FR481660A patent/FR481660A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE297633C (en) | |
| FR481660A (en) | 1917-01-05 |
| NL4054C (en) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES423227A1 (en) | Electrical connections to conductors having thin film insulation | |
| ATE199290T1 (en) | ELECTRON EMITTING DEVICE AND PRODUCTION METHOD | |
| US20070160247A1 (en) | Heat-resistant electret condenser microphone | |
| US3646280A (en) | Backplate for electret loudspeaker | |
| KR880000963B1 (en) | Electret microphone shield | |
| CN110691308A (en) | A conducting film and sound generating mechanism for sound generating mechanism | |
| KR970023839A (en) | Air bridge formation method | |
| GB191506586A (en) | Improvements in or relating to Thermic Telephones and Microphones. | |
| GB1253645A (en) | Improvements in or relating to the production of electrically insulated contacts | |
| JPH04221867A (en) | Ceramic piezoelectric transformer disc and its manufacture | |
| US3586792A (en) | Method for assembling electro-acoustical transducer diaphragm assemblies | |
| US4508755A (en) | Method of applying a layer of conductive ink | |
| CA2215223A1 (en) | Surface coating of insulating materials, the procedure for making it, and its application to shieldings for insulated housings | |
| US1312504A (en) | Thermic | |
| JPS62116229A (en) | Key hitting force sensor | |
| KR200401086Y1 (en) | Flat panel hybrid speaker | |
| CN218071715U (en) | Microphone with insulating copper ring | |
| CN213428334U (en) | Electronic cigarette ignition controller and electronic cigarette | |
| CN214627364U (en) | Self-excitation bone conduction microphone | |
| JPH0230959Y2 (en) | ||
| SU726675A1 (en) | Electret microphone | |
| JPS5885897U (en) | Directional electret condenser microphone | |
| US1431196A (en) | Thermotelephone transmitter and receiver | |
| GB651988A (en) | Improvements in and relating to electric capacitors | |
| GB1042332A (en) | Improvements in or relating to thin film magnetic devices |