GB167558A - Improvements in or relating to means for amplifying the sounds of the receivers of telephonic or like instruments - Google Patents
Improvements in or relating to means for amplifying the sounds of the receivers of telephonic or like instrumentsInfo
- Publication number
- GB167558A GB167558A GB1268220A GB1268220A GB167558A GB 167558 A GB167558 A GB 167558A GB 1268220 A GB1268220 A GB 1268220A GB 1268220 A GB1268220 A GB 1268220A GB 167558 A GB167558 A GB 167558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- horn
- receivers
- telephone
- shows
- telephonic
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
167,558. Gordelier, F. H. May 7, 1920. Sound magnifying and directing appliances applied to telephone receivers. Fig. 3 shows a pedestal telephone set in which the received speech is amplified by a horn E, F connected through a sound-box A to the earpiece of the telephone receiver X. The part F of the horn is mounted on a screwed spindle f and is adjustable relatively to the part E. Fig. 5 shows an alternative form of compound horn, and Fig. 8 is a cubical form on which the curvature of the reflecting plate M is adjusted by a screw N. Other modified forms of trumpet are described. A microphone may be interposed between the end of the tube A and the horn; or a needle, spring, or other device, actuated by the vibrations of the receiver diaphragm, may be arranged to operate a bell or other audible alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1268220A GB167558A (en) | 1920-05-07 | 1920-05-07 | Improvements in or relating to means for amplifying the sounds of the receivers of telephonic or like instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1268220A GB167558A (en) | 1920-05-07 | 1920-05-07 | Improvements in or relating to means for amplifying the sounds of the receivers of telephonic or like instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB167558A true GB167558A (en) | 1921-08-08 |
Family
ID=10009183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1268220A Expired GB167558A (en) | 1920-05-07 | 1920-05-07 | Improvements in or relating to means for amplifying the sounds of the receivers of telephonic or like instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB167558A (en) |
-
1920
- 1920-05-07 GB GB1268220A patent/GB167558A/en not_active Expired
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