GB191801A - Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus - Google Patents
Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatusInfo
- Publication number
- GB191801A GB191801A GB2720821A GB2720821A GB191801A GB 191801 A GB191801 A GB 191801A GB 2720821 A GB2720821 A GB 2720821A GB 2720821 A GB2720821 A GB 2720821A GB 191801 A GB191801 A GB 191801A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rubber
- trumpet
- tube
- sound
- trumpets
- 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
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
- G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching
-
- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Soy Sauces And Products Related Thereto (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
191,801. Graham, E. A. Oct. 13, 1921. Mouthpieces and earpieces and attachments.-A transmitter mouthpiece or a receiver trumpet has a tubular cushion of a sound-insulating, sound - absorbing or non- sonorous material such as rubber, rubber sponge or cork arranged between it and an intake tube or sound exit tube attached to the associated apparatus in order to absorb undesired resonant vibrations. In an example, Fig. 1, a flanged tube a of rubber is arranged 'between the member b and the trumpet or mouthpiece c. In a modification, the trumpet c is mounted inside a flanged rubber tube which is fitted within the member b. The parts may be held together by friction or by cement, &c.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1572825A GB254092A (en) | 1925-06-17 | 1925-06-17 | Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191801A true GB191801A (en) | 1923-01-15 |
Family
ID=10064422
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2720821A Expired GB191801A (en) | 1925-06-17 | 1921-10-13 | Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus |
GB1572825A Expired GB254092A (en) | 1925-06-17 | 1925-06-17 | Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1572825A Expired GB254092A (en) | 1925-06-17 | 1925-06-17 | Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB191801A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106024297B (en) * | 2016-06-02 | 2017-11-07 | 科润电力科技股份有限公司 | A kind of mounting structure of dry-type transformer |
-
1921
- 1921-10-13 GB GB2720821A patent/GB191801A/en not_active Expired
-
1925
- 1925-06-17 GB GB1572825A patent/GB254092A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB254092A (en) | 1926-07-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB191801A (en) | Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus | |
GB308801A (en) | Improvements in sound reproducing apparatus, such as loud-speaking telephonic receivers | |
GB701444A (en) | Improvements in or relating to microphones | |
US989814A (en) | Auxiliary telephone-receiver. | |
GB168176A (en) | Improvements in dispatcher's telephone apparatus | |
GB217675A (en) | Improvements in or relating to sound directing or amplifying horns and like acoustic apparatus | |
US1560730A (en) | Sound recordation | |
GB207487A (en) | Loud-speaking telephones | |
GB626478A (en) | Improvements in and relating to a mouthpiece for wind-instruments and reed holder for such a mouthpiece | |
US1590627A (en) | Sound conveyer | |
GB129244A (en) | Improved Means for Giving Vibratory Oscillations to the Human Ear. | |
GB318634A (en) | Improvements in microphones and like instruments | |
GB257271A (en) | Telephone with free vibrating diaphragm surface | |
GB207205A (en) | Improvements in acoustical signalling apparatus | |
GB674508A (en) | Aural device for locating noises in machines, pipes, and the like | |
US1599149A (en) | Sound-box attachment for recording horns | |
US329732A (en) | Sound-concentrator for telephonic instruments | |
GB274576A (en) | Improvements in and relating to sound amplifying devices for use with telephone receivers | |
GB253393A (en) | Improvement in telephone attachments | |
GB190926779A (en) | Improvements in and connected with Telephone Transmitters. | |
GB167558A (en) | Improvements in or relating to means for amplifying the sounds of the receivers of telephonic or like instruments | |
US1785193A (en) | Amplifier horn | |
GB202268A (en) | Improvements in sound transmitting devices for use in connexion with the use of telephone receivers | |
ES20260U (en) | Auxiliary acoustic device for telephone hearing (Machine-translation by Google Translate, not legally binding) | |
GB190905114A (en) | Secret Telephone Transmitters. |