GB1375919A - Telephones - Google Patents
TelephonesInfo
- Publication number
- GB1375919A GB1375919A GB5620072A GB5620072A GB1375919A GB 1375919 A GB1375919 A GB 1375919A GB 5620072 A GB5620072 A GB 5620072A GB 5620072 A GB5620072 A GB 5620072A GB 1375919 A GB1375919 A GB 1375919A
- Authority
- GB
- United Kingdom
- Prior art keywords
- adaptor
- receiver
- switch
- inductive coupling
- telephone
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
- H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
- H04M1/2155—Acoustic coupling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/62—Constructional arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Set Structure (AREA)
Abstract
1375919 Hearing aids; inductive signalling VIENNATONE HORGERATE PRODUKTIONS GmbH 6 Dec 1972 [9 Dec 1971] 56200/72 Headings H4J and H4U An adaptor, for amplifying signals from a telephone receiver 4 and providing for inductive coupling of the amplified signals to a "telephone coil" of a hearing aid, comprises a piezoelectric or capacitor microphone 3, a transistor amplifier mounted on a circuit board 2, a battery (Fig. 2, not shown), and an iron cored coil 7 for providing inductive coupling to a hearing aid telephone coil situated within 10 cm. of the adaptor. The adaptor is mounted on the receiver 4 by a rubber sleeve 11 and a switch 10 is provided which is held depressed to operate the adaptor. Alternatively a mercury switch may be provided which switches on the adaptor when the hand set is held vertically or the adaptor can be made as two telescopically engaging parts such that when the ear piece of the adaptor is pressed against the ear a switch is actuated. Sound apertures 5 are provided to enable the receiver to be used conventionally with the adaptor mounted. Figures 3, 4 (not shown), illustrate a variation in arrangement of the adaptor wherein most of the components are mounted so as to lie adjacent the periphery of receiver 4 thereby reducing the dimension of the adaptor in the axial direction thereof. The amplifier may be arranged to have a frequency response which compensates for the low frequency loss in the receiver-microphone coupling due to the apertures 5, and for the high frequency boost caused by the inductive coupling.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1061371A AT320750B (en) | 1971-12-09 | 1971-12-09 | Telephone adapter for the hard of hearing that can be attached to a telephone higher |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1375919A true GB1375919A (en) | 1974-12-04 |
Family
ID=3623544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5620072A Expired GB1375919A (en) | 1971-12-09 | 1972-12-06 | Telephones |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT320750B (en) |
DE (1) | DE2259087B2 (en) |
GB (1) | GB1375919A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154390A (en) * | 1984-02-14 | 1985-09-04 | Michael George Scott Debenham | Telephone handset earpiece attachment |
WO2004049503A1 (en) * | 2002-11-26 | 2004-06-10 | Myers Johnson, Inc. | Universal wireless interface system |
EP1769654A2 (en) * | 2004-07-13 | 2007-04-04 | Motorola, Inc. | Method and system for selective coupling of a communication unit to a hearing enhancement device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2515456B1 (en) * | 1981-10-28 | 1989-07-28 | Lem | REMOVABLE AMPLIFIED EARPHONE |
DE3414331A1 (en) * | 1984-04-16 | 1985-10-17 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for increasing the volume in the case of dynamic transducers |
EP2023652A1 (en) * | 2007-07-30 | 2009-02-11 | Alcatel Lucent | Audio driver device and method of operating an audio driver device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE652080C (en) * | 1926-11-17 | 1937-10-25 | Heinrich J Kuechenmeister | Arrangement for teleconsulting and remote listening to a telephone |
DE1042655B (en) * | 1955-07-01 | 1958-11-06 | Kapsch Telephon Telegraph | Handset for telephone stations |
DE1781840U (en) * | 1958-11-25 | 1959-01-29 | Kieler Howaldtswerke Ag | DEVICE FOR LISTENING TO THE TELEPHONE. |
DE1831646U (en) * | 1961-02-06 | 1961-05-25 | Bock Manfred | TRANSISTOR RECEIVER AMPLIFIER. |
DE1277352B (en) * | 1966-10-11 | 1968-09-12 | Robert James Cooke | Sound playback device for attaching to a telephone receiver |
-
1971
- 1971-12-09 AT AT1061371A patent/AT320750B/en not_active IP Right Cessation
-
1972
- 1972-12-02 DE DE19722259087 patent/DE2259087B2/en not_active Withdrawn
- 1972-12-06 GB GB5620072A patent/GB1375919A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154390A (en) * | 1984-02-14 | 1985-09-04 | Michael George Scott Debenham | Telephone handset earpiece attachment |
WO2004049503A1 (en) * | 2002-11-26 | 2004-06-10 | Myers Johnson, Inc. | Universal wireless interface system |
EP1769654A2 (en) * | 2004-07-13 | 2007-04-04 | Motorola, Inc. | Method and system for selective coupling of a communication unit to a hearing enhancement device |
EP1769654A4 (en) * | 2004-07-13 | 2009-07-29 | Motorola Inc | Method and system for selective coupling of a communication unit to a hearing enhancement device |
Also Published As
Publication number | Publication date |
---|---|
DE2259087B2 (en) | 1981-07-09 |
AT320750B (en) | 1975-02-25 |
DE2259087A1 (en) | 1973-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |