CA1026027A - Transmitting and receiving apparatus using single reversible transducer - Google Patents

Transmitting and receiving apparatus using single reversible transducer

Info

Publication number: CA1026027A
Authority: CA; Canada
Prior art keywords: transmitting; receiving apparatus; reversible transducer; single reversible; transducer
Prior art date: 1974-04-04
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

Application number

CA223,868A

Other languages

French (fr)

Inventor

Ryoichi Matsuda

Giichi Ito

Kazuhiko Kakehi

Masaaki Terai

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nippon Telegraph and Telephone Corp

Original Assignee

Nippon Telegraph and Telephone Corp

Priority date (The priority date 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 date listed.)

1974-04-04

Filing date

1975-04-04

Publication date

1978-02-07

1975-04-04 Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp

1978-02-07 Application granted granted Critical

1978-02-07 Publication of CA1026027A publication Critical patent/CA1026027A/en

Status Expired legal-status Critical Current

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- 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
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

CA223,868A 1974-04-04 1975-04-04 Transmitting and receiving apparatus using single reversible transducer Expired CA1026027A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP49037326A JPS50131705A (en)	1974-04-04	1974-04-04

Publications (1)

Publication Number	Publication Date
CA1026027A true CA1026027A (en)	1978-02-07

Family

ID=12494516

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA223,868A Expired CA1026027A (en)	1974-04-04	1975-04-04	Transmitting and receiving apparatus using single reversible transducer

Country Status (6)

Country	Link
US (1)	US4002860A (en)
JP (1)	JPS50131705A (en)
CA (1)	CA1026027A (en)
DE (1)	DE2514845A1 (en)
GB (1)	GB1507343A (en)
SE (1)	SE402848B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4115658A (en) *	1977-04-11	1978-09-19	Williams Richard W	Two way telephone amplifier
DE2913244C2 (en) *	1979-04-03	1981-07-02	Krone Gmbh, 1000 Berlin	Clock-controlled intercom to avoid acoustic feedback with one or more sound transducers
US4251689A (en) *	1979-07-09	1981-02-17	Canadian Patents & Dev. Ltd.	Loudspeaker telephone apparatus
US5907538A (en) *	1997-02-18	1999-05-25	White; Donald R.	Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input
US7072476B2 (en) *	1997-02-18	2006-07-04	Matech, Inc.	Audio headset
US6298046B1 (en) *	1998-08-28	2001-10-02	Rc Networks	Adjustable balancing circuit for an adaptive hybrid and method of adjusting the same
EP1683328A4 (en) *	2003-11-11	2008-01-23	Matech Inc	Two-way communications device having a single transducer
US7826805B2 (en) *	2003-11-11	2010-11-02	Matech, Inc.	Automatic-switching wireless communication device
US8315379B2 (en) *	2004-11-10	2012-11-20	Matech, Inc.	Single transducer full duplex talking circuit
JP5009913B2 (en) *	2006-07-27	2012-08-29	株式会社Ｓ＆Ｓエンジニアリング	Self-propelled cart horizontal transfer mechanism
CA2750445A1 (en) *	2009-01-23	2010-07-29	Widex A/S	A system, method and hearing aids for in situ occlusion effect measurement
KR20130030765A (en) *	2010-07-05	2013-03-27	비덱스 에이/에스	System and method for measuring and validating the occlusion effect of a hearing aid user
DE102017105594A1 (en) *	2017-03-16	2018-09-20	USound GmbH	Amplifier unit for a sound transducer and sound generation unit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2282465A (en) *	1941-02-27	1942-05-12	Bell Telephone Labor Inc	Speech transmission system
US2535063A (en) *	1945-05-03	1950-12-26	Farnsworth Res Corp	Communicating system
NL190604A (en) *	1953-09-11
US3178648A (en) *	1962-06-18	1965-04-13	De Loss J Tanner	Transistorized amplifier utilizing an input transformer bootstrap configuration
US3889058A (en) *	1969-01-15	1975-06-10	Ard Anstalt	Telephone systems with reduced acoustic feedback
US3784755A (en) *	1971-09-07	1974-01-08	Bell Canada Northern Electric	Long-line telephone circuit
JPS5233963B2 (en) *	1971-09-28	1977-08-31
US3753786A (en) *	1972-03-29	1973-08-21	Gould Inc	Method and apparatus for adjusting battery electrolyte concentration
JPS5226972B2 (en) *	1973-07-28	1977-07-18

1974
- 1974-04-04 JP JP49037326A patent/JPS50131705A/ja active Pending
1975
- 1975-04-02 US US05/564,544 patent/US4002860A/en not_active Expired - Lifetime
- 1975-04-03 GB GB13615/75A patent/GB1507343A/en not_active Expired
- 1975-04-03 SE SE7503851A patent/SE402848B/en unknown
- 1975-04-04 CA CA223,868A patent/CA1026027A/en not_active Expired
- 1975-04-04 DE DE19752514845 patent/DE2514845A1/en not_active Ceased

Also Published As

Publication number	Publication date
SE7503851L (en)	1975-10-06
SE402848B (en)	1978-07-17
US4002860A (en)	1977-01-11
JPS50131705A (en)	1975-10-18
GB1507343A (en)	1978-04-12
DE2514845A1 (en)	1975-10-09

Publication	Publication Date	Title
AU500496B2 (en)	1979-05-24	Ultrasonic wave transmitting & receiving apparatus
CA1031827A (en)	1978-05-23	Portable transmitter
CA1016263A (en)	1977-08-23	Sonar apparatus
AU490475B1 (en)	1976-08-26	Moving ultrasonic transducer array
CA1035233A (en)	1978-07-25	Check receiving apparatus
GB1547608A (en)	1979-06-20	Ultrasonic wave transmitting and receiving apparatus
CA1004247A (en)	1977-01-25	Anti-jackknife apparatus
CA1035237A (en)	1978-07-25	Lung-venting apparatus
CA1016859A (en)	1977-09-06	Shear apparatus
CA1025060A (en)	1978-01-24	Bonding apparatus
CA1026027A (en)	1978-02-07	Transmitting and receiving apparatus using single reversible transducer
AU8183975A (en)	1976-12-09	Ceramic impedance device
CA1015950A (en)	1977-08-23	Spin-blast apparatus
CA945679A (en)	1974-04-16	Wave measuring apparatus
GB1547290A (en)	1979-06-06	Ultrasonic wave transmitting and receiving apparatus
CA1034865A (en)	1978-07-18	Ultrasonic cutting apparatus
CA995661A (en)	1976-08-24	Freezing-warming apparatus
CA1034070A (en)	1978-07-04	Milking method and apparatus
AU499523B2 (en)	1979-04-26	Electroacoustic transducer
CA1018137A (en)	1977-09-27	Roll-winding apparatus
CA1019056A (en)	1977-10-11	Ultrasonic wave transmitting system
CA1019665A (en)	1977-10-25	Pack-forming apparatus
AU499915B2 (en)	1979-05-03	Data transmission using carrier waves
CA1022196A (en)	1977-12-06	Workpiece-handling apparatus
CA1030179A (en)	1978-04-25	Valved coupling device