NL71197C - - Google Patents

Info

Publication number: NL71197C
Authority: NL; Netherlands

Application number

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.)

1947-06-18

Publication of NL71197C publication Critical patent/NL71197C/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

Physics & Mathematics (AREA)
Electromagnetism (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Permanent Field Magnets Of Synchronous Machinery (AREA)

NL71197D 1947-06-18 NL71197C (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US755397A US2506624A (en)	1947-06-18	1947-06-18	Electroacoustic transducer

Publications (1)

Publication Number	Publication Date
NL71197C true NL71197C (de)

Family

ID=25038963

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL71197D NL71197C (de)	1947-06-18

Country Status (6)

Country	Link
US (1)	US2506624A (de)
BE (1)	BE481098A (de)
DE (1)	DE813164C (de)
FR (1)	FR963471A (de)
GB (1)	GB653923A (de)
NL (1)	NL71197C (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2535757A (en) *	1946-06-25	1950-12-26	John J Root	Peripherally driven electroacoustical transducer
US2567365A (en) *	1948-08-04	1951-09-11	Bell Telephone Labor Inc	Polarized operator for telephone receivers
US2717096A (en) *	1953-01-23	1955-09-06	Minnis W Henderson	Magnet gas tank cap
US4075437A (en) *	1976-07-16	1978-02-21	Bell Telephone Laboratories, Incorporated	Composition, processing and devices including magnetic alloy
US4174983A (en) *	1978-07-13	1979-11-20	Bell Telephone Laboratories, Incorporated	Fe-Cr-Co magnetic alloy processing
US4258234A (en) *	1979-08-24	1981-03-24	Bell Telephone Laboratories, Incorporated	Electroacoustic device
US4311537A (en) *	1980-04-22	1982-01-19	Bell Telephone Laboratories, Incorporated	Low-cobalt Fe-Cr-Co permanent magnet alloy processing
US4443667A (en) *	1982-01-11	1984-04-17	Bell Telephone Laboratories, Incorporated	Electromagnetic transducer
NL8602719A (nl) *	1986-10-29	1988-05-16	Philips Nv	Trillingsmotor.
DE3819771A1 (de) *	1987-12-18	1989-07-06	Karl Scheffer Klute Gmbh & Co	Handluftpumpe fuer zweiradreifen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1228639A (en) *	1914-03-27	1917-06-05	Erik Christian Bayer	Sound-producing device.
US1579605A (en) *	1925-10-17	1926-04-06	Gavin Percy	Radio amplifying receiver
US1895071A (en) *	1928-09-25	1933-01-24	Herman J Fanger	Dynamic loud speaker unit
BE401119A (de) *	1931-02-12
US2170571A (en) *	1936-08-12	1939-08-22	Bell Telephone Labor Inc	Acoustic device
US2249160A (en) *	1939-05-19	1941-07-15	Bell Telephone Labor Inc	Acoustic device
US2395166A (en) *	1942-12-24	1946-02-19	Astatic Corp	Transducer

0
- BE BE481098D patent/BE481098A/xx unknown
- NL NL71197D patent/NL71197C/xx active
- FR FR963471D patent/FR963471A/fr not_active Expired
1947
- 1947-06-18 US US755397A patent/US2506624A/en not_active Expired - Lifetime
1948
- 1948-06-17 GB GB16314/48A patent/GB653923A/en not_active Expired
- 1948-12-31 DE DEP28875D patent/DE813164C/de not_active Expired

Also Published As

Publication number	Publication date
US2506624A (en)	1950-05-09
FR963471A (de)	1950-07-11
BE481098A (de)
DE813164C (de)	1951-09-10
GB653923A (en)	1951-05-30

Publication	Publication Date	Title
FR959299A (de)	1950-03-28
FR963471A (de)	1950-07-11
AT166672B (de)	1950-09-11
FR963509A (de)	1950-07-17
BE474505A (de)	1947-04-30
BE474872A (de)	1947-08-30
BE472727A (de)
BE458425A (de)
BE470671A (de)
NL82293C (de)
NL74414C (de)	1953-11-16
BE401708A (de)
NL67201C (de)	1951-01-15
NL138552C (de)
LU29085A1 (de)
BE467279A (de)
BE470620A (de)
BE484111A (de)
BE482217A (de)
BE480838A (de)
BE480538A (de)
BE474384A (de)
BE474878A (de)
BE471492A (de)
BE474625A (de)