FR636865A - Improvements to electro-dynamic devices - Google Patents

Improvements to electro-dynamic devices

Info

Publication number: FR636865A
Authority: FR; France
Prior art keywords: electro; dynamic devices; dynamic; devices
Prior art date: 1926-08-04
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

Other languages

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.)

Electrical Research Products Inc

Original Assignee

Electrical Research Products Inc

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.)

1926-08-04

Filing date

1927-06-30

Publication date

1928-04-18

1927-06-30 Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc

1928-04-18 Application granted granted Critical

1928-04-18 Publication of FR636865A publication Critical patent/FR636865A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/022—Cooling arrangements

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Diaphragms For Electromechanical Transducers (AREA)

FR636865D 1926-08-04 1927-06-30 Improvements to electro-dynamic devices Expired FR636865A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US127152A US1707544A (en)	1926-08-04	1926-08-04	Electrodynamic device

Publications (1)

Publication Number	Publication Date
FR636865A true FR636865A (en)	1928-04-18

Family

ID=22428569

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR636865D Expired FR636865A (en)	1926-08-04	1927-06-30	Improvements to electro-dynamic devices

Country Status (5)

Country	Link
US (1)	US1707544A (en)
DE (1)	DE527965C (en)
FR (1)	FR636865A (en)
GB (1)	GB275567A (en)
NL (1)	NL23790C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE902015C (en) *	1940-09-04	1954-01-18	Klangfilm Gmbh	Hyperbaric loudspeaker
US2463762A (en) *	1941-11-14	1949-03-08	Automatic Elect Lab	Electroacoustical transducer
US2485405A (en) *	1944-04-21	1949-10-18	Stromberg Carlson Co	Dipole microphone
DE911143C (en) *	1951-11-25	1954-05-10	Siemens Ag	Loudspeaker system with pressure chamber and an onion for sound guidance
US2832844A (en) *	1957-04-29	1958-04-29	Univ Loudspeakers Inc	Speaker driver
JP3140895B2 (en) *	1993-10-08	2001-03-05	パイオニア株式会社	Speaker device
US20240121558A1 (en)	2022-05-09	2024-04-11	B&C Speakers S.P.A.	Acoustic compression chamber with modally coupled annular diaphragm
EP4373132A1 (en)	2022-11-18	2024-05-22	B&C Speakers NA (USA), LLC	Phase plug for compression driver

0
- NL NL23790D patent/NL23790C/xx active
1926
- 1926-08-04 US US127152A patent/US1707544A/en not_active Expired - Lifetime
1927
- 1927-06-07 GB GB14918/27A patent/GB275567A/en not_active Expired
- 1927-06-11 DE DEE35798D patent/DE527965C/en not_active Expired
- 1927-06-30 FR FR636865D patent/FR636865A/en not_active Expired

Also Published As

Publication number	Publication date
NL23790C (en)
US1707544A (en)	1929-04-02
DE527965C (en)	1931-06-24
GB275567A (en)	1928-01-19

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