BE414489A - - Google Patents

Info

Publication number: BE414489A
Authority: BE; Belgium

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.)

1935-03-23

Publication of BE414489A publication Critical patent/BE414489A/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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Landscapes

Health & Medical Sciences (AREA)
Otolaryngology (AREA)
Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Details Of Audible-Bandwidth Transducers (AREA)
Building Environments (AREA)
Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

BE414489D 1935-03-23 BE414489A (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US12551A US2020166A (en)	1935-03-23	1935-03-23	Sound reproducing apparatus

Publications (1)

Publication Number	Publication Date
BE414489A true BE414489A (sv)

Family

ID=21755497

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE414489D BE414489A (sv)	1935-03-23

Country Status (7)

Country	Link
US (1)	US2020166A (sv)
AT (1)	AT149923B (sv)
BE (1)	BE414489A (sv)
CH (1)	CH191887A (sv)
FR (1)	FR804770A (sv)
GB (1)	GB459003A (sv)
NL (1)	NL44803C (sv)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE970228C (de) *	1937-08-25	1958-08-28	Ing Karl Nowak	Schallstrahler mit raeumlich wirkender Wiedergabe
US2423045A (en) *	1943-09-04	1947-06-24	Kellogg M W Co	Liquid phase catalytic reactions of hydrocarbons
US2888090A (en) *	1949-10-14	1959-05-26	Telefunken Gmbh	Loudspeaker arrangement
US2816619A (en) *	1951-12-04	1957-12-17	John E Karlson	Acoustic transducers
US2787332A (en) *	1952-09-06	1957-04-02	Norman C Fulmer	Loud-speaker system
DE1098542B (de) *	1954-09-18	1961-02-02	Dr Emil Podszus	Lautsprecher aus mehreren Elementen
GB793193A (en) *	1955-02-17	1958-04-09	Pye Ltd	An improved acoustic enclosure for loudspeakers
US2858899A (en) *	1956-07-03	1958-11-04	Lopez-Henriquez Miguel	High fidelity speaker enclosure system
GB829214A (en) *	1957-01-11	1960-03-02	Douglas Arthur Lyons	Improvements in loud speaker systems
EP0334843B1 (de) *	1986-12-02	1990-08-29	SPORS, Wolfgang	Lautsprecher-anordnung
GR1000561B (el) *	1988-06-01	1992-08-26	Wolfgang Spors	Διαταξη μεγαφωνων.
USD772810S1 (en) *	2013-11-08	2016-11-29	Rusty Chisel, LLC	Radio charging station

0
- BE BE414489D patent/BE414489A/xx unknown
- NL NL44803D patent/NL44803C/xx active
1935
- 1935-03-23 US US12551A patent/US2020166A/en not_active Expired - Lifetime
- 1935-12-23 GB GB35579/35A patent/GB459003A/en not_active Expired
1936
- 1936-03-19 CH CH191887D patent/CH191887A/de unknown
- 1936-03-19 AT AT149923D patent/AT149923B/de active
- 1936-03-21 FR FR804770D patent/FR804770A/fr not_active Expired

Also Published As

Publication number	Publication date
NL44803C (sv)
GB459003A (en)	1936-12-31
US2020166A (en)	1935-11-05
CH191887A (de)	1937-07-15
AT149923B (de)	1937-06-10
FR804770A (fr)	1936-11-02

Publication	Publication Date	Title
BE410739A (sv)
NL47517C (sv)	1939-08-15
BE405881A (sv)
BE407131A (sv)
BE407302A (sv)	1935-02-28
BE407388A (sv)
BE407411A (sv)
BE409569A (sv)	1935-06-29
BE407487A (sv)
BE407491A (sv)	1936-11-30
BE407519A (sv)	1935-02-28
BE407622A (sv)	1936-02-28
BE407630A (sv)
BE407652A (sv)
BE407653A (sv)
BE407703A (sv)
BE407774A (sv)
BE407804A (sv)	1935-03-30
BE407883A (sv)	1935-03-30
BE408024A (sv)
BE408083A (sv)
BE408090A (sv)	1935-03-30
BE408096A (sv)
BE408282A (sv)
BE408330A (sv)