DE665323C - provided with Rueckkopplungssperre hybrid - Google Patents

provided with Rueckkopplungssperre hybrid

Info

Publication number
DE665323C
DE665323C DEN38630D DEN0038630D DE665323C DE 665323 C DE665323 C DE 665323C DE N38630 D DEN38630 D DE N38630D DE N0038630 D DEN0038630 D DE N0038630D DE 665323 C DE665323 C DE 665323C
Authority
DE
Germany
Prior art keywords
rueckkopplungssperre
hybrid
provided
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
Application number
DEN38630D
Other languages
German (de)
Inventor
Ir Frank De Fremery
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.)
Philips Intellectual Property and Standards GmbH
Original Assignee
Philips Intellectual Property and Standards GmbH
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.)
Filing date
Publication date
Application filed by Philips Intellectual Property and Standards GmbH filed Critical Philips Intellectual Property and Standards GmbH
Priority to DEN38630D priority Critical patent/DE665323C/en
Application granted granted Critical
Publication of DE665323C publication Critical patent/DE665323C/en
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/58Anti-side-tone circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/20Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Interconnection arrangements not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
    • H04M9/10Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic with switching of direction of transmission by voice frequency
DEN38630D 1935-09-19 1935-09-19 provided with Rueckkopplungssperre hybrid Expired DE665323C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEN38630D DE665323C (en) 1935-09-19 1935-09-19 provided with Rueckkopplungssperre hybrid

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
NL46308D NL46308C (en) 1935-09-19
DEN38630D DE665323C (en) 1935-09-19 1935-09-19 provided with Rueckkopplungssperre hybrid
GB2523636A GB463178A (en) 1935-09-19 1936-09-16 Improvements in telephone, radio and like communication systems
FR810646D FR810646A (en) 1935-09-19 1936-09-17 Mounting fork having a device for suppressing the reaction, in particular in telephone transmissions
US101669A US2129990A (en) 1935-09-19 1936-09-19 Telephony

Publications (1)

Publication Number Publication Date
DE665323C true DE665323C (en) 1938-09-22

Family

ID=6540078

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN38630D Expired DE665323C (en) 1935-09-19 1935-09-19 provided with Rueckkopplungssperre hybrid

Country Status (5)

Country Link
US (1) US2129990A (en)
DE (1) DE665323C (en)
FR (1) FR810646A (en)
GB (1) GB463178A (en)
NL (1) NL46308C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976957C (en) * 1954-10-19 1965-03-11 Manfred Seiffert Device for electric underwater telephony

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE483501A (en) * 1947-03-13
FR1005063A (en) * 1947-05-29 1952-04-07 A device to prevent feedback in telephone installations speaker
CH271525A (en) * 1948-04-21 1950-10-31 Kaelin Pierre Poste for its transmission system.
US2623949A (en) * 1949-06-08 1952-12-30 Le Teleampliphone Soc Two-way loud-speaker telephone installation
US2694749A (en) * 1950-04-18 1954-11-16 Sepco 45 B D Sebastopol Communication system
US2629024A (en) * 1950-12-29 1953-02-17 Bell Telephone Labor Inc Unbalanced-to-ground two-to-fourwire connection
US3041411A (en) * 1958-06-10 1962-06-26 Donald C Beatty Automatic, circuit-condition-change-responsive, on-off control for loudspeaking telephone and the like
US3065300A (en) * 1958-09-30 1962-11-20 Modern Telephones Great Britai Loudspeaking telephone systems
NL125146C (en) * 1958-12-29
US3189690A (en) * 1960-04-27 1965-06-15 Modern Telephones Great Britai Two-way telephone systems with talk-listen switching
US3075045A (en) * 1960-08-29 1963-01-22 Bell Telephone Labor Inc Speakerphone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976957C (en) * 1954-10-19 1965-03-11 Manfred Seiffert Device for electric underwater telephony

Also Published As

Publication number Publication date
FR810646A (en) 1937-03-24
US2129990A (en) 1938-09-13
NL46308C (en)
GB463178A (en) 1937-03-23

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