BE557708A - - Google Patents

Info

Publication number
BE557708A
BE557708A BE557708DA BE557708A BE 557708 A BE557708 A BE 557708A BE 557708D A BE557708D A BE 557708DA BE 557708 A BE557708 A BE 557708A
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.)
Publication of BE557708A publication Critical patent/BE557708A/xx

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q5/00Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
    • H04Q5/08Signalling by continuous ac
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00Transducers of moving-armature or moving-core type
    • H04R11/14Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE557708D 1956-06-07 BE557708A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US589901A US2808463A (en) 1956-06-07 1956-06-07 Telephone signaling device

Publications (1)

Publication Number Publication Date
BE557708A true BE557708A (ja)

Family

ID=24360020

Family Applications (1)

Application Number Title Priority Date Filing Date
BE557708D BE557708A (ja) 1956-06-07

Country Status (7)

Country Link
US (1) US2808463A (ja)
BE (1) BE557708A (ja)
CH (1) CH355186A (ja)
DE (1) DE1037327B (ja)
FR (1) FR1173274A (ja)
GB (1) GB822098A (ja)
NL (1) NL112535C (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL212181A (ja) * 1955-11-14
BE563510A (ja) * 1956-12-28
US3026377A (en) * 1957-10-10 1962-03-20 Bell Telephone Labor Inc Compatible ringing circuit
US2951910A (en) * 1958-01-14 1960-09-06 North Electric Co Substation signalling device
DE1120948B (de) * 1959-01-29 1961-12-28 Siemens Ag Elektroakustischer Schallsender
DK94303C (da) * 1959-05-23 1962-09-10 Philips Nv Apparat til afgivelse af et akustisk signal, for eksempel et kaldesignal.
GB956356A (en) * 1960-07-21 1964-04-22 Standard Telephones Cables Ltd Improvements in or relating to signalling methods between subscriber's sets and exchage
US3254161A (en) * 1963-01-17 1966-05-31 North Electric Co Ringing arrangement for substation telephone instrument
US3808379A (en) * 1972-05-30 1974-04-30 Gte Automatic Electric Lab Inc Telephone tone ringer
JPS5330296A (en) * 1976-09-01 1978-03-22 Seiko Instr & Electronics Ltd Electro-acoustic transducer
US4103452A (en) * 1976-12-13 1978-08-01 Wood Richard G Child's telephone apparatus
USRE31398E (en) * 1977-10-19 1983-09-27 Floyd Bell Associates, Inc. Electronic audio signalling device for telephones
US4157459A (en) * 1977-10-19 1979-06-05 Floyd Bell Associates Inc. Electronic audio signalling device for telephones
US4214131A (en) * 1978-12-18 1980-07-22 Floyd Bell Associates Inc. Electronic audio signalling device for telephones
IT1127993B (it) * 1980-01-29 1986-05-28 Cselt Centro Studi Lab Telecom Suoneria telefonica di tipo digitale
US4728933A (en) * 1986-03-24 1988-03-01 U.S. Holding Company, Inc. Miniature dual cavity ringer

Also Published As

Publication number Publication date
CH355186A (de) 1961-06-30
GB822098A (en) 1959-10-21
US2808463A (en) 1957-10-01
NL112535C (ja)
FR1173274A (fr) 1959-02-23
DE1037327B (de) 1958-08-21

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