IT500018A - - Google Patents

Info

Publication number
IT500018A
IT500018A IT500018DA IT500018A IT 500018 A IT500018 A IT 500018A IT 500018D A IT500018D A IT 500018DA IT 500018 A IT500018 A IT 500018A
Authority
IT
Italy
Application number
Other languages
Italian (it)
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 IT500018A publication Critical patent/IT500018A/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
    • 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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • 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
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H04R1/086—Protective screens, e.g. all weather or wind screens
IT500018D 1951-07-24 IT500018A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP5919A DE923354C (de) 1951-07-24 1951-07-24 UEberholungssignalanlage

Publications (1)

Publication Number Publication Date
IT500018A true IT500018A (fr)

Family

ID=6626604

Family Applications (1)

Application Number Title Priority Date Filing Date
IT500018D IT500018A (fr) 1951-07-24

Country Status (4)

Country Link
DE (1) DE923354C (fr)
FR (2) FR1047370A (fr)
GB (2) GB705450A (fr)
IT (1) IT500018A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2931020A (en) * 1955-07-11 1960-03-29 Thomas J Bender Secondary alarm system
DE1112927B (de) * 1956-05-08 1961-08-17 Tele F Lux Soc A R L Verfahren zur elektrischen UEbertragung von akustischen UEberholsignalen von Fahrzeugen
US3670689A (en) * 1970-03-20 1972-06-20 Falcon Safety Prod Tilt-operated hand held gas powered acoustic device
DE10003689C1 (de) * 2000-01-28 2001-05-23 Hella Kg Hueck & Co Schaltungsanordnung zur Leistungsanpassung einer Verstärkeranlage zur Erzielung eines annähernd konstanten Schalldruckpegels des Sondersignals für vorfahrtberechtigte Wegebenutzer
DE102017220474A1 (de) * 2017-11-16 2019-05-16 Robert Bosch Gmbh Vorrichtung zur luftschallakustischen Sensierung der Umgebung eines Fahrzeugs, Fahrzeug
EP3907502A1 (fr) * 2020-05-08 2021-11-10 ABB Schweiz AG Agencement de détection

Also Published As

Publication number Publication date
FR1047370A (fr) 1953-12-14
FR64910E (fr) 1955-12-14
GB705450A (en) 1954-03-10
GB717090A (en) 1954-10-20
DE923354C (de) 1955-02-10

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