DE297830C - - Google Patents

Info

Publication number
DE297830C
DE297830C DENDAT297830D DE297830DA DE297830C DE 297830 C DE297830 C DE 297830C DE NDAT297830 D DENDAT297830 D DE NDAT297830D DE 297830D A DE297830D A DE 297830DA DE 297830 C DE297830 C DE 297830C
Authority
DE
Germany
Prior art keywords
hollow body
horns
elastic membrane
closed hollow
sound
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.)
Active
Application number
DENDAT297830D
Other languages
German (de)
English (en)
Publication of DE297830C publication Critical patent/DE297830C/de
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/06—Audible signalling systems; Audible personal calling systems using hydraulic transmission; using pneumatic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Building Environments (AREA)
DENDAT297830D Active DE297830C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
DE297830C true DE297830C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=552098

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT297830D Active DE297830C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
DE (1) DE297830C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Similar Documents

Publication Publication Date Title
EP1467593A3 (de) Richtmikrofon
DE297830C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE278673C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US614594A (en) williamson
DE287865C (de) Telephonischer Wiedergabeapparat
US548487A (en) Filtering apparatus
DE83834C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US303554A (en) Stop-cock
AT111148B (de) Verfahren und Einrichtung zur Wiedergabe von Tönen.
DE43279C (de) Neuerungen an akustischen Signalapparaten
DE89410C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE1079997B (de) Druckmittelbetriebener Schallerzeuger
DE515286C (de) Akustische Signalvorrichtung
DE596437C (de) Hupe mit Antrieb durch Luftueber- oder -unterdruck
DE128111C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE226921C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE476788C (de) Einrichtung zur Erzeugung akustischer Schwingungen, bei welcher ein Luftstrom gegen eine schwingbare Platte geleitet wird, deren Schwingung den Austritt des Luftstromes abwechselnd mehr oder weniger drosselt
DE49835C (de) Tonveränderungsvorrichtung für Kindertrompeten
DE541811C (de) Pneumatische Vorrichtung fuer Musikinstrumente
AT17556B (de) Blasinstrument.
AT114595B (de) Membran-Schallsignal-Apparat.
AT42389B (de) Dämpfer für Blasinstrumente.
DE9686C (de) Neuerung an Nebelhörnern
US227125A (en) Bridge-gate
DE226756C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)