FR660791A - Perfectionnements aux appareils sonores ou trompes acoustiques - Google Patents

Perfectionnements aux appareils sonores ou trompes acoustiques

Info

Publication number
FR660791A
FR660791A FR660791DA FR660791A FR 660791 A FR660791 A FR 660791A FR 660791D A FR660791D A FR 660791DA FR 660791 A FR660791 A FR 660791A
Authority
FR
France
Prior art keywords
sound devices
acoustic tubes
acoustic
tubes
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.)
Expired
Application number
Other languages
English (en)
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.)
Compagnie des Freins Westinghouse
Original Assignee
Compagnie des Freins Westinghouse
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 Compagnie des Freins Westinghouse filed Critical Compagnie des Freins Westinghouse
Application granted granted Critical
Publication of FR660791A publication Critical patent/FR660791A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
    • G10K9/04—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated by compressed gases, e.g. compressed air

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating Pumps (AREA)
FR660791D 1927-10-04 1928-09-21 Perfectionnements aux appareils sonores ou trompes acoustiques Expired FR660791A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223922A US1690177A (en) 1927-10-04 1927-10-04 Sound producer

Publications (1)

Publication Number Publication Date
FR660791A true FR660791A (fr) 1929-07-17

Family

ID=22838535

Family Applications (1)

Application Number Title Priority Date Filing Date
FR660791D Expired FR660791A (fr) 1927-10-04 1928-09-21 Perfectionnements aux appareils sonores ou trompes acoustiques

Country Status (3)

Country Link
US (1) US1690177A (fr)
CH (1) CH133351A (fr)
FR (1) FR660791A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392369A (en) * 1958-04-01 1968-07-09 Textron Electronics Inc Fluid-actuated, dual piston, underwater sound generator
US4102297A (en) * 1977-04-15 1978-07-25 Leslie Co. Acoustical signal apparatus
IL149449A0 (en) * 2002-05-02 2002-11-10 Rosenberg Peretz Sound making devices and their use in animal control of damage to crops

Also Published As

Publication number Publication date
US1690177A (en) 1928-11-06
CH133351A (fr) 1929-05-31

Similar Documents

Publication Publication Date Title
FR657396A (fr) Perfectionnements aux appareils reproducteurs de sons
FR666922A (fr) Perfectionnements aux appareils acoustiques
FR650448A (fr) Perfectionnements aux appareils électro-thérapeutiques
FR660791A (fr) Perfectionnements aux appareils sonores ou trompes acoustiques
FR670068A (fr) Perfectionnements aux appareils acoustiques à membranes sonores
FR36844E (fr) Perfectionnements aux appareils piezoélectriques
FR645452A (fr) Perfectionnements apportés aux appareils téléphoniques
FR32969E (fr) Perfectionnements aux appareils piézo-électriques
FR653662A (fr) Perfectionnements apportés aux appareils actionnés thermomagnétiquement
FR638449A (fr) Perfectionnements aux appareils de bobinage
FR35192E (fr) Perfectionnements aux dispositifs acoustiques
FR653609A (fr) Perfectionnements apportés aux appareils producteurs de sons
FR627933A (fr) Perfectionnements aux cornets acoustiques
FR643336A (fr) Perfectionnements aux conduits acoustiques
FR637511A (fr) Perfectionnements aux hauts-parleurs et autres appareils sonores
FR631244A (fr) Perfectionnements aux appareils dits
FR672594A (fr) Perfectionnements aux appareils de sondage acoustique
FR34017E (fr) Perfectionnements aux appareils piezoelectriques
FR33775E (fr) Perfectionnements aux appareils piézo-électriques
FR645103A (fr) Perfectionnements aux téléphones acoustiques
FR642986A (fr) Perfectionnements aux appareils cinématographiques
FR647748A (fr) Perfectionnements apportés aux appareils cinématographiques
FR33497E (fr) Perfectionnements aux appareils cinématographiques
FR696762A (fr) Perfectionnements aux appareils électro-acoustiques
FR648162A (fr) Perfectionnements aux appareils à reproduire les sons