US2787786A - Sound producers - Google Patents

Sound producers Download PDF

Info

Publication number
US2787786A
US2787786A US364734A US36473453A US2787786A US 2787786 A US2787786 A US 2787786A US 364734 A US364734 A US 364734A US 36473453 A US36473453 A US 36473453A US 2787786 A US2787786 A US 2787786A
Authority
US
United States
Prior art keywords
disc
diaphragm
vibratory
center
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 - Lifetime
Application number
US364734A
Other languages
English (en)
Inventor
Zeininger Gustav
Issler Jorg
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US2787786A publication Critical patent/US2787786A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices 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
    • G10K1/062—Devices 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
    • 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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/20—Sounding members

Definitions

  • the invention relates to a sound producer having a diaphragm which is set vibrating by periodic power impulses and which is connected centrally with a substantially even circular vibratory disc, more particularly to a signal horn for mechanically propelled vehicles.
  • the effect of a vibratory disc on the strength and audibility of the sound waves emitted may be improved in a surprising manner if it is reinforced in its freely vibrating marginal area in accordance with the present invention.
  • Sound producers are also already known in which there is provided instead of an even circular vibratory disc, a at vibratory beam which is tapered in cross section on both sides of a central attachment point in order to give greater elasticity to both its arms.
  • These vibratory beams have comparatively accurately defined vibration and depend substantially only on the diaphragm for the formation of the sound waves.
  • the vibratory disc constructed in accordance with the invention on the other hand also acts directly as a radiating surface which transmits energy in vibrations particularly in the high frequencies.
  • Fig. 1 is a diagrammatic sectional view through an electromagnetically actuated horn
  • Fig. 2 is a front view of the vibratory disc
  • Fig. 3 is a cross section on line III--III of Fig. 2, and
  • Fig. 4 is a view similar to Fig. l and showing the armature impinging on the core.
  • An electro-magnet 2 is mounted in a casing 1 and is excited periodically in a manner not shown in greater detail. Opposite the poles of the electro-magnet 2 is disposed an armature 3 which is firmly connected thereto with a bolt 4. On the bolt are also secured a diaphragm 5 and a vibratory disc 6.
  • the diaphragm 5 which is illustrated in the drawing as an even at diaphragm, but could equally well be a diaphragm provided with annular corrugations, is firmly gripped on its outer periphery between a marginal section of the casing 1 and a closing ring 7, the inner edge of which extends into the vicinity of the outer edge of the vibratory disc 6.
  • the vibratory disc 6 On its outer edge, the vibratory disc 6 has a rim-like reinforcement 8 which projects out of the plane of the disc on one side.
  • the disc 6 is so mounted that the rim 8 is disposed on the side of the disc 6 turned away from the diaphragm 5 so that the disc may be disposed as near as possible to the diaphragm.
  • the inner edge 9 of the n'm of the disc 2,787,786 Patented Apr. 2, 1957 is inclined in a direction towards the middle of the disc whereby the mechanical durability of the disc, as also the formation of the vibration, is improved.
  • the diameter of the vibratory disc 6 is also an advantage for the diameter of the vibratory disc 6 to be greater than half of the diameter of the vibratory part of the diaphragm 5.
  • a diaphragm means for im parting periodic vibration exciting power impulses to the diaphragm, a vibratory disc disposed in confronting spaced relation to the diaphragm, means for connecting the center of said disc to the center of the diaphragm, said disc having a central portion of substantially uniform thickness and being reinforced in thickness in its marginal region.
  • a diaphragm means for imparting periodic vibration exciting power impulses to the diaphragm, a vibratory disc disposed in confronting relation to the diaphragm, means for connecting the center of said disc to the center of the diaphragm, said disc having an inner portion of substantially uniform thickness and a rim portion of increased thickness projecting from the disc in a direction away from the diaphragm, said rim portion having an inner surface inclined in a direction towards the center of the disc.
  • a diaphragm means for clamping the diaphragm at its marginal edge, means for imparting periodic vibration exciting power impulses to the central portion of the diaphragm, a vibratory disc disposed in face to face confronting relation with the diaphragm, means for connecting the center of said disc to the -central portion of the diaphragm, 'said disc having a center portion of substantially uniform thickness and a rim portion of increased thickness projecting from the disc in a direction away from the diaphragm, the disc yhaving a diameter greater than half the diameter of the vibrating center portion of the diaphragm.
  • a diaphragm means for imparting periodic vibration exciting power impulses to theydi-aphragm, a vibratory disc disposed in face to face confronting relation with the diaphragm, means for connecting the center of said disc lto the diaphragm, said disc having an inner portion of substantially uniform thickness and a rim portion of increased thickness projecting from the -disc ⁇ on only one side of the disc, the thickness ⁇ of the rim of the disc being approximately twice the thickness of the inner portion of the disc.
  • a vibratory disc disposed in confronting face to face spaced relation with the diaphragm, means for connecting the center of the disc to the center ⁇ of the vibrating diaphragm with ⁇ outer parts of the disc free to vibrate, said disc having ⁇ an inner portion of substantially uniform thickness and a rim portion of increased thickness projecting from the disc on only one side ⁇ of the disc, the radial width of the rim of the disc being less th-an one eighth of the diameter of the disc.
  • a disc shaped diaphragm means for imparting periodic vibration exciting power impulses to the diaphragm, a vibratory disc, means for clamping the marginal edge of the diaphragm so that only the center portion of the diaphragm can vibrate, means connecting the center of the disc to the center of the diaphragm and disposing the dise in spaced face to face relation with the diaphragm, said disc having -a diameter greater than half the diameter of the vibrating center portion of the diaphragm, said disc having a center portion of substantially uniform thickness and a rim portion having a thickness approximately twice the thickness of the inner portion, said rim portion having a radial width less than one eighth of the diameter of the disc, projecting from the disc in a direction away from the diaphragm, and having lan inner surface inclined in a direction towards the center of the disc.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Reciprocating Pumps (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
US364734A 1952-07-05 1953-06-29 Sound producers Expired - Lifetime US2787786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB21070A DE969187C (de) 1952-07-05 1952-07-05 Schallerzeuger fuer Signalzwecke

Publications (1)

Publication Number Publication Date
US2787786A true US2787786A (en) 1957-04-02

Family

ID=6960512

Family Applications (1)

Application Number Title Priority Date Filing Date
US364734A Expired - Lifetime US2787786A (en) 1952-07-05 1953-06-29 Sound producers

Country Status (9)

Country Link
US (1) US2787786A (fr)
AT (1) AT184490B (fr)
BE (1) BE521219A (fr)
CH (1) CH313481A (fr)
DE (1) DE969187C (fr)
DK (1) DK84709C (fr)
ES (1) ES209690A1 (fr)
FR (1) FR1083686A (fr)
GB (1) GB731642A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358084A (en) * 1964-02-17 1967-12-12 William J Ashworth Electromagnetic sound reproducer
EP0052975A1 (fr) * 1980-11-22 1982-06-02 LUCAS INDUSTRIES public limited company Boîtier d'avertisseur sonore et avertisseur sonore comportant un tel boîtier
FR2977062A1 (fr) * 2011-06-23 2012-12-28 Renault Sa Diffuseur pour avertisseur sonore de type a disque et avertisseur sonore comprenant un tel diffuseur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1226231A (fr) * 1958-07-16 1960-07-08 Magneti Marelli Spa Avertisseur électro-acoustique, en particulier pour véhicules automobiles
US3157151A (en) * 1962-04-25 1964-11-17 Westinghouse Electric Corp Ultrasonic generator
DE2261868C2 (de) * 1972-12-18 1982-03-04 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Akustischer Signalerzeuger, insbesondere Aufschlaghorn

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE346355C (fr) *
US1523964A (en) * 1922-12-26 1925-01-20 Bosch Robert Signaling instrument
US1737883A (en) * 1924-02-20 1929-12-03 Signal Ges Mit Beschankter Haf Diaphragm especially for sound receiving and radiating apparatus
US1940150A (en) * 1930-01-02 1933-12-19 George J Seiss Automobile horn
US2046772A (en) * 1929-06-29 1936-07-07 Gen Motors Corp Sound signal
US2228677A (en) * 1938-06-11 1941-01-14 Sparks Withington Co Warning signal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE381250C (de) * 1923-09-18 Robert Bosch Akt Ges Akustisches Signalinstrument
US1759443A (en) * 1925-07-10 1930-05-20 North East Appliance Corp Electromagnetic horn
US1750348A (en) * 1925-07-10 1930-03-11 North East Appliance Corp Electric horn
DE441898C (de) * 1926-03-04 1927-03-19 Sparks Withington Company Elektromagnetische Hupe, bei welcher ausser der Schallplatte eine mit dieser fest verbundene Vibrationsscheibe durch einen Elektromagneten in Schwingungen versetzt wird
AT124847B (de) * 1929-08-31 1931-10-10 Bosch Robert Elektromagnetische Hupe, insbesondere für Fahrzeuge.
DE578551C (de) * 1931-10-20 1933-06-15 Herm Riemann Fa Magnethorn

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE346355C (fr) *
US1523964A (en) * 1922-12-26 1925-01-20 Bosch Robert Signaling instrument
US1737883A (en) * 1924-02-20 1929-12-03 Signal Ges Mit Beschankter Haf Diaphragm especially for sound receiving and radiating apparatus
US2046772A (en) * 1929-06-29 1936-07-07 Gen Motors Corp Sound signal
US1940150A (en) * 1930-01-02 1933-12-19 George J Seiss Automobile horn
US2228677A (en) * 1938-06-11 1941-01-14 Sparks Withington Co Warning signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358084A (en) * 1964-02-17 1967-12-12 William J Ashworth Electromagnetic sound reproducer
EP0052975A1 (fr) * 1980-11-22 1982-06-02 LUCAS INDUSTRIES public limited company Boîtier d'avertisseur sonore et avertisseur sonore comportant un tel boîtier
FR2977062A1 (fr) * 2011-06-23 2012-12-28 Renault Sa Diffuseur pour avertisseur sonore de type a disque et avertisseur sonore comprenant un tel diffuseur

Also Published As

Publication number Publication date
FR1083686A (fr) 1955-01-11
CH313481A (de) 1956-05-31
GB731642A (en) 1955-06-08
DE969187C (de) 1958-05-08
DK84709C (da) 1958-04-08
BE521219A (fr) 1953-07-31
ES209690A1 (es) 1954-08-01
AT184490B (de) 1956-01-25

Similar Documents

Publication Publication Date Title
US3761956A (en) Sound generating device
US2732907A (en) Sound transducers
GB1429828A (en) Ultrasonic device
US3638052A (en) Electroacoustic transducers of the bilaminar flexural vibrating type
US4330878A (en) Sound producing device for watches
US6466676B2 (en) Compound driver for acoustical applications
US3886546A (en) Electric horn
US1698804A (en) Signaling device
US4580015A (en) Loud speaker with minimized magnetic leakage
US2820107A (en) Electro-mechanical signal transducers
US2769161A (en) Cone microphone
WO1987004289A1 (fr) Klaxon acoustique a event ameliore pour vehicules
US3042913A (en) Electroacoustic warning horn for motor vehicles
GB731642A (en) Improvements in or relating to sound producers
US1667418A (en) Subaqueous sound-signaling apparatus
US1632331A (en) Submarine sound receiver
US3292571A (en) Audible signal apparatus
FR2267602A1 (en) Resonator plate for motor vehicle horn - has diameter greater than that of vibrating membrane
US2407256A (en) Submarine signaling apparatus
US2158209A (en) Sound signaling
JP4075244B2 (ja) スピーカ
US2437282A (en) Electroacoustical transducer
US1035745A (en) Alarm or acoustic apparatus.
US1322229A (en) Kowski
US4142186A (en) Means for improving the electroacoustical properties of a buzzer