US3089458A - Centrifugal acceleration siren device - Google Patents

Centrifugal acceleration siren device Download PDF

Info

Publication number
US3089458A
US3089458A US799182A US79918259A US3089458A US 3089458 A US3089458 A US 3089458A US 799182 A US799182 A US 799182A US 79918259 A US79918259 A US 79918259A US 3089458 A US3089458 A US 3089458A
Authority
US
United States
Prior art keywords
rotor
surface portion
casing
passageways
cylindrical
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
US799182A
Inventor
Dory Jacques
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.)
Realisations Ultrasoniques SA
Original Assignee
Realisations Ultrasoniques SA
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 Realisations Ultrasoniques SA filed Critical Realisations Ultrasoniques SA
Application granted granted Critical
Publication of US3089458A publication Critical patent/US3089458A/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
    • G10K7/00—Sirens
    • G10K7/005—Ultrasonic sirens
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S116/00—Signals and indicators
    • Y10S116/18—Wave generators

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Centrifugal Separators (AREA)

Description

May 14, 1963 .1. DORY 3,08 58 CENTRIFUGAL ACCELERATION SIREN DEVICE Filed March 15, 1959 United States Patent Ofiice 3,089,458 Patented May 14, 1963 3,089,458 CENTRIFUGAL ACCELERATION SIREN DEVICE Jacques Dory, Villenoy par Meaux, France, assignor to Realisations Ultrasoniques, Villenoy par Meaux,
France, a corporation Filed Mar. 13, 1959, Ser. No. 799,182 Claims priority, application France Mar. 14, 1958 4 Claims. (Cl. 116-147) The present invention relates to siren devices and, more particularly, to sirens adapted to provide a powerful sonic or supersonic output.
It would be highly desirable to provide high output ultrasonic siren devices, adapted, for instance, for the precipitation of industrial fogs and smokes, and, in the case of liquid operated sirens, for ultrasonic cleaning.
It is an object of the invention to provide a high output siren arranged in such a manner that the operating fluid, at the instant of reaching the exhaust apertures, is given a considerable centrifugal acceleration.
The siren according to the invention comprises essentially a rotor member contained in a casing and provided with an axial inlet opening for receiving the operating fluid and with radially extending channels connected, at their axial end, to said opening, and running, at their peripheral end, past a plurality of apertures, or, preferably past a single aperture forming the inlet of a discharge nozzle projecting through said casing substantially tangentially to said rotary element.
The invention will be best understood from the following specification and appended drawings, in which:
FIG. 1 is a view showing diagrammatically one embodiment of the invention, partly in cross-section, and
FIG. 2 is a sectional view along axis XX of FIG. 1.
Referring to the drawings, it is seen that rotor 1 is driven in the direction of the arrow by an overhung shaft 2 actuated by motor 3.
The incoming air (or other fluid) enters the device by an axial opening 4 and is drawn into the radially extending channels 5 of the rotor, which are preferably in tangential relationship to said axial opening as shown in FIG. 2, in order to increase the accelerating effect on the air subjected to the centrifugal force. For the same reason, nozzle unit 69, as it clearly appears on the drawing, is substantially tangential to the periphery of rotor 1.
As a purely illustrative example, opening 4 has a diameter of 5 cm. and rotor 1 has a diameter of 35 cm. and comprises 30 channels 5. The motor rotates at a speed of 24,000 r.p.m., so that the frequency of the ultrasonic pressure wave transmitted by the device is 12 kc./s.
The air, accelerated in the channels of the rotor, which behaves like a centrifugal compressor, reaches in this example, a speed of about 400 m./ s. at the inlet opening 6 of the nozzle (a speed which is significant of the exceptional performance of the device).
The nozzle preferably consists of a first cylindrical section 7 followed by a frusto-conical section 8 and by a second cylindrical section 9. Preferably, the half angle of the frusto-conical section will not exceed 7. This nozzle structure, when the three sections are properly dimensioned, enables the speed of the output air pulses to be reduced to a value of 100 m./s., whereby a pressure 2 of the order of 4 kg./cm. may be attained at the outlet of the nozzle. In the above example, it has been obtained an output of 5 kw., with a power efficiency of about 25%. However much higher outputs may be obtained with sirens having similar structures.
The gap between rotor 1 and casing 10 is as small as possible and is provided with staggered joints such as 11, adapted to reduce leakages as much as possible, while not interfering with the rotation of the rotor.
It is to be understood that variations and modifications can be carried out without departing from the spirit of the invention.
What is claimed is:
l. A siren device comprising a casing and a rotor having an axial inlet chamber and an outer surface parallel to the inner surface of said casing, centrifugal flow passageways in said rotor extending in straight lines therethrough from said axial inlet chamber to a cylindrical surface portion of the rotor periphery, at least one elongated discharge nozzle projecting through said casing from an inlet opening in said cylindrical surface portion substantially tangentially thereto said cylindrical surface portion being coaxial with a corresponding cylindrical surface portion of the inner surface of the casing and the ends of said passageways being directly adjacent to said cylindrical inner surface portion, whereby the centrifugal flow from said passageways, when said rotor is rotating, will directly discharge by impulses through said inlet opening.
2. A siren device comprising a casing and a rotor having an axial inlet chamber and an outer surface parallel to the inner surface of said casing, centrifugal flow passageways in said rotor extending in straight lines therethrough from said axial inlet chamber to a cylindrical surface portion of the rotor periphery, at least one elongated discharge nozzle projecting through said casing from an inlet opening in said cylindrical surface portion substantially tangentially thereto said cylindrical surface portion being coaxial with a corresponding cylindrical surface portion of the inner surface of the casing and the ends of said passageways being directly adjacent to said cylindrical inner surface portion, and means for preventing leakage of the flow in the clearance gap between said parallel inner and outer surfaces, whereby the centrifugal flow from said passageways, when said rotor is rotating, will directly discharge by impulses through said inlet opening.
3. A siren device comprising a casing and a rotor having an axial inlet chamber and an outer surface parallel to the inner surface of said casing, centrifugal flow passageways in said rotor extending in straight lines therethrough tangentially to said axial inlet chamber, from said axial inlet chamber to a cylindrical surface portion of the rotor periphery, at least one elongated discharge nozzle projecting through said casing from an inlet opening in said cylindrical surface portion substantially tangentially thereto, said cylindrical surface portion being coaxial with a corresponding cylindrical surface portion of the inner surface of the casing and the ends of said passageways being directly adjacent to said cylindrical inner surface portion, whereby the centrifugal flow from said passageways, when said rotor is rotating, will directly discharge by impulses through said inlet opening.
4. A siren device comprising a casing and a rotor having an axial inlet chamber and an outer surface parallel to the inner surface of said casing, centrifugal flow passageways in said rotor extending in straight lines therethrough from said axial inlet chamber to a cylindrical surface portion of the rotor periphery, at least one elongated discharge nozzle projecting through said casing from an inlet opening in said cylindrical surface portion substantially tangentially thereto said cylindrical surface portion being coaxial with a corresponding cylindrical surface portion of the inner surface of the casing and the ends of said passageways being directly adjacent to said cylindrical inner surface portion, whereby the centrifugal flow from said passageways, when said rotor is rotating, will directly discharge by impulses through 4 said inlet opening, said nozzle comprising a first cylindrical section, a frustoconical section connected to said first cylindrical section and a second cylindrical section connected to said frustoconical section.
References Cited in the file of this patent UNITED STATES PATENTS

Claims (1)

1. A SIREN DEVICE COMPRISING A CASING AND A ROTOR HAVING AN AXIAL INLET CHAMBER AND AN OUTER SURFACE PARALLEL TO THE INNER SURFACE OF SAID CASING, CENTRIFUGAL FLOW PASSAGEWAYS IN SAID ROTOR EXTENDING IN STRAIGHT LINES THERETHROUGH FROM SAID AXIAL INLET CHAMBER TO A CYLINDRICAL SURFACE PORTION OF THE ROTOR PERIPHERY, AT LEAST ONE ELONGATED DISCHARGE NOZZLE PROJECTING THROUGH SAID CASING FROM AN INLET OPENING IN SAID CYLINDRICAL SURFACE PORTION SUBSTANTIALLY TANGENTIALLY THERETO SAID CYLINDRICAL SURFACE PORTION BEING COAXIAL WITH A CORRESPONDINGG CYLINDRICAL SURFACE PORTION OF THE INNER SURFACE OF THE CASING AND THE ENDS OF SAID PASSAGEWAYS BEING DIRECTLY ADJACENT TO SAID CYLINDRICAL INNER SURFACE PORTION, WHEREBY THE CENTRIFUGAL FLOW FROM SAID PASSAGEWAYS, WHEN SAID ROTOR IS ROTATING, WILL DIRECTLY DISCHARGE BY IMPULSES THROUGH SAID INLET OPENING.
US799182A 1958-03-14 1959-03-13 Centrifugal acceleration siren device Expired - Lifetime US3089458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR3089458X 1958-03-14

Publications (1)

Publication Number Publication Date
US3089458A true US3089458A (en) 1963-05-14

Family

ID=9691760

Family Applications (1)

Application Number Title Priority Date Filing Date
US799182A Expired - Lifetime US3089458A (en) 1958-03-14 1959-03-13 Centrifugal acceleration siren device

Country Status (1)

Country Link
US (1) US3089458A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344766A (en) * 1965-10-18 1967-10-03 Eric C Cottell Rotating liquid whistle
US3385392A (en) * 1965-09-08 1968-05-28 Vios Michalis Ultrasonic siren applied on seagoing ships for defogging the ranges of vision
US3723781A (en) * 1969-08-27 1973-03-27 Metabowerke Kg Electromotor
US20040200401A1 (en) * 2003-04-08 2004-10-14 Giebeler James Frederick Reverberating mechanical siren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1618210A (en) * 1925-09-17 1927-02-22 John H Rosseter Siren
US1624587A (en) * 1921-10-05 1927-04-12 Decot Theodore Siren
GB471316A (en) * 1936-03-20 1937-09-01 Olof Ingemar Harald Ekman Improvements in sirens
US2460122A (en) * 1944-11-22 1949-01-25 Arthur W Burks Pump
US2528515A (en) * 1946-01-04 1950-11-07 Specialties Dev Corp Siren
US2755767A (en) * 1951-07-10 1956-07-24 Centre Nat Rech Scient High power generators of sounds and ultra-sounds

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1624587A (en) * 1921-10-05 1927-04-12 Decot Theodore Siren
US1618210A (en) * 1925-09-17 1927-02-22 John H Rosseter Siren
GB471316A (en) * 1936-03-20 1937-09-01 Olof Ingemar Harald Ekman Improvements in sirens
US2460122A (en) * 1944-11-22 1949-01-25 Arthur W Burks Pump
US2528515A (en) * 1946-01-04 1950-11-07 Specialties Dev Corp Siren
US2755767A (en) * 1951-07-10 1956-07-24 Centre Nat Rech Scient High power generators of sounds and ultra-sounds

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385392A (en) * 1965-09-08 1968-05-28 Vios Michalis Ultrasonic siren applied on seagoing ships for defogging the ranges of vision
US3344766A (en) * 1965-10-18 1967-10-03 Eric C Cottell Rotating liquid whistle
US3723781A (en) * 1969-08-27 1973-03-27 Metabowerke Kg Electromotor
US20040200401A1 (en) * 2003-04-08 2004-10-14 Giebeler James Frederick Reverberating mechanical siren
US7066106B2 (en) * 2003-04-08 2006-06-27 James Frederick Giebeler Reverberating mechanical siren

Similar Documents

Publication Publication Date Title
US2925952A (en) Radial-flow-compressor
US1061206A (en) Turbine.
US2570081A (en) Apparatus for producing highintensity ultrasonic waves
US2567079A (en) Gas turbine power plant
US3089458A (en) Centrifugal acceleration siren device
US3977811A (en) Air pump for use in dusty environment
US2375203A (en) Dust separator
US1839126A (en) Impeller
US2999628A (en) Low pressure compressor
US2640678A (en) Fluid translating device
US3828553A (en) Turbine having powered inner rotor for imparting additional velocity to entering fluid
US3071313A (en) Compressor construction
US3302395A (en) Debris separator for aircraft gas turbine engines
US2807217A (en) Fluid compressor
US3131877A (en) Pump
US3182710A (en) Turbine driven supersonic industrial oil burner
US3540834A (en) Apparatus for pumping liquids containing solids
ES370648A1 (en) Dynamoelectric machine
GB1282803A (en) Centrifugal liquid vane type compressor
US2129808A (en) Blower
USRE31259E (en) Two-stage turbo compressor
GB560172A (en) Improvements in centrifuges for separating solid particles from gases
US2571711A (en) Fluid pump
US2420840A (en) Gas purifier and compressor
US3216649A (en) Generators of rotating flow patterns