US3089458A - Centrifugal acceleration siren device - Google Patents
Centrifugal acceleration siren device Download PDFInfo
- 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
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- 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
Links
- 230000001133 acceleration Effects 0.000 title description 4
- 241000269400 Sirenidae Species 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
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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
Definitions
- the present invention relates to siren devices and, more particularly, to sirens adapted to provide a powerful sonic or supersonic output.
- 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.
- 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.
- rotor 1 is driven in the direction of the arrow by an overhung shaft 2 actuated by motor 3.
- nozzle unit 69 is substantially tangential to the periphery of rotor 1.
- 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 nozzle preferably consists of a first cylindrical section 7 followed by a frusto-conical section 8 and by a second cylindrical section 9.
- the half angle of the frusto-conical section will not exceed 7.
- 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.
- 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.
- 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.
- 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.
- 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.
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- 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.
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 |
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US (1) | US3089458A (en) |
Cited By (4)
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)
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 |
-
1959
- 1959-03-13 US US799182A patent/US3089458A/en not_active Expired - Lifetime
Patent Citations (6)
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)
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 |
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