Signals and indicators – Horns – whistles and compressional wave generators – Diaphragm horns
Patent
1994-04-28
1995-10-24
Cuchlinski, Jr., William A.
Signals and indicators
Horns, whistles and compressional wave generators
Diaphragm horns
116142R, G10K 904
Patent
active
054601169
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This application is a national phase of PCT/HU92/00043 filed 30 Oct. 1992 and based, in turn, on Hungarian national application 3409/91 filed 30 Oct. 1991 under the International Convention.
FIELD OF THE INVENTION
The present invention relates to a sport horn provided with a pressure tube, a membrane and a sound tube, wherein both the pressure tube and the sound tube are in connection with said membrane.
BACKGROUND OF THE INVENTION
The horns of the art produce a sound by the membrane, which is vibrated by a pressure fluid, generally air. Such horns are generally used as ship horns or sirens in factories etc. Accordingly, they are generally of considerable dimensions and weight, thus a relatively high pressure is needed for producing a very strong sound.
The Hungarian patent 89 973, 95 819, 98 353, 100 289 and 101 300 all disclose such horns. The membranes of these horns are of metal sheets and are prestressed. The pipe introducing the pressure fluid is always arranged at the central part of the membrane, meanwhile a sound tube or horn is coaxial with the pressure tube and the end thereof bearing the membrane is arranged around the pressure tube.
On the other hand, people at sporting events, (for instance football matches) or festivals often use horns made of paper.
These horns produce, however, a rather poor sound.
OBJECT OF THE INVENTION
The object of the present invention is therefor to provide a horn, which is small, light and of simple construction, but is able to produce a considerable sound, when blown by the mouth.
SUMMARY OF THE INVENTION
Accordingly, the present invention provides to a horn having a pressure tube, a membrane and a sound tube, wherein both the pressure tube and the sound tube are in connection with said membrane. According to the invention the membrane is stretched out on the front face of the pressure tube, the sound tube is arranged within and coaxial with the pressure tube and its front face rests flat against the central part of the membrane. An annular air gap is arranged between the outer surface of the sound tube and the inner surface of the pressure tube, said gap being closed at the end opposite to the membrane and there is a sound hole in the wall of the pressure tube.
Both the pressure tube and the sound tube are straight tubes arranged coaxially. The end part of the pressure tube may have a diameter at the membrane, which is greater than that of the other end part.
The thickness of the membrane is preferably between 0,01 and 2 mm and is a plastic foil.
The sound tube may be provided with one or more extension tubes. The width of the air gap is preferably at least 0,2 mm, meanwhile the diameter of the sound hole is preferably between 0,2 and 50 mm.
The invention is based on the recognition that a very strong sound may be produced, when a rather thin and elastic membrane is applied and a pressure fluid is guided to the outer annular part of the membrane instead of the central part thereof. In this way, the membrane may be vibrated easily and the produced sound is rather strong.
BRIEF DESCRIPTION OF THE DRAWING
Further details and advantages of the present invention will be explained by way of an example with reference to the accompanying drawing, the sole Figure of which is an axial section of the horn.
SPECIFIC DESCRIPTION
The horn according to the drawing consists of a pressure tube 1, a sound tube 2, a membrane 4, a retainer ring 5 and a locking collar 6.
All the tubes and rings are cylindrical and coaxial. Instead of locking collar 6, the pressure tube 1 and/or the sound tube 2 may be provided with an appropriate flange for closing the space between pressure tube 1 and sound tube 2. This space, which is actually an air gap 3, is closed on the other end of the horn by membrane 4.
The membrane 4 is stretched out on the front faces of pressure tube 1 and sound tube 2 and is hold by retainer ring 5. The membrane 4 is stretched out in order to be prestressed, when fixed by the retainer ring 5.
The end of sound tube
REFERENCES:
patent: 870074 (1907-11-01), Astrom
patent: 1655675 (1928-01-01), Cunningham
patent: 1679011 (1928-07-01), Widmyer
patent: 2918895 (1959-12-01), Buell
patent: 4686928 (1987-08-01), Weisenberger
patent: 4706295 (1987-11-01), Putnam
patent: 4970983 (1990-11-01), LeBlanc et al.
Cuchlinski Jr. William A.
Dubno Herbert
Worth Willie Morris
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