GB134634A - - Google Patents
Info
- Publication number
- GB134634A GB134634A GB134634DA GB134634A GB 134634 A GB134634 A GB 134634A GB 134634D A GB134634D A GB 134634DA GB 134634 A GB134634 A GB 134634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- perforations
- tube
- wrightson
- sirens
- register
- 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.)
- Active
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
- G10K7/00—Sirens
- G10K7/02—Sirens in which the sound-producing member is rotated manually or by a motor
Abstract
134,634. Wrightson, T. G., Ringquist, J. M., and Head, Wrightson, & Co. Nov. 12, 1918. Sirens.-Sirens for signalling &c., of the kind comprising two perforated tubes 1, 4, one being capable of rotation to produce sounds and axial movement to stop the production of sound, are provided with a pipe 8 having one end closed and containing air so as to form a cushion and reduce vibration of the parts; or the perforations in the parallel rows are arranged in staggered lines, so that as a row of perforations in one tube is coming out of register with the perforations in the other, another row of perforations is going into register, whereby there is always a passage open for the escape of water. A reducing-wck 7 or other means is provided to regulate the pressure, which is independent of the note frequency. To produce different notes, there is a greater number of perforations in some rows than in others. In a modified construction, the rotating tube is placed within the stationary tube, the pressure medium being supplied to an annular chamber outside the stationary tube.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB134634A true GB134634A (en) |
Family
ID=1727984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB134634D Active GB134634A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB134634A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0121319A3 (en) * | 1983-03-31 | 1987-03-18 | Southern California Edison Company | Siren |
| US4807203A (en) * | 1983-03-31 | 1989-02-21 | Southern California Edison Co. | Siren |
-
0
- GB GB134634D patent/GB134634A/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0121319A3 (en) * | 1983-03-31 | 1987-03-18 | Southern California Edison Company | Siren |
| US4807203A (en) * | 1983-03-31 | 1989-02-21 | Southern California Edison Co. | Siren |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB134634A (en) | ||
| JP2021181078A (en) | Y-shaped liquefied gas filter and method for filtering particles in liquefied gas using the same | |
| US20030221906A1 (en) | Low-noise pressure reduction system | |
| US6294375B1 (en) | Microbiological pressurised gas control device | |
| Wisnoe et al. | Thermofluid-acoustic analysis of a Ranque-Hilsch vortex tube | |
| SE9801737D0 (en) | Sound attenuated blow nozzle | |
| US1530899A (en) | Whistle operated by steam or compressed gas and intended for use upon railroads or for navigation, aviation, or like purposes | |
| FR2275645A1 (en) | Silencer system partic for compressor exhausts - has twin chamber construction with sound absorbing linings and fillings | |
| GB189822768A (en) | Improvements in Methods of, and Apparatus for, Increasing the Volume of Sounds from Telephonic or Phonographic Instruments, and Transmitting such Sounds to Distances. | |
| US1752185A (en) | Acoustic apparatus, particularly signaling apparatus | |
| JPWO2020047295A5 (en) | ||
| US1710572A (en) | Sound amplifier | |
| GB189908677A (en) | Improvements in or relating to Pressure-regulating Valves. | |
| US736428A (en) | Sound-producing device suitable for sirens or like instruments. | |
| GB191109364A (en) | An Improved Fluid Pressure Relay for Amplifying Sounds. | |
| GB190920494A (en) | Apparatus for Producing Sulphur Dioxide for Fumigation and like purposes. | |
| FR2256390A1 (en) | Silencer for .22 calibre gun - has expansion chamber contg. nylon discs and springs to impede passage of gases to the air | |
| GB338941A (en) | Improvements in apparatus for the digestion of nitrocellulose or purification of cellulose | |
| GB190107696A (en) | Improvements in and relating to Valves | |
| Sahoo et al. | The sound of small bubbles popping in a droplet | |
| GB260561A (en) | Improvements relating to acoustic apparatus, particularly signalling apparatus | |
| US757308A (en) | Sostenuto device for stringed instruments. | |
| US1704840A (en) | Acoustic transformer | |
| US213443A (en) | Improvement in mechanical musical instruments | |
| Stirling | The Hegelian Calculus |