GB473806A - Improvements in sirens - Google Patents
Improvements in sirensInfo
- Publication number
- GB473806A GB473806A GB29427/36A GB2942736A GB473806A GB 473806 A GB473806 A GB 473806A GB 29427/36 A GB29427/36 A GB 29427/36A GB 2942736 A GB2942736 A GB 2942736A GB 473806 A GB473806 A GB 473806A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragms
- pressure
- apertures
- central portion
- receptacle
- 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
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
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Details Of Valves (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
473,806. Foghorns. EKMAN, O. I. H. Oct. 29, 1936, No. 29427. Convention date, Oct. 29, 1935. [Class 13] [Also in Group XXXIX] In a foghorn operated by compressed fluid, a plurality of diaphragms, vibrated either in groups or simultaneously, form parts of the wall of a receptacle for the fluid and are alternately subjected to the pressure prevailing in the receptacle and relieved from the pressure by a rotatable slide valve located adjacent the wall. As shown, the valve comprises a central portion 4 mounted on a rotatable shaft 5 and an annular portion formed with apertures 6 alternating with radial grooves 7 which co-operate with radial passages 8 in the wall of the receptacle 1 to relieve the pressure to which the diaphragms 9 have been subjected. The diaphragms 9 which are supported on projections 18, 19 carried by a fixed central portion 10 and a flanged portion 12 of the casing 2, are formed with bent-up outer ends clamped between members 13, 14, Fig. 6, which are adjustably secured to the flange 12 by bolts 16. The central portion 10 is connected to the portion 12 by wedge-shaped beams 20 which are located between successive diaphragms 9 and form sound-projection channels communicating with the space between walls 21, 22 terminating in a horn which is preferably rotatable. In one modification, Figs. 7, 8 (not shown), the width of the apertures 6 and grooves 7 is substantially less than that of the diaphragms 9 with the object of providing an arrangement to produce a sound of increased frequency, and in a further modification, Figs. 10, 11 (not shown), the slide valve has four equally spaced apertures 6 which co-operate with twenty diaphragms 9, the pressure on any diaphragm between its successive actuations being relieved by the provision of a small hole under the edge of the diaphragm. In a further modification, Fig. 9 (not shown), in which the widths of the diaphragms 9 and apertures 6 are approximately equal, the supporting members 20 are provided with projections which limit the application of the pressure to the central portion of each diaphragm.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE473806X | 1935-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB473806A true GB473806A (en) | 1937-10-20 |
Family
ID=20310362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29427/36A Expired GB473806A (en) | 1935-10-29 | 1936-10-29 | Improvements in sirens |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB473806A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0178854A2 (en) * | 1984-10-15 | 1986-04-23 | Deere & Company | Ultrasonic horn assembly |
US4713799A (en) * | 1984-10-15 | 1987-12-15 | Deere & Company | Ultrasonic horn with sidelobe suppressing centerpiece |
-
1936
- 1936-10-29 GB GB29427/36A patent/GB473806A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0178854A2 (en) * | 1984-10-15 | 1986-04-23 | Deere & Company | Ultrasonic horn assembly |
EP0178854A3 (en) * | 1984-10-15 | 1987-04-15 | Deere & Company | Ultrasonic horn assembly |
US4713799A (en) * | 1984-10-15 | 1987-12-15 | Deere & Company | Ultrasonic horn with sidelobe suppressing centerpiece |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB473806A (en) | Improvements in sirens | |
FR2092349A5 (en) | ||
US1844487A (en) | Diaphragm | |
US2579784A (en) | Vibrator | |
GB1173623A (en) | Dynamic Moving Coil Microphone. | |
US1722814A (en) | Press cylinder | |
US2079694A (en) | Acoustic amplifier | |
GB460740A (en) | Improvements in sirens | |
GB261437A (en) | Improvements in steam condensers | |
US2174125A (en) | Siren | |
US1751356A (en) | Diaphragm | |
US2057498A (en) | Straining or separating equipment | |
US1621670A (en) | Sound-box diaphragm for use in telephones, loud speakers, acoustic apparatus, and the like | |
US1670777A (en) | Acoustic device | |
GB651063A (en) | Improvements in or relating to fluid-tight mountings for pipes | |
GB285258A (en) | Improvements in apparatus for the colloidal dispersion of material in fluids | |
GB1449512A (en) | Disc for a disc brake | |
SU499470A1 (en) | Expander for low-capacity refrigeration unit | |
IE38356B1 (en) | Frequency multiplex apparatus | |
SU107501A1 (en) | Unidirectional condenser microphone | |
SU369734A1 (en) | HARNESS SPEAKER | |
GB849452A (en) | Siren | |
GB106431A (en) | Improvements in and relating to Pistons for Telemotors, and other Hydraulic, Steam or other Fluid Pressure Apparatus. | |
SU840468A1 (en) | Membrane compressor | |
GB686493A (en) | Improvements in or relating to flexible piston rings |