GB475510A - Improvements in mechanical fan-operated sirens - Google Patents
Improvements in mechanical fan-operated sirensInfo
- Publication number
- GB475510A GB475510A GB1429336A GB1429336A GB475510A GB 475510 A GB475510 A GB 475510A GB 1429336 A GB1429336 A GB 1429336A GB 1429336 A GB1429336 A GB 1429336A GB 475510 A GB475510 A GB 475510A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fan
- chain
- disc
- pawl
- free
- 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
- G10K7/00—Sirens
- G10K7/02—Sirens in which the sound-producing member is rotated manually or by a motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/14—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of a driving or driven pulley
- F16H7/16—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of a driving or driven pulley without adjusting the driving or driven shaft
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
475,510. Sirens. BLANKMEISTER, O. May 20, 1936, No. 14293. [Class 13] The operating mechanism for a fan-operated siren is actuated by a pull on a chain or the like and incorporates a free-wheel device so that continual unidirectional rotation of the fan is produced by successive pulls on the chain. A gear-wheel 11 secured to a drum on which the chain 9 is wrapped, meshes with a pinion 12 which is free on a spindle 5 and carries an arm 13 provided with a slot engaged by a pin 14 on a pawl 16 pivoted on a disc 15. The lower end of the pawl frictionally engages a disc 17 rigid with the spindle 5 which carries the fan 2 provided with blades 3 which force air through adjustable peripheral openings 4 in the casing 1. On release of the chain, the drum rotates in the reverse direction under the action of the spring 8, whilst the pawl 16 is held clear of the disc 17, thus permitting free rotation of the fan 2. The device may be supported by a bracket or by a strap passing around the neck of the operator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1429336A GB475510A (en) | 1936-05-20 | 1936-05-20 | Improvements in mechanical fan-operated sirens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1429336A GB475510A (en) | 1936-05-20 | 1936-05-20 | Improvements in mechanical fan-operated sirens |
Publications (1)
Publication Number | Publication Date |
---|---|
GB475510A true GB475510A (en) | 1937-11-22 |
Family
ID=10038550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1429336A Expired GB475510A (en) | 1936-05-20 | 1936-05-20 | Improvements in mechanical fan-operated sirens |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB475510A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2465110A4 (en) * | 2009-08-10 | 2015-10-21 | Tyco Fire Products Lp | Siren |
-
1936
- 1936-05-20 GB GB1429336A patent/GB475510A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2465110A4 (en) * | 2009-08-10 | 2015-10-21 | Tyco Fire Products Lp | Siren |
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