GB778318A - Improvements in or relating to temperature responsive signalling device - Google Patents
Improvements in or relating to temperature responsive signalling deviceInfo
- Publication number
- GB778318A GB778318A GB81455A GB81455A GB778318A GB 778318 A GB778318 A GB 778318A GB 81455 A GB81455 A GB 81455A GB 81455 A GB81455 A GB 81455A GB 778318 A GB778318 A GB 778318A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plug
- horn
- cylinder
- fusible
- metal
- 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
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/04—Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- General Physics & Mathematics (AREA)
- Safety Valves (AREA)
Abstract
778,318. Temperature alarms; warning horns. FYR-LARM CO., Inc. Jan. 11, 1955, No. 814/55. Class 13 and 118 (1). A reed horn 30, Fig. 2, may be sounded by pressure fluid escaping from a cylinder 10 if the ambient temperature rises to a predetermined degree, as on fire condition, to melt a readily releasable fusible plug 20, a safety valve 34 releasing fluid from the chamber 26 if the pressure therein rises above say 2 lb. per sq. inch. A metal plug 12 having an expansion chamber 18 opening to the horn is provided with a passage 15 leading to the. interior of the cylinder, and a metering hole 16 formed by an annular shoulder 16a and normally closed by the fusible metal plug 20. A skirt 21 with vent holes 22 surrounds the cylinder 10 to direct air around the plug 12. In a modification, Fig. 7, the safety valve comprising a movable reed plate 29<SP>1</SP> and a spring 37 is at the other end of the horn, and the protecting screen 31 may be replaced by a thin disc of metal 39 normally held over the end of the horn by a fusible ring 40, which ring melts before the plug 20 and allows the disc to fall off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB81455A GB778318A (en) | 1955-01-11 | 1955-01-11 | Improvements in or relating to temperature responsive signalling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB81455A GB778318A (en) | 1955-01-11 | 1955-01-11 | Improvements in or relating to temperature responsive signalling device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB778318A true GB778318A (en) | 1957-07-03 |
Family
ID=9710960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB81455A Expired GB778318A (en) | 1955-01-11 | 1955-01-11 | Improvements in or relating to temperature responsive signalling device |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB778318A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4608556A (en) * | 1983-07-04 | 1986-08-26 | Cole Martin T | Smoke detection apparatus |
GB2189065A (en) * | 1986-04-08 | 1987-10-14 | William Jackson Fernihough | Fire alarm |
GB2272987A (en) * | 1992-10-15 | 1994-06-01 | John Alfred Worthington | Gas driven alarm |
-
1955
- 1955-01-11 GB GB81455A patent/GB778318A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4608556A (en) * | 1983-07-04 | 1986-08-26 | Cole Martin T | Smoke detection apparatus |
GB2189065A (en) * | 1986-04-08 | 1987-10-14 | William Jackson Fernihough | Fire alarm |
GB2272987A (en) * | 1992-10-15 | 1994-06-01 | John Alfred Worthington | Gas driven alarm |
GB2272987B (en) * | 1992-10-15 | 1996-10-23 | John Alfred Worthington | Alarm systems |
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