GB475248A - Electrical alarm system suitable for boilers - Google Patents
Electrical alarm system suitable for boilersInfo
- Publication number
- GB475248A GB475248A GB918637A GB918637A GB475248A GB 475248 A GB475248 A GB 475248A GB 918637 A GB918637 A GB 918637A GB 918637 A GB918637 A GB 918637A GB 475248 A GB475248 A GB 475248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- energized
- circuit
- restored
- coil
- broken
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/426—Feed-water supply alarm devices using electric signals
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Emergency Alarm Devices (AREA)
Abstract
475,248. Indicating liquid levels. LAIDLAW, A. B. S. March 31, 1937, No. 9186. [Class 123 (i)] In a high and low water alarm for boilers, circuit-breakers H and L operating at predetermined levels are connected to a panel A, so that when the level is correct both contacts are made and a green light G is illuminated. When one of the contacts is broken, a relay S is de-energized, contact C is made, a red lamp R is illuminated, and a bell B energized, the circuit of the bell including a relay switch X, the coil Q of which is normally de-energized with the switch closed. On depression of a push-button D, the coil Q is energized, the switch arm X pulled over, and the bell circuit broken, the lamp R remaining in circuit. When the water level has been restored, circuits through H and L will be restored, contact C broken, coil Q de-energized and contact X restored so that the apparatus is re-set to operate as before if the water level exceeds either limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB918637A GB475248A (en) | 1937-03-31 | 1937-03-31 | Electrical alarm system suitable for boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB918637A GB475248A (en) | 1937-03-31 | 1937-03-31 | Electrical alarm system suitable for boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB475248A true GB475248A (en) | 1937-11-16 |
Family
ID=9867060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB918637A Expired GB475248A (en) | 1937-03-31 | 1937-03-31 | Electrical alarm system suitable for boilers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB475248A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2493548A (en) * | 1946-05-27 | 1950-01-03 | William E Proctor | Boiler level alarm system |
| GB2133154A (en) * | 1982-12-24 | 1984-07-18 | Tokyo Shibaura Electric Co | Air humidifying apparatus |
-
1937
- 1937-03-31 GB GB918637A patent/GB475248A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2493548A (en) * | 1946-05-27 | 1950-01-03 | William E Proctor | Boiler level alarm system |
| GB2133154A (en) * | 1982-12-24 | 1984-07-18 | Tokyo Shibaura Electric Co | Air humidifying apparatus |
| US4563313A (en) * | 1982-12-24 | 1986-01-07 | Tokyo Shibaura Denki Kabushiki Kaisha | Humidifier |
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