GB560007A - Improvements in or relating to electric signalling systems - Google Patents
Improvements in or relating to electric signalling systemsInfo
- Publication number
- GB560007A GB560007A GB12842/42A GB1284242A GB560007A GB 560007 A GB560007 A GB 560007A GB 12842/42 A GB12842/42 A GB 12842/42A GB 1284242 A GB1284242 A GB 1284242A GB 560007 A GB560007 A GB 560007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- signalling systems
- electric signalling
- class
- earth connection
- 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
- 230000011664 signaling Effects 0.000 title abstract 2
- 238000004804 winding Methods 0.000 abstract 2
- 230000002452 interceptive effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Alarm Systems (AREA)
- Fire Alarms (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
560,007. Fire alarm systems. STANDARD TELEPHONES & CABLES, Ltd., and BATES, E. F. Sept. 11, 1942, No. 12842. Addition to 557,077. Drawings to Specification. [Class 40 (i)] The system described in the parent Specification is modified by the two sets of signalling contacts at each substation being in the closed loop with the earth connection between them. The " non-interfering succession " feature may be provided by the use of a magnet having two windings in the loop and a third winding in the earth connection, as shown in Fig. 2 of Specification 328,665, [Class 40 (i)].
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB254967X | 1942-04-30 | ||
GB110942X | 1942-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB560007A true GB560007A (en) | 1944-03-15 |
Family
ID=26248048
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5819/42A Expired GB557077A (en) | 1942-04-30 | 1942-04-30 | Improvements in or relating to electric signalling systems |
GB12842/42A Expired GB560007A (en) | 1942-04-30 | 1942-09-11 | Improvements in or relating to electric signalling systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5819/42A Expired GB557077A (en) | 1942-04-30 | 1942-04-30 | Improvements in or relating to electric signalling systems |
Country Status (5)
Country | Link |
---|---|
US (1) | US2367258A (en) |
BE (1) | BE468184A (en) |
CH (1) | CH254967A (en) |
FR (1) | FR932231A (en) |
GB (2) | GB557077A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE469337A (en) * | 1945-10-19 |
-
0
- BE BE468184D patent/BE468184A/xx unknown
-
1942
- 1942-04-30 GB GB5819/42A patent/GB557077A/en not_active Expired
- 1942-09-11 GB GB12842/42A patent/GB560007A/en not_active Expired
- 1942-12-11 US US468625A patent/US2367258A/en not_active Expired - Lifetime
-
1945
- 1945-07-24 CH CH254967D patent/CH254967A/en unknown
-
1946
- 1946-08-13 FR FR932231D patent/FR932231A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB557077A (en) | 1943-11-03 |
US2367258A (en) | 1945-01-16 |
FR932231A (en) | 1948-03-16 |
BE468184A (en) | |
CH254967A (en) | 1948-05-31 |
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