DE156297C - - Google Patents
Info
- Publication number
- DE156297C DE156297C DENDAT156297D DE156297DA DE156297C DE 156297 C DE156297 C DE 156297C DE NDAT156297 D DENDAT156297 D DE NDAT156297D DE 156297D A DE156297D A DE 156297DA DE 156297 C DE156297 C DE 156297C
- Authority
- DE
- Germany
- Prior art keywords
- earth
- circuit
- counter
- current
- line
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 3
- 210000003813 thumb Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
- G08B25/045—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop with sensing devices and central station in a closed loop, e.g. McCullough loop
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE156297C true DE156297C (cs) |
Family
ID=422689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT156297D Active DE156297C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE156297C (cs) |
-
0
- DE DENDAT156297D patent/DE156297C/de active Active
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