BE521894A - - Google Patents
Info
- Publication number
- BE521894A BE521894A BE521894DA BE521894A BE 521894 A BE521894 A BE 521894A BE 521894D A BE521894D A BE 521894DA BE 521894 A BE521894 A BE 521894A
- Authority
- BE
- Belgium
- Prior art keywords
- signal
- circuit
- station
- signals
- telephone
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 2
- 230000011664 signaling Effects 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000020004 porter Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/20—Checking timed patrols, e.g. of watchman
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE521894A true BE521894A (https=) |
Family
ID=157334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE521894D BE521894A (https=) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE521894A (https=) |
-
0
- BE BE521894D patent/BE521894A/fr unknown
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