NL6410909A - - Google Patents
Info
- Publication number
- NL6410909A NL6410909A NL6410909A NL6410909A NL6410909A NL 6410909 A NL6410909 A NL 6410909A NL 6410909 A NL6410909 A NL 6410909A NL 6410909 A NL6410909 A NL 6410909A NL 6410909 A NL6410909 A NL 6410909A
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US309761A US3252156A (en) | 1963-09-18 | 1963-09-18 | Alarm annunciator including detection of breaks, grounds, and a break followed by a ground on a monitored line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6410909A true NL6410909A (en) | 1965-03-19 |
Family
ID=23199581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6410909A NL6410909A (en) | 1963-09-18 | 1964-09-18 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3252156A (en) |
| GB (1) | GB1019407A (en) |
| NL (1) | NL6410909A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1123607A (en) * | 1965-12-28 | 1968-08-14 | American District Telegraph Co | Electrical protection system |
| US3641547A (en) * | 1970-05-25 | 1972-02-08 | Alarmtronics Eng Inc | Line security system |
| US3689906A (en) * | 1970-09-02 | 1972-09-05 | Marvin J Levy | Monitoring and alarm system |
| US3786501A (en) * | 1971-07-14 | 1974-01-15 | C Marnerakis | Current monitoring system and method |
| US3846793A (en) * | 1973-04-30 | 1974-11-05 | Avco Corp | Open circuit and ground detector for fire and burglar alarm system |
| US4032916A (en) * | 1975-05-27 | 1977-06-28 | American District Telegraph Company | Intrusion alarm cable supervision system |
| US4725818A (en) * | 1985-09-13 | 1988-02-16 | Simplex Time Recorder Co. | Walk through test system |
| CN105303741A (en) * | 2015-11-27 | 2016-02-03 | 何翔 | Human body induction alarm |
| CN115102292B (en) * | 2022-08-25 | 2022-12-27 | 国网山西省电力公司太原供电公司 | Cable external-damage-prevention monitoring method and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2814033A (en) * | 1955-12-30 | 1957-11-19 | American District Telegraph Co | Burglar alarm system with equal day and night current |
| US2983912A (en) * | 1959-06-18 | 1961-05-09 | American District Telegraph Co | Signalling circuit |
-
1963
- 1963-09-18 US US309761A patent/US3252156A/en not_active Expired - Lifetime
-
1964
- 1964-09-15 GB GB37707/64A patent/GB1019407A/en not_active Expired
- 1964-09-18 NL NL6410909A patent/NL6410909A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1019407A (en) | 1966-02-09 |
| US3252156A (en) | 1966-05-17 |