NL7217843A - - Google Patents
Info
- Publication number
- NL7217843A NL7217843A NL7217843A NL7217843A NL7217843A NL 7217843 A NL7217843 A NL 7217843A NL 7217843 A NL7217843 A NL 7217843A NL 7217843 A NL7217843 A NL 7217843A NL 7217843 A NL7217843 A NL 7217843A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
- H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
- H01J41/06—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of cold cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
- H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
- H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712165619 DE2165619C2 (en) | 1971-12-30 | Ionization fire alarms | |
| DE2230932A DE2230932C2 (en) | 1972-06-23 | 1972-06-23 | Ionization fire alarms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7217843A true NL7217843A (en) | 1973-07-03 |
Family
ID=25762258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7217843A NL7217843A (en) | 1971-12-30 | 1972-12-29 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS4879998A (en) |
| AT (1) | AT332762B (en) |
| BE (1) | BE793205A (en) |
| CH (1) | CH558059A (en) |
| ES (1) | ES410210A1 (en) |
| FR (1) | FR2166005B3 (en) |
| GB (1) | GB1407639A (en) |
| IT (1) | IT976193B (en) |
| NL (1) | NL7217843A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH551057A (en) * | 1973-04-17 | 1974-06-28 | Cerberus Ag | IONIZATION ALARM. |
| AT378431B (en) * | 1983-06-30 | 1985-08-12 | Siemens Ag Oesterreich | SAMPLE CHAMBER OF CONVENTIONAL SIZE FOR INSTALLATION OF AN IONIZATION SMOKE DETECTOR INSERT |
-
0
- BE BE793205D patent/BE793205A/en unknown
-
1972
- 1972-12-13 FR FR7246101A patent/FR2166005B3/fr not_active Expired
- 1972-12-14 CH CH1820772A patent/CH558059A/en not_active IP Right Cessation
- 1972-12-21 AT AT1095272A patent/AT332762B/en not_active IP Right Cessation
- 1972-12-22 IT IT7106572A patent/IT976193B/en active
- 1972-12-29 JP JP407773A patent/JPS4879998A/ja active Pending
- 1972-12-29 GB GB6002172A patent/GB1407639A/en not_active Expired
- 1972-12-29 ES ES410210A patent/ES410210A1/en not_active Expired
- 1972-12-29 NL NL7217843A patent/NL7217843A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| GB1407639A (en) | 1975-09-24 |
| CH558059A (en) | 1975-01-15 |
| AT332762B (en) | 1976-10-11 |
| BE793205A (en) | 1973-04-16 |
| ATA1095272A (en) | 1976-01-15 |
| ES410210A1 (en) | 1975-12-01 |
| JPS4879998A (en) | 1973-10-26 |
| FR2166005B3 (en) | 1976-02-13 |
| FR2166005A1 (en) | 1973-08-10 |
| IT976193B (en) | 1974-08-20 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |