US3233100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determining presence of aerosols in gases
Assignee: Cerberus AG
•
Filing: 1962-12-20
•
Granted: 1966-02-01
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Lampart Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:36
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66; G08; G08B; G08B17/00; G08B17/10; G08B17/11; G08B17/113; H; H01; H01J; H01J41/00; H01J41/02; H01J41/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AUTOMATIC FIRE ALARM APPARATUS FOR DETERMINING THE PRESENCE OF INCENDIARY AEROSOLS IN A GAS COMPRISING MEANS INCLUDING TWO SPACED ELECTRODES FOR CREATING AN ELECTROSTATIC FIELD IN THE SPACE BETWEEN SAID ELECTRODES AND PROVIDING ACCESS INTO SAID SPACE FOR SAID GAS, GAS IONIZATION MEANS FOR CAUSING AN IONIC CURRENT BETWEEN SAID ELECTRODES INCLUDING AT LEAST ONE SOURCE OF RADIOACTIVE MATERIAL DISPOSED TO RADIATE CORPUSCULAR RADIATION FROM ONE OF SAID ELECTRODES INTO SAID SPACE IN A DIRECTION PARALLEL TO THE SAID ELECTROSTATIC FIELD AND HAVING THEREIN AN EFFECTIVE RADIUS OF RADIATION INFLUENCE LESS THAN ONE CENTIMETER. AND MEANS INCLUDING ALARM MEANS COUPLED TO SAID ELECTRODES FOR SENSING CHANGES IN SAID IONIC CURRENT DUE TO THE PRESENCE OF INCENDIARY AEROSOLS IN THE IONIZED GAS AND FOR EFFECTING AN ALARM IN RESPONSE TO SUCH CHANGES.
Claim 2
Dependent Claim
131 words
AUTOMATIC FIRE ALARM APPARATUS FOR DETERMINING THE PRESENCE OF INCENDIARY AEROSOLS IN A GAS COMPRISING MEANS INCLUDING TWO SPACED ELECTRODES FOR CREATING AN ELECTROSTATIC FIELD IN THE SPACE BETWEEN SAID ELECTRODES AND PROVIDING ACCESS INTO SAID SPACE FOR SAID GAS, GAS IONIZATION MEANS FOR CAUSING AN IONIC CURRENT BETWEEN SAID ELECTRODES INCLUDING AT LEAST ONE SOURCE OF RADIOACTIVE MATERIAL DISPOSED TO RADIATE CORPUSCULAR RADIATION FROM ONE OF SAID ELECTRODES INTO SAID SPACE IN A DIRECTION PARALLEL TO THE SAID ELECTROSTATIC FIELD AND HAVING THEREIN AN EFFECTIVE RADIUS OF RADIATION INFLUENCE LESS THAN ONE CENTIMETER. AND MEANS INCLUDING ALARM MEANS COUPLED TO SAID ELECTRODES FOR SENSING CHANGES IN SAID IONIC CURRENT DUE TO THE PRESENCE OF INCENDIARY AEROSOLS IN THE IONIZED GAS AND FOR EFFECTING AN ALARM IN RESPONSE TO SUCH CHANGES.
References Cited (Backward Citations)
US2972680A
Cited
US2994768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |