GB669632A - Improvements relating to radiation responsive apparatus - Google Patents
Improvements relating to radiation responsive apparatusInfo
- Publication number
- GB669632A GB669632A GB35352/47A GB3535247A GB669632A GB 669632 A GB669632 A GB 669632A GB 35352/47 A GB35352/47 A GB 35352/47A GB 3535247 A GB3535247 A GB 3535247A GB 669632 A GB669632 A GB 669632A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- counter
- mean
- improvements relating
- tube
- 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.)
- Expired
Links
- 230000005855 radiation Effects 0.000 title abstract 2
- 230000002285 radioactive effect Effects 0.000 abstract 2
- 239000012857 radioactive material Substances 0.000 abstract 1
- 229910052705 radium Inorganic materials 0.000 abstract 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Radiation (AREA)
Abstract
669,632. Discharge apparatus. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Dec. 31, 1947 [April 3, 1939], No. 35352/47. Class 39 (i). [Also in Group XL (b)] An apparatus responsive to radiations emitted from a radioactive source comprises a photosensitive counter tube I of the kind described in Specification 591,433, a relay 12 operable when the mean current through the tube rises to a predetermined value due to the increase in the rate of counter impulses, and an indicating device operated by the relay so as to indicate the presence of a radio active source. The apparatus may be used for prospecting for radioactive materials or for recovering lost radium needles in hospitals. A pentode 16 is used to amplify the counter impulses before application to the relay. The relay may be a thyratron. An ammeter 9 indicates the mean amplified current.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR669632X | 1939-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB669632A true GB669632A (en) | 1952-04-09 |
Family
ID=9015830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35352/47A Expired GB669632A (en) | 1939-04-03 | 1947-12-31 | Improvements relating to radiation responsive apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB669632A (en) |
-
1947
- 1947-12-31 GB GB35352/47A patent/GB669632A/en not_active Expired
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