GB986421A - Improvements in or relating to light-sensitive probes - Google Patents
Improvements in or relating to light-sensitive probesInfo
- Publication number
- GB986421A GB986421A GB1205261A GB1205261A GB986421A GB 986421 A GB986421 A GB 986421A GB 1205261 A GB1205261 A GB 1205261A GB 1205261 A GB1205261 A GB 1205261A GB 986421 A GB986421 A GB 986421A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flame
- filter
- increase
- temperature
- photo
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Radiation Pyrometers (AREA)
Abstract
986,421. Heat & flame sensing devices. M. CLAUSEN, [trading as DANFOSS VED, ING M. CLAUSEN]. April 4 1961 [March 31, 1960], No. 12052/61. Headings G1A. [Also in Division H1] A light-sensitive probe for a flame-detection system includes a thermally sensitive layer located between a photo-resistor and the flame for controlling the intensity of illumination incident on the detector. The arrangement is utilized to protect systems in which the increase in dark current due to a rise in temperature may erroneously give a flame present indication. As shown in Fig. 1, the casing of a photo-resistor 1 connected by wires 2 to a control circuit has an aperture 5 receiving light from a flame 3 via a filter 6 carried by a plate 7. The filter 6 is of a material such as Cu 2 Hg I 4 whose translucence is reduced by an increase in its temperature. The filter 6 may be replaced by, or combined with, a filter of which the spectral range is displaced from the most sensitive range of the detector with increase of temperature. In a modification, Fig. 2 (not shown), the photo-resistor is enclosed in a casing having its wall surfaces which are subjected to the incident light coated with a substance having decreasing translucence with increase in temperature.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED33007A DE1189734B (en) | 1960-03-31 | 1960-03-31 | Photoelectric sensor, especially for flame guard |
Publications (1)
Publication Number | Publication Date |
---|---|
GB986421A true GB986421A (en) | 1965-03-17 |
Family
ID=7041550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1205261A Expired GB986421A (en) | 1960-03-31 | 1961-04-04 | Improvements in or relating to light-sensitive probes |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1189734B (en) |
DK (1) | DK107049C (en) |
GB (1) | GB986421A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60501913A (en) * | 1983-07-25 | 1985-11-07 | クオンタム グル−プ インコ−ポレイテツド | Photoelectric control device |
EP0151611A4 (en) * | 1983-07-25 | 1986-12-08 | Quantum Group Inc | Photovoltaic control systems. |
US4906178A (en) * | 1983-07-25 | 1990-03-06 | Quantum Group, Inc. | Self-powered gas appliance |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH129624A (en) * | 1927-12-09 | 1929-01-02 | Hartmann & Braun Ag | Radiation pyrometer. |
US2418845A (en) * | 1944-03-15 | 1947-04-15 | Comb Control Corp | Optical safety device |
CH253676A (en) * | 1947-03-09 | 1948-03-31 | Oertli W Ag | Flame monitoring devices for firing systems, in particular for oil firing systems. |
FR996822A (en) * | 1949-08-24 | 1951-12-27 | Home security appliance | |
DE950817C (en) * | 1951-05-18 | 1956-10-18 | Robert Girerd | Arrangement for displaying and / or measuring the changes in a physical quantity |
DE961218C (en) * | 1955-03-18 | 1957-04-04 | Johann Jost Reeh | Measuring device for registering low temperature radiation |
US2911456A (en) * | 1955-11-23 | 1959-11-03 | Volochine Theodore | Pyrometer |
DE1805334U (en) * | 1959-06-23 | 1960-02-04 | Siemens Ag | RADIATION PYROMETERS WITH THERMOCOUPLES FOR TEMPERATURE MEASUREMENTS IN STOVE OVENS. |
-
1960
- 1960-03-31 DE DED33007A patent/DE1189734B/en active Pending
-
1961
- 1961-03-16 DK DK111361A patent/DK107049C/en active
- 1961-04-04 GB GB1205261A patent/GB986421A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DK107049C (en) | 1967-04-17 |
DE1189734B (en) | 1965-03-25 |
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