GB440579A - Improvements in or relating to photometers - Google Patents
Improvements in or relating to photometersInfo
- Publication number
- GB440579A GB440579A GB2928334A GB2928334A GB440579A GB 440579 A GB440579 A GB 440579A GB 2928334 A GB2928334 A GB 2928334A GB 2928334 A GB2928334 A GB 2928334A GB 440579 A GB440579 A GB 440579A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cabinet
- lamp
- cell
- screw
- ammeter
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
440,579. Photometric apparatus. OLDHAM & SON, Ltd., and HOLT, H., 36, Hyde Road, Denton, near Manchester. Oct. 12, 1934, No. 29283. [Class 97 (i)] A photometer comprises an electron discharge photo-electric cell mounted within a cabinet and connected to an externally read micro-ammeter &c., means being provided within the cabinet for locating the lamp to be tested at a predetermined distance from the cell. The locating means are so arranged that lamps of various sizes can be located at such predetermined distance which would be constant for similar type sources of light to be tested. The lamp is mounted within the cabinet 1 on two blocks 6 having facing V-shaped recesses and movable towards or away from each other in guides 7 by the screw 9 operated by a knob 10 outside the cabinet. The cell 3 is mounted on a block 22 vertically adjustable on rods 20, the position in which it is at the same level as the lamp bulb being determined by the pointer 21 attached to the block 22. The lamp may be placed at three or more predetermined distances from the cell by pulling out the screw 9 and engaging the detent 14 with one or other of three longitudinal grooves 11 in the screw shaft. The photocurrent is read on the micro-ammeter 19.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2928334A GB440579A (en) | 1934-10-12 | 1934-10-12 | Improvements in or relating to photometers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2928334A GB440579A (en) | 1934-10-12 | 1934-10-12 | Improvements in or relating to photometers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB440579A true GB440579A (en) | 1936-01-02 |
Family
ID=10289072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2928334A Expired GB440579A (en) | 1934-10-12 | 1934-10-12 | Improvements in or relating to photometers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB440579A (en) |
-
1934
- 1934-10-12 GB GB2928334A patent/GB440579A/en not_active Expired
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