GB440579A - Improvements in or relating to photometers - Google Patents

Improvements in or relating to photometers

Info

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
Application number
GB2928334A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HARRY HOLT JUNIOR
Oldham Crompton Batteries Ltd
Original Assignee
HARRY HOLT JUNIOR
Oldham Crompton Batteries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HARRY HOLT JUNIOR, Oldham Crompton Batteries Ltd filed Critical HARRY HOLT JUNIOR
Priority to GB2928334A priority Critical patent/GB440579A/en
Publication of GB440579A publication Critical patent/GB440579A/en
Expired legal-status Critical Current

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.
GB2928334A 1934-10-12 1934-10-12 Improvements in or relating to photometers Expired GB440579A (en)

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)

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