GB568391A - Improvements in or relating to optical magnifying appliances - Google Patents

Improvements in or relating to optical magnifying appliances

Info

Publication number
GB568391A
GB568391A GB545943A GB545943A GB568391A GB 568391 A GB568391 A GB 568391A GB 545943 A GB545943 A GB 545943A GB 545943 A GB545943 A GB 545943A GB 568391 A GB568391 A GB 568391A
Authority
GB
United Kingdom
Prior art keywords
cowl
reflector
lens
lamp
form shown
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
GB545943A
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.)
GORDON INSTR Co Ltd
JAMES GORDON HALL
Original Assignee
GORDON INSTR Co Ltd
JAMES GORDON HALL
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 GORDON INSTR Co Ltd, JAMES GORDON HALL filed Critical GORDON INSTR Co Ltd
Priority to GB545943A priority Critical patent/GB568391A/en
Publication of GB568391A publication Critical patent/GB568391A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/02—Eyepieces; Magnifying glasses with means for illuminating object viewed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

568,391. Viewing apparatus. BALL, J. G., and GORDON INSTRUMENT CO., Ltd. April 6, 1943, Nos. 5459/43 and 2947/44. [Class 97 (i)] An optical viewing apparatus comprises an inverted-dish shaped cowl having one or both ends 6 formed as a reflector of parabolic section, means for carrying a lamp at about the focus of the (or each) reflector, a light-trapped ventilating opening 8 formed between overlapping edges of the end 6 and top 7 of the cowl, and one or more magnifying lenses 12, 13 associated with the cowl. In the form shown in Fig. 1 the cowl is pivotally mounted on a pair of arms 19 carried by a spindle 21 pivotally supported in a head 22 on a stem 23 slidably and rotatably mounted in a base 17. The lens is slidably mounted in the cowl, and a baffle 16 is provided between it and the lamp. The form shown in Fig. 3 is intended for viewing translucent objects, and includes a translucent panel 26 in the cowl, which forms the base of the apparatus, and a lens 32 supported similarly to the cowl in Fig. 1.
GB545943A 1943-04-06 1943-04-06 Improvements in or relating to optical magnifying appliances Expired GB568391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB545943A GB568391A (en) 1943-04-06 1943-04-06 Improvements in or relating to optical magnifying appliances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB545943A GB568391A (en) 1943-04-06 1943-04-06 Improvements in or relating to optical magnifying appliances

Publications (1)

Publication Number Publication Date
GB568391A true GB568391A (en) 1945-04-03

Family

ID=9796580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB545943A Expired GB568391A (en) 1943-04-06 1943-04-06 Improvements in or relating to optical magnifying appliances

Country Status (1)

Country Link
GB (1) GB568391A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170259A (en) * 1963-02-21 1965-02-23 Burton L R Frye Microfilm viewer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170259A (en) * 1963-02-21 1965-02-23 Burton L R Frye Microfilm viewer

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