GB568391A - Improvements in or relating to optical magnifying appliances - Google Patents
Improvements in or relating to optical magnifying appliancesInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3170259A (en) * | 1963-02-21 | 1965-02-23 | Burton L R Frye | Microfilm viewer |
-
1943
- 1943-04-06 GB GB545943A patent/GB568391A/en not_active Expired
Cited By (1)
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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