GB594373A - Improvements in and relating to low power magnifying apparatus - Google Patents
Improvements in and relating to low power magnifying apparatusInfo
- Publication number
- GB594373A GB594373A GB1488745A GB1488745A GB594373A GB 594373 A GB594373 A GB 594373A GB 1488745 A GB1488745 A GB 1488745A GB 1488745 A GB1488745 A GB 1488745A GB 594373 A GB594373 A GB 594373A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- stage
- focusing
- support
- mount
- 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
- 238000005286 illumination Methods 0.000 abstract 3
- 230000036633 rest Effects 0.000 abstract 2
- 239000004744 fabric Substances 0.000 abstract 1
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)
- Lenses (AREA)
Abstract
594,373. Magnifying - apparatus. HARRISON, G. A. June 12, 1945, No. 14887. [Class 97 (i)] The apparatus comprises a lens mount movable relatively to a support for focusing on an object carried by the support on a stage, which is provided with a mask to prevent direct illumination of the object by a light source positioned below it, the internal surfaces of said mount and support above the object being reflecting, preferably diffusely. As shown the support is a cylinder 1 mounted on a base 2 and apertured for access to a lamp 5, supported on the base and operated by a switch 6. The cylinder has mounted, in a bezel 3a at its upper end, a transparent stage 3, which has painted thereon or secured thereto opaque discs 3b, 3c preventing direct illumination of the object carried thereby, which is viewed through a lens 9, having a dome-shaped mount 8 terminating in a cylinder 7, which telescopes on to the cylinder 1 to facilitate focusing. A cloth 1b around the cylinder 1 stabilizes the focusing position frictionally. Focusing may alternatively be provided for by forming co-operating screw threads on the cylinders 1 and 7. In another embodiment, the mount 8 may be provided with rods slidable for focusing in tubes on the cylinder 1, one rod being displaceable in its tube by a rack-and-pinion or friction disc driving means. The lens mount may be fixed on the base and the support 1 moved for focusing. In each case, the stage 3 may be provided with a projecting lug to facilitate its removal or rotation, and the opaque discs may be replaced by a single disc, which has one black and one white surface and which rests loosely on the stage, or by a translucent sheet when direct illumination is required. Instead of the enclosed lamp 5, daylight or an external lamp may be used, the light from which is reflected on to the stage 3 by a mirror, which may be provided with a lamp socket on a slider so that one or the other may be used as desired. Part of the support may also be cut away to facilitate manipulation of the object on the stage and hand rests may be provided.
Publications (1)
Publication Number | Publication Date |
---|---|
GB594373A true GB594373A (en) | 1947-11-10 |
Family
ID=1731096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1488745A Expired GB594373A (en) | 1945-06-12 | Improvements in and relating to low power magnifying apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB594373A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2106504A1 (en) * | 1970-09-14 | 1972-05-05 | Onanian Richard | |
US4003151A (en) * | 1975-10-03 | 1977-01-18 | Dynatech Laboratories, Incorporated | Test plate reader |
-
1945
- 1945-06-12 GB GB1488745A patent/GB594373A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2106504A1 (en) * | 1970-09-14 | 1972-05-05 | Onanian Richard | |
US4003151A (en) * | 1975-10-03 | 1977-01-18 | Dynatech Laboratories, Incorporated | Test plate reader |
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