GB601961A - Improvements in or relating to the production of engine-divided scales - Google Patents
Improvements in or relating to the production of engine-divided scalesInfo
- Publication number
- GB601961A GB601961A GB1154744A GB1154744A GB601961A GB 601961 A GB601961 A GB 601961A GB 1154744 A GB1154744 A GB 1154744A GB 1154744 A GB1154744 A GB 1154744A GB 601961 A GB601961 A GB 601961A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- image
- ring
- prism
- knob
- 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
- 239000011521 glass Substances 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000007519 figuring Methods 0.000 abstract 1
- 239000003292 glue Substances 0.000 abstract 1
- 239000005337 ground glass Substances 0.000 abstract 1
- 230000003287 optical Effects 0.000 abstract 1
- 230000002441 reversible Effects 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 235000015096 spirit Nutrition 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
601,961. Dividing-engines for marking graduations. MEECH, F. B., and OPTICAL MEASURING TOOLS, Ltd. June 16, 1944, No. 11547. [Classes 97 (i), 97 (iii) and 98 (ii)] The individual graduations, or small groups of adjacent graduations, are produced successively on a photo-sensitive surface by projecting an illuminated image of a mark, or group of marks, on to the surface and shifting the image and surface relatively to one another by dividing-engine mechanism between the successive exposures. As shown in Fig. 1, the sensitized glass plate 18 is mounted by clips on a removable table top 17, which may be secured by bolts at 16 to a circular table 14. The latter is mounted by a roller bearing 15 on a cylindrical casing 12 secured to the base 10 and may be rotated about its axis X-X by a worm-wheel 19 and fine adjustment worm operated by the knob 20. A graduated annular glass ring 21 is secured to the bottom of the worm-wheel 19. Part of the silvered scale on the ring 21 is illuminated by a source 50, Fig. 2, prism 22, and objective 23, and an image thereof is formed by the objective 23, prism 24, and prism 25 in the plane of a graticule 26, having two hair lines extending parallel to the projected image of the graduation or the scale 21. The graticule 26 may be moved in a direction at right angles to the hair lines by a micrometer screw 27, Fig. 1, in order to introduce corrections for the known inaccuracies of the scale on the ring 21. The graticule and image of the graduation on ring 21 are projected together by eye-piece 28, prism 29, and' mirror 30 on to a ground glass screen 30a. In use the table 14 is rotated by the knob 20 until the screen 30a shows the desired graduation on ring 21 to be mid-way between the two hair lines. The projector 37, 38 for projecting a reduced image of a slit in the screen 44 on to the plate 18, is carried by a slider 34, which is mounted on a bridge 31 so as to slide along a diameter of the table 14. A knob 35 enables the slider to be adjusted to a desired radial position over the plate 18. The lower tube 38 may be adjusted axially by the knob 39 for focussing, a gauge 45 interposed between the plate 18 and the bottom of the tube 38 to indicate the correct position. A shutter in the lamp housing 37 is opened to effect each exposure. Before the plate 18 is exposed it may be soaked in distilled water for fifteen minutes and then in 90 per cent industrial methylated spirits for fifteen minutes. The plate is exposed after drying, and developed by a reversal process. Contact. prints may then be made on glass plates covered by a bichromated " process " glue containing colloidal silver chloride. After developing in warm water the print is further treated with a photographic developer to blacken the silver and then with an intensifier solution. The print is finally baked at 250‹ C. so that the coating becomes enamelled firmly on to the glass. The figuring of the scales may be effected by replacing the screen 44 by screens bearing the figures required. Alternatively the figures may be on a strip of kinema film fed automatically at the appropriate rate.
Publications (1)
Publication Number | Publication Date |
---|---|
GB601961A true GB601961A (en) | 1948-05-18 |
Family
ID=1709880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1154744A Expired GB601961A (en) | 1944-06-16 | Improvements in or relating to the production of engine-divided scales |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB601961A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1089557B (en) * | 1955-07-28 | 1960-09-22 | Zeiss Carl Fa | Process for the production of scales |
US3003239A (en) * | 1955-02-26 | 1961-10-10 | Erich Hoffmann | Method and apparatus for measuring lengths by means of sound waves |
DE1210577B (en) * | 1957-10-10 | 1966-02-10 | Nat Res Dev | Process for the photographic production of graduations |
-
1944
- 1944-06-16 GB GB1154744A patent/GB601961A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3003239A (en) * | 1955-02-26 | 1961-10-10 | Erich Hoffmann | Method and apparatus for measuring lengths by means of sound waves |
DE1089557B (en) * | 1955-07-28 | 1960-09-22 | Zeiss Carl Fa | Process for the production of scales |
DE1210577B (en) * | 1957-10-10 | 1966-02-10 | Nat Res Dev | Process for the photographic production of graduations |
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