GB353591A - Improvements in and relating to systems for indicating or repeating the movement of a member electrically - Google Patents
Improvements in and relating to systems for indicating or repeating the movement of a member electricallyInfo
- Publication number
- GB353591A GB353591A GB1569230A GB1569230A GB353591A GB 353591 A GB353591 A GB 353591A GB 1569230 A GB1569230 A GB 1569230A GB 1569230 A GB1569230 A GB 1569230A GB 353591 A GB353591 A GB 353591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shutter
- pointer
- illumination
- cell
- shutters
- 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
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Measuring Devices (AREA)
Abstract
353,591. Electric signalling systems. WARREN, T. R., Beechwood, Gaskell Road, Altrincham, Cheshire, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London. May 21, 1930, No. 15692. [Class 40 (i).] The movements of a member, e.g. an electricity meter, are indicated or repeated through the intermediary of a photo-electric cell, the illumination of which is controlled by a shutter operated by the member and a second shutter adapted to follow the movements of the primary shutter. As shown in Fig. 1, the master pointer 1 moving over a scale 11 carries a shutter 2 having a recess 3 in the vertical edge, and being adapted to co-operate with a pair of shutters 4, 4<1> mounted on the pointer 6 of a follower instrument and having recesses 5, 51 which together with the recess 3 control the illumination of the photo-electric cell 9 by the light source 8. Between the cell 9 and the shutters is located a lens system 10 and a shield 12 having a divergent aperture 13 which allows the width of the aperture between the shutters to remain constant over the whole range of movement whilst providing variable illumination according to the extent of movement. The photo-electric cell 9 is connected to the grid of an amplifying valve 17, Fig. 2, the anode 21 of which supplies repeating instruments 23 and the following instrument 7 which may be of the moving coil type. When the primary pointer 1 alters its position the intensity of illumination of the cell 9 is changed and the current in the follower instrument 7 is varied to cause the pointer 6 to follow the pointer 1 until the aperture between the shutters is adjusted to an extent such that the illumination of the cell is sufficient to maintain the follower shutter in its new position. The shield 12 may be dispensed with if desired and a single shutter 4 may be employed. Modified amplifying arrangements employing two stages, Figs. 3, 4 and 5 (not shown), may be employed. Moreover alternating-current amplification may be employed, the light source being interrupted at constant frequency, e.g. by the use of a neon lamp supplied with alternating current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1569230A GB353591A (en) | 1930-05-21 | 1930-05-21 | Improvements in and relating to systems for indicating or repeating the movement of a member electrically |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1569230A GB353591A (en) | 1930-05-21 | 1930-05-21 | Improvements in and relating to systems for indicating or repeating the movement of a member electrically |
Publications (1)
Publication Number | Publication Date |
---|---|
GB353591A true GB353591A (en) | 1931-07-30 |
Family
ID=10063725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1569230A Expired GB353591A (en) | 1930-05-21 | 1930-05-21 | Improvements in and relating to systems for indicating or repeating the movement of a member electrically |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB353591A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE763649C (en) * | 1933-04-22 | 1953-04-27 | Westinghouse Electric & Mfg Co | Amplifier device for transmitting the position of the measuring element of a measuring device with low adjusting force to a display or writing device |
US3030513A (en) * | 1956-11-30 | 1962-04-17 | Gen Electric Co Ltd | Electrical apparatus for providing an indication of the relating positions of relatively movable means |
-
1930
- 1930-05-21 GB GB1569230A patent/GB353591A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE763649C (en) * | 1933-04-22 | 1953-04-27 | Westinghouse Electric & Mfg Co | Amplifier device for transmitting the position of the measuring element of a measuring device with low adjusting force to a display or writing device |
US3030513A (en) * | 1956-11-30 | 1962-04-17 | Gen Electric Co Ltd | Electrical apparatus for providing an indication of the relating positions of relatively movable means |
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