GB870253A - - Google Patents
Info
- Publication number
- GB870253A GB870253A GB870253DA GB870253A GB 870253 A GB870253 A GB 870253A GB 870253D A GB870253D A GB 870253DA GB 870253 A GB870253 A GB 870253A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- float
- july
- projector
- container
- 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
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
870,253. Levels. STURNICH, A. July 7, 1959 [July 9, 1958], No. 23319/59. Class 97(2) Apparatus for indicating a horizontal line on a wall or the like at a desired height comprises a vertically adjustable member 5 having an upper flat edge 5a which may be levelled using a liquid level, the edge 5a carrying an optical projector 8 which is rotatable about a vertical axis so that a luminous beam 0-0 produced thereby may sweep over a horizontal plane. The member 5 floats on liquid in an annular container 4 supported by a tube 3. In setting up the apparatus, the container 4 is set approximately to the required height by sliding tube 3 in the seat 1 of the tripod 2. The float 5 is then placed in position and, when level, clamped by movable stops 7<SP>1</SP> against fixed ones 7. Then the projector 8 is placed on the float 5 and rotated about its pivot 14, the tube 3 being slightly raised or lowered to effect the fine adjustment.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB870253A true GB870253A (en) | 1900-01-01 |
Family
ID=1752845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB870253D Expired GB870253A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB870253A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590063A1 (en) * | 1991-06-18 | 1994-04-06 | SWIERSKI, Thomas | Projected light plumb device |
-
0
- GB GB870253D patent/GB870253A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590063A1 (en) * | 1991-06-18 | 1994-04-06 | SWIERSKI, Thomas | Projected light plumb device |
| EP0590063A4 (en) * | 1991-06-18 | 1994-07-13 | Thomas Swierski | Projected light plumb device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB870253A (en) | ||
| Rayleigh | XLIII. On the tension of water surfaces, clean and contaminated, investigated by the method of ripples | |
| CN206058718U (en) | Optical element coaxial adjustment experimental provision | |
| US2096964A (en) | Testing apparatus | |
| GB523439A (en) | Improvements in television apparatus | |
| US2123510A (en) | Enlarging apparatus | |
| CN209727089U (en) | A kind of instrument of surveying and mapping for exempting from leveling | |
| US2110324A (en) | Focusing device for photographic enlargers | |
| Anthony Jr | Automatic Modules for Regulating the Speed of Filtration | |
| US2645089A (en) | Automatic gate | |
| Harkins et al. | APPARATUS FOR THE DETERMINATION OF THE SURFACE TENSION AT THE INTERFACE BETWEEN TWO LIQUIDS.(SURFACE TENSION II.) | |
| JPH02190813A (en) | Method and device for adjusting horizontality of sample container | |
| Lane | Description of a New Form of Mercurial Horizon, in which Vibrations are Speedily Extinguished | |
| JPH06249662A (en) | Target for measuring rail | |
| CN216410191U (en) | Supplementary levelling instrument of optical instrument | |
| CN208653463U (en) | A kind of laser gradient measuring instrument | |
| CN210600942U (en) | Barrier-free adjustable wall hanging frame | |
| CN209993212U (en) | Ultrasonic grating experimental instrument | |
| CN215831541U (en) | Remote horizontal aiming fine-tuning mechanism and horizontal aiming equipment | |
| CN208737093U (en) | The fixed device of the primary mirror for the autocollimator that loss prevention is easily adjusted | |
| US3371577A (en) | Autofocus enlarger | |
| US3316642A (en) | Highly damped, balanced mounting for a plotter stylus | |
| KR20040070821A (en) | Auto leveller and levelling method for semiconductor device | |
| CN110865466A (en) | Device and method for calibrating levelness of plane mirror | |
| CN115290116A (en) | Calibration device and calibration method for horizontal collimation line and vertical collimation line |