
record number: | 61 |
instrument type: | telescopic alidade (topography angle plotter) with compass |
manufacturer: | MOM |
serial number: | 37462 |
model: | MA-5 /360 |
weight: | 3.72 kg |
dimensions (l/w/h): | 22/16/20 cm |
year of manufacture: | 1955 |
instrument set up: |
circular level (not attached)
horizontal circle (alidade) toric level levelling toric level vertical circle level plumb bob compass (division from -5° to 5°) |
The plane table with telescopic alidade (kipregel) was made in 1955, at a time when graphic detailed measurement was becoming a thing of the past. A special bracket is added for centring the plane table. When preparing the instrument for measurement, as many as four toric levels are used. The table is roughly levelled with a separate circular level placed directly on the table. Horizontal circle (alidade) toric level allows fine levelling and the vertical circle index is controlled with a vertical circle level. A levelling toric level is mounted on the telescope.
A compass with a division for orienting the plane table with respect to magnetic north is added to the kipregel. The instrument resembles a self-reducing tacheometer in some respects. It has a vertical circle, and in the telescope the special shape of the crosshairs, with the use of a suitable tacheometric staff, enables direct measurement of horizontal distances and height differences.
The instrument was purchased for teaching purposes, but was not used much and is in excellent condition.
vertical circle | ||
---|---|---|
diameter: | protected, 63 mm | |
type of division: | engraved division | |
limb implementation: | glass bracket | |
division: | sexagesimal | |
unit: | 1° | |
Reading | ||
number of reading points: | 1 | |
reading device: | scale microscope | |
number of units: | 12 | |
graduation unit: | 5' | |
Telescope | ||
diameter of objective: | 48 mm | |
magnification: | 24 x, 30 x | |
type: | telescope with internal focusing | |
cross hairs/reticule: | self-reducing – basic hair, distance hair, elevation hairs, constant 100 |