Sensor incorporating a circular spirit level, electrical lamp and two pairs of photocells, provides an electrical indication of flat surface level deviation.
Sensitive level sensor made with spirit level, gives electrical output
01.03.1965
Sonstige
Keine Angabe
Englisch
Plane-level gives electrical output.
NTRS | 1965
|Understanding the process that gives rise to household car ownership level changes
Online Contents | 2016
|Sensitive clinometer and level
Engineering Index Backfile | 1945
|