PROPOSAL FOR THE UNAMBIGUOUS DISPLAY OF A QUANTITY OVER A WIDE RANGE BY MEANS OF CONTRA-MOVING POINTER AND SCALE.
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
Pagination or Media Count:
A principle is described according to which a pointer and scale arrangement can have unambiguous readings because there is a unique pointer position for each reading, and at the same time the scale can cover a wide range of values without a sacrifice of sensitivity. Movement of both pointer and scale relative to the instrument case is proposed, and the design should be straightforward for a linearly moving tape scale. Difficulties arise for circular scales, since a compromise may be required on the orientation of calibration figures, and these are discussed and illustrated. It is noted that a display working on this principle could be valuable for aircraft flight instruments and many other applications, but these possibilities are not examined in detail, and engineering designs are not explored. Author
- Human Factors Engineering and Man Machine Systems