Boots – shoes – and leggings
Patent
1988-05-02
1990-11-27
Lall, Parshotam S.
Boots, shoes, and leggings
33 1L, 33707, G01B 702
Patent
active
049741640
ABSTRACT:
A hand-held microcomputer-based ruler-like measuring and calculating instrument, particularly adapted for but not restricted to the graphic arts field, is capable of registering individual size measurements, proportioning successive readings in percent, converting to different units and visually displaying numeric results. The measuring, computing and indicating system has been human-engineered to eliminate fatigue and risk of error associated with conventional methods of repeatedly sizing and proportioning graphics elements. Distance along a fixed ruler scale, gaged by a slider-mounted pointer, is sensed and encoded electro-optically from an internal fixed bar-scale, digitally decoded, registered, processed and displayed. Optional audible indication enables the sliding pointer to be reset manually to a memory-stored reference point without eye contact, simplifying multiple sequential readings and proportioning factor determinations and thus greatly reducing mental and visual effort. Other ancillary functions include the ability to measure and display distances directly in inches, centimeters, picas, or in other user-defined units, to readily convert between any of these units systems, to reference visually to scale marks as typically shown on maps, charts, diagrams and the like, to center an object within an arbitrary span, and to measure distances greater than the actual length of the instrument. Life of the on-board battery is prolonged by pulsing the sensor device light source at a variable sampling rate in an adaptive velocity-feedback loop, and by automatic cutback to a low-power standby mode when not in use. Upon "re-awakening" by a user, recalibration is performed automatically. In the preferred embodiment, the abovementioned functions are controlled by only three user push-buttons and a slider-actuated switch.
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Amstutz James L.
Lewis Gainer R.
Cosimano Edward R.
Lall Parshotam S.
McTaggart J. E.
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