Boots – shoes – and leggings
Patent
1984-11-13
1987-08-04
Gruber, Felix D.
Boots, shoes, and leggings
356380, 364550, 382 28, G01B 1128, G06G 1546
Patent
active
046850740
ABSTRACT:
An instrument for use with a film containing a printed circuit layout. The instrument measures the area which is transparent to electromagnetic radiation of a characteristic wavelength so that the open area of the film and the average open area can be calculated and displayed. A source oriented in a direction perpendicular to the transport path emits radiation of the characteristic wavelength across a width of the film. A plurality of detecting devices responsive to the characteristic wavelength are arranged in a linear array in optical coordination with the source. Each detecting device detects radiation transmitted through an incremental area of the film and produces an output signal representative thereof. A detector circuit connected to receive the output signals repeatedly and sequentially provides digital area signals proportional to the amount of clear area within a respective incremental area of film. A microcomputer receives the area signals and computes the total clear area. A digital display provides a visual indication of the total clear area.
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Kahn Instruments Brochure, "Don't Estimate . . . Calculate!".
Hale Steven D.
May Joe T.
Electronic Instrumentation and Technology
Gruber Felix D.
Teska Kevin J.
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