Geometrical instruments – Distance measuring – Environmental isolation
Patent
1997-03-17
1999-06-22
Fulton, Christopher W.
Geometrical instruments
Distance measuring
Environmental isolation
33 1B, 33 1BB, 33623, G05D 2300, B42D 1500
Patent
active
059135859
ABSTRACT:
A measurement device such as a sheet dimension gauge and a method of constructing a gauge which does not require recalibration. The preferred embodiment includes a frame having a transparent top wall with overlaid measurement lines thereon, a measurement guide, a light source, a heater, a thermostat, and a fan. The frame and the transparent top wall are constructed of a material whose dimensions are not susceptible to changes in humidity, but are susceptible to changes in temperature. Therefore, a temperature control system is used during manufacture and operation of the gauge to ensure that the sheet dimension gauge is properly calibrated. A fan, a thermostat, and a heater are mounted within the frame to maintain a uniform temperature inside of the frame slightly above the highest anticipated ambient temperature created by the lights. A one piece measurement guide, which is used to hold the sheet of paper being measured, is rigidly attached to either the frame or the transparent wall. The measurement lines are overlaid onto the transparent wall in a properly calibrated position relative to the measurement guide. The measurement lines are mounted while the frame and the transparent wall are in the heated state in order to ensure the accuracy of the sheet dimension gauge. The gauge is also provided with a cover to protect the measurement lines.
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Quick Skan brochure, 8 pages, Apr. 1992.
Fulton Christopher W.
Intectron, Inc.
Litman Richard C.
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