1
Paul A Schumann Jr, Alvin H Tong: Textile color analyzer calibration. International Business Machines Corporation, Douglas R McKechnie, June 14, 1977: US04029419 (61 worldwide citation)

A spectrophotometer is operative to measure or analyze the colors of materials such as textiles. A test sample is held by a holder and is illuminated by polychromatic light. Diffuse light reflected from the sample is collected and converted to variable monochromatic light and detected. The system is ...


2
Einar S Mathisen, Paul A Schumann Jr, Alvin H Tong: Spectrum analyzing system with photodiode array. International Business Machines Corporation, Douglas R McKechnie, June 19, 1979: US04158505 (36 worldwide citation)

A spectrum analyzing system measures or analyzes the colorimetric properties of a test sample at a preselected wavelength or range of wavelengths within the ultraviolet, visible, and near infrared regions. The system includes a spectrophotometer provided with a wideband light source, optical devices ...


3
Herbert M Demsky, Einar S Mathisen, Theodore R Owen, Alvin H Tong: Spectrophotometer for dual mode fluorescence analysis. International Business Machines Corporation, Douglas R McKechnie, December 21, 1976: US03999062 (22 worldwide citation)

A spectrophotometer includes a wide band radiant energy source and a detector for providing an output signal proportional to the intensity of the radiant energy received thereby. A light pipe system is divided into a reference path and a sample path. Such system coacts with a rotary assembly having ...


4
Herbert M Demsky, Einar S Mathisen, Paul A Schumann Jr, Alvin H Tong: Apparatus for textile color analysis. International Business Machines Corporation, D R McKechnie, July 5, 1977: US04033698 (20 worldwide citation)

In a textile color analyzer, a sample of textile is supported on the pad of an elevator mechanism that holds the sample against an instrument head. The head has an opaque housing provided with a chamber having an opening therein. A glass plate is mounted in the head and covers the opening and presse ...


5
Herbert M Demsky, Einar S Mathisen, Robert C Millevoy, Paul A Schumann Jr, Alvin H Tong: Apparatus for textile color analysis. International Business Machines Corporation, Douglas R McKechnie, December 28, 1976: US03999860 (16 worldwide citation)

In a textile color analyzer, a sample of textile is supported on the pad of an elevator mechanism that holds the sample against an instrument head. The head has an opaque housing provided with a chamber having an opening therein. A glass plate is mounted in the head and covers the opening and presse ...


6
Einar S Mathisen, Alvin H Tong: Spectrophotometer sample holder. International Business Machines Corporation, Douglas R McKechnie, October 19, 1976: US03986778 (15 worldwide citation)

A spectrophotometer system is especially adapted for analyzing the colors of textiles. A sample holder includes a base that clamps a textile sample on a supporting surface. Slidably mounted on the base is a slider that is movable between two positions. In one position, an opening exposes the area to ...