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Pat G Hedgcoxe, Charles D Zinsmeyer: Robotic pipe crawling device. Gas Research Institute, Neal J Mosely, September 5, 1989: US04862808 (67 worldwide citation)

A robotic pipe crawling device comprises two three-wheel modules pivotally connected at their centers, each having one idler wheel and two driven wheels. Each module comprises an idler yoke and a driveline yoke chassis with parallel laterally spaced rectangular side plates, the idler side plates bei ...


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Charles D Zinsmeyer, James A Parnell, Dan R Poole, Carl D Massey: Ribbon cassette for a printer. Summagraphics Corporation, Rosen Dainow & Jacobs, January 24, 1995: US05383733 (20 worldwide citation)

A cassette for ribbon for a printer, particularly a thermal printer, is disclosed. The cassette is configured to be stably mounted to a print carriage of a thermal printer, or to a storage turret mounted to the printer for storing a number of cassettes, and to be transferred by a passive transfer sy ...


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James A Parnell, John C Venthem, Charles D Zinsmeyer: Ribbon cassette storage and transfer apparatus for a printer. Summagraphics Corporation, Rosen Dainow & Jacobs, December 7, 1993: US05267802 (18 worldwide citation)

Apparatus is disclosed for use with printers (or plotters) for storing and transferring ink-containing ribbon cassettes between a print head and a storage location. The printers (or plotters) are of the type which include a print head that is not as wide as the width of the medium to be printed on s ...


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Charles D Zinsmeyer, Marlan L Schmidt, Gregory L Spaulding: Single degree of freedom belt drive tensioning system for a plotter apparatus. Summagraphics Corporation, Rosen Dainow & Jacobs, January 18, 1994: US05280309 (6 worldwide citation)

A belt-drive tensioning system for a motor drive positioning system, especially for X-Y digital plotters. The tensioning system employs spring-loading involving motion along only one translational direction to accurately preset and maintain constant the desired belt tension. Preferred embodiments to ...


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Marvin L Freeman, Charles D Zinsmeyer: Method and apparatus for gauging reel diameters in a reel-to-reel sheet material transport system. Summagraphics Corporation, Rosen Dainow & Jacobs, December 7, 1993: US05267401 (4 worldwide citation)

Method and apparatus are disclosed for determining the diameter of sheet material wound on a reel, and for setting the tension on sheet material as it is wound on the reel. According to one embodiment, the diameter of a take-up reel including sheet material wound thereon is determined from the angle ...


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Charles D Zinsmeyer: Rotating platform for observation, photography, and/or hunting. Waterloo Outdoor Products, Hulsey P C, Loren T Smith, William N Hulsey III, May 7, 2013: US08434594 (1 worldwide citation)

A highly stable rotating platform with a base, a roller deck assembly on top of the base, and a shooting deck coupled to the roller deck via leg assemblies. The leg assemblies contain two vertical members with an angled cross member between the vertical members providing strength and stability. Bi-d ...


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