Company of Winona, Minnesota, with its six HOPTO® hydraulic excavator models which complimented the Gradall models. The Company acquired in 1967, the Sargent Engineering Corporation of Fort Dodge, Iowa, a manufacturer of hydraulic cranes. Their six SARGENT HYDRA-TOWER® CRANE models enabled the company to move into another large segment of the construction industry using hydraulic machinery. That same year the Company partnered with a Canadian paper industry association in the manufacture of the ARBOMATIK® a line of hydraulic tree harvesting equipment. Through corporate diversity into hydraulic construction equipment, the growing popularity and productivity of this type of hydraulic machinery yielded strong business growth for the Warner & Swasey company of Cleveland, Ohio during the years of 1946 through 1977. See also James Hartness, president of competitor Jones & Lamson Machine Company, a contemporary of Worcester Reed Warner and Ambrose Swasey who shared their avocations of developing better telescopes and better turret lathes. References Bibliography Grant, James H. (2012), LOAD HANDLER Gradall LOED Materials Handler, New Philadelphia, Ohio, USA: JHG Partners, LLC, . Further reading External links 26-inch USNO Refracting Telescope The Beautiful Early Telescopes of Warner & Swasey, Including the J.A. Brashear and C.S. Hastings Optical Collaboration, abstract of lecture by John W. Briggs, Yerkes Observatory, at the 112th annual meeting of the Astronomical Society of the Pacific, Pasadena, CA, July 15, 2000 International Catalog of Sources: Warner & Swasey Company records to 1919 1900-1985 The story of Warner & Swasey telescopes by Ernest N. Jennison Smith Observatory History Warner & Swasey Company at Abandoned Companies established in 1880 Instrument-making corporations Machine tool builders Defunct technology companies of the United States Telescope manufacturers Manufacturing companies based in Cleveland 1880 establishments in Ohio Bendix Corporation