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Most likely this is a partnership between Hugo Harttmann and Charles A. Saxe "Charles A. Saxe was born in Russia in 1825. He is listed in the Philadelphia directories from 1856 to 1898 as a mathematical instrument maker. He was the inventor of the Shifting Center, Patent No. 21982 - February 14, 1858. 'Be it known that I, Charles A. Saxe of the City of Philadelphia, State of Pennsylvania have invented a new and useful machine for moving the center of Axes of Surveying Instruments to wit: (Surveyor's Compasses, Transits, Theodolites and Solar Compasses) or to move the Plummet which is attached to the center of the axes to any of these named instruments exactly above the given point in the ground, without moving any of the three legs on which the whole instrument rests, also without unscrewing the screws, with which the instrument is enabled to assume a horizontal position.' Assigned to James W. Queen & Co. (James W. Queen and Samuel L. Fox) September 10, 1867 for $75.00; assigned to William and Lewis Gurley on the same date for $75.00. Charles F. Helffricht was a witness to the patent application. In 1871 he [Saxe] is listed as a partner in the firm of Brelefield & Co. (Francis Brelefield and Charles A. Saxe). In 1959 there was repaired in Philadelphia a transit which was engraved "Haitman and Saxe Philadelphia" [likely a misspelling of Harttmann]. The label on the transit box states that the firm was located at Eighth and Chestnut Streets. Saxe died September 1, 1898 and is buried in Westminster Cemetery at Bala-Cynwyd, Pennsylvania." Reference: Smart, Charles E. The Makers Of Surveying Instruments In America Since 1700 Troy, New York: Regal Art Press. 1962 | ||||
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