附录一\*
通用电气公司的记录一回放系统堪称工程
\* 有关通用电气公司的记录一回放系统，参见：Larry Peaslee，“Tape Controlled Machines，”Electrical Manufacturing, November 1953; Darren B. Schneider, “Programmed Machine Tools”(typescript ), October 25, 1957; “A Brief Look at Metalworking Program Control," November 16, 1960 (both courtesy of Darren Schneider); Schneider, correspondence, 1977; “Record-Playback Control," GE Publication GE A— 6092; John Dutcher, letter to William Stocker, American Machinist editor, “N/C Systems Questionnaire,” April 1957 (courtesy John Dutcher); “Giddings and Lewis Numericord System of Machine Tool Automation," Giddings and Lewis Publication, Bulletin NR-I (courtesy Harry AnKeney); Harry Ankeney and John Dutcher, “Record-Playback Control of a Hypro Skin Mill," October 26, 1954 (courtesy John Dutcher), Patents on GE Record-Playback: O. W. Livingston et al. , “Programming Control System," U.S. Patent No.2, 537, 770 (issued January 9: 1951), O. W. Livingston, “Record-Reproduced Programming Control System for Electric Motors," U. S. Patent No. 2, 755, 422 (issued July 17, 1956); Lowell Holmes, “Magnetic Tape Recording Device," U. S, Patent No. 2, 755, 160 (issued July 17, 1956); Lawrence Peaslee et al. , “Error Signal Developing Means for Position Programming Control System," U. S. Patent No. 2, 866, 145 (issued December 13, 1958); Lawrence R. Peaslee, “Programming Control System," U. S. Patent No. 2, 937, 365 (issued May 17, 1960); O. W. Livingston, “Position Control System," U. S Patent No. 3, 051, 880 (issued August 28, J962)。
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