"Print Hammer Flight Time Transducer", G. F. Pennell et al., IBM Tech. Disc. Bull.; vol. 22, No. 8B, p. 3673; Jan. 1980. |
"Platen with Imbedded Transducers . . . ", W. T. Chen et al., IBM Tech. Disc. Bull.; vol. 24, No. 10, pp. 5084-5085; Mar. 1982. |
"Multi-Function Impact Detector for Impact Printers"; E. Hindermeyer; IBM Tech. Disc. Bull.; vol. 27, No. 6, p. 3345; Nov. 1984. |
"Instrumented Printer Platen with Feedback Control"; Anonymous; IBM Tech. Bull.; vol. 28, No. 4, pp. 1678-1680. |
"Piezoelectric Transducer for Determining the Impact Times of Print Hammers"; Anonymous; IBM Tech. Disc. Bull.; vol. 29, No. 3, p. 1152; Aug. 1986. |