Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1993-10-05
1994-09-27
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
With testing or indicating
250306, 369126, H01J 3700
Patent
active
053497350
ABSTRACT:
An information detection apparatus is disclosed. A plurality of probes are arranged in the apparatus so as to face a medium which carries an information, Each of the plurality of probes produces a detection signal from the medium. A performance testing device is provided in the apparatus for testing the performance of each of the plurality of probes. A detection device in the apparatus selects the signal from at least one normal probe on the basis of the test result of the testing device and detects the information in accordance with the selected signal. By such the construction in the apparatus, the detection of the information can be continuously effected even if one of the probes is broken.
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patent: 4945515 (1990-07-01), Ooumi et al.
patent: 4987303 (1991-01-01), Takase et al.
patent: 5047633 (1991-09-01), Finlan et al.
Kawase Toshimitsu
Kuroda Ryo
Miyazaki Toshihiko
Nose Hiroyasu
Yamano Akihiko
Canon Kabushiki Kaisha
Gorski Joseph M.
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