Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1975-02-21
1976-11-16
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
35 9A, 353 26A, 355 45, 355 52, G03B 2752, G09B 300, G09B 700
Patent
active
039920925
ABSTRACT:
A microfilm instruction system provides detailed service instructions for diagnosing and repairing complex electronic instrumentation. Troubleshooting procedures are recorded on microfilm along with a series of programmed instructions for directing the service repairman step-by-step to pinpoint the source of the problem and to make the necessary repair. Each frame of microfilm containing a sequence of question sets which appear upon the display plate of the microfilm viewing system further provides a corresponding series of response switches also located on the microfilm viewing system. Each of the questions relate to a possible condition for the malfunctioning electronic apparatus to be repaired and each series of questions requires an affirmative or negative response by means of the response switches. Each frame of microfilm also has a series of optically encoded information data which when electrically read, automatically directs the operator to the next relevant frame in the course of the diagnostic and repair sequence. The response switches in connection with a gated electronic circuit cooperate with the optically encoded information by means of a photoelectric matrix array to show the next frame in the series by means of a digital readout display. Operation of a start control switch causes a motor drive to automatically advance so that the repairman is now presented with a set of new questions in order to proceed with the diagnostic schedule. The repairman now answers the new set of data questions and pushes corresponding response switches in reply. While this invention primarily describes automatic motor driven advance to provide rapid access to new information, the use of a manual frame advance in response to the digital readout is not precluded. The aforementioned combination of photodetectors, gate circuits and microfilm optically encoded data then direct the repairman to further frames if further diagnosis is necessary. After a required number of frames have been presented and the reponse via the coded data and gate circuit combination indicate to the technician that repair, for example, includes a part replacement then the next frame to be presented will be the frame that includes the part number and the location of the part to be replaced in a storage area containing all the replacement parts for the particular apparatus involved. One microfilm viewing cassette of the aforementioned design therefore is able to provide diagnosis and repair for a large number of sophisticated electronic apparatus by means of an equivalent number of reels of microfilm frames.
REFERENCES:
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patent: 3810317 (1974-05-01), Rosenbaum et al.
Hill Alfred C.
International Telephone and Telegraph Corporation
O'Halloran John T.
Wintercorn Richard A.
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