| 摘要 |
This invention operates is an adaptation to chart recorders and indicating instruments as a means to detect and store the pen or indicator positions. The method used to capture the information utilizes a sensing element mounted in, on or under the surface on which the pens record or indicators indicate. The pens are equipped to act as pointing devices detectable by the position sensing element. The pen positions are sensed and converted to a format which can be processed and interfaced to other devices.
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