Importance

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Abstract

A digital operation recorder provided with a recording medium having a data region for recording operation data for each operation of a car, a clock, whose time is correctable, for generating time data, and a write means for successively writing the operation data into the data region within the recording medium at intervals of a preset time and writing, in response to the time data from the clock, such data from which its starting time and ending time can be found out is disclosed. In the recorder, the write means comprises a time write means for writing, every time the operation data of the car is successively written into the data area within the recording medium, the time elapsed after the start of each operation into a first area of the data region such that the currently written elapsed time supersedes the previously written time, and a time-of-day write means for writing, every time the operation data of the car is successively written into the data area within the recording medium, the time of write into a second area of the data region such that the currently written time of write supersedes the previously written time.

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First Claim