| 摘要 |
A multipurpose drafting and measuring instrument having an upright marking device mounted on a base or main frame readily maneuverable over sheet material. Mounted on the instrument main frame are one or more signal generators each having a roller in frictional driving contact with the sheet material and with their axes normal to one another and to a respective peripheral edge of the instrument base. The signal generators are connected to respective digital display panels each having a manually settable scale changer. Any of a variety of marking devices can be substituted for one another. The instrument includes various readily attached accessories for utilizing the instrument as an Y, X digitizer, a protractor, a planimeter, and both as a linear and a circular scale graduator.
|
