Offset Pointers (Sight Parallel)
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A sighting element parallel to a stylus plotting points on a perpendicular board.
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Drawing Apparatus
D.K. Wade
1889
Perspective Drawing Apparatus
Andrew Morse
1874
Perspectograph or Offset Pointer (Sight Parallel)
Mario Bettini
1645
Perspectograph/Offset Pointer (Sight Parallel)
Vincenzo Scamozzi
1580
Surveying Instrument (Offset Pointer)
Baldassare Lanci
1557
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