| http://www.w3.org/ns/prov#value | - axes parallel to said columns; a support carriage adapted to maintain in position said light source and said photoelectricv reading member, the carriage being provided with a thin member shaped in the form of a portion of a nut thread; and a driving mechanism including a screw whose thread pitch is equal to the spacing of the card columns, and which is disposed parallel to said card path and perp
|
