TAPE CALCULATOR

摘要

A tape calculator used for mathematical calculations and conversions having three tapes bearing preselected indicia. Each of the tapes is attached to a spring biased reel mounted in a case. The reels are arranged such that the tapes are withdrawn from the casing in three geometric planes, one above the other. A locking member is provided to maintain the tapes in preselected positions and a cleaning member on the casing reduces wear on the tapes and keeps the tape surface clean.