WSI

FIXED MOUNTING ROTATING COUNTERS; LONGITUDINAL COUNTERS; REVERSING TAPE COUNTERS; INSTRUMENT COUNTING COUNTER MECHANISMS; TAPE AND ANGLE COUNTERS; ANGULAR POSITIONING DEVICES USED TO INDICATE AN ANGULAR POSITION OF A MOVABLE MEMBER OF AN ISTRUMENT; ALL FOR USE IN CONNECTION WITH INSTRUMENTS IN MISSILE TRACKING, AIRCRAFT NAVIGATION AND DEAD RECKONING SYSTEMS; AND MICROFILM VIEWERS AND APERTURE CARD VIEWERS