FLAT FACE TAPE SCALE INDICATOR

摘要

An indicator tape is supported by idler pulleys in a flat position in front of a flat viewing window and is attached to a rotatable drum actuated by an amplifying linkage connected to a condition responsive means such as a Bourdon tube or diaphragm means for sensing a condition. The tape may be either endless or may have its other end attached to a spring-loaded return drum. The linkage connection between the bellows and the drum includes a zero adjustment and a range adjustment. A light transmitting plastic block is positioned behind the tape at the viewing window and is provided with cavities in which are mounted lights to illuminate the block and tape.