OPTICAL READOUT DEVICE TO PROVIDE VISUAL INFORMATION

摘要

An optical readout device for providing visual circumference and diameter readings of an object being measured by a linear tape. The tail end of the tape passes by a reader element in a digital device which is equipped electronically with the pi conversion factor to provide selective readings of diameter in English and metric units, as well as circumference readings. The device can be employed for external (outside) and internal (inside) measurements.

主权项

1. An optical device to provide visual reading from a linear, the device comprising:
an optical readout device having a visual indicator area, a reader element, and computation means to provide signals to said optical readout device in relation to signals from said reader element; a plate on which said optical digital device is mounted, the reader element on said optical digital device facing and spaced from said plate; an elongated tape having one end secured to said plate and a second end which extends from said plate, said second end having an upper surface and a lower surface, and having machine readable increments on at least said upper surface, whereby when said second end of said elongated tape is looped away from said plate and said digital device, and passed between said reader element and said second end of said plate, said optical digital device provides visual indication of the outputs from said reader element pursuant to the portion of said second end of said tape which underlies said reader element.