Patent ID: 7267014
Filing Date: 2007-09-11
Classification: G01D,G01F,G01K

Abstract:
1. A meter register, comprising: a register body having a rotatable drive shaft coupled thereto; an energy passing member co-acting with the drive shaft such that as the shaft rotates the member rotates, the member having a first surface, an opposite second surface, a first portion having a predetermined percent transmission to wavelengths of the magnetic spectrum, and a second portion having a predetermined percent transmission to wavelengths of the magnetic spectrum, wherein the first predetermined percent transmission of the first portion is greater than the predetermined percent transmission of the second portion; a device to emit energy in a predetermined wavelength range of the electromagnetic spectrum along a path to impinge on the first surface of the member; and a pair of detectors mounted in spaced relationship to one another, wherein each of the pair of sensors generates a first signal when energy passing through the first portion of the energy passing member is incident thereon and each of the detectors generating a second signal when the energy emitted by the device is incident on the second portion of the energy passing member.