Abstract: An integral meter and current transformer to measure single phase active and reactive energy, voltage and frequency in industrial, commercial and multi-family residential applications. The meter CT is the primary sensing element in a revenue metering system encompassing multiple meter CTs serially connected in groups in communication with data cores for collection and reporting of energy consumption. Numerous data cores may be networked to report to a central station which may be remotely interrogated over the network or dial up modem connection. The meter CT utilizes a split-core transformer with substantially overlapping fingers. Disengaging split-core sections of the meter CT enables it to be easily installed around a loaded conductor without the interruption of power to the load.

Abstract: A non-contact optical gauging device in which a laser beam is deflected to produce a bidirectional scan. The beam is split; a measuring portion scans an object being inspected while the other portion scans a calibration reticle having alternating opaque and transparent bands. The alternating transmission and ocultation of the beam through the reticle is used to generate calibration pulses, each representing a predetermined increment of movement of the calibration beam. Ocultation of the measuring beam by the object being measured generates a signal which is used to control counting of the calibration pulses as an indication of the dimension being measured. Bidirectional averaging is employed to minimize errors due to object motion in the direction of beam scanning. Variations are disclosed in which two measuring beams and one or two calibration beams, are employed for measuring large objects or for dual axis measurement, the latter by orthogonal projection onto the object being measured.