Abstract: For use with a telecommunications network, circuit for, and method of, detecting telephone line status and a telephone instrument embodying the same. The circuit includes: (1) a high-impedance amplifier, couplable to the telecommunications network, for providing DC voltage representing a differential line voltage between tip and ring conductors of the telecommunications network and (2) a pulse-generation circuit, coupled to an output of the amplifier, for generating a signal having first and second states, the signal assuming the second state for a period of time inversely proportional to the differential line voltage between the tip and ring conductors.

Abstract: An adjustable filler means for molds and method thereof which comprises a molding flask adapted to adjustably receive and support a plurality of mold-contouring fingers arranged to be functionally held in spaced relation to a pattern within the flask, so as to be readily moved and adjusted to conform to any irregular contour of such pattern or core print disposed within the flask, and wherein a contour medium is provided between the fingers and the surface of the pattern to establish a contoured space between the fingers and pattern, whereby molding sand is provided therein to form the face of a mold or core.