A radio receiver receives a transmitted high-frequency signal which is mixed within the receiver with a local-oscillator-frequency signal to form an intermediate-frequency signal, which in turn is converted into an audio-frequency signal. A plurality of indicator elements are arranged in a row to form a quasi-analog channel indicator, each indicator element of which is associated with a respective one of the selectable channels. A multi-channel oscillator furnishes the requisite local-oscillator-frequency signals for tuning-in the available channels and furthermore controls the operation of the indicator elements of the quasi-analog channel indicator.
An endless impervious, oil, abrasion and crush resisting belt for paper making machinery such as presses, especially of the extended nip type, calender rolls, and the like has a woven fiber base, such as scrim, and a urethane coating impregnating the base providing an integral layer of substantial thickness with pores forming a granite like finish providing excellent paper release properties. The surface finish of the belt can be modified with subsequent grinding and coating treatments and can be grooved if desired. The belt is formed by looping an endless scrim blanket around driving rollers providing a travelling run which is sprayed with a two component polyurethane coating which quickly gels to accommodate building up of a layer of the desired thickness by controlling the fluid flow and the speed of the travelling run.
A receiver having a tuner for tuning to a desired broadcast station and connected with a detector through which a demodulated signal is supplied as an input signal to a function selector which receives at least one other input signal from another source thereof and which selects either the demodulated signal or the other input signal as the output signal therefrom, a tuning control for selecting the broadcast frequency to which the tuner is adjusted and a volume control for adjusting the volume of the output signal from the function selector; is provided with a common display device, desirably constituted by a row of bar-type display elements, which selectively displays either the broadcast frequency, when the function selector selects the demodulated input signal, or the volume level when the function selector selects the other input signal or when the volume control effects a change in the volume level.
A shielding apparatus for use with a non-conductive package has an insulated lid (102) which is retained in contact with a substrate (104) for holding an electrical circuit. The shielding apparatus includes a first conductive flash (201) deposited on the interior surface of the insulated lid (102), to produce a substantially contiguous conduction layer, and a second conductive flash (203) deposited over a film (110) disposed on the edge of the insulated lid (102), to produce a partially contiguous conduction layer. The shielding apparatus also includes a layer (108) for affixing the insulated lid (102) to the substrate (104), to produce an enclosure for isolating the electrical circuit from extraneous radio frequency (RF) energy.
