A noise blanker circuit protects a signal processing circuit from unwanted noise spikes by interrupting the signal path when it exceeds a preestablished threshold or reference level. The detector itself is a two branch detector that has in one branch a variable gain amplifier that is controlled by an automatic gain control signal and a comparator. The other branch of the circuit has a delay network which delays the signal by the propagation delay of the variable gain amplifier in the comparator ...

A noise eliminator mounted from the exterior to a flat cable connecting an electric circuit to thereby bypass noise conducting through the flat cable. Feedthrough capacitors are provided at a substrate, feedthrough terminals to be inserted into the capacitors are held by an insulator, at the upper ends of the feedthrough terminals are provided sharp furcate insulation displacement connection portion, and a cover insulator jig for press-inserting the furcation of each insulation displacement conn...

A sound absorbent pad, which comprises an interconnected cellular foam or a fibrous material, has a central hole which houses a microphone whose sound-sensing diaphragm is held flush with the center of the outer surface of the pad. The pad is a shallow dome or other shape which converges from a large base to a vertex and incorporates a plastic or metal plate, which being frusto-conical or another suitable shape. The pad with its plate acts to control noise which would otherwise be reflected from...

A mouse comprises a cover and a displacement pad which is displaced upon movement of the mouse over a surface. Displacement transducer means, e.g., strain gauges mounted in a parallel arm linkage, are used to ascertain direction of motion. Noise created by sliding motion is monitored by a microphone, the output of which is a function of velocity and therefore distance. The microphone may be mounted to the displacement pad, and the pad and microphone covered with a friction and vibration enhancin...

A thermometer based upon the measurement of spontaneous thermal noise in the form of electrical fluctuations in a sensor resistance, in which the sensor is included within an input circuit. The input circuit is inductively coupled to a matched circuit tuned to a selected band width of the noise and which includes the measuring electronics which preferably discriminates between random amplifier noise and the sensor signal by correlation techniques.

Noise generation by machines having cam driven reciprocating elements is reduced in a machine wherein the cam-follower linkage comprises a double walled cam slot, a follower roller within the slot and spring means for moving the follower from the trailing wall to the leading wall of the cam slot.

The invention concerns a noise generator, more particularly for the conveon of a digital signal into a stochastic representation. It is characterized in that the noise generator, constituted by a decimal counter coded in binary code, makes the sequence: 5, 2, 7, 1, 8, 3, 6, 0, 9, 4 appear for each decade. This noise generator is applied in calculators and in digital-to-analog/analog-to-digital converters.

High temperature resisting cordage is wrapped around an exhaust gas muffler housing and covered with an outer wrap of metal to provide sound and thermal insulation for the muffler.

Disclosed is a noise barrier which comprises a hollow-cell type block having as its principal components a perforated sound-absorbing plate opposed to the noise source and a sound-insulating plate disposed opposite said sound-absorbing plate and incorporating therebetween a sound-absorbing material, a free spacing plate disposed behind said block across an intervening free air layer and means for absorbing and damping sound energy (a vibration-repressing coupling). There is also disclosed a nois...

A slug is disposed adjacent a rotor of an induction type motor. The slug is of a "ferrous" material such that the attraction between it and the magnetic poles of the rotor creates at least side and preferably both side and end loading of opposed ends of the rotor shaft within its supporting bearings. The slug, disposed stationarily in spaced relation to the rotor, is of a length approximately equal to the length of a chord through adjacent magnetic poles. The action of the slug is to reduce bear...