A device enables to reproduce without flicker mixed signals from VT and/or BTX decoders during the reproduction of television signals (mixed operation). This is obtained by a video frequency scanning field compensation in the vertical direction effected by a video frequency additional connectable scanning amplifier which supplies a reduced inductivity additional scanning winding.

One or more dual-contact assemblies and a battery receptacle including such assemblies. A dual-contact assembly includes a positive contact, a negative contact, and an insulating connector disposed between and connecting each of the positive contact and the negative contact in an electrically insulating disposition relative to each other. A dual-contact assembly hereof can be resilient such that at least one of the positive contact, the negative contact and the insulating connector of the resili...

A method for eliminating airborne microorganisms in an air duct comprises placing a device containing at least one light emitting diode (LED) in the air duct so that the air flow passes through the beam emitted by the LED.

A method of eliminating cushion distortion when adjusting reproduction equipment comprising a picture plane, an objective plane, and an original plane. The cushion distortion results optionally from a glass plate being inserted in the path of the rays. The invention is based on the principle that the direction of light is the same irrespective of the direction in which the light moves. By employing this principle a cushion distorted picture can be reproduced as an undistorted picture if an addit...

A distortion eliminating circuit for eliminating a harmonic distortion from an input frequency modulated luminance signal comprises a comparator for producing a series of output pulses responsive to the input frequency modulated luminance signal by comparing the level of the frequency modulated luminance signal with a predetermined level, a filtering circuit for extracting a d.c. component from the series of output pulses by filtering out oscillating components from said output pulses, a detecti...

A method of deprotection which comprises reacting a compound having at least one of amino, hydroxyl, mercapto and carboxyl groups protected by a substituted or unsubstituted benzyloxycarbonyl group or by a substituted or unsubstituted benzyl group with zinc in a buffer, thereby splitting off the protective benzyloxycarbonyl or benzyl group.

This invention is an apparatus for preventing twisting, kinking, fouling and intertwining of lines attached to rotational devices. A weighted block and tackle arrangement is used for each line, in combination with a grooved takeup drum. A separate portion of the drum is used for the takeup of each line.

A noise eliminating circuit capable of detecting a frequency component largely contained in a pulsive noise from an input signal and cutting off a signal path upon detection of such a frequency component for eliminating the pulsive noise, which circuit is characterized by means for keeping the signal path cut off for the duration when the input signal exceeds a preset level.

A noise eliminating system is disclosed for use in a radio receiver including a detector. The system comprises a differentiation circuit for differentiating the signal fed thereto from the detector, a clipper circuit for limiting the amplitude of the signal applied thereto from the differentiation circuit below a clipping level, a clipping level control circuit responsive to the strength of the electric field received in the receiver for varying the clipping level at a rate multiple of the elect...

A noise eliminating circuit comprising means for generating a signal having a phase difference with respect to an input signal, means for simultaneously cutting off the input signal and the phase difference signal at the time when a noise is entering the circuit, means for retaining the levels of the respective signals that have developed immediately before said signals are cut off, and means for outputting a retained signal of one level by adding the same to a retained signal of the other level...