Abstract: An improved welding mask glass to prevent orange flare is provided by utilizing as the glass in the lens a narrow bandpass green glass sold under Model S-8008N from Schott Glass Technologies, Inc., of Duryea, Pennsylvania. The transmission characteristic of the glass is a sharp cutoff from a peak of 544 nanometers toward the infrared which rejects objectionable "orange flares.

Abstract: Magnetic recording of a data contiuum is effected by means of sequential impulses of recording current. The impulses occur at substantially regular intervals providing samples of the data continuum. The impulses are of very short time duration, in that each impulse extends for only a fraction of the time interval that is required for a point on the record medium to traverse the effective recording field of the record head. The time spacing between impulses is approximately equal to said time interval, thereby providing a magnetic recording continuum corresponding to said data continumm. Certain of said impulses are indicative of data transitions, and other of said impulses are sustaining impulses occurring between data transition impulses. The sustaining impulses are of the same polarity sense as the respective immediately preceding transition impulse, but of lesser amplitude to obtain magnetic recording equalization over the recorded continuum between successive transition impulses.

Abstract: Magnetic recording of a data continuum is effected by means of sequential impulses of recording current. The impulses occur at regular intervals providing samples of the data continuum. The impulses are of very short time duration, in that each impulse extends for only a small fraction of the time interval that is required for a point on the record medium to traverse the effective recording field of the record head. The time spacing between impulses is approximately equal to said time interval, thereby providing a magnetic recording continuum corresponding to said data continuum.

Abstract: A magnetically recorded representation of an electrical binary waveform is transduced to an electrical signal wherein the binary waveform transitions are represented by peaks in the electrical signal. A delayed replica of the transduced signal is formed, and at least one of the transduced signal and replica signal is dynamically biased. These two signals are then compared to detect relative polarity reversals therebetween and to generate a binary waveform whose transitions correspond to said reversals and is therefore a replica of the magnetically recorded binary waveform.

Abstract: Magnetic recording of a data continuum is effected by means of sequential impulses of recording current. The impulses occur at regular intervals providing samples of the data continuum. The impulses are of very short time duration, in that each impulse extends for only a small fraction of the time interval that is required for a point on the record medium to traverse the effective recording field of the record head. The time spacing between impulses is approximately equal to said time interval, thereby providing a magnetic recording continuum corresponding to said data continuum.