Location History:
- Indianapolis, IN (US) (1984 - 1987)
- Largo, FL (US) (1987)
Company Filing History:
Years Active: 1984-1987
Title: The Innovations of Abraham E. Rindal
Introduction
Abraham E. Rindal is a notable inventor based in Indianapolis, IN (US). He has made significant contributions to the field of audio and video technology, holding a total of 5 patents. His work has focused on improving sound reception and stereo demodulation, showcasing his expertise in electronic engineering.
Latest Patents
One of Rindal's latest patents is titled "Quasi-parallel television if suitable for stereo sound reception." This invention involves a multiplier that enhances the modulated sound and picture carriers to produce an intercarrier sound signal. It addresses the issue of phase shifts caused by the varying capacitance of diodes, which can lead to phase modulation interference in stereo sound reproduction. To mitigate this interference, Rindal's design incorporates a low-value resistor that inhibits capacitance variations, thereby improving sound quality.
Another significant patent is the "Phase selectable circuit for use in a stereo demodulator." This circuit features two signal paths, where the first path provides a signal with a selected magnitude and phase. The second path can either provide no signal or a signal with double the magnitude and opposite phase. By combining the signals from both paths, the circuit produces a signal with a selectable phase, which is particularly useful in stereo decoders.
Career Highlights
Rindal's career has been marked by his innovative contributions to RCA Inc., where he has worked on various projects that enhance audio and video technology. His patents reflect a deep understanding of electronic systems and a commitment to improving user experience in stereo sound reproduction.
Collaborations
Throughout his career, Rindal has collaborated with notable colleagues such as Patrick D. Griffis and William A. Lagoni. These partnerships have likely contributed to the development of his innovative ideas and patents.
Conclusion
Abraham E. Rindal's work in the field of audio and video technology has led to significant advancements, particularly in stereo sound reception and demodulation. His patents demonstrate a commitment to innovation and a deep understanding of electronic engineering principles. Rindal's contributions continue to influence the industry and enhance the quality of audio experiences.