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Sonorex ultrasonic cleaner from the 1970s or 1980s Ultrasonic cleaning of a mobile phone. Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US ...
Extend the blind and open the slats before submerging the blind into the tub. Keep the top rail draped over the side of the tub and only place one blind into the water at a time. Soak for up to 20 ...
The company was founded in 1946 by Norman G. Branson, a research engineer for General Electric.He remained president and CEO of the company until 1967. In 1984, Branson Ultrasonics was purchased by Emerson Electric.
A lineage that began in 1874 with the Pennsylvania Working Home for Blind Men is today the largest non-profit organization in southeastern Pennsylvania serving the blind and visually impaired. ASB has primarily been a human services agency, but up until 2020, it had also operated as a braille production facility for decades, printing books ...
The physical principles of acoustic waves apply to any frequency range, including ultrasound. Ultrasonic devices operate with frequencies from 20 kHz up to several gigahertz. Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine.
On October 1, 1893, the Industrial Home for Blind Men was founded by Eben Porter Morford; [3] he became the superintendent. By 1894 seventeen blind men lived in the home. In 1952, IHB established a braille and large print textbook library for children. Also in 1952, George Hellinger opened the first Low Vision Eye Service within a blindness agency.