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NKK SWITCHES Co., Ltd. (NKKスイッチズ株式会社, NKK Suitchizu Kabushiki-gaisha) (formerly N ihon K aiheiki K ogyo Co., Ltd.) is a designer and manufacturer of diversified industrial operational switches. The company offers illuminated, process sealed, miniature, specialty, surface mount and LCD programmable switches.
From around 1905 to 1910 various mercury switches were invented, but the "mercury in glass envelope" switch got its start with patent 1598874 (filed on January 19, 1922 by Louis Phelan), [1] which evolved into a more modern mercury switch with a straight tubular glass envelope via patent 2232626 (filed on October 7, 1937 by Harold Olson of Honeywell).
After the final seal is made, the switch cools and the internal pressure is less than one atmosphere. Reed switches sealed with a pressurized nitrogen atmosphere have a higher breakdown voltage and are useful for switching 220–240 VAC mains power. Reed switches with a vacuum inside the glass envelope can switch thousands of volts.
In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. [1][2] The most common type of switch is an electromechanical device consisting of one or more sets of movable electrical ...
The GE 44-ton switcher is a four-axle diesel-electric locomotive built by General Electric between 1940 and 1956. It was designed for industrial and light switching duties, often replacing steam locomotives that had previously been assigned these chores. This locomotive's specific 44- short ton weight was directly related to one of the ...
Krytron. KN2 "Krytron" switch tube, made by EG&G (about 25 mm tall) [1] The krytron is a cold-cathode gas-filled tube intended for use as a very high-speed switch, somewhat similar to the thyratron. It consists of a sealed glass tube with four electrodes. A small triggering pulse on the grid electrode switches the tube on, allowing a large ...
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