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The Carter system, also known as the Chicago system, was a method of wiring three-way switches in the era of early knob-and-tube wiring. This now-obsolete wiring method has been prohibited by the USA National Electrical Code since 1923, [ 2 ] even in new knob-and-tube installations which are still permitted under certain circumstances.
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A somewhat similar system called "concentric wiring" was introduced in the United States around 1905. In this system, an insulated electrical wire was wrapped with copper tape which was then soldered, forming the grounded (return) conductor of the wiring system. The bare metal sheath, at earth potential, was considered safe to touch.
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The Financial Times described the sale as "cut price" because the French company Thales bid €300 million, but was blocked from purchasing Atlas on national security grounds. [1] Airbus Defence and Space announcement sale its remaining shares in Atlas Elektronik to ThyssenKrupp on 12 January 2017. The merge of ThyssenKrupp Marine Systems and ...
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Active guiding systems are composed of a sensor, an actuator connected to a guide mechanism, and a controller. [2] The sensor can be any detector, which can reliably pick up the edges of a web. The most common types of sensors are pneumatic (only works with nonporous webs), optical (works well with opaque webs), ultrasonic (works with most ...