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2. Wig wag (washing machines) - Wikipedia

   en.wikipedia.org/wiki/Wig_wag_(washing_machines)

   A vertical-axis washing machine has two mechanisms: a central agitator for washing and a drum for spinning, both driven by the same motor and controlled independently by clutches to the belt drive. The wig-wag is mounted atop the washing machine's transmission, where it oscillates back and forth like a railroad signaling wigwag (hence the name ...

3. Mangle (machine) - Wikipedia

   en.wikipedia.org/wiki/Mangle_(machine)

   Gradually, the electric washing machine's spin cycle rendered this use of a mangle obsolete, and with it the need to wring out water from clothes mechanically. Box mangles were large and primarily intended for pressing laundry smooth; they were used by wealthy households, large commercial laundries, and self-employed "mangle women".

4. Clothes dryer - Wikipedia

   en.wikipedia.org/wiki/Clothes_dryer

   An American style clothes dryer with a rear control panel A European style clothes dryer with a front control panel. A clothes dryer (tumble dryer, drying machine, or simply dryer) is a powered household appliance that is used to remove moisture from a load of clothing, bedding and other textiles, usually after they are washed in the washing machine.

5. Washing machine - Wikipedia

   en.wikipedia.org/wiki/Washing_machine

   There are also combo washer dryer machines that combine washing cycles and a full drying cycle in the same drum, eliminating the need to transfer wet clothes from a washer to a dryer machine. In principle, these machines are convenient for overnight cleaning (the combined cycle is considerably longer), but the effective capacity for cleaning ...

6. Samsung Electronics - Wikipedia

   en.wikipedia.org/wiki/Samsung_Electronics

   In 1973, Samsung and Sanyo created Samsung-Sanyo Parts, the predecessor of Samsung Electro-Mechanics. By 1981, Samsung Electric had manufactured over 10 million black-and-white televisions . In 1974, Samsung Group expanded into the semiconductor business by acquiring Korea Semiconductor, which was on the verge of bankruptcy while building one ...

7. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   For example, the switch contacts may operate in a vacuum, immersed in mineral oil, or in sulfur hexafluoride. In AC power service, the current periodically passes through zero; this effect makes it harder to sustain an arc on opening. Manufacturers may rate switches with lower voltage or current rating when used in DC circuits.