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2. Leviton - Wikipedia

   en.wikipedia.org/wiki/Leviton

   In 1916, Leviton moved its headquarters to Williamsburg, Brooklyn, [5] and in 1922 Leviton moved to Greenpoint, Brooklyn. [2] The company first began manufacturing wall outlets and switches in the 1920s. [3] In 1936, Leviton built a new manufacturing plant in Greenpoint that allowed the company to begin making pull chains. [3]

3. Leviton (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/Leviton_(disambiguation)

   Leviton is an American manufacturer of electrical wiring equipment. Leviton may also refer to Leviton (quasiparticle), a collective excitation of a single electron ...

4. List of telephone switches - Wikipedia

   en.wikipedia.org/wiki/List_of_telephone_switches

   EMS-1 (The ITEC Electronic Modular Switch is an electronic direct control switching system. The modules are combined to form a complete switch or any of the modules can be added to your present Step-by-Step Systems.) EMS-2 (The EMS-2 RURAL SWITCH is a stored program control analog switch designed to be cost-effective in small exchanges.

5. Mercury switch - Wikipedia

   en.wikipedia.org/wiki/Mercury_switch

   A Single-Pole, Single-Throw (SPST) mercury switch on millimetre graph paper, device length approximately 1.5 cm Another mercury switch design. A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit. There are several different basic ...

6. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   The 5-15R and 5-20R are by far the most common electrical receptacle in North America in buildings built since the mid-twentieth century. It is usually installed in a duplex configuration; two receptacles may share a common circuit or may each be wired separately, sometimes to a switch.

7. List of keyboard switches - Wikipedia

   en.wikipedia.org/wiki/List_of_keyboard_switches

   Switch name Cherry MX equivalent Switch Type Actuation force Tactile force Actuation point Total travel Product code Durability (actuations) Cherry: Cherry: Black [1] Cherry MX Black: Linear: 0.60 N: N/A: 2.0 mm: 4.0 mm: MX1A-11xx >100 million Cherry: Cherry: Red [2] Cherry MX Red: Linear: 0.45 N: N/A: 2.0 mm: 4.0 mm: MX1A-L1xx >100 million ...