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The toggle light switch was invented in 1916 by William J. Newton. [2] As a component of an electrical wiring or home wiring system, the installation of light switches is regulated by some authority concerned with safety and standards. In different countries the standard dimensions of the wall mounting hardware (boxes, plates, etc.) may differ.
[[Category:United States Marine Corps navigational boxes]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:United States Marine Corps navigational boxes]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
DIP switches are still used in some remote controls to prevent interference; for example, to control a ceiling fan (and its light fixture) that was retrofitted to a single-circuit junction box. The DIP switches set a different radio frequency or address for each transmitter / receiver pair, so that multiple units can be installed without ...
The Strowger switch has three banks of contacts. Toward the upper end of each shaft are two ratchets. The upper one has ten grooves, and raises the shaft. The lower one has long vertical teeth (on the other side, hidden). The Strowger switch uses two telegraph-type keys on a telephone set for dialing. Each key requires a separate wire to the ...
On engines without rocker arms, such as some overhead cam and most dual overhead cam types, [1] they are known as rocker boxes in the United Kingdom. On modern engines without rocker arms they are internationally known as "valve cover" but are sometimes referred to as a "cam cover" or "timing cover" if they also cover the timing gear(s) and ...