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A fan controller with LEDs indicating fan status and potentiometers and switches to control fan speeds. Another method, popular with PC hardware enthusiasts, is the manual fan speed controller. They can be mounted in an expansion slot or a 5.25" or 3.5" drive bay or come built into a computer's case. Using switches or knobs, attached fans can ...
The infinite switch itself was described in a 1975 patent of George F. Esker Jr. and Otto J. Cousins of the Harper Wyman Company. This switch would reset itself as the bi-metallic strip cooled, provided a cycle of calibrated opening and closing. It also provided an indicator light that remained on as long as the knob was not in the closed position.
The earliest stack-motor fan was the Emerson, which was an earlier version of the model that was later called "Heat-Fan", a utilitarian fan with a dropped metal flywheel and blades made of fiberglass and later moulded plastic depending on the model. This fan was produced in numerous different forms from 1962 through 2005 and, while targeted at ...
Michael Bell (born 1938), together with Melanie Chartoff (born 1950), U.S. – a gray water recycling device for reuse of shower and sink water in the home; Alexander Graham Bell (1847–1922), UK, Canada, and U.S. – telephone; Nikolay Benardos (1842–1905), Russian Empire – arc welding (specifically carbon arc welding, the first arc ...
A system in which signals and switches for a given area of track are controlled from a centralized location [65] Ches-C Chessie System's kitten logo; the profile of the Chesapeake and Ohio Railway's sleeping kitten mascot Chessie appears inside the corporate C logo [66] [67] Cinder dick Railroad police detective.
The dimmer switch used in conjunction with a dimmable CFL must be matched to its power consumption range; [58] many dimmers installed for use with incandescent bulbs do not function acceptably below 40 W, whereas CFL applications commonly draw power in the range 7–20 W. Dimmable CFLs have been marketed before suitable dimmers are available.
Reba Nell McEntire (/ ˈ r iː b ə ˈ m æ k ɪ n t aɪər / REE-bə-MAK-in-tire; born March 28, 1955), [1] [2] known simply as Reba, is an American country music singer and television, film and stage actress.
A shampoo label from the U.S. that shows a round metric quantity taking secondary status in parentheses next to non-integer U.S. customary quantity. Metrication is the process of introducing the International System of Units, also known as SI units or the metric system, to replace a jurisdiction's traditional measuring units.