For the Rotary Machine Switching System telephone exchange, see rotary system.
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Three-deck rotary switch allows controlling three different circuit functions
A rotary switch is a switch operated by rotation. These are often chosen when more than 2 positions are needed, such as a three-speed fan or a CB radio with multiple frequencies of reception or "channels".
A rotary switch consists of a spindle or "rotor" that has a contact arm or "spoke" which projects from its surface like a cam. It has an array of terminals, arranged in a circle around the rotor, each of which serves as a contact for the "spoke" through which any one of a number of different electrical circuits can be connected to the rotor. The switch is layered to allow the use of multiple poles; each layer is equivalent to one pole. Alternatively the rotation can be limited to a fraction (half; third etc.) of a circle and then each layer can have multiple (two; three etc.) poles. Usually, such a switch has a detent mechanism so it "clicks" from one active position to another rather than stalls in an intermediate position. Thus a rotary switch provides greater pole and throw capabilities than simpler switches do.
Rotary switches were used as channel selectors on television receivers until the early 1970s, as range selectors on electrical metering equipment, as band selectors on multi-band radios, etc.
Modern rotary switches use a "star wheel" mechanism to provide the switching positions, such as at every 30, 45, 60, or 90 degrees. Nylon cams are then mounted behind this mechanism and spring-loaded electrical contacts slide around these cams. The cams are notched or cut where the contact should close to complete an electrical circuit.
Some rotary switches are user-configurable in relation to the number of positions. A special toothed washer that sits below the holding nut can be positioned so that the tooth is inserted into one of a number of slots in a way that limits the number of positions available for selection. For example, if only four positions are required on a twelve position switch, the washer can be positioned so that only four switching positions can be selected when in use.
A rotaryswitch is a switch operated by rotation. These are often chosen when more than 2 positions are needed, such as a three-speed fan or a CB radio...
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other on a grade while sharing the remainder of the single track. A rotaryswitch rotates about its long axis to present a track connection to a chosen...
electromechanical technology was paramount. A basic stepping switch is an electrically operated rotaryswitch with a single (typically input) terminal, and multiple...
The rotary machine switching system, or most commonly known as the rotary system, was a type of automatic telephone exchange manufactured and used primarily...
earliest known DIP switch patent, which discloses a rotary style DIP switch. US patent 4012608, filed in 1975 by Joseph Lockard, is a DIP switch with sliding...
another depends on the switch. The original peripheral switches (Rose, circa 1988) used a rotaryswitch while active electronic switches (Cybex, circa 1990)...
switching topology in solid-state electronics. The crossbar switch is one of the principal telephone exchange architectures, together with a rotary switch...
of porcelain in the surface-mounted version and operated as a rotaryswitch with a rotary mechanism. Later, more durable Bakelite and Ebonite was used...
Switch 3 closes, an off-load operation. Rotaryswitch turns, breaking one connection and supplying load current through diverter resistor A. Rotary switch...
Look up rotary in Wiktionary, the free dictionary. Rotary may refer to: Rotary motion Rotary dial, a rotating telephone dial Rotary engine (disambiguation)...
six position rotaryswitch which selects which of six capacitors also sets the VCO frequency range. SW8 (toggle or momentary) is the switch that selects...
conjunction with improvements in switching technology. Almon Brown Strowger was the first to file a patent for a rotary dial on December 21, 1891, which...
In automotive engineering, a manettino dial is a rotaryswitch part of some modern Ferrari cars first designed by Frank Stephenson, beginning with the...
stove's one or more "burners" (heating elements) may be controlled by a rotaryswitch with a finite number of positions (which may be marked out by numbers...
engaged by knife switches, and evolved into the rotary dial telephone. The central office switching equipment has a two-motion stepping switch. A contact arm...
man's switch" for cutting the ignition voltage to the spark plugs on such a power-plant, to give a degree of in-flight speed control for a rotary engine...
an inverted rotary converter. One way to envision what is happening in an AC-to-DC rotary converter is to imagine a rotary reversing switch that is being...
including the electric motor, the alternating-current alternator, and the rotary converter. Today, the simpler alternator dominates large scale power generation...
maple cap, a patented vibrato, customized tuning pegs, and custom rotary pickup switching with high quality electronics, the guitar represented influences...
Rotary Watches Ltd was established at La Chaux-de-Fonds, Switzerland by Moise Dreyfuss in 1895. By the 1920s family members Georges and Sylvain Dreyfuss...
The Monosoupape (French for single-valve), was a rotary engine design first introduced in 1913 by Gnome Engine Company (renamed Gnome et Rhône in 1915)...
into the vectorized form of its transpose Commutator (electric), a rotaryswitch on the shaft of an electric motor or generator Commutation (neurophysiology)...
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