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Topic: Centrifugal switch

Related Topics

Electric switch

Electric motor

Traction motor

Startup winding

Shaded pole motor

Relay

Three phase

Squirrel cage rotor

Electromagnetic induction

Circuit breaker panel

Transformer

Circuit breaker

Capacitor

List of electronics topics

Alternating current

	Switch - Wikipedia, the free encyclopedia
		A switch is a device for changing the course (or flow) of a circuit.
		A biased switch is one containing a spring that returns the actuator to a certain position.
		Switches can be designed to respond to any type of mechanical stimulus: for example, vibration (the trembler switch), tilt, air pressure, fluid level (the float switch), the turning of a key (key switch), linear or rotary movement (the limit switch or microswitch), or presence of a magnetic field (the reed switch).
	en.wikipedia.org /wiki/Switch (2183 words)

	Centrifugal switch - Wikipedia, the free encyclopedia
		A centrifugal switch is an electric switch that operates using the centrifugal force created from a rotating shaft, most commonly that of an electric motor or gasoline engine.
		In this case, the centrifugal switch consists of weights mounted to the shaft of the motor and held near the shaft by spring force.
		There is a variation of the Centrifugal Switch which has a changeover contact to ensure that the auxiliary winding remains in the circuit through a running capacitor.
	en.wikipedia.org /wiki/Centrifugal_switch (285 words)

	Mounting for centrifugal switch and conveyor belt powered accessories - Patent 4258840
		Customarily, centrifugal switches are connected to the lower portion of the return belt of each conveyor to provide an indication of the operative condition of the particular belt in question.
		A further object of the present invention is to provide a mounting force for centrifugal switches and conveyor belt powered accessories which is easily adapted for use either on the suspension cord of a suspended conveyor belt or connectible to a frame member of a frame supported conveyor belt.
		A pivot tube 48 is mounted atop the centrifugal switch 46 and disposed in surrounding relation to the pivot pin 38.
	www.freepatentsonline.com /4258840.html (3349 words)

	Abnormal tire condition warning system - Patent 5285189
		Centrifugal switch 30 is series-connected with the batteries so that the current path is open between the battery pair 28 and the radio circuit 10 whenever the car is stationary or moving at a rate of speed below some predetermined level, such as five miles per hour.
		That is, the centrifugal switch is oriented such that its contacts remain open until the centrifugal force generated on housing 16 by a rotating wheel exceeds a predetermined threshold level, at which point the contacts close to complete the circuit allowing energizing of circuit 10 through control means 11.
		The centrifugal switch arrangement also provides a means to automatically disable the control circuit and radio transmitter whenever the unit is not in its normal pressurized environment, such as in shipping or upon discarding, thus conserving battery energy and eliminating a potential source of radio interference.
	www.freepatentsonline.com /5285189.html (3251 words)

	Switch Resource Page - will smith switch
		The advantage of this type of switch switch is that the liquid metal flows around particles relay switch of dirt and debris that might otherwise prevent the contacts of a conventional float switch switch from closing.
		Special circuits switch bodies interactive story wall switch plates called "debouncing circuits" are often used to process the voltage from a switch or relay before it is applied to the input of a sensitive circuit.
		If the switch voltage is fed directly to the input of a microprocessor, then the software switch will smith might become confused by the rapid sequence of high and low logic levels when it is expecting only a single, stable transition between "on" and "off".
	www.governpub.com /gt/Switch.html (2124 words)

	Limit Switches & Limit Switch Information (Site not responding. Last check: 2007-10-31)
		Centrifugal Limit switches: A centrifugal limit switch is actuated by speed only.
		As the rotating sensing unit reaches switching speed, the centrifugal force of the calibrated weights overcomes spring force, resulting in an instantaneous axial displacement of the spring and the contact-actuating spool.
		The contacts switch at one speed as speed increases from zero to operating speed, and at a lower speed as rotation slows from operating speed toward zero.
	www.switches.machinedesign.com /guiEdits/Content/bdeee4/bdeee4_17.aspx (422 words)

	Switch - Engineering (Site not responding. Last check: 2007-10-31)
		If the switch or relay has changeover (also called double-throw or SPDT) contacts, then a debouncing circuit can be made by adding an SR flip-flop.
		The output of the flip-flop is a clean pulse that goes high when the switch is pushed away from its rest position, and then low when the switch is released, with no bounce.
		If the switch voltage is fed directly to the input of a microprocessor, then the software might become confused by the rapid sequence of high and low logic levels when it is expecting only a single, stable transition between "on" and "off".
	engineering.wikia.com /wiki/Switch (2090 words)

	[No title] (Site not responding. Last check: 2007-10-31)
		] A clutch operated by centrifugal force from the speed of rotation of a shaft, as when heavy expanding friction shoes act on the internal surface of a rim clutch, or a flyball-type mechanism is used to activate clutching surfaces on cones and disks.
		An outward pseudo-force, in a reference frame that is rotating with respect to an inertial reference frame, which is equal and opposite to the centripetal force that must act on a particle stationary in the rotating frame.
		] An instrument which permits magnification and observation of living cells being centrifuged; image of the material magnified by the objective which rotates near the periphery of the centrifuge head is brought to the axis of rotation where it is observed in a stationary ocular.
	www.accessscience.com /Dictionary/C/C15/DictC15.html (2466 words)

	AC Motors
		The centrifugal switch is located inside the motor on one of the end bells.
		The action of the centrifugal switch is as follows: the contacts on the stationary part of the switch (the stationary part is mounted on the end bell) are closed when the motor is not in motion and make contact with the starting winding.
		When the motor is energized and reaches approximately 75 percent of full load speed, the rotating part of the switch (mounted on the rotor) is forced by centrifugal force against the stationary arm, thereby breaking the contact and disconnecting the starting winding from the circuit.
	www.tpub.com /ceb/107.htm (1445 words)

	Centrifugal Pumps Monoblocks - Centrifugal pump, centrifugal water pumps (Site not responding. Last check: 2007-10-31)
		Our centrifugal pumps are of low cost and are applicable for pressure boosting and high head requirements.
		The centrifugal water pumps are applicable for water supply to commercial establishments like hotels, lodging and hospitals.The centrifugal pump is applicable for garden irrigation.
		The centrifugal pump is also applicable for water supply to flats.
	www.kiwipumps.com /centrifugalmonoblockspumps.htm (176 words)

	Torq Corporation - Switches for Single Phase Electric Motors
		TORQ switches are ideally suited for applications where detection of speed is essential for performance and protection.
		TORQ Syncrosnap® Centrifugal switches are used in single-phase electric motors ranging in size from small fractional HP to large integral HP models for both 50 and 60 hertz applications.
		The centrifugal switch is used to control the start-winding in split-phase induction motors.
	www.torq.com (147 words)

	Hübner GmbH: Centrifugal switch (Site not responding. Last check: 2007-10-31)
		The feature of the HUEBNER combinations is their Centrifugal switch common shaft, which avoids a spring-mass-system which is unfavourable for closed-loop control.
		Depending on the application, the tachogenerator with its own Centrifugal switch bearings can be combined with the incremental encoder to form one single unit, e.g.
		POG 9 G, which combine two independent analogue or digital systems into one single unit, electrically separate circuits for controlling or safety systems (redundancy) can be achieved Their features are extended by speed switches which execute a switch action at a defined speed either mechanically (centrifugal force) or electronically (with self-generated or external power supply).
	www.hubner-sensors.com /centrifugal-switch.html (985 words)

	[No title]
		On re-installation of front panel make sure the wires are not rubbing on the drum (there should be clips at the top of the front panel and at the top of the side panel holding the harness away from the drum).
		The Start switch powers both windings through the motor switch, until the centrifugal switch activates to switch to a different wire that powers only the run winding.
		When the motor centrifugal switch is in run position and the start switch in normal (off) position the buzzer has a ground path through the motor winding.
	ourworld.compuserve.com /homepages/sketchley_keith_h/dryer.txt (1526 words)

	Motor starting switch - US Patent 6737599 (Site not responding. Last check: 2007-10-31)
		A switch for an electric motor which inhibits vibratory noise during operation of the motor.
		A control lever is engageable with the switch arm to actuate movement of the switch arm between positions engaging or disengaging the electrical terminal.
		A cantilevered spring urges movement of the lever toward a generally stationary position against the wall of the housing to inhibit vibration of the lever during operation of the motor.
	www.patentstorm.us /patents/6737599.html (121 words)

	MachineDesign.com: Switch Tips: Centrifugal switches (Site not responding. Last check: 2007-10-31)
		Centrifugal switches typically serve as a means of turning on or off circuit functions depending on motor speed.
		The basic operating principle of the switch is to use a speed-sensing mechanism that consists of a conical spring steel disc that has weights fastened to the outer edge of a circular base plate.
		To control switching points, the spring is precision made to a thickness tolerance of ±0.00025 in.
	www.machinedesign.com /ASP/strArticleID/57252/strSite/MDSite/viewSelectedArticle.asp (437 words)

	Motor Trouble-Shooting Chart
		Centrifugal cutout switches will open or disconnect the starting winding when the rotor has reached a pre-determined speed, and reconnect it when the motor speed falls below it.
		The windings are unlike and thereby "split" the single phase of the power supply by causing a phase displacement between the currents of the two windings, producing a rotating field.
		Special starting switches are available as well as special reversing switches which have a means for shunting the open contacts of the automatic switch while the motor is running and thus permits the split phase motor to be reversed while rotating.
	www.bcelectrician.com /Motor_Trouble.htm (1743 words)

	Mobile Home Furnace Troubleshooting (Site not responding. Last check: 2007-10-31)
		The centrifugal switch senses whether or not the combustion/induced draft blower is running.
		Probably the only way you'll know whether or not you have a problem with the centrifugal switch is because the ignition control (circuit panel) is flashing you a code telling you that the switch is either stuck open or stuck close.
		Names for these switches, which vary from furnace to furnace, are called fan control, limit switch, upper limit switch or lower limit switch.
	www.mobilehomerepair.com /articlefurnace.htm (3255 words)

	Single Phase Motors
		If the problem is in the centrifugal switch, thermal switch, or capacitor, the motor is usually serviced and repaired.
		The starting winding is automatically removed by a centrifugal switch as the motor accelerates.
		Visually inspect the centrifugal switch for signs of burning or broken springs.
	www.capetronics.com /troubleshoot_single_phase_motors.htm (876 words)

	Multiple speed induction motor (US4467257)
		An AC induction motor has a two-pole run winding connected directly to power, a four-pole run winding connected to power by a "Triac" switch, and a separate start winding connected to power by a "Triac" switch and a centrifugal start switch.
		The centrifugal switch is connected between a common node to the start "Triac" and either one or the other of the power terminals.
		In different embodiments, the centrifugal switch is connected between the start circuit terminal and either the power terminal of the four-pole winding or of the two-pole winding.
	www.delphion.com /details?pn10=US04467257 (178 words)

	RCA CHAPTER 3-15 (Site not responding. Last check: 2007-10-31)
		On starting, the centrifugal switch is closed, and both windings function to produce a rotating field which acts upon the squirrel-cage rotor to effect rotation.
		As the motor comes up to speed the fly-weights of the centrifugal device on the motor shaft travel radially away from the shaft, and in so doing strike a metal pin which operates the switch to disconnect the starting winding.
		As the weights are retracted, they strike another metal pin, which closes the switch that connects the starting winding and resistor in parallel with the running winding, to be ready for another start.
	www.widescreenmuseum.com /sound/rca03-15.htm (463 words)

	[No title]
		The centrifugal switch was a mechanism used to switch between these windings as a function of the motors rotational speed.
		This is a switch that slides, as opposed to a rotary switch.
		Emerson improved this with a centrifugal switch that would switch to the run windings once a speed was realized.
	www.fancollectors.org /info/defbody.htm (3634 words)

	Lathe - Switch/Wiring
		The barrel switch (railroad) switch is all that is needed to operate the motor, and is standard on most units.
		The reversing switches have some uses, but on a lathe with a threaded spindle there is always the possibility of unscrewing the chuck or faceplate if you run it in reverse.
		You have the wiring schematic for the drum switch which ought to be easy to follow, probe around with the meter to verify contacts behave as you understand the schematic.
	www.armurerieduroi.com /pages/lathe/lathe_switch.html (8168 words)

	intereststuff
		A centrifugal switch is used to disconnect the starting winding when the motor reaches approximately 75% of rated speed.
		The winding and centrifugal switch arrangement is very similar to that used in a split phase motor.
		When the motor approaches running speed, the starting switch opens and the motor continues to run in the normal induction motor mode.
	www.bcelectrician.com /interest.html (681 words)

	A-1Appliance.com :: View topic - GE Dryer won't start
		I tested the belt safety switch with the drum and belt removed (not broken) and it did not show continuity.
		Switch will show open (no continuity) with the belt off, we must trip or fool the switch closed to test it.
		When I tested for continuity at the belt switch (result was no continuity), I did the test without turning the start switch on the control panel.
	a-1appliance.com /forum/viewtopic.php?p=651&... (2134 words)

	Centrifugal Pumps: Basic Concepts of Operation, Maintenance, and Troubleshooting (Part- II)
		In Part I of the article, two basic requirements for trouble free operation and longer service life of centrifugal pumps are mentioned in brief.
		Meaning of the term ‘cavitation’ in the context of centrifugal pumps.
		The topics 5 to 6 shall be explored in next part of the article.
	www.cheresources.com /centrifugalpumps1b.shtml (372 words)

	Broderick Projects - "Heavy Duty" Centrifugal Mechanical Overspeed Assemblies - Mechanical Drive Systems
		The Broderick Projects centrifugal overspeed switch is a speed responsive preset mechanical device which is factory set at the customer’s required overspeed trip setting, and in the event of an overspeed occurance a spring loaded plunger operates a stay put heavy duty micro switch which is connected into the safety circuit to stop the machine.
		The body of the enclosure is manufactured from aluminium alloy, in a modular construction to incorporate the overspeed device and transducer interface.
		An aluminium switch housing provides a lever operated stay put switch with two contacts (N/O N/C), a manual plunger is provided for resetting of the overspeed switch.
	www.broderickprojects.co.uk /products_overspeed.html (225 words)

	Franklin Electric Corporate Information
		While Franklin had made and utilized solid state switches on motors to a limited extent for several years, it was not until 1982 that a simple, reliable, low-cost solid state switch was perfected and produced.
		It had many advantages over the centrifugal switch, and was first used on swimming pool and spa motors, as well as airless paint sprayer and other severe duty motors.
		Tests on airless paint sprayer motors showed that the solid state switch performed flawlessly for over 15 million starts, whereas the conventional centrifugal switch usually wore out and failed in less than a million starts.
	www.franklin-electric.com /corp_text/80.htm (717 words)

	Reversing and Repair of Electric Motors (Site not responding. Last check: 2007-10-31)
		Note that the only difference in the internal wiring of the drum switch between 110v and 220v is a link between the terminals on the lower left.
		This same flow occurs in the wiring of the drum switch for 220v since both of the lines are hot (live), and Line 1 is directly connected to the motor without an intervening switch.
		The centrifugal switch normally is closed and passes current when the motor is stopped.
	www.metalwebnews.com /howto/elec-mtr/elec-mtr.html (3501 words)

	NADEP Cherry Point Employee Wins New Safety Award
		While working on P-3 APU centrifugal switches inducted from fleet units, Harper discovered a trend of incomplete switches inducted from the fleet.
		Original manufactured switches are a two-part assembly that requires calibration of the two parts together for the switch to function correctly.
		A number of the failed switches were being sent to Cherry Point without the barrel assemblies, indicating that the fleet units are only replacing the top switch section of the assembly and possibly discarding the new barrel assembly.
	www.safetycenter.navy.mil /articles/NADEPworker.htm (534 words)

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