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Topic: Step switches

Related Topics

Automatic telephone exchange

Crossbar

Telephone exchange

Strowger switch

DTMF

Almon Strowger

Telephone operator

PBX

Multiplexer

SS7

Channel service unit

Amateur radio

Glossary of telecommunication network terms

Nokia

Network Control Program

	U.S. Patent: 5043641 - Circuit for and method of controlling 4-phase brushless DC motors - August 27, 1991
		Two switches A.sup.+ and C.sup.+ connect the respective armature coil terminals A and C of a motor to the supply voltage.
		Switches A.sup.+, B.sup.-, C.sup.+ and D.sup.- are semiconductor power switches which may be either bipolar power transistors or MOS power transistors.
		Fourth step: switches C.sup.+ and B.sup.- are closed, and switches A.sup.+ and D.sup.- are open.
	www.everypatent.com /comp/pat5043641.html (1945 words)

	Telephone exchange - Wikipedia, the free encyclopedia
		Switches are used in both local central offices and in long distance centers.
		Switching, transmission and billing equipment may be slaved to very high accuracy 10 MHz standards which synchronize time events to very close intervals.
		The structure of a switch is an odd number of layers of smaller, simpler subswitches.
	en.wikipedia.org /wiki/Telephone_switch (5030 words)

	Self-configuring ATM network - Patent 6041057
		Switches select a different outbound tag value for each requested point-to-point virtual connection so that when an end-user message encoded with a particular tag value is subsequently presented for forwarding, the switch will be able to associate the message with a distinct virtual connection between a particular source and destination switch.
		Switches may be configured to initiate requests for next-best path virtual connections only if they are on the best path to a destination switch from the perspective of the source switch.
		On the source switch, a broadcast, multicast or unknown unicast end-user message to be forwarded to the switches belonging to the shared VLAN is resolved to a first set of forwarding ATM port identifiers and a first set of tag values retrieved from a memory means.
	www.freepatentsonline.com /6041057.html (9257 words)

	HJFP2
		PRECISION STEP ATTENUATORS FOR THE HJFP2 AND HVTP2 MICPRES:
		Step attenuators are a multi position switch, where the various "steps" on the switch are precisely calculated attenuation levels using discrete metal film resistors (i.e.
		Mouser sells 23 step switches (open frame type), they are around $35 each, the 22 resistors are all different values, and you will have to buy a minimum of 10 each.
	www.e-z.net /~hamptweb/STEPATTNS.htm (389 words)

	3 X 8 Step Sequential Controller
		The number of steps in your sequence and the outputs determined by each are defined by the eight columns (called "steps") marked 1 to 8.
		The sequence will run from step 1 to step 8 then loop back to step 1 unless one of these switches is in the RESET position, in which case the sequence will loop at the step before the RESET.
		The step is excluded from the sequence, and the sequence jumps directly from the previous step to the next.
	www.analoguesystems.co.uk /modules/rs200.htm (2501 words)

	Game device, game machine operation device and game system which employ a half-duplex serial communication system and ...
		In step SP25, host CPU 10 writes into write FIFO 19 the packet data for confirming the connection, that is, a command for requesting the ID number (hereafter called an ID request command) and a command for querying the communication mode (hereafter called a communication mode inquiry command).
		In step SP63, host CPU 10 selects the communication mode to handshake mode, writes into command register 12 that the communication mode is handshake mode, and sets in command register 12 the number of characters of the data to be transmitted.
		In step SP89, it is decided whether the number of characters of data received matches the number of characters set in command register 12, that is, whether data of the number of characters set in command register 12 has been processed and communication has terminated.
	www.freepatentsonline.com /6659860.html (7537 words)

	2006 Conference General Sessions
		The steps begin with cause and effect and move through scanning with a single switch or two switches.
		Step 4 focuses on children who do not yet understand the concept of step scanning.
		Stepping Stones one through three will be reviewed briefly to demonstrate the skills leading up to stepping stone four.
	www.csun.edu /cod/conf/2006/proceedings/2961.htm (466 words)

	Telephone World - Unofficial Technological History of North Pittsburgh Telephone Company Part 1
		Prior to the installation of the #1EAX in 1977, the Step by Step that served the Gibsonia ratecenter served as the tandem.
		I assume this was either the fact that the first digit was absorbed in the switch, or it used the Gibsonia Step by Step switch as a step tandem.
		This was served from the Gibsonia Step by Step switch.
	www.dmine.com /phworld/nptco/history.htm (1777 words)

	Privateline.com: Telecommunications Fundamentals, Chapter 4: Fundamentals of Switching
		With the introduction of electronic switches, a telephone number is no longer wired to a specific component of the switch.
		Once the train reached the furthermost switch house or hub, the passengers would be required to change trains and board a local train which would travel the distribution network to the end destination.
		The fundamental process is that telephone calls progress through switches in steps, each step being made in response to the dialing of a digit.
	www.privateline.com /manual/four.html (1241 words)

	uk_attenuator_1
		In my case I might want the first steps to be fine, a mid section with more coarse steps and the last three steps to have steps that are three times as steep.
		Such attenuator switch is based on the principle of voltage-divider: Eleven, Twelve (or twenty-four) resistors are connected in series, and the rotary switch positions between two resistors.
		I found an open shorting switch in the conrad catalog (it is not advertised to be shorting but is definately is a shorting switch) and this one is easily modified to be useful for our application.
	www.platenspeler.com /background/attenuator/uk_attenuator_1.html (4987 words)

	Accelerating-Intelligence News: Single Article View (Site not responding. Last check: 2007-10-14)
		UCLA researchers have moved an important step closer to building a computer from the bottom up: They have attached molecular switches on a grid as small as 50 nanometers.
		The team has developed a 16-bit memory circuit that uses molecular switches that "work pretty well" on traditional wiring, said James Heath, UCLA chemistry and biochemistry professor and co-scientific director of the California NanoSystems Institute.
		The next step is to place and connect the molecular switches on a lithographic grid.
	www.kurzweilai.net /news/news_single.html?id=600 (174 words)

	Simplex Megatron Load Bank
		Load steps are controlled by magnetic contactors which are manually energized by switches on the control panel.
		All load steps are controlled by magnetic contactors which are activated by panel switches, one switch for each resistive step and each inductive step.
		With standard load stepping, voltmeter and ammeter phase transfer switches are provided to measure phase-phase voltages and phase currents.
	www.simplexdirect.com /LoadBank/megatron.html (881 words)

	Telephone World - Step-By-Step Telephone Switching Systems
		The Step by Step switching system was invented in 1888 and patented in 1891 by Almon Strowger, an undertaker in Kansas City, MO USA.
		The addition of a line finder selector to reduce the number of switching selectors that were needed (one for every 10 or more subscribers, instead of one for each subscriber).
		This was considered to be a simpler and cheaper version of the Strowger Step by Step, and was commonly used in rural areas of the mid-western United States.
	www.dmine.com /phworld/switch/sxs.htm (609 words)

	Bremas Cam Operated Switches & Bremas controls
		Cam operated switches are designed for universal applications, and will easily replace any other make.
		These industrial cam switches are UL listed, CSA approved, with isolated positive acting double break silver contacts built to international standards.
		All switches can be environmentally protected up to NEMA type 4X (IP65) where required.
	www.electram.com /bremas_aci_motor_controls.htm (133 words)

	diyAudio Forums - Cheap source/step'd-attenuator switches:
		switch the in-line resistor value and keep the shunt fixed.
		In fact I prefer this scheme to the more common shunt arrangement where the shunt value is switched.
		By the way, re your original post, I have used these inexpensive rotary switches in the past (there are listed as "Midget rotary switch" in RS Component) and they worked pretty well.
	www.diyaudio.com /forums/showthread.php?postid=314373 (643 words)

	Salzer Cam Switches from Control Switches International (Site not responding. Last check: 2007-10-14)
		Salzer Rotary Cam Switches are freely programmable, hand-operated switchgear for main and auxiliary circuits with 1 to 36 contacts, more in a tandem configuration.
		The Salzer Rotary Cam Switches are offered with switching angles of 30°, 45°, 60° and 90°, so circuits up to 12 switching positions can easily be realized.
		Thanks to their practical oriented mounting forms (front mounting, base mounting and enclosed switches with insulated enclosure) and the extensive number of combinations possible with the operator modules in form and color, Salzer Rotary Cam Switches are extremely versatile to use.
	www.controlswitches.com /asp/SalzerCamSws.asp (128 words)

	STEP ON IT! Keyboard Control Pedals by Bilbo Innovations, Inc. -- ergonomic foot switches to lessen wrist stresses ...
		Keyboard Control Pedals by Bilbo Innovations, Inc. -- ergonomic foot switches to lessen wrist stresses associated with Carpal Tunnel Syndrome (CTS), or Repetitive Strain Injury (RSI), and for use by the handicapped and disabled.
		They may also help to avoid bent and twisted wrist positions, usually associated with Repetitive Strain Injury, and could have special advantages for the disabled and amputees.
		Various custom foot switches are available to OEM customers: cordless, made of stainless steel, teeter-totter, etc.
	www.bilbo.com (672 words)

	Electric Reel
		Step left to left side, close right to left, step left to left side
		Holding arms at your sides, swing them from the elbows to the left, right, left and right again in synchronisation with the foot patterns of the (Apple Jack) steps.
		On the last beat of the dance you can step the left foot forward bending knees and extend left arm forward, right arm back holding position for a dramatic finish!
	mysite.wanadoo-members.co.uk /FLstepsheetsAtoM/E/ElectricReel.html (434 words)

	Radionics Online Ireland
		Radionics: Kraus and Naimer Changeover Switches 2 and 4 Pole
		Description: Instrument Switches - Automation, Control Gear/Switchgear, Klockner-Moeller 'T' Range, Klockner-Moeller 'T' Range: Industrial cam-operated instrument selector switches suitable for switching voltage measuring between two phases or betwen phase and neutral and current measuring circuits via current transformers.
		The pre-wired construction (1 metre of 4×0·75mm2 harmonised Cenelec cable) allows for ease of installation where space is at a premium.
	www.radionics.ie /electronic-components-ie/indexb160.html (1730 words)

	Minute Man Electronics Automatic Step-Up/Down Voltage Regulated U.S. Cord
		The unique features on this unit is that it senses the input voltage and automatically switches to step up if
		Automatically switches to step up or step down
		When selected, the delayed features adds about 3 minutes output delay for use with refrigeration systems or other applications where a delay after power on would be needed.
	www.minute-man.com /acatalog/Automatic_with_2_Meters.html (754 words)

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