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Topic: Cursor (slide rules)

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	Cursor - Wikipedia, the free encyclopedia
		A cursor is a moving marker or pointer that indicates a position.
		Cursor was also the name of an early computer-based "magazine" that was distributed on cassette in the late 1970s.
		Cursor was produced for users of the Commodore PET.
	en.wikipedia.org /wiki/Cursor (180 words)

	Slide rule - Wikipedia, the free encyclopedia
		The slide rule (often nicknamed a "slipstick") is a mechanical analog computer, consisting of at least two finely divided scales (rules), most often a fixed outer pair and a movable inner one, with a sliding window called the cursor.
		Despite their similar appearance, a slide rule serves a purpose different from that of a standard ruler: a ruler measures physical distances and aids in drawing straight lines, while a slide rule performs mathematical operations by using distances on nonlinearly-divided scales.
		A slide rule tends to moderate the fallacy of "false precision" and significance.
	en.wikipedia.org /wiki/Slide_rule (4382 words)

	Learn more about Slide rule in the online encyclopedia. (Site not responding. Last check: 2007-10-11)
		The slide rule is a mechanical precursor of the pocket calculator.
		Some high-end slide rules had magnifying cursors that basically doubled the accuracy, permitting a 10 inch slide rule to serve as well as a 20 inch.
		Slide rules came into wide use in the 1850s, as engineering became a recognized professional activity.
	www.onlineencyclopedia.org /s/sl/slide_rule_1.html (1253 words)

	Slide Rules (OK)
		Slide rules became obsolete very rapidly in the early 1970s with the introduction of hand-held electronic calculators.
		Invented in the seventeenth century, an increasing variety of slide rules was developed during the eighteenth and nineteenth centuries.
		Large slide rules such as the one at the back of this case were produced for teaching the use of the instrument in class rooms.
	www.usyd.edu.au /su/macleay/cslipsticks.htm (1007 words)

	Slide Rule Dating
		On early rules the serial numbers were usually on the rule in two places, the end of the slide and the bottom edge of the frame.
		The slides and frame were cut from the same piece of stock and for best stability over the life of the rule they should be mated together in final assembly.
		Prior to 1924, mating of the rule parts was through the use of numbers stamped into the end of the rules on both the frame and the slide.
	www.mccoys-kecatalogs.com /Dating.htm (1646 words)

	Sphere Research's Slide Rule Universe - Cleaning slide rules
		It is unwise to attempt to clean a rule that is more than 50 years old, unless you are quite comfortable with the process, as the rule may be quite fragile, and the cursor in particular may be easily damaged by careless work.
		If it is a duplex rule like the 4081, you may not wish to remove the cursor, and you can slide a piece of white paper under the glass, and gently press on the glass, while moving the cursor along it.
		If it is a duplex rule like the Deci-lon or 4181, you may not wish to remove the cursor, and you can slide a piece of white paper under the glass, and gently press on the glass, while moving the cursor along it.
	www.sphere.bc.ca /test/clean.html (2557 words)

	Types of Slide Rules
		That is because the advantages of the circular slide rule applied to people new to slide rules and to slide rules with a limited number of scales, while the advantages of the straight slide rule were relevant to people who were trying to calculate rapidly and to slide rules with a large number of scales.
		Marks at the two ends of that sleeve constituted the cursor of the slide rule; thus, instead of placing the two helical scales in coincidence, points on the two scales separated by the distance between the two cursor marks were treated as corresponding.
		The first slide rule with a scale the length of which was a multiple of the length of the rule itself, to permit more precise calculations to be performed, was proposed by William Nicholson in 1787.
	www.quadibloc.com /math/sr03.htm (3330 words)

	Slide Rules at MROB
		I am obsessed with large numbers, and as a child I was developing this keen interest just at the time when slide rules were beginning to become obsolete (and were therefore cheap) but calculators were still out of my price range.
		Slide rules go back hundreds of years, with new designs keeping almost all elements of a previous popular design to make it easier for people to adjust to the new rule.
		Always follow the rule that if x is set against 1 or 10, the answer is read on the scale directly adjacent to y, and if x is set against r, the answer is read from y to the opposite W scale using the cursor.
	www.mrob.com /pub/math/sliderules.html (2515 words)

	Slide Rules (Site not responding. Last check: 2007-10-11)
		This is a large slide rule that is made to hang on the wall of the classroom above the chalk board.
		This rule is, in my opinion, the most handsome slide rule ever made by K+E, or, in fact, by any other slide rule manufacturer.
		There are no scales on the reverse of the slide; only the serial number of the rule is engraved on the reverse of the slide.
	www.tbullock.com /sliderule.html (1196 words)

	SRTC: Slide Rules for Sale
		Slide rule consists of a single stator with scales D and A and a single slide with scales CI and C. The slide is held to the stator by a full-length plated spring metal bracket.
		Rule is new, shiny, and unscratched except fixed acrylic sheet is unobtrusively cracked in one corner.
		But rule is slightly warped so that it rocks on a flat table and glue between magnifier and flat glass has yellowed.
	home.att.net /~ross1/SRTC/Rules.htm (1425 words)

	A Collection of Slide Rules
		Scales: A, [B, CI, C], D, K. Rear of slide: S, L, T. The slide rule is mounted on a plastic base, with a 12" ruler at the top and a 24cm ruler at the bottom.
		This is not truly a slide rule, but a series of value tables aligned by means of a large, plastic, hairlined cursor (the only moving part) and used for aiming a 155mm field piece.
		This is a specialized rule for aerial photograph analysis, is in a plastic wrapper, and the rule and manual are in a slide-in cardboard box.
	home.neo.rr.com /ccliff/slide_rule.htm (5740 words)

	Untitled Document
		As the manufacturer of most of the Post rules, Hemmi is the most familiar Asian slide rule maker to those of us in the U.S. Hemmi also sold rules under its own name and others (Hughes-Owens in Canada, for instance).
		The Otis King Calculators are long-scale slide rules in which the scale has been wrapped in a spiral around a cylinder.
		Pickett rules are distinctive for their metal construction, as opposed to the traditional wood or bamboo cores used by most other makers.
	www.toddtolhurst.com /sliderules (760 words)

	Slide Rules
		By the late 17th century, the slide rule was a common instrument with many variations.
		Some slide rule manuals contain relatively exhaustive explanations of the theory underlying the operations.
		The single sided rule similar to a Polyphase but with and inverted A scale (typically labeled R) instead of an inverted C scale (CI).
	www.hpmuseum.org /sliderul.htm (669 words)

	David Crate's Quality Slide Rules
		As most slide rules have a common set of scales, one can generally get by without a manual, or with a manual from another model rule.
		It seems that slide rules represent, for me, the optimal collector's item in that they are found at the intersection of three rather synergistic realms: 1.
		Rarity - slide rules are at the wonderful time in their history when no one makes them (as far as I know) but there are still a fair number around and the people that remember using them are still around, too.
	davidcrate.com /index.html (1096 words)

	Commercial slide rules
		It includes trig scales, with a sine scale on both the slide and the stock and which would rarely be needed for commercial calculations, but does not have any log-log scales for compound interest calculations.
		as is normal on general purpose slide rules but not particularly relevant for commercial rules, however the cursor has special lines to enable multiplication by 360 or 365.
		Apart from the fact that the rule is folded at 360 and the scales have labelling (with German initial letters) suitable for business there is little to distinguish it from other rules.
	www.sliderules.clara.net /a-to-z/commercial/commercial2.htm (2058 words)

	Dave's House of Slide Rules (Site not responding. Last check: 2007-10-11)
		If there's no link associated with a rule, that probably just means i haven't gotten round to scanning it in yet (in the case of the two 20" KandE rules, they were just too darn big to fit on the scanner, so i didn't even bother saying anything about them.
		Anyway: Most of the pictures show the front and back of the rule, except where the back of the rule wasn't worth seeing or i was too lazy to scan both sides of the rule.
		if you're looking for slide rules, i'd suggest starting at flea markets, garage sales, and antique stores near you; even antique stores frequently have extremely affordable slide rules (it's rarely necessary to spend more than $40 to get a good rule; they can usually be found for $20 or less).
	foraker.research.att.com /~davek/slide (628 words)

	Library of Economics and Liberty: Frequently Asked Questions (FAQ)
		Another method is to point your cursor to a link to that spot, and then copy the exact location out of the "tool bar" at the bottom of your browser.
		A quick rule of thumb is that if a work was published before 1923, the content is no longer under copyright, and thus it is in the public domain.
		Vertical and horizontal rules, and other details of alignment are often sacrificed so long as the author's intent remains clear.
	www.econlib.org /library/faq.html (4844 words)

	Sphere's Low Cost (Cheap) Slide Rule Page - Slide Rules on-line!
		We scoured the world looking for inexpensive slide rules for learners and classes, and came up with a large quantity to pick from.
		Basic Mannheim format rule with a fl self-documenting scale arrangement and yellow highlighting of the A, B, C and D scales, it has Over-range scale extensions on A-D scales, and yellow end braces.
		Rietz format rule with a 2-color scale arrangement and yellow highlighting of the B and C scales, it has Over-range scale extensions on A-D scales and 3 trig scales.
	www.sphere.bc.ca /test/cheap.html (1691 words)

	Gomatoc (Site not responding. Last check: 2007-10-11)
		Under this rule a short sale cannot be executed unless the previous price movement in the stock was an upward one.
		Under the headings “Why study ice cores?” and “How is it done?” are slide shows that fill in the details.
		Those of you who are current Terminal Server administrators or who have read my past articles about the shadow key area of the Terminal Server registry know of the challenges of bringing new servers or adding hotfixes to production environments.
	gomatoc.halard.com (5182 words)

	The Gemmary's Slide Rules
		All slide rules in this list are offered by The Gemmary subject to prior sale and are returnable within ten days of receipt if not satisfactory for any reason.
		Shipping in the U.S. will be by priority mail, $4 for the first rule and $1 for each additional rule.
		Cajori, F. - "A History of the Logarithimic Slide Rule and Allied Instruments" together with "On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century," (Mendham, NJ: Astragal Press reprint, 1994), pp vi, 112; hardbound - $25
	www.gemmary.com /sliderules.html (668 words)

	ODLIS: Online Dictionary for Library and Information Science
		Hard point does not leave a graphic mark on the writing or drawing surface; instead, the application of pressure creates a visible furrow on one side of the sheet and a corresponding ridge on the other, a technique called scoring.
		As a general rule, donated materials containing highlighting are added to a library collection only in exceptional cases.
		Highlighting is also used in some computer applications to edit text by positioning the cursor at the beginning of a word, phrase, or entire passage, holding down the mouse button, and dragging the cursor to the end of the desired portion of text.
	lu.com /odlis/odlis_h.cfm (10070 words)

	Frank Potter's Science Gems - Physical Science I
		Laws, Rules, Principles, Effects, Paradoxes, Limits, Constants, Experiments, & Thought-Experiments in Physics - Author E.M Francis, HTML-version K. Hellig, Institute of Physics, Technical University Chemnitz-Zwickau Dictionary of 100's of physics terms and ideas.
		Their high reliability and low weight make them ideal for remote and space power generation applications...This is an interactive simulation of a the device.
		The temperature and voltage values at positions along each material arm can be obtained by clicking and dragging the cursor on each material.
	www.sciencegems.com /physical.html (5370 words)

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