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Topic: Verge escapement

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	Verge escapement - Wikipedia, the free encyclopedia
		The verge escapement is the earliest known type of escapement, the mechanism in a clock that maintains the swinging of a pendulum.
		Verge escapements were used for almost all clocks until the anchor escapement was introduced around 1671.
		Recoil and friction interfere with the free swinging of the pendulum, as is the case in the anchor escapement.
	en.wikipedia.org /wiki/Verge_escapement (541 words)

	Bricks and Brass: Clock Escapement (Site not responding. Last check: 2007-11-03)
		Pegs ('palletts') on the verge are pushed by the teeth of the crown, oscillating the balance wheel.
		Anchor escapements are typical from the late 17th century to the middle of the 19th.
		In a bracket clock, the escapement was usually a verge in the 17th and 18th centuries, but some in the late 18th century used a short pendulum with an anchor escapement.
	www.bricksandbrass.co.uk /decfeat/dfclock/clkescape.htm (271 words)

	Verge (gaming) - Wikipedia, the free encyclopedia
		Verge (which stands for Vecna's Extraordinary Roleplaying Game Engine) is game engine intended to allow users to design their own computer role-playing games, particularly console-style, 2D games along the lines of Final Fantasy VI.
		Verge 2 - a new version of Verge which added many new features, such as variable sized.chr sprites, ability for the user to declare variables and functions and pre-processor statements in a C-like manner.
		Verge 3 - the latest version of Verge for both Mac and Windows builds which includes such features as: high color, networking, mouse, joysticks and gamepads, clipboard, declaration of C-like structures, support for loading common image formats (GIF, PNG, PCX, JPEG), and support for loading audio and module formats (MP3, IT, S3M, WAV, Ogg Vorbis).
	en.wikipedia.org /wiki/Verge (739 words)

	Common Terms Defined
		In a watch movement with a verge escapement, the flag-shaped balance staff moves a 'verge' against a crown gear, releasing the power from the spring to the motion works.
		Verge movements are almost always fusee driven, but fusee movements are not always verge escapements.
		The lever escapement uses a rounded 'roller jewel' (or a pin, in cheaper movements) set into a round plate on the balance staff in parallel position to the balance wheel.
	patriot.net /~dodz/Watch_Guide/Common_Terms_Defined/common_terms_defined.html (721 words)

	Clock Escapements (Site not responding. Last check: 2007-11-03)
		The escapement is the heart of a clock and a good escapement is esential for consistent timekeeping and reliability.
		Escapements take many forms, from the crownwheel-and-verge used since medieval times to the highly sophisticated escapements used in precision regulator clocks and chronometers.
		Other types of escapement are also considered, such as small-span anchor pallets, the escapement used in 400-day clocks, pin-pallet and pin-wheel escapements, as well as more sophisticated designs such as gravity escapements and Harrison's grasshopper escapement.
	www.mayfieldbooks.freeserve.co.uk /mbp2.html (364 words)

	Compass - Glossary (Site not responding. Last check: 2007-11-03)
		In watches the escapement consists of an escape wheel, commonly called the crown wheel and two pallets on an axle or arbor, known as the verge, to which the balance is attached.
		The verge escapement was applied to watches from the time they were first made in the early part of the 16th century and continued in use until about 1850, long after the introduction of other escapements during the 18th century.
		In clocks, the escapement is known from as early as the 15th century and was still in use for portable clocks as late as the mid 19th century.
	www.british-museum.ac.uk /compass/ixbin/hixclient.exe?_IXDB_=compass&_IXFIRST_=1&_IXMAXHITS_=1&_IXSPFX_=text/glossary/&$+with+all_unique_id_index+is+ENC5579=.&_IXlink=1&submit-button=summary (175 words)

	Verge escapement - Definition, explanation
		The verge escapement is the earliest known type of escapement, the mechanism in a clock that regulates the swinging of a pendulum for accurate timekeeping.
		Verge escapements were used for almost all clocks until Robert Hooke introduced the anchor escapement around 1657, and continued to be built until the 1800s.
		The verge escapment, also known as the crown-wheel-verge relies on the angular momentum of a large wheel to slow the motion of a powered crown gear.
	www.calsky.com /lexikon/en/txt/v/ve/verge_escapement.php (527 words)

	escapement, clock sounds, clock movements - south africa
		An escapement in which impulse is given to the controlling device, a swinging pendulum or an oscillating balance, at every oscillation of balance or swing of the pendulum.
		The escapement is similar to the verge escapement, but here, the two pallets are mounted on separate arbors which are geared together by toothed sectors mounted on the arbors.
		As the foliot or balance swings to and fro it causes the pallets or flags on the verge to alternately intercept and release the teethe of the crown wheel allowing it to turn only one tooth at a time and at the rate at which the foliot, balance or pendulum is swinging.
	www.holtzhausen.com /et-escapement.html (468 words)

	Anchor Clock Escapement
		The pallets of the anchor escapement are positioned much farther away from the axis of rotation, thereby requiring a much lower angle of rotation to obtain the same arc.
		In the original recoil anchor escapement, the teeth may lean backward to avoid being at right angles to the pallet surfaces and reduce the risk of accidental damage to the tips of the teeth.
		The anchor escapement is not self-starting since the energy that is transferred from the escape wheel to the pallets is only sufficient to overcome the effects of friction, but it is not sufficient to make the pendulum start oscillating.
	www.abbeyclock.com /anchor.html (3989 words)

	International Auctioneers
		the spring-driven brass fusee and chain movement striking the hours, verge escapement, engraved metal dial with a ring indicating the hours and minutes, date indication and exposed double pendulum, inscribed "London", the fl matted moulded case with a brass handle, height 48 cm, a key, England,...
		the spring-driven rake and bell striking movement chiming the half-hours, repeating, verge escapement, the partially engraved face with an enamelled dial indicating hours and minutes, inlaid with a porcelain roudel painted with a landscape, the veneered and fl matted case partially decorated...
		the spring-driven brass movement striking the hours on a bell, verge escapement, repeating, the profusely engraved brass face applied with a white enamelled dial and signature plaque, inscribed Johann Michael Edlinger in Wien, the ebonised hardwood case with giltwood decoration and brass mounts,...
	www.internationalauctioneers.com /int/auction_lots.asp?aucid=870 (1044 words)

	VERGE. In the limited sense the verge is the rod or spindle upon which the balance or foliot is mounted. It carries two ...
		In the limited sense the verge is the rod or spindle upon which the balance or foliot is mounted.
		A vertical arbor (the verge) is at right angles to the crown wheel and has two pallets or 'flags' separated by a distance approximating to the diameter of the crown wheel and at an angle of approximately 100 degrees to each other.
		The verge carries at its upper end a balance and is pivoted at its two extremities.
	home.datacomm.ch /rbu/v.html (609 words)

	Glossary
		Type of clock fitted with a platform escapement to enable it to be moved without the problems of putting the clock in-beat usually in a gilded brass case with glass panels all round.
		Early weight driven 30 hour clock with brass case with 4 posts at the corners and bell at the top, with a verge escapement and in the earliest clocks a balance wheel foliot later with a pendulum made c.1630-1730.
		In a pendulum or weight driven clock, pallets are the faces of the verge (Often jewels.) The part of the platform escapement that takes power from the escape wheel and delivers it to the movement with each oscillation of the balance wheel.
	www.bsrgroup.org /glossary.htm (2374 words)

	The fusee
		The old verge watch was so influenced by changes in mainspring power that it hardly deserved the title of a timekeeper unless it was provided with a mechanism to counteract these irregularities.
		The verge escapement was replaced by the resting escapements, particularly the cylinder escapement.
		The duplex escapement works in a similar way; while the free escapements, which do not have a correcting friction, achieve their high independence from power variations only by a prudent adjustment of the balance spring.
	www.angelfire.com /ut/horology/gbk/gbkt1.html (1958 words)

	Clocks
		This verge was connected to an arm with a hammer on the end that struck the bell.
		This mechanism, the verge and foliot, is a mechanical relaxation oscillator, the balance beam or foliot being positively driven in one direction, brought to a stand, and impelled in the other direction at the end of each half-period.
		Now that the verge did not have to drive a heavy foliot, and was only required to sustain the oscillations of a pendulum, which would naturally reverse itself at the ends of its path by the action of gravity, the escapement could be redesigned accordingly.
	www.du.edu /~jcalvert/tech/machines/clocks.htm (3129 words)

	Science Museum \| Huygens' clocks \| The advantages of having a pendulum (Site not responding. Last check: 2007-11-03)
		The mechanism for controlling the movement of a clock is called an escapement and this type is known as a verge escapement.
		It is only slightly altered by the type of escapement used or the size of the swing, as long as this is not very large.
		This kind of escapement also allows one tooth of the wheel to pass each time the pendulum completes a swing but it requires a smaller swing angle than a verge escapement does.
	www.sciencemuseum.org.uk /on-line/huygens/page2.asp (399 words)

	[No title]
		This clock, which has a very fine six pillar three train movement with verge escapement and a beautiful florally engraved backplate with a casket of flowers in the centre, plays one of two tunes at the hour employing eight bells and fifteen hammers.
		The five pillar movement with verge escapement and pull quarter repeat on six bells, has a beautifully engraved backplate with a mythical bird in the centre together with floral engraving.
		The massive 8 pillar movement with verge escapement chimes and repeats the quarters on six bells, and is signed on the beautiful florally engraved backplate.
	www.antique-horology.org /hereismore/Nomenclature/bracket.htm (4623 words)

	Answers to Questions About Watches - Questions in Time - Watch Industry Questions and Answers (Site not responding. Last check: 2007-11-03)
		The lever escapement was the invention of the Englishman, Thomas Mudge (1715-1794).
		The gain in energy in relation to the lever escapement system is deceptive because of the gearing ratio of the two wheels and the sum of their inertia.
		The principal advantage of the coaxial escapement is the transmission of force in a quasi-tangential manner, which minimises the losses due to friction, reduces wear and tear, and eliminates the need for lubricating the escapement.
	www.europastar.com /europastar/watch_tech/nicolet8.jsp (2472 words)

	Science Museum \| Huygens' clocks \| Later Clocks (Site not responding. Last check: 2007-11-03)
		The pendulum in a clock with an anchor escapement does not need to swing as far as one in a clock with a verge escapement.
		The anchor escapement, like the verge escapement, interferes with the pendulum's motion throughout the whole of its swing, which affects its timekeeping.
		The 'dead-beat' escapement, invented by George Graham in 1715, reduces this problem by giving the pendulum a short impulse when it is nearly vertical and allowing it to swing almost freely for the rest of the time.
	www.sciencemuseum.org.uk /on-line/huygens/page8.asp (520 words)

	Time over the Years
		All had the same basic problem: the period of oscillation of this escapement depended heavily on the amount of driving force and the amount of friction in the drive.
		And in London in 1671 William Clement began building clocks with the new "anchor" or "recoil" escapement, a substantial improvement over the verge because it interferes less with the motion of the pendulum.
		By 1761 he had built a marine chronometer with a spring and balance wheel escapement that won the British government's 1714 prize (of over $2,000,000 in today's currency) offered for a means of determining longitude to within one-half degree after a voyage to the West Indies.
	library.thinkquest.org /28906/time_over_the_years.htm (840 words)

	History of Watches - Clocksonly.com - Watch History
		In England, however, the verge and fusee were still used and, at the end of the period it was generally acknowledged that English watchmakers were producing the best watches.
		Verge watches were still in use in this period, and many of the improvements were aslo applied to them.
		While escapements such as the virgule and Pouzait gained some favour, the lever was gaining strength of numbers all the time.
	www.clocksonly.com /watch_history.html (5881 words)

	International Auctioneers
		Spring-driven mechanism, verge escapement striking the half hour on bell, with repeater, enamel dial with Roman numerals, round enamelled inset on gilt and richly engraved front dial, the case partly with oak and oak veneer, later painted with colourless paint, soundbox cover with fine fretwork and...
		Rectangular brass spring-driven movement, verge escapement, 1 day reserve, striking on the hour on bell, repeater, engraved brass dial with opening of sham pendulum, cast applications, blue-toned steel hands, ebonised wood case glazed on four sides, with two doors, pierced and engraved inlays, cast...
		Rectangular brass movement, spring-driven, verge escapement, 1 day reserve, striking the four quarter hours which can be switched to 1 quarter, with bells atop, striker off switch, repeater, central date, enamel picture with rustic motif, double bombé...
	www.internationalauctioneers.com /int/auction_lots.asp?aucid=5874 (1026 words)

	Mechanical timekeeping
		This is an example of a verge escapement, the oldest type of mechanical escapement.
		The escapement is the heart of a mechanical clock.
		Numerous types of escapement were developed over the centuries giving ever greater degrees of control and accuracy.
	www.stedmundsbury.gov.uk /sebc/visit/mechanicaltimekeeping.cfm (450 words)

	lantern clock archive (Site not responding. Last check: 2007-11-03)
		The style of the clock is typical of the period and that of the clocks being produced by the London makers.
		The verge escapement is not so sensitive to setting up and moving around as the anchor recoil and continued to be used on travelling and bracket clocks to the end of 18th century.
		The dial plate engraved with tulips and signed John Wise London, with central alarm disc, the posted movement with divided trains, verge escapement with anchor shaped bob oscillating between the train, outside countwheel striking on a top-mounted bell, the substantial frame with urn finials, tapered columns and ball feet.
	www.rchclocks.fsnet.co.uk /LCA.html (3737 words)

	European Clocks in the Seventeenth and Eighteenth Century \| Special Topics Page \| Timeline of Art History \| The ... (Site not responding. Last check: 2007-11-03)
		A new escapement had to be found to help shorten the arc, as well as to diminish the retarding effect that the older verge escapement had on the pendulum.
		The standard solution proved to be the anchor escapement regulated by a pendulum of slightly more than thirty-nine inches in length, giving a beat of one second and allowing seconds to be recorded on the dial of a clock without the use of complicated gearing.
		It The anchor escapement engages with the pendulum by means of a short rod, or crutch, attached to the arbor of the anchor at one end oand ending terminating on the other in a fork or slot that clasps the pendulum rod or a pin that fits within a slot in the pendulum rod.
	www.metmuseum.org /toah/hd/clck/hd_clck.htm (1825 words)

	The English Clock Collection
		The movement of this clock has an anchor (recoil) escapement with curiously shaped escape wheel teeth, which are similar to ordinary gear teeth and may have been considered more robust than the conventional type.
		Compared with the verge and bob pendulum, the anchor reduced the swing of a long pendulum to only 5 degrees, thus greatly improving timekeeping as well as making long duration clocks possible (i.e., 8 days or more).
		This is a later example of a clock with verge escapement.
	www.stedmundsbury.gov.uk /sebc/visit/theenglishclockcollection.cfm (996 words)

	Traveling of Carriage Clock
		Gilt brass and steel single-hand traveling clock with elongated fusee and cat-gut, verge escapement, steel two-arm balance, hour-striking and alarm.
		From the beginning, the movements of watches and clocks were generally made with a verge escapement, one that distributes the force to a foliot, or to a circular balance.
		The horizontal escapement would be fitted into clocks with exterior architectural characteristics and movements similar to those of the clocks shown here.
	www.antiquorum.com /html/vox/vox2003/traveling/traveling.htm (2492 words)

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