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Topic: Ratchet (device)

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	Adjustable support stand - US Patent 6685149 (Site not responding. Last check: 2007-10-07)
		The support stand of claim 4 wherein when the second outer end of the ratchet casing presses against the first outer end of the cavity and the ratchet casing prevents the pawl from engaging with the teeth of the ratchet, the ratchet is capable of being pushed into the ratchet casing.
		The support stand includes a ratchet casing capable of moving along a linear direction within the cavity of the housing, the cavity having an inner end and an outer end for limiting the ability of the ratchet casing to move within the cavity in the linear direction, and a ratchet disposed inside the ratchet casing.
		The ratchet includes a plurality of teeth and a protruding edge for limiting the ability of the ratchet to move in the linear direction, wherein the protruding edge moves between an inner end and an outer end of the ratchet casing.
	www.patentstorm.us /patents/6685149.html (2599 words)

	World Intellectual Property Organization (Site not responding. Last check: 2007-10-07)
		When a head section of the patient-support portion of the device is raised to move the patient from a supine position to a sitting position, it is not uncommon for the patient to slide down the head section and move toward a foot end of the device.
		In the disengaged state, the ratchet assembly 359 is configured to permit the roller 358 to spin about the axis 378 in both directions 360, 362 to facilitate unwrapping of the sheet 332 from the sheet gripper 344.
		The patient positioning apparatus of claim 21, wherein the sheet gripper comprises a housing in which the ratchet assembly and the winder are positioned and a handle that is accessible outside the housing and that is movable to move the ratchet assembly between the latched and unlatched positions.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=03/105743.031224&ELEMENT_SET=DECL (9589 words)

	Brownian ratchet - Wikipedia, the free encyclopedia
		The Brownian ratchet is a thought experiment about an apparent perpetual motion machine postulated by Richard Feynman in a physics lecture at the California Institute of Technology on May 11, 1962 as an illustration of the laws of thermodynamics.
		The device consists of a gear with a ratchet, that vibrates under Brownian motion (hence the name) in a heat bath.
		Although the Brownian ratchet seems, at first sight, to extract useful work from Brownian motion, Feynman demonstrated through a number of detailed arguments that its operation would be self-defeating, and would in fact not produce any work.
	en.wikipedia.org /wiki/Brownian_ratchet (320 words)

	Ratchet (device) - Wikipedia, the free encyclopedia
		In mechanical engineering a ratchet is a device used to restrict motion in one direction.
		This sort of behaviour is useful in many areas, such as in turnstile, spanners (where rotation in confined surfaces can be achieved easily), winders, jacks, and others.
		Ratchets work generally by having a form of gearwheel or rack that, instead of having regular teeth, have teeth set off at an angle.
	en.wikipedia.org /wiki/Ratchet_(device) (355 words)

	Stanford scientists use noise to sort proteins
		The device, which sorts molecules found in the cell membrane, is powered by an unconventional energy source, 'thermal noise' -- the random variations in energy found in a population of molecules at a given temperature.
		The array is a realization of a theoretical device called a Brownian ratchet, popularized by Nobel physicist Richard Feynman, who used it to illustrate the inviolability of the second law of thermodynamics, the law that explains why it is always easier to make a mess than it is to clean it up.
		An analogy for the operation of the membrane ratchet is a bar filled with drunken sailors (a common term for random motion is a drunken sailor's walk).
	www.eurekalert.org /pub_releases/1999-08/SU-Ssun-130899.php (1322 words)

	Mechanical actuation simulator - Patent 4058026
		Such mechanical devices gave the operator the feeling of at least partially contributing to and determining or selecting winning combination on the discs, depending on the force applied to the handle during the pull actuation of the apparatus.
		The device of the present invention which accomplishes these objects is rugged, has relatively few components, and provides a desired sound and feel of a mechanical actuated handle pull apparatus without affecting the electric actuation or operation of the machine to which it is attached in any substantial way.
		Ratchet pawl arm 12 is also biased downwardly by damper spring 18 which is secured to the arm at upper socket screw 15 while the lower spring end is secured to the mounting plate by lower socket screw 11.
	www.freepatentsonline.com /4058026.html (2331 words)

	World Intellectual Property Organization (Site not responding. Last check: 2007-10-07)
		The ratchet mechanism 16 prevents reverse rotation and removal of the child-resistant safety cover 7 unless the cover 7 is squeezed or otherwise deformed to release engagement of the projecting tab (s) on the cover 7 from the ratchet mechanism 16 formed on the nozzle 12 or wand assembly 8.
		The child-resistant fluid delivery device according to claim 8, wherein the at least one inwardly projecting tab may be disengaged from the ratchet teeth by deforming the child-resistant cover to permit rotation of the cover relative to the nozzle in the opposing direction to remove the cover from the nozzle.
		The wand assembly according to claim 27, wherein the at least one inwardly projecting tab may be disengaged from the ratchet teeth by deforming the child-resistant cover to permit rotation of the cover relative to the nozzle in the opposing direction to remove the cover from the nozzle.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=01/87724.011122&ELEMENT_SET=DECL (4093 words)

	Wire-driving device for window regulator - Patent 4428542
		Also, because the device comprises two pulleys coaxially on a shaft, this device is very thick, and as a result, a wide space is required for a window regulator in a door panel of an automobile.
		Each mesh direction of the ratchet teeth 6b and 7b is determined so as to transmit the rotational torque from the second gear 6 to the second pulley 7, when the second pulley 7 is rotated in the direction for winding up the wire.
		The drawing device end of the first wire 54 is engaged in a recess 3e perforated in the surface of the first pulley 3, and the drawing device end of the second wire 55 is engaged in a recess 7e perforated in the surface of the second pulley 7 as shown in FIGS.
	www.freepatentsonline.com /4428542.html (2022 words)

	Sheldon Brown's Bicycle Glossary R
		A bicycle's freewheel has a ratchet which causes the sprocket to turn the wheel forward when the rider pedals forward, but allowing the wheel to turn forward even when the pedals are not being turned.
		Ratchet wrenches turn a nut or bolt only when moved in one direction, leaving the nut or bolt in place when turned the other way.
		Most ratchets use spring-loaded pawls to engaged a toothed ring for forward drive, while the teeth in the ring slide over the ends of the pawls when freewheeling.
	www.sheldonbrown.com /gloss_r.html (4118 words)

	Pistol charging device - Patent 4055015
		A charging device as set forth in claim 1 further characterized by said holster having a hole therein adapted to register with an ejection port in said slide when said slide is engaged with said blocking means.
		Pivotably attached to the ratchet by pin 21 is handle 13 which extends through a suitable hole in the sheath to the exterior of the holster.
		3 the ratchet is spring biased toward a certain position in the sheath by spring 19 which surrounds the shaft of handle 13 and reacts against the wall of the sheath.
	www.freepatentsonline.com /4055015.html (1680 words)

	George Constantinesco: Inertial Transmission (US Patent 1591471 etc)
		In the form of unidirectional driving device shown at Figures 12, 13, and 14, the connecting rods from the prime mover are connected to the pins 21, 22 which are carried by sleeve members 23, 24 capable of oscillating about the shaft 25 on ball bearings 27.
		The locking of the device for driving the rotor in one direction is effected by pressure exerted through the slightly inclined rods 73, 74 which press through ball ends against the clutch members 69, 70 and he parts 67, 68 of the rotor which are keyed to the driven shaft by stout pins 75.
		The invention is also applicable to other type of ratchet devices and particularly to ratchets which are employed in combinations in which it is desired to maintain a definite mean position of the oscillating parts when there is no torque to be overcome at the driven shaft.
	www.rexresearch.com /constran/1constran.htm (7577 words)

	Ratchet (instrument) - Wikipedia, the free encyclopedia
		Operating on the principle of the ratchet device, a gearwheel and a stiff board is mounted on a handle, which can be freely rotated.
		Alternatively, smaller ratchets are sometimes held still or mounted and the handle turned rapidly by the player.
		One popular design has a thick wooden cog wheel attached to the handle and two wooden phlanges which alternately hit the teeth of the cog when the handle is turned.
	en.wikipedia.org /wiki/Ratchet_(instrument) (167 words)

	Climbing Hauling Ratchet (Site not responding. Last check: 2007-10-07)
		When constructing the Holding Ratchet, it’s critical that your hauling device be lowered to the correct pre-measured position.
		You want the teeth of the inverted ascender directly beneath the teeth of the hauling device when the Zed Cord is pulled tight at the top of the stroke, and the two pulleys are touching.
		Learning to operate your Hauling Ratchet is neither easy nor intuitive — the orientation of the components must be correct, the measurements precise, the tolerances tight, and the components static.
	www.climbing.com /techtips/aid/ttaid228 (718 words)

	MSN Encarta - Dictionary - ratchet
		turning device moving in one direction: a mechanism, used especially in lifting devices and some hand tools, consisting of a metal wheel operating with a catch that permits motion in only one direction
		ratchet wheel or pawl: either of the main parts of a ratchet device, the toothed wheel or bar, or the pawl
		transitive and intransitive verb move with ratchet: to move gradually up or down by means of a ratchet, or to move something in this way
	encarta.msn.com /dictionary_1861727251/ratchet.html (165 words)

	Introduction (Site not responding. Last check: 2007-10-07)
		A careful analysis of a device that, at first sight, seems to lift a weight using the thermal energy of a gas, reveals that there exists in fact a dissipation which prevents the failure of the second law of thermodynamics.
		However, due to the presence of the ratchet at the other end of the axle, only fluctuations in one direction, if they are strong enough, could make the ratchet lift the pawl and advance to the next notch [2].
		This example and the corresponding analysis, beside its pedagogical interest, is cited as a proof of the impossibility of an automatic device acting as a Maxwell demon [3] and has been also inspiration of a currently very active research field on transport induced by Brownian motion in asymmetric potentials [4].
	seneca.fis.ucm.es /parr/FEYNMAN/node1.html (703 words)

	Search Results for ratchet - Encyclopædia Britannica
		mechanical device that transmits intermittent rotary motion or permits a shaft to rotate in one direction but not in the opposite one.
		In the the arm A and the ratchet wheel B are both pivoted at...
		mechanical device used chiefly on board ships or in shipyards for moving heavy weights by means of ropes, cables, or chains.
	www.britannica.com /search?query=ratchet&submit=Find&source=MWTEXT (364 words)

	device (Site not responding. Last check: 2007-10-07)
		The initial anastomosis device featured two cylindrically shaped fixtures that interact (Fixures 1 and 2), with a graft vessel that runs inside of Fixture 1.
		To simplify the manufacturing of the device, it was decided to use stainless steel for each fixture.
		Prior to surgery, the graft is attached to the flange of fixture 1 by spikes that are attached to the flange.
	www.stanford.edu /class/me282/Anastomosis/device.html (383 words)

	History
		This device uses the motion of one motor to turn a wheel along the ground and propel the assembly forward, and the other motor to swing the first motor over the top of the device.
		In 3c, the device moves forward and then the bar shifts downward, lifting the oars off the ground, which is shown in Figure 3d.
		Figure 4 shows a side-view of the structure, and demonstrates the relationship of the front-end (which provides locomotion of the device) and the rest that will be designed to provide the least amount of resistance to the forward motion.
	www.ge.uiuc.edu /ge100/history3.htm (2116 words)

	deseretnews.com \| 'Commando' arsenal is tops
		A cat?) and his little robot sidekick Clank are commandos, working for Abercrombie Fizzwidget, commissioned to find a small furball of an "experiment" called a protopet that has been stolen by amazingly unattractive bad guys in a galaxy far away.
		And I loved wreaking havoc with a device that turns into lots of bouncing balls that have their own explosive power.
		Ratchet (with Clank on his back) hops into his spaceship and blasts across the galaxy like a star shooting through a field of stars.
	deseretnews.com /dn/view/0,1249,575039561,00.html (535 words)

	Ratchet effect solves one problem in superconductors
		A serious obstacle impeding the application of superconductor devices can be overcome by employing a common mechanism, the so-called "ratchet effect," according to a report by a team of in the July 22 publication of Nature.
		According to Barabasi, the ratchet effect has been studied mainly in biological contexts, such as molecular motors, but other previous applications have included particle separators and smoothing surfaces in molecular beam epitaxy.
		Otherwise, if the superconducting device is driven by alternating current for the desired application, the vortices will be eliminated continuously during the normal operation of the device.
	www.eurekalert.org /pub_releases/1999-07/UoND-Reso-230799.php (358 words)

	ratchet and pawl on Encyclopedia.com (Site not responding. Last check: 2007-10-07)
		The ratchet is usually a wheel with slanting teeth.
		The pawl is a lever tangential to the wheel with one end resting on the teeth.
		Spring rewind hose reel: separate ratchet is non-sparking.
	www.encyclopedia.com /html/r1/ratchetN1.asp (161 words)

	Ratchet Transfer Device (Site not responding. Last check: 2007-10-07)
		As attorney for the inventor of an innovative Ratchet Transfer Device we are currently seeking manufacturing companies to license, purchase patent rights or enter into a royalty agreement for this timely invention.
		This unique Ratchet Transfer Device is designed for transmitting down its length the action of a reversible ratchet of a socket wrench set to a hard-to-get-at hidden hex nut or bolt head.
		An element within the casing is for transmitting down its length the action of the square peg of the reversible ratchet handle in the rotatively coupling structure to the rotatively engaging component to turn the hex nut/hex bolt head in the work piece.
	www.invention.net /carver.htm (254 words)

	Ratchet Belt ~ The Fit That Clicks
		This unique style belt uses a 'ratchet' type device instead of the normal style belt with holes.
		The 'ratchet' type device is on the inside and unseen when worn.
		Put on or adjust your belt to the proper adjustment easily with the "ratchet" device on this ingenious belt.
	www.ratchetbelt.com /about.html (185 words)

	Ratcheting device - Patent 4347767
		This invention pertains to ratchet mechanisms, and has particular application to ratchet wrenches of the type employing removable sockets for engagement with a stud having a ball detent for holding the sockets thereto during wrench operation.
		The novelty of the invention resides in the use of a push-button selector for alternately effecting the reversing action of the ratchet mechanism in conjunction with a push-button device for releasing the sockets from the stud.
		Even so, changing of the ratcheting direction would prove difficult for a handicapped person having the use of only one hand, because said person would not be able to hold the wrench and simultaneously provide rotation to said selector knob.
	www.freepatentsonline.com /4347767.html (1850 words)

	Product Literature
		When the feedthru insert is installed, this ratchet base is torque actuated to release when the cam stem bottoms on the shoulder of the mating bushing well stud.
		The ratchet is calibrated to release at between 7 and 14 foot-pounds.
		Once the correct installation torque has been achieved and the ratchet device releases, an audible clicking of the ratchet device indicates to the installer that proper seating has been accomplished.
	www.cooperpower.com /library/literature/91038 (449 words)

	LINK Tools - What the World of Aviation is Saying (Site not responding. Last check: 2007-10-07)
		The locking device is like that found on air hose couplings, but a lot smoother and with less force required to lock and unlock.
		The ratchet also has a locking device, but this one requires that a knob be slid forward to drop the extension or socket from it.
		In my experience, it is not the ratchet that drops because it is firmly held in the technicians' hand while the socket and extensions, or universal joints, are another matter.
	www.link-tools.com /testimonial_Aviation.htm (2398 words)

	AllRefer.com - jack, mechanical device (Technology: Terms And Concepts) - Encyclopedia
		The lever jack, often used in lifting automobiles, has a lever combined with a ratchet; the lever is used to lift the load a small distance and the ratchet prevents the load from falling back while the lever is reset so that the process can be repeated.
		In the screw jack the load is moved or lifted by the turning of a screw; the pitch of the screw threads is arranged so that friction is sufficient to hold the load in place when the torque applied to the screw is released.
		In yet another form of jack a hydraulic device is used.
	reference.allrefer.com /encyclopedia/J/jack.html (248 words)

	1-to-2 multiplexor (Site not responding. Last check: 2007-10-07)
		On the front view, we see an unusual ratchet (see Baum's book) that either activate the left part (the selector) if the driver is turning counterclockwise, of the right part (the main switch) if the driver is turning clockwise.
		On the back, we see that the main switch (now on the left) is connected to a shock so that it will revert to off position if the driver is shut down.
		The selector (now on the right) is made of another ratchet (the yellow beam on top) that will turn the crown gear approximately 45 degree when the driver is shut down (because of a second shock).
	mapageweb.umontreal.ca /cousined/lego/3-Physics/Multiplexors/1to2_multiplexor.html (798 words)

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