US3721394A - Apparatus for uncoiling wire from a spool - Google Patents

Apparatus for uncoiling wire from a spool Download PDF

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Publication number
US3721394A
US3721394A US00155938A US3721394DA US3721394A US 3721394 A US3721394 A US 3721394A US 00155938 A US00155938 A US 00155938A US 3721394D A US3721394D A US 3721394DA US 3721394 A US3721394 A US 3721394A
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US
United States
Prior art keywords
spool
wire
magnet
turntable
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00155938A
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English (en)
Inventor
H Reiser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KM Kabelmetal AG filed Critical KM Kabelmetal AG
Application granted granted Critical
Publication of US3721394A publication Critical patent/US3721394A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B21C47/345—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the tension or advance of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B21C47/3466—Feeding or guiding devices not specially adapted to a particular type of apparatus by using specific means
    • B21C47/3483—Magnetic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
    • B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
    • B65H59/043—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support with a braking force varying proportionally to the diameter or the weight of the package being unwound
    • B65H59/046—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support with a braking force varying proportionally to the diameter or the weight of the package being unwound varying proportionally to the weight only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
    • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
    • H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/20—Actuating means angular
    • B65H2555/23—Actuating means angular magnetic, e.g. rotary solenoids
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators

Definitions

  • the turntable is axially spring biased and journalled for rotation about a vertical axis, whereby the effective air gap between the magnet and the disk is determined by resilient reaction of the spring to the weight of the spool. As wire is uncoiled, that weight decreases while the rotational speed of turntable and spool increase so that tension and withdrawal speed of the wire remain constant.
  • the present invention relates to apparatus and equipment for uncoiling a wire from a feed spool at constant speed and for maintaining tension exerted upon that wire likewise constant.
  • Uncoiling and withdrawal of wire at constant speed and tension is, for example, needed in equipment for insulating wire by enameling or varnishing.
  • the wire is usually insulated by two basic steps. First, wet varnish or enamel is deposited on the wire surface, and subsequently the varnish or enamel is baked onto the wire.
  • the resulting layer provides surface insulation which, of course, must meet particular requirements. For example, the layer must have particular insulating resistance and must have particular breakdown resistance and potential. Additionally, the wire must have predetermined mechanical properties, such as surface hardness, wear and abrasive resistance, stress-strain characteristics, tension module, etc.
  • the layer configuration must be as concentrical around the center axis of the wire as possible, so that the various characteristic parameters have no angular variation.
  • the insulating surface film must resist impregnating lacquers and their solvents during a subsequent impregnating process.
  • the insulation must not soften or peel off at the usual operating temperatures'to which coils or the like, made from such wire, are exposed during use.
  • the layer must also resist aging to a desired predetermined degree.
  • the wire must maintain elasticity and electrical insulative properties for at least 20,000 to 25,000 hours, and the varnish or enamel film must adhere sufficiently firmly to the wire surface throughout that period.
  • Tension in the wire is needed for properly introducing the wire into the furnace. Setting up tension requires that the wire be subjected to braking, which is provided usually on the feed and uncoiling equipment for the bare wire. For obtaining the above-mentioned properties of the varnish or enamel film, and particularly in order to maintain uniformity in these properties over the entire length of the continuously produced wire, it is necessary to provide and to maintain braking of the wire at a particular, constant force.
  • the present invention relates particularly to apparatus, where the spool or drum holding the bare wire rotates during uncoiling. It has to be considered additionally that semi-hard or hard uninsulated wires as supplied on spools have to be annealed (spheroidized) prior to enameling or varnishing.
  • uncoiled wire will traverse an annealing furnace accordingly. If relatively thick and hard uninsulated wire is uncoiled, utilization of rotating take-up devices may lead to difficulties.
  • the wire has to be taken up at a constant speed, and here it has to be taken into consideration that the feed spool will increase its rotational speed as uncoiling progresses. ilf the braking effect is speed dependent per se, and that is true to some extent for all friction brakes, speed dependency of braking must be offset.
  • pressure force exerted by the brake upon a moving part of the spool has to be adjusted, for example, manually, so as to maintain a constant relation between braking and pulling forces for the wire withdrawal. It was found to be very difficult, time-consuming and unreliable, to provide for such variable braking effort. The difficulties are compounded in case large numbers of individual wires are produced, varnished etc., and combined, e.g., by stranding. This requires a constant pay rate for each wire.-
  • an eddy current brake is provided, which is known per se, but presently the brake is to have a variable air gap so as to permit variation in the braking force.
  • the braking effort of an eddy current brake increases with relative rotational speed of magnetizing part and conductive element of the brake in which eddy current is induced.
  • widening the air gap reduces braking force.
  • the air gap width is determined by balance or equilibrium condition (on a quasistationary basis) between, e.g., a spring force and the weight of the spool from which wire is uncoiled.
  • the gap widens as the weight of the spool decreases, offsetting the increasing magnetic interaction due to speed increase.
  • weight decreases can be used as a criterium for the reduction in coil or winding radius. It is this reduction in coil radius which is directly responsible for the increase in rotational (angular) speed of the spool for constant (peripheral) withdrawal speed of the wire.
  • weight decrease may operate directly for gap width control.
  • the spool from which to uncoil wire has vertical position and is preferably seated on a turntable that is journalled on a vertical shaft extending from a stationary base.
  • a spring acts in axial direction on spool and turntable, against the weight thereof.
  • the stationary part of an eddy current brake e.g. the magnetizing component
  • the turntable serves as the rotating part (armature) in which eddy current is induced upon crossing the field lines provided by the magnetizing part.
  • the weight of the spool decreases; accordingly, the spring biases relaxes so as to lift the turntable higher above the magnetizing part of the brake.
  • the air gap increases, so that, in the balance, the braking force remains constant to obtain constant payout speed and also constant tension in the wire.
  • FIGURE illustrates somewhat schematically a cross section view of an uncoiling device with a brake constructed in accordance with the preferred embodiment of the present invention.
  • a base 1 constructed as a carriage and serving as basic support element for a spool 2 that may contain uninsulated, bare wire.
  • a shaft or axle 3 is mounted on and bolted to carriage 1 in vertical position.
  • an eddy current brake having a stationary support plate 4, likewise mounted on carriage 1.
  • the stationary part of the eddy current brake includes particularly an annularly shaped permanent magnet 5.
  • Spool 2 is indicated by the dash-dot lines and wire wound thereon is not included, but one can readily see that spool 2 is provided for holding many layers of coiled wire.
  • a turntable 6 is provided as immediate support for spool 2.
  • Turntable 6 is made of aluminum or copper, i.e., it has low electrical resistance as well as low magnetic permeability, so as to serve as co-acting, rotating part of the body current brake.
  • Turntable 6 has a lower, flat side facing magnet 5 axially across an air gap 56.
  • the upper part of turntable 6 is provided with annular steps, only two of them are shown in the drawing, but more could be provided. These steps permit placement of different size spools on the same tumtable. For each spool size there is provided a short insert to frictionally hold and receive the spool.
  • the turntable 6 is journalled on shaft 3.
  • table 6 has a cup-shaped hub portion 61 which is provided with a short internal sleeve 62, rotatably and slideably receiving the upper end of shaft 3.
  • the hub 61 receives a spring 7 and is, in fact, carried by the spring.
  • the lower end of spring 7 bears against a flange 41 of a bearing element or sleeve 42 that is capable of rotation but has fixed axial position on shaft 3.
  • Position of stationary and rotating parts of the eddy current brake can be exchanged in that the permanent magnet is attached to the turntable 6, and base 4 is a co-acting armature.
  • the brake as shown in the drawing operates as follows.
  • a full spool is seated on turntable 6, and its weight compresses spring 7 significantly, so that the balance of spring compression and weight of the spool establishes minimum distance between turntable and magnet, i.e., the width of air gap 56 has minimum value for the now beginning run.
  • a very heavy spool may cause turntable 6 to be seated on the magnet in engagement therewith, which is not desirable as the turntable should not abrasively slide over the magnet during uncoiling. It should be noted, however, that their is no danger that the turntable may stick to the magnet, as aluminum or copper cannot be magnetized.
  • a washer may be used to adjust the equilibrial position of the turntable for a particular. initial weight of a spool. That washer may be interposed between spring 7 and one of the two surfaces against which the spring bears.
  • rotational (angular) speed for constant withdrawal speed of the wire increases in direct proportion to the reducing winding radius of the wire as uncoiled from the spool.
  • rotational speed results in an increasein the inductive interaction between the magnet field of permanent magnet 5 and the opposing magnetic field as resulting from the eddy currents in the turntable, because the intensity of these currents increase with speed, so that actually the braking effect would continuously increase as wire is uncoiled.
  • the rotational speed of the turntable relative to the stationary magnet and, therefore, the brake effect increases proportionally to the inverse of a (radial) length dimension, while analogously the magnetic field becomes weaker, also inversely proportional to a (axial) length dimension due to the increase in size of the air gap.
  • these parameters can be adjusted so that, in fact, the brake force remains constant; the tension in the wire will, thus, remain constant and that, in turn, ensures constant uncoiling speed of the wire itself.
  • an apparatus for uncoiling wire from a spool at constant speed and tension which includes a base, a spool support means, and journalling means on the base for journalling the support means on the base and relative to a vertical axis, comprising:
  • an eddy current brake including magnet means and electrically conductive means, provided in spacedapart relation on the axis with an air gap in between and further provided for relative rotation on the axis in the magnetic field as provided by the magnet means, whereby the rotation as between the magnet means and the conductive means is retarded at magnitude depending upon the distance in axial direction as between magnet means and conductive means across the air gap;
  • one of the magnet means and of the electrically conductive means being mounted on the base
  • the other one of the magnet means and of the electrically conductive means being on or a part of the spool support means;
  • the means including resilient means for balancing the support means against the weight of the spool thereon and as journalled for rotation about the axis, so that the distance between the magnet means and the conductive means is dependent upon the resilient reaction of the resilient means to the weight of the spool, and the retarding force effective between the conductive means and the magnet means gradually diminishes as wire is uncoiled from the spool on the support means.
  • the spool support means being a turntable serving itself as electrically conductive means, the magnet means mounted on the base.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
US00155938A 1970-07-03 1971-06-23 Apparatus for uncoiling wire from a spool Expired - Lifetime US3721394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702032935 DE2032935A1 (de) 1970-07-03 1970-07-03 Vorrichtung zur Konstanthaltung von Geschwindigkeit und Zugkraft eines von einer Spule ablaufenden Drahtes

Publications (1)

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US3721394A true US3721394A (en) 1973-03-20

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US00155938A Expired - Lifetime US3721394A (en) 1970-07-03 1971-06-23 Apparatus for uncoiling wire from a spool

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US (1) US3721394A (de)
AT (1) AT302442B (de)
CH (1) CH518869A (de)
DE (1) DE2032935A1 (de)
FR (1) FR2097772A5 (de)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952962A (en) * 1974-07-20 1976-04-27 Mackley-Ace Limited Cable drums
FR2317213A1 (fr) * 1975-07-07 1977-02-04 Olier Ets Dispositif de reglage du deroulement du fil d'une bobine
US4184647A (en) * 1977-02-07 1980-01-22 Rourke Arthur G Electrical cable unwinder
US4946115A (en) * 1988-06-22 1990-08-07 Mueller Gerhard Device for taking up a line
US5884860A (en) * 1996-03-19 1999-03-23 Ricoh Company, Ltd. Rolled paper feeding apparatus which provides a constant torque for uncurling paper and a torque limiting device therefor
US6676068B2 (en) * 2000-12-04 2004-01-13 James Emes Spool support apparatus and method of use of the same
US20060151659A1 (en) * 2005-01-10 2006-07-13 Anderson Martin L Strip winding machine
US7604195B1 (en) * 2008-05-29 2009-10-20 Chien-Fa Lai Strapping head assembly for a wrapping machine
US20100001116A1 (en) * 2006-04-26 2010-01-07 Johnson James H Dispenser for coiled materials
WO2010104405A2 (en) 2009-03-10 2010-09-16 Holmes Solutions Limited Improvements in and relating to braking mechanisms
WO2015082736A1 (es) * 2013-12-05 2015-06-11 Marin Andres Vicente Plataforma desbobinadora
WO2016029060A1 (en) * 2014-08-20 2016-02-25 Mcgowan John Lewis Eddy current braking device for rotary systems
WO2017021946A3 (en) * 2015-08-05 2017-03-16 Lenaghan Pádraic A holder
US10020720B2 (en) 2014-08-18 2018-07-10 Eddy Current Limited Partnership Latching devices
US10110089B2 (en) 2014-08-18 2018-10-23 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US20180325335A1 (en) * 2017-04-10 2018-11-15 William Holden Magnetic Resistance for Rolled Material Dispensers
US10300397B2 (en) 2013-12-16 2019-05-28 Eddy Current Limited Partnership Assembly to control or govern relative speed of movement between parts
US10498210B2 (en) 2014-08-18 2019-12-03 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US10693360B2 (en) 2014-12-04 2020-06-23 Eddy Current Limited Partnership Transmissions incorporating eddy current braking
US10774887B2 (en) 2014-12-04 2020-09-15 Eddy Current Limited Partnership Latch activation between members
CN111824846A (zh) * 2020-07-20 2020-10-27 江苏兴达钢帘线股份有限公司 一种恒张力永磁放线座
US10940339B2 (en) 2014-12-04 2021-03-09 Eddy Current Limited Partnership Energy absorbing apparatus
US10953848B2 (en) 2015-12-18 2021-03-23 Eddy Current Limited Partnership Variable behavior control mechanism for a motive system
US11050336B2 (en) 2014-12-04 2021-06-29 Eddy Current Limited Partnership Methods of altering eddy current interactions
US11114930B2 (en) 2014-12-04 2021-09-07 Eddy Current Limited Partnership Eddy current brake configurations
US12186596B2 (en) 2019-09-20 2025-01-07 TruBlue LLC Lock-off descent control systems and devices
US12521578B2 (en) 2020-03-18 2026-01-13 TruBlue LLC Line dispensing devices

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DE102007022883B4 (de) * 2007-05-14 2009-04-09 Tridelta Magnetsysteme Gmbh Vorrichtung zur Aufnahme und zum Abwickeln von Endlosmaterial

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952962A (en) * 1974-07-20 1976-04-27 Mackley-Ace Limited Cable drums
FR2317213A1 (fr) * 1975-07-07 1977-02-04 Olier Ets Dispositif de reglage du deroulement du fil d'une bobine
US4184647A (en) * 1977-02-07 1980-01-22 Rourke Arthur G Electrical cable unwinder
US4946115A (en) * 1988-06-22 1990-08-07 Mueller Gerhard Device for taking up a line
US5884860A (en) * 1996-03-19 1999-03-23 Ricoh Company, Ltd. Rolled paper feeding apparatus which provides a constant torque for uncurling paper and a torque limiting device therefor
US6676068B2 (en) * 2000-12-04 2004-01-13 James Emes Spool support apparatus and method of use of the same
US20060151659A1 (en) * 2005-01-10 2006-07-13 Anderson Martin L Strip winding machine
US7281677B2 (en) * 2005-01-10 2007-10-16 National Carpet Equipment, Inc. Strip winding machine
US7832681B2 (en) * 2006-04-26 2010-11-16 Johnson James H Dispenser for coiled materials
US20100001116A1 (en) * 2006-04-26 2010-01-07 Johnson James H Dispenser for coiled materials
US7604195B1 (en) * 2008-05-29 2009-10-20 Chien-Fa Lai Strapping head assembly for a wrapping machine
CN102428633A (zh) * 2009-03-10 2012-04-25 霍姆斯解决方案有限公司 制动机构的改进及与制动机构相关的改进
US10518115B2 (en) 2009-03-10 2019-12-31 Eddy Current Limited Partnership Braking mechanisms
US8851235B2 (en) 2009-03-10 2014-10-07 Eddy Current Limited Partnership Braking mechanisms
US12268904B2 (en) 2009-03-10 2025-04-08 Eddy Current Limited Partnership Braking mechanisms
CN102428633B (zh) * 2009-03-10 2016-04-27 涡流有限合伙公司 涡流制动机构以及自动保护装置
US11123580B2 (en) 2009-03-10 2021-09-21 Eddy Current Limited Partnership Line dispensing device with Eddy current braking for use with climbing and evacuation
US10065054B2 (en) 2009-03-10 2018-09-04 Eddy Current Limited Partnership Braking mechanisms
WO2010104405A2 (en) 2009-03-10 2010-09-16 Holmes Solutions Limited Improvements in and relating to braking mechanisms
WO2015082736A1 (es) * 2013-12-05 2015-06-11 Marin Andres Vicente Plataforma desbobinadora
US11628373B2 (en) 2013-12-16 2023-04-18 Eddy Current Limited Partnership Assembly to control or govern relative speed of movement between parts
US11266917B2 (en) 2013-12-16 2022-03-08 Eddy Current Limited Partnership Assembly to control or govern relative speed of movement between parts
US10603596B2 (en) 2013-12-16 2020-03-31 Eddy Current Limited Partnership Assembly to control or govern relative speed of movement between parts
US10300397B2 (en) 2013-12-16 2019-05-28 Eddy Current Limited Partnership Assembly to control or govern relative speed of movement between parts
US10594200B2 (en) 2014-08-18 2020-03-17 Eddy Current Limited Partnership Latching devices
US10020720B2 (en) 2014-08-18 2018-07-10 Eddy Current Limited Partnership Latching devices
US11735992B2 (en) 2014-08-18 2023-08-22 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US11632016B2 (en) 2014-08-18 2023-04-18 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US10110089B2 (en) 2014-08-18 2018-10-23 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US11515776B2 (en) 2014-08-18 2022-11-29 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US11437903B2 (en) 2014-08-18 2022-09-06 Eddy Current Limited Partnership Latching devices
US11316404B2 (en) 2014-08-18 2022-04-26 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US10498210B2 (en) 2014-08-18 2019-12-03 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US10873242B2 (en) 2014-08-18 2020-12-22 Eddy Current Limited Partnership Tuning of a kinematic relationship between members
US10971988B2 (en) 2014-08-18 2021-04-06 Eddy Current Limited Partnership Latching devices
US10035421B2 (en) 2014-08-20 2018-07-31 Hi Tech Llc Eddy current braking device for linear systems
US10532662B2 (en) 2014-08-20 2020-01-14 TruBlue LLC Eddy current braking device for rotary systems
WO2016029060A1 (en) * 2014-08-20 2016-02-25 Mcgowan John Lewis Eddy current braking device for rotary systems
US12281681B2 (en) 2014-12-04 2025-04-22 Surewerx Usa, Inc. Latch activation between members
US11114930B2 (en) 2014-12-04 2021-09-07 Eddy Current Limited Partnership Eddy current brake configurations
US11050336B2 (en) 2014-12-04 2021-06-29 Eddy Current Limited Partnership Methods of altering eddy current interactions
US11992713B2 (en) 2014-12-04 2024-05-28 Eddy Current Limited Partnership Energy absorbing apparatus
US10774887B2 (en) 2014-12-04 2020-09-15 Eddy Current Limited Partnership Latch activation between members
US10693360B2 (en) 2014-12-04 2020-06-23 Eddy Current Limited Partnership Transmissions incorporating eddy current braking
US11499596B2 (en) 2014-12-04 2022-11-15 Eddy Current Limited Partnership Latch activation between members
US11009089B2 (en) 2014-12-04 2021-05-18 Eddy Current Limited Partnership Latch activation between members
US12009721B2 (en) 2014-12-04 2024-06-11 Eddy Current Limited Partnership Eddy current brake configurations
US10940339B2 (en) 2014-12-04 2021-03-09 Eddy Current Limited Partnership Energy absorbing apparatus
US11777391B2 (en) 2014-12-04 2023-10-03 Eddy Current Limited Partnership Methods of altering eddy current interactions
WO2017021946A3 (en) * 2015-08-05 2017-03-16 Lenaghan Pádraic A holder
US11878651B2 (en) 2015-12-18 2024-01-23 Eddy Current Limited Partnership Variable behavior control mechanism for a motive system
US10953848B2 (en) 2015-12-18 2021-03-23 Eddy Current Limited Partnership Variable behavior control mechanism for a motive system
US12606124B2 (en) 2015-12-18 2026-04-21 Surewerx Usa, Inc. Variable behavior control mechanism for a motive system
US20180325335A1 (en) * 2017-04-10 2018-11-15 William Holden Magnetic Resistance for Rolled Material Dispensers
US10682023B2 (en) * 2017-04-10 2020-06-16 William Holden Magnetic resistance for rolled material dispensers
US12186596B2 (en) 2019-09-20 2025-01-07 TruBlue LLC Lock-off descent control systems and devices
US12521578B2 (en) 2020-03-18 2026-01-13 TruBlue LLC Line dispensing devices
CN111824846A (zh) * 2020-07-20 2020-10-27 江苏兴达钢帘线股份有限公司 一种恒张力永磁放线座

Also Published As

Publication number Publication date
FR2097772A5 (de) 1972-03-03
DE2032935A1 (de) 1972-01-13
AT302442B (de) 1972-10-10
CH518869A (de) 1972-02-15

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