US3777964A - Rod entry guide - Google Patents

Rod entry guide Download PDF

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Publication number
US3777964A
US3777964A US00247167A US3777964DA US3777964A US 3777964 A US3777964 A US 3777964A US 00247167 A US00247167 A US 00247167A US 3777964D A US3777964D A US 3777964DA US 3777964 A US3777964 A US 3777964A
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US
United States
Prior art keywords
pulley
rollers
rod
main pulley
set forth
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
US00247167A
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English (en)
Inventor
R Kruner
H Thelen
G Grunwald
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.)
Hydro Rene Luc
Original Assignee
Individual
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Publication of US3777964A publication Critical patent/US3777964A/en
Assigned to HYDRO RENE LUC reassignment HYDRO RENE LUC ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: POREL, LOUIS C.
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
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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
    • B21C47/02—Winding-up or coiling
    • B21C47/10—Winding-up or coiling by means of a moving guide
    • B21C47/14—Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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 OR PROFILES, 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
    • B21C47/3433—Feeding or guiding devices not specially adapted to a particular type of apparatus for guiding the leading end of the material, e.g. from or to a coiler
    • B21C47/3441—Diverting the leading end, e.g. from main flow to a coiling device

Definitions

  • ABSTRACT Mechanism consisting of a large driven pulley and a plurality of small rollers aligned along about 90 of the f O m vy n O: m r. we m6 e Br. eu b S 0,1 U h D 0 e um D4 [22] Filed: Apr. 24, 1972 pp 247,167 periphery of the driven pulley for changing the direction of rolled rod coming from a rod mill from horizontal to vertical for delivery to a laying reel or other rod collecting mechanism.
  • the small rollers in one form are carried by pivoted arms mounted on a support and are individually spring-pressed toward the driven pulley permitting acceptance therebetwcen of the oncoming rod and the application of correct pressure against the rod as it changes direction from horizontal to vertical.
  • the small rollers are carried by the links of a chain extending along the driven pulley perimeter. The chain is spring-loaded to permit entry L 6 0 5 n HM l a.
  • the mechanism comprises a rotating pulley and cooperating rotatable members, preferably in the form of small rollers, which together with intermediate fixed guide members set at an angle to correspond to the angle of deflection of said pulleys periphery, form the track along which the metal rod is guided.
  • Such apparatus is typically installed at the dis-charge end of a horizontally arranged water-quenching pipe. acts to change the direction of rod travel from horizontal to vertical and directs the rod through a vertical guide into a coiling reel.
  • An early form of mechanism using small outer rollers in in combination with a fixed inner track is shown in the German Utility Model Application No. 1,776,823 of 1958.
  • chain guide Another known apparatus of this type is the so-called chain guide, one form of which is shown in US. Pat. No. 3,100,070.
  • This features a large driven pulley ranging from 32 inches to 40 inches in diameter, provided with a groove about its periphery.
  • a pivoted arm thereabove, in a pivoted arm, is a spring-loaded yoke, in which two smaller pulleys are mounted.
  • a flexible toothed chain is passed around these pulleys.
  • the pivoted arm is swung downward, the links in-the lower strand of the chain make contact with the working face of the large driven pulley over an angle of approximately 90.
  • the back of the chain faces the rod and in others the teeth are directed toward the rod.
  • the pressure applied by the chain to the driven pulley can be varied.
  • the front end of the approaching rod drives between the periphery of the pulley and chain.
  • the frictional forces between the pulley, wire rod and chain enable the requisite forces to be generated for applying tension to the rod and changing the direction of rod travel.
  • the smaller pulley of this apparatus corresponds to the driven pul ley of the chain guide and the ring on the larger pulley takes the place of the chain.
  • the object of the present invention is to provide an apparatus for handling hot metal rods of the type initially described to avoid the drawbacks of prior art devices obtaining at rod speeds in excess of 7,860 feet per minute and especially in excess of 9,840 feet per minute and affording long service life.
  • the invention achieves this object through the provision of a plurality of rollers which cooperate with the driven pulley.
  • the number of said rollers should be as large as possible to minimize the intervals between the points at which the rollers arein contact with the driven pulley so as to obviate deflection of the rod especially when threading up.
  • the diameter of the rollers should not exceed about one-fifth the diameter of the large driven pulley.
  • a further feature of the invention is that the rollers are spring-loaded to press them against the periphery of the driven pulley.
  • the spring pressure should be adjustable and be of sufficient magnitude to ensure that during idle running the rollers are in positive contact with and caused to rotate by the driven pulley, thus dispensing with the need to furnish the rollers with individual driving means.
  • excessive spring pressure must not be exerted as this would result in deformation of the hot metal rod which usually has a temperature of 1,300 to 1,650 F as it passes between the driven pulley and the small rollers.
  • each of the rollers is mounted on a pivoted arm whose pivotal point, viewed in the direction of rod travel, is in front of or at the back of the rollers axis of rotation.
  • This arrangement enables the roller to move outwardly under spring pressure when contacted by the leading end of the oncoming rod without deforming said rod.
  • the rollers preferably are mounted on a pivoted unitary support permitting them to be moved as a group away from the driven pulley for replacement or repair.
  • the rollers are mounted between interconnected side bars which form in effect, a chain.
  • This roller assembly has a fixedpoint mounting on the delivery side and on the entry side is kept under spring tension. This arrangement also ensures that the leading end of the rod will not be deformed as it enters the guide and that the distance and pressure between the rollers and driven pulley may be varied to suit the working conditions.
  • Rollers provided with a shell of cemented carbide material or manufactured of cemented carbide throughout have an exceptionally long service life.
  • Pivoted guide members of offset arrangement are disposed about the periphery of the driven pulley. These members, which swing outwardly under centrifugal force, form a guideway for the rod and their outward movement is limited by a ring associated with the driven pulley.
  • the driven pulley With a plurality of pass sizes.
  • the appropriate pass may be brought into alignment with the delivered rod without the need for a switch.
  • the small wheels which do not change position have only a single groove.
  • a switch on the entry side may be used to direct the rod to the correct pass. In this latter case, the small wheels would have a plurality of passes aligned with the driven pulley passes.
  • FIG. 1 is a vertical section through the apparatus at right angles to the axis of the driven pulley.
  • FIG. 2 is a section taken along the line 2-2 of FIG. 1.
  • FIG. 3 is a plan view of a switch.
  • FIG. 4 is a section through a roller of the type shown in FIG. 1.
  • FIG. 5 is a side elevation similar to FIG. 1 of another embodiment of the invention.
  • FIG. 6 is a section taken on the line 66 of FIG. 5.
  • FIG. 7 is a fragmentary side elevation in much larger scale of another embodiment of the invention.
  • FIG. 8 is a section taken on the line 8-8 of FIG. 7.
  • FIG. 9 shows an embodiment to larger scale of the invention generally as shown in FIG. I, but with a driven pulley of different arrangement.
  • FIG. 10 is a section taken on the line l0-10 of FIG. 9.
  • a PREFERRED EMBODIMENT Pulley 1 is driven by an electric motor, not illustrated, and is mounted in a base member, also not illustrated, anchored to the foundation.
  • the driven pulley is preferably from 32 inches to 36 inches in diameter.
  • a three-sided roller box, or housing 2, pivoted on pivot 3 is also mounted on the base member.
  • the roller box which acts as a support for small rollers 7 can be raised from its working position, for servicing and maintenance purposes, for example, by means of a hydraulic piston and cylinder assembly 4, pivotally attached at 5 to the box 2.
  • Rollers 7 mounted on pivots extending between the ears of inverted U-shaped members 6 are contained in the roller box 2.
  • Members 6 are pivoted on link pins 8 extending across box 2.
  • the pins are located ahead of the axes 20 of the rollers 7 viewed in the direction of rod travel.
  • the rollers 7 are preferably individually spring-loaded with the aid of adjustable springs 9 positioned above the axes of the rollers.
  • Between the individual rollers 7 are spacers 10 preferably attached to the housing 2 which can be adjusted in the radial and circumferential directions with the aid of mechanical means not illustrated.
  • the side of each spacer 10 facing the driven pulley 1 has a curve corresponding to the radius as from the center of the driven pulley 1.
  • the roller box 2 On the entry side, the roller box 2 carries an entry bell mouth 11 through which the rod 12 is guided in the direction indicated by the arrow 13. An exit bell mouth 11a is provided on the delivery side.
  • the driven pulley 1 has two passes 14 and 15, of different sizes. If desired, said pulley can be furnished with more passes. But is has been proved in practice that there is no need for a separate pass for each size of rod rolled. Two sizes of passes are adequate to accommodate most sizes of rod.
  • the rollers 7 are also provided with two passes 16 and 17 which, in the embodiment illustrated in FIG. 4, are of the same size.
  • the rollers 7 have a cemented carbide shell 18 (see FIG. 4) to reduce wear. They are mounted in ball bearings 19 and in view of the high rotational speeds of the rollers 7, up to approximately 8,500 rpm, are preferably furnished with mist lubrication and air cooling means (not shown) through spindle 20.
  • the individual rollers 7 are mounted between side plates 30 and 31, the spindles of the individual rollers simultaneously serving as link pins for side plates 30 and 31.
  • This roller assembly is pivotally attached at the delivery side to a side plate 34 by means of a link pin 33 and, with a bolt 35 passing through a slot in side plate 34, is fixed to the underside of the roller box 2.
  • Side plate 34 can be displaced in thehorizontal direction with the aid of adjusting nuts 36 and 37 assembled on a threaded pin 38 welded to side plate 34, and engaging on both sides a tongue 39 welded to the roller box.
  • the roller assembly is attached to an angle lever 40 which is rotatable on a pivot 41. Tensional force is applied to the roller assembly through spring 42 acting on angle lever 40.
  • the spring 42 is adjustable by means of nut 43 located on the turnbuckle 44.
  • the rollers 7 also have a cemented carbide shell. As distinct from the embodiment first described, the rollers 7 and the driven pulley l have only one pass.
  • rollers 7 are mounted in a manner similar to that depicted in FIGS. 1 and 2. But the difference in this case is that guide members 46 are fixed to the spaced ears of members 6 by bolts 47 and are therefore able to move outwards with roller 7 as the leading end of the rod enters the pass. Impact upon the static guide members 46 is thereby obviated.
  • the guide members 46 are also provided with a corresponding pass 48 and are preferably manufactured from cemented carbide steel.
  • the driven pulley 1 comprises a circular disc to which is welded a cylindrical tire.
  • the rollers 7 are mounted in a manner similar to that depicted in FIGS. 1 and 2.
  • the driven pulley 1' is, however, of different fabrication. As depicted in FIG. 9, it incorporates a ring disc 49, L-shaped in cross-section, to which a ring 50 is fixed with screws 51. As a result, an annular groove is produced. Slide members 53 are pivotally mounted off-center in said annular groove by bolts 52. The slide members 53 are preferably of cemented carbide material and furnished with a pass 54. When the driven pulley 1' rotates the slide members 53 swing outwards under the influence of centrifugal force. They are limited in movement in the radial direction by a collar 55 incorporated in the annular groove. The distance between the individual slide members 53 must be kept as small as possible.
  • the apparatus disclosed by the invention is able to handle rod with utmost dependability at substantially higher rates of travel than was possible with prior art means and is practically immune to troubles.
  • the rollers 7 have an outer shell of cemented carbide they have an exceptionally long service life.
  • One of the major advantages of the invention is that most wear parts can be wholly or partly of cemented carbide.
  • the components that are subject to severe abrasive wear are either of a shape or size that prevent the use of cemented carbides.
  • Means in a rod mill for changing the direction of travel of a rapidly moving bendable rod comprising a main driven grooved pulley about which said rod passes, a plurality of rotatable small grooved rollers mounted adjacent said main pulley for engaging and holding said rod against said main pulley as the direction of the moving rod changes, said small rollers being closely adjacent each other and aligned with said main pulley and extending along the periphery of said main pulley for an angular distance substantially equal to the desired angular change in direction of said rod, and guide members spaced radially from the periphery of said main pulley and positioned between said small rollers.
  • each small roller being mounted for rotation on an arm which is pivoted to said support, the pivot of each said arm being angularly displaced with respect to said main pulley from the axis of its said roller.
  • each said arm being at a greater distance from the axis of said main pulley than the axis of its said roller.
  • said small rollers comprised of cemented carbide.
  • the rod engaging periphery of said driven pulley comprised of a plurality of successive guide members pivoted to said pulley which members may swing outwardly under centrifugal force as said pulley rotates and means on said pulley for limiting the outward movement of said guide members.
  • said driven pulley and said rollers having a plurality of passes and a switch on the entry side of said driven pulley for directing the leading end of an oncoming rod to a selected pass.
  • said driven pulley having a plurality of passes and means whereby said oncoming rod can be directed into a selected driven pulley pass.
  • Means in a rolling mill for changing the direction of travel of a rapidly moving bendable product comprising: a main driven grooved pulley about which the product passes; a plurality of rotatable small grooved rollers mounted adjacent to said main pulley for engaging and holding the product against said main pulley as the direction of the moving product changes, said rollers being closely adjacent each other and aligned with said main pulley and extending along the periphery of said main pulley for an angular distance substantially equal to the desired angular change in direction of the product, the mounting for said rollers including a curved support, each of said rollers being rotatably carried on an arm which is pivoted to said support, the pivot of each said arm being angularly displaced with respect to said main pulley from the axis of its said roller, and guide members secured to said support between said rollers, said guide members being spaced radially from the periphery of said main pulley.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Metal Rolling (AREA)
US00247167A 1971-04-29 1972-04-24 Rod entry guide Expired - Lifetime US3777964A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712121126 DE2121126A1 (de) 1971-04-29 1971-04-29 Treibapparat für Draht walz straße

Publications (1)

Publication Number Publication Date
US3777964A true US3777964A (en) 1973-12-11

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US00247167A Expired - Lifetime US3777964A (en) 1971-04-29 1972-04-24 Rod entry guide

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US (1) US3777964A (it)
JP (1) JPS5234816B1 (it)
AU (1) AU465892B2 (it)
BE (1) BE782670A (it)
CA (1) CA964086A (it)
DE (1) DE2121126A1 (it)
FR (1) FR2134600B1 (it)
GB (1) GB1368040A (it)
IT (1) IT984596B (it)
LU (1) LU65260A1 (it)
NL (1) NL7205647A (it)
SE (1) SE368666B (it)
ZA (1) ZA722451B (it)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149664A (en) * 1977-11-11 1979-04-17 United States Steel Corporation Stop means for use in a rod guiding apparatus
US4258834A (en) * 1978-07-12 1981-03-31 Western Gear Corporation Winding system for flexible conduits and cables
US4624400A (en) * 1983-10-21 1986-11-25 Westinghouse Electric Corp. Electromagnetic probe drive apparatus
US4657165A (en) * 1985-09-30 1987-04-14 Giroux D William Mechanical means for preventing the twisting of a fiber optic cable while temporarily storing the same
US4673035A (en) * 1986-01-06 1987-06-16 Gipson Thomas C Method and apparatus for injection of tubing into wells
US4779784A (en) * 1985-09-30 1988-10-25 Giroux D William Mechanical means for preventing the twisting of a fiber optic cable while temporarily storing the same
US5179892A (en) * 1991-03-18 1993-01-19 General Motors Corporation Strap feed assembly with floating back-up wheels
US5669540A (en) * 1995-01-09 1997-09-23 Tokyo Kikai Seisakusho, Ltd. Mechanism for drawing superimposed webs for rotary press
US5765643A (en) * 1996-05-06 1998-06-16 Vita International, Inc. Method and apparatus for injection of tubing into wells
US5796838A (en) * 1996-08-02 1998-08-18 Transcrypt International, Inc. Method and apparatus for performing frequency spectrum inversion
US5934536A (en) * 1998-03-04 1999-08-10 Morgan Construction Company Adjustable turndown apparatus
US5949878A (en) * 1996-06-28 1999-09-07 Transcrypt International, Inc. Method and apparatus for providing voice privacy in electronic communication systems
US6135336A (en) * 1996-11-28 2000-10-24 Nextrom Holding S.A. Capstan arrangement for a cable treatment plant
US6161743A (en) * 1999-06-08 2000-12-19 Wedges/Ledges Ticket dispenser using sharp pins on a driver roller to advance tickets
US6530432B2 (en) * 2001-07-11 2003-03-11 Coiled Tubing Solutions, Inc. Oil well tubing injection system and method
WO2012003105A1 (en) * 2010-07-01 2012-01-05 Siemens Industry, Inc. Turn down apparatus
WO2012006270A1 (en) * 2010-07-06 2012-01-12 Austen Alfred R Method and apparatus for applying uniaxial compression stresses to a moving wire
CN103157662A (zh) * 2013-04-03 2013-06-19 东北特殊钢集团有限责任公司 新型滚动预弯装置
US9248484B2 (en) 2010-07-06 2016-02-02 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109848219B (zh) * 2018-12-26 2024-06-21 重庆龙煜精密铜管有限公司 轧机罩开合滑动机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196656A (en) * 1962-08-06 1965-07-27 Archibald P Johnston Wire conditioning apparatus
US3610498A (en) * 1970-04-15 1971-10-05 Morgan Construction Co Combination centrifugal guide and chain guide
US3680758A (en) * 1971-03-03 1972-08-01 Morgan Construction Co Slant disc entry guide

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE127275C (it) *

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196656A (en) * 1962-08-06 1965-07-27 Archibald P Johnston Wire conditioning apparatus
US3610498A (en) * 1970-04-15 1971-10-05 Morgan Construction Co Combination centrifugal guide and chain guide
US3680758A (en) * 1971-03-03 1972-08-01 Morgan Construction Co Slant disc entry guide

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149664A (en) * 1977-11-11 1979-04-17 United States Steel Corporation Stop means for use in a rod guiding apparatus
US4258834A (en) * 1978-07-12 1981-03-31 Western Gear Corporation Winding system for flexible conduits and cables
US4624400A (en) * 1983-10-21 1986-11-25 Westinghouse Electric Corp. Electromagnetic probe drive apparatus
US4657165A (en) * 1985-09-30 1987-04-14 Giroux D William Mechanical means for preventing the twisting of a fiber optic cable while temporarily storing the same
US4779784A (en) * 1985-09-30 1988-10-25 Giroux D William Mechanical means for preventing the twisting of a fiber optic cable while temporarily storing the same
US4673035A (en) * 1986-01-06 1987-06-16 Gipson Thomas C Method and apparatus for injection of tubing into wells
US5179892A (en) * 1991-03-18 1993-01-19 General Motors Corporation Strap feed assembly with floating back-up wheels
US5669540A (en) * 1995-01-09 1997-09-23 Tokyo Kikai Seisakusho, Ltd. Mechanism for drawing superimposed webs for rotary press
US5765643A (en) * 1996-05-06 1998-06-16 Vita International, Inc. Method and apparatus for injection of tubing into wells
EP0858547A4 (en) * 1996-05-06 2002-07-24 Vita International Inc METHOD AND APPARATUS FOR INTRODUCING A PRODUCTION TUBE IN A WELL
EP0858547A1 (en) * 1996-05-06 1998-08-19 Vita International, Inc. Method and apparatus for injection of tubing into wells
US5949878A (en) * 1996-06-28 1999-09-07 Transcrypt International, Inc. Method and apparatus for providing voice privacy in electronic communication systems
US5796838A (en) * 1996-08-02 1998-08-18 Transcrypt International, Inc. Method and apparatus for performing frequency spectrum inversion
US6135336A (en) * 1996-11-28 2000-10-24 Nextrom Holding S.A. Capstan arrangement for a cable treatment plant
US5934536A (en) * 1998-03-04 1999-08-10 Morgan Construction Company Adjustable turndown apparatus
US6161743A (en) * 1999-06-08 2000-12-19 Wedges/Ledges Ticket dispenser using sharp pins on a driver roller to advance tickets
US6530432B2 (en) * 2001-07-11 2003-03-11 Coiled Tubing Solutions, Inc. Oil well tubing injection system and method
WO2012003105A1 (en) * 2010-07-01 2012-01-05 Siemens Industry, Inc. Turn down apparatus
US8707748B2 (en) 2010-07-01 2014-04-29 Siemens Industry, Inc. Turn down apparatus
WO2012006270A1 (en) * 2010-07-06 2012-01-12 Austen Alfred R Method and apparatus for applying uniaxial compression stresses to a moving wire
US8534108B2 (en) 2010-07-06 2013-09-17 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
US8959970B2 (en) 2010-07-06 2015-02-24 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
US9248484B2 (en) 2010-07-06 2016-02-02 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
CN103157662A (zh) * 2013-04-03 2013-06-19 东北特殊钢集团有限责任公司 新型滚动预弯装置

Also Published As

Publication number Publication date
LU65260A1 (it) 1972-11-08
ZA722451B (en) 1973-03-28
JPS5234816B1 (it) 1977-09-06
SE368666B (it) 1974-07-15
AU4125572A (en) 1973-10-25
GB1368040A (en) 1974-09-25
BE782670A (fr) 1972-08-16
FR2134600A1 (it) 1972-12-08
IT984596B (it) 1974-11-20
DE2121126A1 (de) 1972-11-16
FR2134600B1 (it) 1977-11-18
CA964086A (en) 1975-03-11
NL7205647A (it) 1972-10-31
AU465892B2 (en) 1973-10-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HYDRO RENE LUC, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:POREL, LOUIS C.;REEL/FRAME:005178/0164

Effective date: 19890717