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DE1777440A1 - LATHE - Google Patents

LATHE

Info

Publication number
DE1777440A1
DE1777440A1 DE19671777440 DE1777440A DE1777440A1 DE 1777440 A1 DE1777440 A1 DE 1777440A1 DE 19671777440 DE19671777440 DE 19671777440 DE 1777440 A DE1777440 A DE 1777440A DE 1777440 A1 DE1777440 A1 DE 1777440A1
Authority
DE
Germany
Prior art keywords
spindle
axis
lathe
headstock
rotatably mounted
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.)
Pending
Application number
DE19671777440
Other languages
German (de)
Inventor
Leon Fayolle
James Moffat Hutchson
Charles Henri Kahn
David Theodore Nels Williamson
Kenneth Charles Wilson
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.)
Molins Machine Co Ltd
Original Assignee
Molins Machine Co Ltd
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 Molins Machine Co Ltd filed Critical Molins Machine Co Ltd
Publication of DE1777440A1 publication Critical patent/DE1777440A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
    • B23Q39/021—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like
    • B23Q39/022—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder
    • B23Q39/024—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder consecutive working of toolheads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B11/00—Automatic or semi-automatic turning-machines incorporating equipment for performing other working procedures, e.g. slotting, milling, rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q2039/008—Machines of the lathe type
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45141—Turret lathe
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49376—Select two machining types, milling or turning, complete machining with one tool
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50047—Positioning, indexing
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50249—Tool, probe, pen changer
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50293—Radial setting of tool

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Machine Tool Units (AREA)

Description

PalwitanwW··PalwitanwW ·· Dr. Ing. H. N*g*ndankDr. Ing. H. N * g * ndank

Dipl. Ing. H. Haudc - Dipl. Phy·. W-Schmitz Dipl. Ing. H. Haudc - Dipl. Phy ·. W- Schmitz

Dipl. Ing. E. Graelf»- DIpI. Ing. W. Wehn.rt Dipl. Ing. E. Graelf »- DIpI. Ing.W. Wehn.rt

8 München 2, Moiartstraß· 258 Munich 2, Moiartstrasse 25

Τ·Ι·«οη MΤ · Ι · «οη M

1777U01777U0

Molins Machine Co.Ltd.Molins Machine Co. Ltd.

2, Evelyn Street2, Evelyn Street

Deptford, London, S.E. 8, EnglandDeptford, London, S.E. 8, England

27. Juni 1973 Akte M-2566June 27, 1973 File M-2566

Ausscheidungsanmeldung III zu P 16 o2 883.4Elimination registration III for P 16 O2 883.4

DrehmaschineLathe

Die Erfindung betrifft eine Drehmaschine, insbesondere mit nume-The invention relates to a lathe, in particular with nume-

I rischer Steuerung, mit einer während des Drehens sowohl in RichtungIrish controls, with one while turning both in the direction

der Spindelachse als auch in einer zu dieser senkrechten Ebene bewegbar gelagerten Spindel, die exzentrisch in einem im Spindelstock drehbar gelagerten, im Querschnitt kreisförmigen Glied angeordnet ist, wobei die Einstellung der Spindel in eine gewünschte Lage in der zur Spindelachse senkrechten Ebene durch eine Drehbewegung des Gliedes und eine zur Drehachse des Gliedes radiale Bewegung der Spindel erfolgt.the spindle axis as well as in a spindle mounted movably to this perpendicular plane, which is eccentric in a spindle in the headstock rotatably mounted, circular in cross-section member is arranged, wherein the adjustment of the spindle in a desired Position in the plane perpendicular to the spindle axis through a rotary movement of the member and a radial movement of the spindle to the axis of rotation of the member takes place.

Bei Drehmaschinen mit mehreren während des Drehens vorrichtungsfest gehaltenen Drehstählen und Stirnwerkzeugen ist es beispieleweise erforderlich, die Spindel mit dem Werkstück genau mit dem jeweils benötigten Werkzeug auszurichten. Bei einer bekannten Drehmaschine der eingangs genannten Art ist die Spindel zu diesem Zweck exzentrisch in einer ersten zylindrischen Muffe angeordnet, die ihrerseits exzentrisch und drehbar in einer zweiten, drehbar In the case of lathes with several turning steels and face tools that are held fixed to the device during turning, it is necessary, for example, to align the spindle with the workpiece precisely with the tool required in each case. In a known lathe of the type mentioned at the outset, the spindle is arranged eccentrically for this purpose in a first cylindrical sleeve, which in turn is eccentric and rotatable in a second, rotatable

40 9 8 86/000540 9 8 86/0005

~2~ 1777U0~ 2 ~ 1777U0

im Spindelstock angeordneten Muffe gelagert ist. Durch relative Drehung der ersten und zweiten zylindrischen Muffe, die jede mit einem selbständigen Antrieb ausgestattet sind, kann die Spindel in jede beliebige einer unendlichen Zahl von Stellungen innerhalb , der zur Spindelachse senkrechten Ebene gebracht werden (australi- ; sehe Patentschrift 66/932o). Diese Anordnung erfordert bei der praktischen Durchführung der jeweils gewünschten Spindeleinstellung, insbesondere bei numerischer Steuerung, einen erheblichen rechnerischen Aufwand, um die erforderlichen relativen Drehbewegungen beider Muffen zu bestimmen und entsprechend zu steuern. Insbesondere erweist sich die Tatsache, daß eine Radialbewegung der Spindelis mounted in the headstock arranged sleeve. By relative rotation of the first and second cylindrical sleeves, each with are equipped with an independent drive, the spindle can be in any of an infinite number of positions within, the plane perpendicular to the spindle axis (australia; see patent 66 / 932o). This arrangement requires practical Carrying out the required spindle setting, especially in the case of numerical control, is a considerable arithmetic Effort to determine the required relative rotary movements of both sleeves and to control them accordingly. In particular proves the fact that a radial movement of the spindle

gegenüber der zweiten Muffe nur bei genau aufeinander abgestimmten1 Winkelgeschwindigkeiten beider Muffen erreicht werden kann,als für die numerische Steuerung wenig geeignet.can be achieved with respect to the second sleeve only at precisely coordinated 1 angular velocities of both sleeves as unsuitable for numerical control.

Aufgabe der Erfindung ist es daher, bei einer Drehmaschine der eingangs genannten Art die Quereinstellung der Spindel in einer vereinfachten und der numerischen Steuerung besser angepaßten Weise zu ermöglichen.The object of the invention is therefore, in a lathe of the type mentioned, the transverse adjustment of the spindle in a to allow simplified and numerical control better adapted way.

Nach der Erfindung ist zu diesem Zweck die Spindel an dem im Spindelstock drehbar gelagerten Glied radial verschiebbar angeordnet. According to the invention, the spindle is arranged radially displaceably on the member rotatably mounted in the headstock for this purpose.

Auf diese Weise wird vermieden, daß eine Radialbewegung der Spindel durch die in ihren Winkelgeschwindigkeiten aufeinander abgestimmten Drehungen zweier Muffen erzeugt werden muß, wie dies bei In this way it is avoided that a radial movement of the spindle must be generated by the rotations of two sleeves, which are coordinated in their angular speeds, as is the case with

-3--3-

409886/0005409886/0005

der beKannten Drehmaschine der Fall ist. Die gewünschte Spindeleinstellung wird vielmehr durch die Kombination einer einfach zu steuernden Radialverschiebung auf dem drehbaren Glied mit einer ebenfalls einfach zu steuernden Drehbewegung dieses Gliedes herbei geführt.the known lathe is the case. The desired spindle setting Rather, by combining an easy-to-control radial displacement on the rotatable member with a also easily controlled rotary movement of this member brought about.

Zweckmäßig wird die Spindel in einem entlang eines Durchmessers des Gliedes bewegbaren Schlitten gelagert. Vorzugsweise ist dabei zur radialen Verschiebung des Schlittens gegenüber dem Glied ein mit seiner Achse radial zur Gliedachse angeordneter Hydraulikzylinder vorgesehen.The spindle is expediently mounted in a slide which can be moved along a diameter of the link. Preferably is there for the radial displacement of the slide relative to the link, a hydraulic cylinder arranged with its axis radially to the link axis intended.

Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnungen beschrieben, und zwar stellen dar:An embodiment of the invention is described with reference to the drawings, namely show:

Fig. 1 eine schematische Seitenansicht einer Drehmaschine nach derFig. 1 is a schematic side view of a lathe according to

Erfindung,
Fig. 2 eine Ansicht in Richtung der Pfeile VIII-VIII in Fig. 1Invention,
FIG. 2 is a view in the direction of arrows VIII-VIII in FIG. 1

und
Fig. 3 einen Schnitt entlang der Linie IX-IX in Fig. 1.and
FIG. 3 shows a section along the line IX-IX in FIG. 1.

Wie aus Fig. 1 ersichtlich, besteht eine Drehmaschine nach der Erfindung aus einem zweiteiligen Maschinenrahmen, wobei ein Teil (61), der der Spindelstock ist, eine Spindelhülse (62) trägt und der andere Teil (63) als Werkzeugträger ausgebildet ist, der sechs Drehstahlscheiben (61,65,66,67,68 und 69) sowie in zwei konzentrischen Kreisen angeordnete Bohrwerkzeuge (7o,71) trägt As can be seen from Fig. 1, a lathe according to the invention consists of a two-part machine frame, one part (61), which is the headstock, carries a spindle sleeve (62) and the other part (63) is designed as a tool carrier, the six Turning steel disks (61,65,66,67,68 and 69) as well as drilling tools (7o, 71) arranged in two concentric circles

409886/0005409886/0005

J (s. Fig. 2). Die Spindelhülse (62) nimmt eine entlang ihrer Längs-J (see Figure 2). The spindle sleeve (62) takes one along its longitudinal

achse verschiebbare Spindel (72) mit einem Futter (73) zum Festhalten eines Werkstücks (7Ό auf. Wie aus Fig. 3 zu ersehen, ist die Spindelhülse (62) auf einem Schlitten (75) angeordnet, der mittels eines hydraulischen Zylinders (76) in einer Platte (77) verschiebbar ist, in der der Schlitten durch hydrostatische Lager (78) gelagert ist. Die Platte (77) ist innerhalb des Spindelstocks (61) mittels hydrostatischer Lager (79) drehbar gelagert. Eine Drehung der Platte (77) ändert die Neigung des Schlittens (75) und damit auch die Neigung der Vorschubebene. Ein nicht dargestellt ter Schaltmechanismus dient zum Drehen der Platte (77) derart, daß,axially displaceable spindle (72) with a chuck (73) for holding a workpiece (7Ό. As can be seen from Fig. 3, is the spindle sleeve (62) is arranged on a slide (75) which is mounted in a plate (77) by means of a hydraulic cylinder (76) is displaceable, in which the carriage is supported by hydrostatic bearings (78). The plate (77) is inside the headstock (61) rotatably mounted by means of hydrostatic bearings (79). One rotation of the plate (77) changes the inclination of the carriage (75) and thus also the inclination of the feed plane. One not shown ter switching mechanism is used to rotate the plate (77) such that,

das Werkstück (7H) einer der Drehstahlscheiben (64 - 69) zugeführt!the workpiece (7H) is fed to one of the turning steel disks (64 - 69)!

ι werden kann. !ι can be. !

-5--5-

409886/0005409886/0005

Claims (3)

PatentansprücheClaims 1Λ Drehmaschine, insbesondere mit numerischer Steuerung, mit einer während des Drehens sowohl in Richtung der Spindelachse als auch in einer zu dieser senkrechten Ebene bewegbar gelagerten Spindel, die exzentrisch in einem im Spindelstock drehbar gelagerten, im Querschnitt kreisförmigen Glied angeordnet ist, wobei die Einstellung der Spindel in eine gewünschte Lage in der zur Spindelachse senkrechten Ebene durch eine Drehbewegung des Gliedes und eine zur Drehachse des Gliedes radiale Bewegung der Spindel erfolgt, dadurch gekennzeichnet, daß die Spindel (72) an dem im Spindelstock drehbar gelagerten Glied (77) radial verschiebbar angeordnet ist.1Λ lathe, especially with numerical control, with a during rotation, both in the direction of the spindle axis and in a plane perpendicular to this Spindle which is arranged eccentrically in a member which is rotatably mounted in the headstock and has a circular cross-section, the setting of the spindle in a desired position in the plane perpendicular to the spindle axis by means of a rotary movement of the member and a radial movement of the spindle to the axis of rotation of the member takes place, characterized in that the spindle (72) is arranged on the member (77) rotatably mounted in the headstock so as to be radially displaceable. 2. Drehmaschine nach Anspruch I1 dadurch gekennzeichnet, daß die Spindel (72) in einem entlang eines Durchmessers dee Gliedes (77) bewegbaren Schlitten (75) gelagert ist. .2. Lathe according to claim I 1, characterized in that the spindle (72) is mounted in a slide (75) movable along a diameter of the member (77). . 3. Drehmaschine nach Anspruch 2, dadurch gekennzeichnet, daß zur radialen Verschiebung des Schlittens (75) gegenüber dem Glied3. Lathe according to claim 2, characterized in that for the radial displacement of the carriage (75) with respect to the member 409886/0005409886/0005 1777U01777U0 (77) ein mit seiner Achse radial zur Gliedachse angeordneter ! Hydraulikzylinder (76) vorgesehen ist. I(77) one arranged with its axis radially to the link axis! Hydraulic cylinder (76) is provided. I. 409816/0005409816/0005
DE19671777440 1966-01-28 1967-01-26 LATHE Pending DE1777440A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB4848966A GB1186172A (en) 1966-01-28 1966-01-28 Improvements relating to a Multi-Tool Lathe.
GB399766 1966-01-28
GB484566 1966-02-03
GB2714866 1966-06-17
GB3172266 1966-07-14

Publications (1)

Publication Number Publication Date
DE1777440A1 true DE1777440A1 (en) 1975-02-06

Family

ID=27515736

Family Applications (4)

Application Number Title Priority Date Filing Date
DE19671602883 Pending DE1602883A1 (en) 1966-01-28 1967-01-26 Multi-tool lathe
DE19671777438 Pending DE1777438A1 (en) 1966-01-28 1967-01-26 LATHE
DE19671777440 Pending DE1777440A1 (en) 1966-01-28 1967-01-26 LATHE
DE19671777439 Pending DE1777439A1 (en) 1966-01-28 1967-01-26 MULTI-PURPOSE MACHINE TOOL

Family Applications Before (2)

Application Number Title Priority Date Filing Date
DE19671602883 Pending DE1602883A1 (en) 1966-01-28 1967-01-26 Multi-tool lathe
DE19671777438 Pending DE1777438A1 (en) 1966-01-28 1967-01-26 LATHE

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE19671777439 Pending DE1777439A1 (en) 1966-01-28 1967-01-26 MULTI-PURPOSE MACHINE TOOL

Country Status (7)

Country Link
AT (3) AT302767B (en)
BE (1) BE693300A (en)
DE (4) DE1602883A1 (en)
FR (1) FR1509471A (en)
GB (1) GB1186172A (en)
NL (1) NL6701272A (en)
SE (1) SE354592B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514069A1 (en) * 1984-04-27 1985-10-31 Kabushiki Kaisha Miyano Tekkosho, Ueda, Nagano TWO-SPINDLE MACHINE TOOL
DE3435384A1 (en) * 1984-09-27 1986-04-03 Heyligenstaedt & Co, Werkzeugmaschinenfabrik Gmbh, 6300 Giessen Lathe

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1952050C3 (en) * 1969-10-16 1983-12-08 Index-Werke Kg Hahn & Tessky, 7300 Esslingen Automatic turret lathe
JPS5826729Y2 (en) * 1979-07-02 1983-06-09 株式会社池貝 Machine tool turret turret
DE3216892A1 (en) * 1982-05-06 1983-11-10 Index-Werke Kg Hahn & Tessky, 7300 Esslingen MULTI-SPINDLE REVOLVER TURNING MACHINE
DE8316943U1 (en) * 1983-06-09 1985-02-21 G. Boley GmbH & Co, Werkzeugmaschinenfabrik, 7300 Esslingen TWO-SPINDLE LATHE
DE8700343U1 (en) * 1987-01-08 1988-05-11 Mauser-Werke Oberndorf Gmbh, 78727 Oberndorf Lathe
DE3832975C1 (en) * 1988-09-29 1990-02-22 Gildemeister Italiana S.P.A., Brembate Di Sopra, Bergamo, It
DE3834342A1 (en) * 1988-10-08 1990-04-12 Heyligenstaedt Gmbh & Co Kg Lathe
SE8803729L (en) * 1988-10-19 1990-04-20 Fixturteknik Ab SET TO USE A FRAME WITH QUIET TOOLS AND QUESTIONS BEFORE APPLYING THE SET
DE9105493U1 (en) * 1991-05-03 1991-06-20 Schmitz u. Söhne GmbH & Co KG, 5757 Wickede Device for locking at least one pivotable actuating lever in a pivoting position
AT408855B (en) * 2000-02-18 2002-03-25 Miba Gleitlager Ag DEVICE FOR MACHINING THE BEARING HALF SHELLS OF SLIDING BEARINGS
CN110947982A (en) * 2019-12-20 2020-04-03 河南中乌化工有限公司 Improved structure of numerical control machine tool spindle
CN111958263B (en) * 2020-09-10 2024-12-20 吉林省金沙数控机床股份有限公司 A disc parts processing production line
CN112122969A (en) * 2020-09-30 2020-12-25 中国航空工业标准件制造有限责任公司 Bolt head milling tool
CN115194528B (en) * 2022-06-22 2023-12-26 山东润龙精密机床有限公司 Numerical control boring machine with biaxial, two stations and automatic centering function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514069A1 (en) * 1984-04-27 1985-10-31 Kabushiki Kaisha Miyano Tekkosho, Ueda, Nagano TWO-SPINDLE MACHINE TOOL
DE3435384A1 (en) * 1984-09-27 1986-04-03 Heyligenstaedt & Co, Werkzeugmaschinenfabrik Gmbh, 6300 Giessen Lathe

Also Published As

Publication number Publication date
NL6701272A (en) 1967-07-31
GB1186172A (en) 1970-04-02
BE693300A (en) 1967-07-03
AT303490B (en) 1972-11-27
DE1777438A1 (en) 1975-02-06
DE1777439A1 (en) 1975-02-06
DE1602883A1 (en) 1970-04-09
AT302767B (en) 1972-10-25
AT282289B (en) 1970-06-25
SE354592B (en) 1973-03-19
FR1509471A (en) 1968-01-12

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