EP0000793B1 - Transportable mast, especially for directional broadcast installations - Google Patents

Transportable mast, especially for directional broadcast installations Download PDF

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Publication number
EP0000793B1
EP0000793B1 EP78200068A EP78200068A EP0000793B1 EP 0000793 B1 EP0000793 B1 EP 0000793B1 EP 78200068 A EP78200068 A EP 78200068A EP 78200068 A EP78200068 A EP 78200068A EP 0000793 B1 EP0000793 B1 EP 0000793B1
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EP
European Patent Office
Prior art keywords
mast
pawl
raising
friction
mast tube
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
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EP78200068A
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German (de)
French (fr)
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EP0000793A1 (en
Inventor
Robert Graf
René Meier
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BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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Publication date
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Publication of EP0000793A1 publication Critical patent/EP0000793A1/en
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Publication of EP0000793B1 publication Critical patent/EP0000793B1/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/34Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/1235Collapsible supports; Means for erecting a rigid antenna

Definitions

  • the present invention relates to a portable mast, in particular for directional radio systems, with a tripod and rotatable tripod head, a mast tube lifting and lowering device accommodated in the tripod head, having friction means, pluggable and braceable mast tube elements and guy elements for fixing the mast at the installation site.
  • Known transportable radio masts mainly suffer from the fact that their tripod-mounted lifting device, by means of which the individual mast tube elements are lifted one after the other in order to be able to attach the following mast tube element, are complicated and also prone to failure.
  • the lifting device usually has a toothed drive with a toothed rack and pinion, the function of which is impaired when contaminated.
  • This disadvantage can play a decisive role, particularly in military applications.
  • a device for the present purpose which uses friction means in the form of three tiltable friction wheel pairs for lifting and lowering a mast.
  • friction wheels themselves work reliably and reliably, three bevel gear pairs are required for their common drive, which complicate and make the equipment more expensive and also require a certain amount of maintenance, which should be avoided in military applications.
  • a mast lifting and lowering device which has conical friction sleeve pairs for lifting, lowering and holding the mast, each consisting of an inner and an outer sleeve and in which, depending on the direction of actuation of the outer sleeve the inner sleeve releases or clamps the mast, thus creating a positive connection in the desired direction to raise or lower the mast.
  • this device in particular the conical sleeves, require high machining accuracy with tight tolerances and correspondingly high manufacturing costs for proper functioning.
  • Clamping hoists are also generally known, i.a. one from DE-B-1 037 098, in which a lifting or lowering movement can be carried out by alternately tilting and releasing clamping plates enclosing a mast or a stamp in cooperation with a holding plate. Clamping hoists of this type are particularly widespread in the design as wagons.
  • such a clamp hoist is for the present purpose, i.e. not suitable for lifting and lowering masts, the top of which carries radio devices weighing 50 and more kg.
  • a hoist must be modified accordingly, e.g. in such a way that lifting and lowering can be carried out without being affected by the process of attaching or detaching the individual mast tube elements when the system is being set up or removed.
  • Fig. 1 denote the tripod, 2 the mast tube, 3 guy ropes, which lead via pulleys 5, 6, 7, 8, 9 to a rope tensioner 10 of known type with which the ropes 3 can be tensioned individually or together .
  • 11, 12 and 13 denote reels for winding the ropes 3.
  • ropes 4 are attached to the anchoring points 5, 6 and 7 and tensioned by hand.
  • the stand 1 shown in FIG. 2 has three legs 14 which are adjustable in length, the adjustment mechanism of which is described below.
  • the tripod head 16 is rotatably mounted on a common head plate 15 in order to be able to rotate the mast 2, of which the uppermost mast tube element 17 is shown in its starting position in FIG. 2, in the desired azimuth direction.
  • a taper pin 18 and two shackle plates 19 for fastening the guy ropes 3 and 4.
  • Articulated claws 20 ensure that the tripod legs 14 stand securely.
  • Fig. 3 shows the tripod head 16 with the lifting and lowering device housed therein for the mast tube 2 and with the mast tube element 17.
  • a base plate 21 is rotatably supported, with a plastic disc 22 the vertical axial thrust and a plastic sleeve 23 absorbs the horizontal forces.
  • the base plate 21 there is an annular groove 24 in which there are sliding blocks 25 with an internal thread which, in conjunction with screws 26 which project upwards through the head plate 15, enable the base plate 21 to be clamped.
  • a washer 27 attached to the screw end prevents the screw 26 from being completely unscrewed.
  • the upper pawl 28 serves to carry the mast tube, the middle pawl 29 for lowering and the lower pawl 30 for lifting the mast tube 17. Accordingly, these pawls are referred to as support pawls, countersunk pawls or lifting pawls. These pawls are shown individually in the plan and side view in FIGS. 5 to 10.
  • the carrying pawl 28 has a lifting thumb 32 which can be pivoted about a bolt 31 and has a threaded bore 33 into which a lever tube for actuating the lifting thumb 32 can be screwed.
  • the support pawl 28 On the side opposite the lifting thumb 32, the support pawl 28 has two tabs 34 (see FIG. 6) with which the support pawl is supported on a bolt 36 mounted in the housing 35.
  • the countersunk pawl 29 shown in detail in FIGS. 7 and 8 carries on one side a roller 41 cooperating with the lifting thumb 32 and on the opposite side two setscrews 42 with nuts 43 for fixing the setscrews 42, which serve as pawl pivot points.
  • the lifting pawl 30 shown in detail in FIGS. 9 and 10 is essentially mirror-inverted, like the lowering pawl 29, but additionally has a straight cutting edge 45 on the side opposite its roller 44.
  • the pawls 28, 29 and 30 are provided with a bore 46, 47 and 48 which is inclined to the pawl plane by a few degrees, which enclose the mast tube and allow tilting and self-locking on the mast tube in a known manner.
  • the lifting pawl 30 also has two setscrews 49 and nuts 50 for fixing them, these setscrews also serving as pawl pivot points.
  • a lifting thumb 52 pivotably mounted on a bolt 51 with a threaded bore 53 which is intended to receive a lever tube.
  • the two lever tubes 54 and 55 for the lifting thumbs 32 and 52 which are shown schematically in FIGS. 11 and 12, can be introduced through an opening in the tripod head 16, which can be closed by a door 56.
  • a catch lever 61 On the side opposite the lifting thumb is a catch lever 61 which is pivotally mounted about the bolt 36. Its lower part is designed as a nose 62 and in the middle part it has a series of locking teeth 63 which are intended to come into engagement with the cutting edge 45 of the lifting pawl 30.
  • a helical compression spring 64 In the wall of the housing 35 there is a helical compression spring 64 which is held by a screw 65. The spring 64 presses the nose 62 of the catch lever 61 against the outer surface of the mast tube element 17.
  • FIGS. 11 and 12 The mode of operation of the lifting and lowering device and the catch lever can be seen from FIGS. 11 and 12.
  • the lifting thumb 53 first presses the roller 44 and thus the lifting pawl 30 upwards, whereby at the same time the force transmitted from the spring 58 to the lowering pawl 29 pivots it clockwise.
  • This movement is transmitted via the roller 41 and the lifting thumb 32 to the pawl 28, which also rotates clockwise and thereby releases the mast tube element 17, which, when the lifting tube 55 is pressed down further, by the lifting pawl 30, which has meanwhile clamped the mast tube element 17 , pushes up.
  • the lever tube 55 is subsequently pulled up, this process proceeds in reverse, with the pawl 28 first taking effect and then the lifting pawl releasing the mast tube element.
  • the lever tube 54 is pivoted downward, as a result of which the lowering pawl 29 first comes into clamping engagement with the mast tube element 17 and then the lifting pawl 30 and the supporting pawl 28 are released, so that the mast is lowered when the lever tube 54 is pushed further down.
  • the plate springs 38 and the helical compression springs 39, 57 and 58 serve to clamp the pawls against one another and to hold them in the position required for the function.
  • the two setscrews 42 and 49 with the associated nuts 43 and 50 are used to adjust the mutual position of the pawls, in particular to adapt to the mast tube diameter to compensate for diameter tolerances.
  • the catch lever 61 has the task of holding the lifting pawl 30 in place as shown in FIG. 12 if the subsequent mast tube element 67 is not connected to the latter in an integrity manner, ie, with its end face butting against the end face 66 of the upper tube element.
  • the spring 64 (FIG. 3) presses the catch lever into the position shown in FIG. 12, the cutting edge 45 (FIG. 3) of the lifting pawl 30 engages in one of the locking teeth 63.
  • the lifting pawl If the lifting pawl is actuated in this position via the lifting thumb 52, it swings up and down empty until the tubular elements are properly connected, i.e. until their adjacent end faces abut without a gap. This prevents incorrect assembly of the mast tube and prevents the bottom mast tube element from being lifted out of the tripod head if inattentive.
  • FIG. 13 shows the connecting elements for assembling the mast tube elements. They consist of a tie rod 68 with a collar 69 and a screw thread 73 which interacts with the internal thread of a clamping cone 74.
  • the tie rod the head of which has a slot for receiving a corresponding key, is supported with its collar 69 on the support ring 70 fastened in the mast tube element and is secured in the axial direction by a cover 71 fastened by means of screws 72.
  • the alignment of the mast tube elements 17 and 67 to be connected to one another is ensured by an expansion sleeve 75 connected to the tube element 67, which is cylindrical in the lower part and has an inner cone in the upper part, into which the clamping cone 74 is inserted.
  • the clamping sleeve 75 has a longitudinal slot 76, into which a nose of the clamping cone 74, which acts as an anti-rotation lock and engages, engages.
  • FIG. 20 shows a leg 14 of the tripod and the adjustment mechanism for adjusting the leg length. It carries a claw 21 at its lower end, which is pivotably mounted on a displaceable tube 78 and ensures that the tripod stands securely.
  • This tube 78 is provided in its upper part with a series of transverse bores for receiving a bolt 80, the ends of which protrude on both sides are displaceable in the axial direction of the tripod leg in two diametrically opposed longitudinal slots of an outer guide tube 79.
  • a protective tube 81 connected to a knurled nut 82 is provided above the bolt 80 and a knurled nut 83 is provided below the bolt 80.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Support Of Aerials (AREA)
  • Earth Drilling (AREA)

Description

Die vorliegende Erfindung betrifft einen transportablen Mast, insbesondere für Richtfunkanlagen, mit einem Stativ und drehbarem Stativkopf, einer im Stativkopf untergebrachten, Friktionsmittel aufweisenden Mastrohrhebe- und -senkvorrichtung, zusammensteck- und verspannbaren Mastrohrelementen und Abspannelementen für die Fixierung des Mastes am Aufstellort.The present invention relates to a portable mast, in particular for directional radio systems, with a tripod and rotatable tripod head, a mast tube lifting and lowering device accommodated in the tripod head, having friction means, pluggable and braceable mast tube elements and guy elements for fixing the mast at the installation site.

Bekannte transportable Richtfunkmaste kranken hauptsächlich daran, dass ihre Stativkopf untergebrachte Hebevorrichtung, mittels deren die einzelnen Mastrohrelemente nacheinander gehoben werden, um das folgende Mastrohrelement anfügen zu können, kompliziert und auch störanfällig sind.Known transportable radio masts mainly suffer from the fact that their tripod-mounted lifting device, by means of which the individual mast tube elements are lifted one after the other in order to be able to attach the following mast tube element, are complicated and also prone to failure.

Dies rührt daher, dass die Hevevorrichtung gewöhnlich einen Zahntrieb mit Zahnstange und Ritzel aufweist, dessen Funktion bei Verschmutzung beeinträchtigt wird. Besonders bei militärischen Anwendungen kann dieser Nachteil eine ausschlaggebende Rolle spielen.This is due to the fact that the lifting device usually has a toothed drive with a toothed rack and pinion, the function of which is impaired when contaminated. This disadvantage can play a decisive role, particularly in military applications.

Aus der FR-A-2 263 975 ist ferner eine Einrichtung für den vorliegenden Zweck bekannt, die Friktionsmittel in Form von drei kippbaren Reibradpaaren zum Heben und Senken eines Mastes benutzt. Diese Reibräder selbst arbeiten zwar zuverlässig störungssicher, doch sind zu ihrem gemeinsamen Antrieb drei Kegelradpaare erforderlich, die die Einrichtung komplizieren und verteuern und auch einen gewissen Wartungsaufwand erfordern, der bei militärischen Anwendungen vermieden werden sollte.From FR-A-2 263 975 a device for the present purpose is also known, which uses friction means in the form of three tiltable friction wheel pairs for lifting and lowering a mast. Although these friction wheels themselves work reliably and reliably, three bevel gear pairs are required for their common drive, which complicate and make the equipment more expensive and also require a certain amount of maintenance, which should be avoided in military applications.

Aus der US-A-3 320 703 ist ferner eine Masthebe- und senkvorrichtung bekannt, die für das Heben, Senken und Halten des Mastes konische Reibhülsempaare besitzt, die aus je einer Innen-und einer Aussenhülse bestehen und bei denen je nach Betätigungsrichtung der Aussenhülse die Innenhülse den Mast freigibt oder klemmt und damit eine kraftschlüssige Verbindung in der gewünschten Richtung zum Heben oder Senken des Mastes bewirkt.From US-A-3 320 703 a mast lifting and lowering device is also known which has conical friction sleeve pairs for lifting, lowering and holding the mast, each consisting of an inner and an outer sleeve and in which, depending on the direction of actuation of the outer sleeve the inner sleeve releases or clamps the mast, thus creating a positive connection in the desired direction to raise or lower the mast.

Die Einzelteile dieser Vorrichtung, insbesondere die konischen Hülsen, verlangen für eine einwandfreie Funktion hohe Bearbeitungsgenauigkeit mit engen Toleranzen und dementsprechend hohen Fertigungskosten.The individual parts of this device, in particular the conical sleeves, require high machining accuracy with tight tolerances and correspondingly high manufacturing costs for proper functioning.

Es sind ferner Klemmhubwerke allgemein bekannt, u.a. eines aus der DE-B-1 037 098, bei denen durch abwechselndes Kippen und Lösen von einen Mast oder einen Stempel umschliessenden Klemmplatten im Zusammenwirken mit einer Halteplatte eine Hub- oder Senkbewegung ausgeführt werden kann. Solche Klemmhubwerke sind besonders in der Ausführung als Wagengeber weit verbreitet.Clamping hoists are also generally known, i.a. one from DE-B-1 037 098, in which a lifting or lowering movement can be carried out by alternately tilting and releasing clamping plates enclosing a mast or a stamp in cooperation with a holding plate. Clamping hoists of this type are particularly widespread in the design as wagons.

In dieser einfachen Form ist ein solches Klemmhubwerk für den vorliegenden Zweck, d.h. zum Heben und Senken von Masten, deren Spitze Funkgeräte im Gewicht von 50 und mehr kg trägt, nicht geeignet. Für diesen Zweck muss ein solches Hubwerk daher entsprechend modifiziert werden, u.a. in der Weise, dass ein Heben und Senken ohne Beeinträchtigung durch den Vorgang des ansetzens oder Abnehmens der einzelnen Mastrohrelemente beim Aufbau bzw. Abbau der Anlage ausgeführt werden kann.In this simple form, such a clamp hoist is for the present purpose, i.e. not suitable for lifting and lowering masts, the top of which carries radio devices weighing 50 and more kg. For this purpose, such a hoist must be modified accordingly, e.g. in such a way that lifting and lowering can be carried out without being affected by the process of attaching or detaching the individual mast tube elements when the system is being set up or removed.

Diese Modifikationen bilden den Gegenstand der im folgenden beschriebenen und im kennzeichnenden Teil des Patentanspruchs 1 definierten Erfindung, mit der auch die Nachteile der oben erwähnten, bekannten Bauarten vermieden werden sollen.These modifications form the subject of the invention described below and defined in the characterizing part of patent claim 1, with which the disadvantages of the known types mentioned above are also to be avoided.

In der Zeichnung, auf die in der folgenden Beschreibung Bezug genommen wird, stellen dar:

  • Fig. 1 einen erfindungsgemässen Mast, im Gelände betriebsfertig aufgebaut,
  • Fig. 2 das Stativ des Mastes nach Fig. 1 mit dem obersten Mastrohrelement, dessen Spitze einen Kegelzapfen zur Aufnahme des Richtfunkgerätes aufweist,
  • Fig.3 den Stativkopf im Schnitt mit der Hebe-und Senkvorrichtung für das Mastrohr,
  • Fig.4 den Stativkopf im Grundriss,
  • Fig. bis 10 die drei Friktionsklinken, jeweils im Grund- und Seitenriss,
  • Fig. 11 und 12 Funktionsschemata der Hebe-und Senkvorrichtung,
  • Fig. 13 die Verbindungselemente des Mastrohres,
  • Fig. 14 bis 19 die zum Verbinden der Mastrohrelemente erforderlichen Manipulationen, und
  • Fig. 20 einen Stativfuss, teilweise geschnitten.
In the drawing, to which reference is made in the following description, illustrate:
  • 1 a mast according to the invention, assembled ready for use in the field,
  • 2 the tripod of the mast according to FIG. 1 with the uppermost mast tube element, the tip of which has a cone for receiving the directional radio,
  • 3 the tripod head in section with the lifting and lowering device for the mast tube,
  • 4 the tripod head in plan,
  • 10 the three friction pawls, in each case in the ground and side plan,
  • 11 and 12 functional diagrams of the lifting and lowering device,
  • 13 the connecting elements of the mast tube,
  • 14 to 19 the manipulations required to connect the mast tube elements, and
  • Fig. 20 a tripod foot, partially cut.

Bei dem in Fig. dargestellten Mast bezeichnen 1 das Stativ, 2 das Mastrohr, 3 Abspannseile, die über Umlenkrollen 5, 6, 7, 8, 9 zu einem Seilspanner 10 bekannter Bauart führen, mit dem die Seile 3 einzeln oder gemeinsam gespannt werden können. 11, 12 und 13 bezeichnen Seilhaspeln zum Aufspulen der Seile 3. Um die Stabilität des Mastrohres 2 bei stärkerem Wind zu gewährleisten, werden nach erfolgtem Aufrichten des Mastrohres Seile 4 an den Verankerungspunkten 5, 6 und 7 befestigt und von Hand gespannt.In the mast shown in Fig. 1 denote the tripod, 2 the mast tube, 3 guy ropes, which lead via pulleys 5, 6, 7, 8, 9 to a rope tensioner 10 of known type with which the ropes 3 can be tensioned individually or together . 11, 12 and 13 denote reels for winding the ropes 3. In order to ensure the stability of the mast tube 2 in stronger winds, after the mast tube has been erected, ropes 4 are attached to the anchoring points 5, 6 and 7 and tensioned by hand.

Das in Fig. 2 dargestellte Stativ 1 weist drei in der Länge verstellbare Beine 14 auf, deren Verstellmechanismus weiter unten beschrieben ist. Auf einer gemeinsamen Kopfplatte 15 ist der Stativkopf 16 drehbar gelagert, um den Mast 2, von dem in Fig. 2 das oberste Mastrohrelement 17 in seiner Ausgangsstellung gezeigt ist, in die gewünschte Azimutrichtung drehen zu können. Am oberen Ende des Mastrohrelementes 17 erkennt man ferner einen Kegelzapfen 18 sowie zwei Schäkelplatten 19 zur Befestigung der Abspannseile 3 und 4. Gelenkig gelagerte Pratzen 20 gewährleisten einen sicheren Stand der Stativbeine 14.The stand 1 shown in FIG. 2 has three legs 14 which are adjustable in length, the adjustment mechanism of which is described below. The tripod head 16 is rotatably mounted on a common head plate 15 in order to be able to rotate the mast 2, of which the uppermost mast tube element 17 is shown in its starting position in FIG. 2, in the desired azimuth direction. At the upper end of the mast tube element 17, one can also see a taper pin 18 and two shackle plates 19 for fastening the guy ropes 3 and 4. Articulated claws 20 ensure that the tripod legs 14 stand securely.

Fig. 3 zeigt den Stativkopf 16 mit der darin untergebrachten Hebe- und Senkvorrichtung für das Mastrohr 2 sowie mit dem Mastrohrelement 17. Auf der Kopfplatte 15 ist eine Grundplatte 21 drehbar gelagert, wobei eine Kunststoffscheibe 22 den senkrechten Achsialschub und eine Kunststoffbüchse 23 die waagrechten Kräfte aufnimmt. In der Grundplatte 21 ist eine Ringnut 24, in der sich Gleitsteine 25 mit Innengewinde befinden, die in Verbindung mit Schrauben 26, die durch die Kopfplatte 15 nach oben ragen, ein Festklemmen der Grundplatte21 ermöglichen. Eine am Schraubenende befestigte Scheibe 27 verhindert, dass die Schraube 26 vollständig herausgedreht werden kann.Fig. 3 shows the tripod head 16 with the lifting and lowering device housed therein for the mast tube 2 and with the mast tube element 17. On the head plate 15, a base plate 21 is rotatably supported, with a plastic disc 22 the vertical axial thrust and a plastic sleeve 23 absorbs the horizontal forces. In the base plate 21 there is an annular groove 24 in which there are sliding blocks 25 with an internal thread which, in conjunction with screws 26 which project upwards through the head plate 15, enable the base plate 21 to be clamped. A washer 27 attached to the screw end prevents the screw 26 from being completely unscrewed.

Von den drei Friktionsklinken dient die obere Klinke 28 zum Tragen des Mastrohres, die mittlere Klinke 29 zum Senken und die untere Klinke 30 zum Heben des Mastrohres 17. Dementsprechend werden diese Klinken als Tragklinke, Senkklinke bzw. Hubklinke bezeichnet. Diese Klinken sind in den Fig. 5 bis 10 einzeln im Grund-und Seitenriss dargestellt. Die Tragklinke 28 weist einen um einen Bolzen 31 schwenkbaren Hebedaumen 32 auf mit einer Gewindebohrung 33, in die ein Hebelrohr zur Betätigung des Hebedaumens 32 eingeschraubt werden kann. Auf der dem Hebedaumen 32 gegenüberliegenden Seite weist die Tragklinke 28 zwei Lappen 34 auf (siehe Fig. 6), mit denen sich die Tragklinke auf einen im Gehäuse 35 gelagerten Bolzen 36 abstützt.Of the three friction pawls, the upper pawl 28 serves to carry the mast tube, the middle pawl 29 for lowering and the lower pawl 30 for lifting the mast tube 17. Accordingly, these pawls are referred to as support pawls, countersunk pawls or lifting pawls. These pawls are shown individually in the plan and side view in FIGS. 5 to 10. The carrying pawl 28 has a lifting thumb 32 which can be pivoted about a bolt 31 and has a threaded bore 33 into which a lever tube for actuating the lifting thumb 32 can be screwed. On the side opposite the lifting thumb 32, the support pawl 28 has two tabs 34 (see FIG. 6) with which the support pawl is supported on a bolt 36 mounted in the housing 35.

Zwischen einem Gehäusedeckel37 und der Tragklinke 28 befinden sich zwei in Serie angeordnete Tellerfedern38 und auf der Seite des Hebedaumens 32 sind zwei Schraubendruckfedern 39 zwischen Gehäusedeckel und Tragklinke eingespannt. Hierzu sind in der Tragklinke 28 zwei aus Fig. 5 ersichtliche Führungszapfen 40 vorgesehen.Between a housing cover 37 and the support pawl 28 there are two disc springs 38 arranged in series and on the side of the lifting thumb 32 two helical compression springs 39 are clamped between the housing cover and the support pawl. For this purpose, two guide pins 40 shown in FIG. 5 are provided in the support pawl 28.

Die in den Fig. 7 und 8 im Detail dargestellte Senkklinke 29 trägt auf einer Seite eine mit dem Hebedaumen 32 zusammenwirkende Rolle 41 und auf der gegenüberliegenden Seite zwei Gewindestifte 42 mit Muttern 43 zum Fixieren der Gewindestifte 42, die als Klinkendrehpunkte dienen.The countersunk pawl 29 shown in detail in FIGS. 7 and 8 carries on one side a roller 41 cooperating with the lifting thumb 32 and on the opposite side two setscrews 42 with nuts 43 for fixing the setscrews 42, which serve as pawl pivot points.

Die in den Fig.9 und 10 im Detail dargestellte Hubklinke 30 ist im wesentlichen spiegelverkehrt gleich wie die Senkklinke 29 ausgeführt, besitzt aber zusätzlich an der ihrer Rolle 44 entgegengesetzten Seite eine gerade Schneide 45.The lifting pawl 30 shown in detail in FIGS. 9 and 10 is essentially mirror-inverted, like the lowering pawl 29, but additionally has a straight cutting edge 45 on the side opposite its roller 44.

Die Klinken 28, 29 und 30 sind mit einer zur Klinkenebene um einige Grad geneigten Bohrung 46, 47 bzw. 48 versehen, welche das Mastrohr umschliessen und in bekannter Weise ein Verkanten und eine Selbsthemmung auf dem Mastrohr ermöglichen. Die Hubklinke 30 weist ebenfalls zwei Gewindestifte 49 und Muttern 50 zu deren Fixierung auf, wobei diese Gewindestifte ebenfalls als Klinkendrehpunkte dienen.The pawls 28, 29 and 30 are provided with a bore 46, 47 and 48 which is inclined to the pawl plane by a few degrees, which enclose the mast tube and allow tilting and self-locking on the mast tube in a known manner. The lifting pawl 30 also has two setscrews 49 and nuts 50 for fixing them, these setscrews also serving as pawl pivot points.

Unterhalb der Hubklinke 30 befindet sich ein auf einem Bolzen 51 schwenkbar gelagerter Hebedaumen52 mit einer Gewindebohrung 53, die zur Aufnahme eines Hebelrohrs bestimmt ist. Die beiden, in den Fig. 11 und 12 schematisch dargestellten Hebelrohre 54 und 55 für die Hebedaumen 32 bzw. 52 können durch eine Oeffnung im Stativkopf 16 eingeführt werden, die durch ein Türchen 56 verschliessbar ist.Below the lifting pawl 30 there is a lifting thumb 52 pivotably mounted on a bolt 51 with a threaded bore 53 which is intended to receive a lever tube. The two lever tubes 54 and 55 for the lifting thumbs 32 and 52, which are shown schematically in FIGS. 11 and 12, can be introduced through an opening in the tripod head 16, which can be closed by a door 56.

Zwischen der Senkklinke 29 und der Hubklinke 30 sind eine das Mastrohrelement 17 umschliessende Schraubendruckfeder 57 sowie zwei kleinere Schraubendruckfedern 58, deren Enden in Ausnehmungen 59 bzw. 60 liegen, eingespannt. In den Fig. 11 und 12 sind die Federn 58 nicht gezeigt.A helical compression spring 57 enclosing the mast tube element 17 and two smaller helical compression springs 58, the ends of which lie in recesses 59 and 60, respectively, are clamped between the countersink pawl 29 and the lifting pawl 30. 11 and 12, the springs 58 are not shown.

Auf der den Hebedaumen gegenüberliegenden Seite befindet sich ein Fanghebel 61, der um den Bolzen 36 schwenkbar gelagert ist. Sein unterer Teil ist als Nase 62 ausgebildet und im mittleren Teil weist er eine Reihe von Rastzähnen 63 auf, die dazu bestimmt sind, mit der Schneide 45 der Hubklinke 30 zum Eingriff zu kommen. In der Wand des Gehäuses 35 sitzt eine Schraubendruckfeder 64, die durch eine Schraube 65 gehalten wird. Die Feder 64 drückt die Nase 62 des Fanghebels 61 gegen die Aussenfläche des Mastrohrelementes 17.On the side opposite the lifting thumb is a catch lever 61 which is pivotally mounted about the bolt 36. Its lower part is designed as a nose 62 and in the middle part it has a series of locking teeth 63 which are intended to come into engagement with the cutting edge 45 of the lifting pawl 30. In the wall of the housing 35 there is a helical compression spring 64 which is held by a screw 65. The spring 64 presses the nose 62 of the catch lever 61 against the outer surface of the mast tube element 17.

Die Wirkungsweise der Hebe- und Senkvorrichtung und des Fanghebels geht aus den Fig. 11 und 12 hervor. Beim Hinunterdrücken des Hebelrohres 55 drückt der Hebedaumen 53 zunächst die Rolle 44 und damit die Hubklinke 30 nach oben, wobei gleichzeitig durch die von der Feder 58 auf die Senkklinke 29 übertragene Kraft diese im Uhrzeigersinn geschwenkt wird. Diese Bewegung überträgt sich über die Rolle 41 und den Hebedaumen 32 auf die Tragklinke 28, die sich ebenfalls im Uhrzeigersinn dreht und dadurch das Mastrohrelement 17 freigibt, das bei weiterem Hinunterdrücken des Hebefrohres 55 durch die Hubklinke 30, die inzwischen das Mastrohrelement 17 klemmend erfasst hat, nach oben schiebt. Beim folgenden Aufwärtsziehen des Hebelrohres 55 läuft dieser Vorgang sinngemäss umgekehrt ab, wobei zunächst die Tragklinke 28 zur Wirkung kommt und anschliessend die Hubklinke das Mastrohrelement freigibt.The mode of operation of the lifting and lowering device and the catch lever can be seen from FIGS. 11 and 12. When the lever tube 55 is pressed down, the lifting thumb 53 first presses the roller 44 and thus the lifting pawl 30 upwards, whereby at the same time the force transmitted from the spring 58 to the lowering pawl 29 pivots it clockwise. This movement is transmitted via the roller 41 and the lifting thumb 32 to the pawl 28, which also rotates clockwise and thereby releases the mast tube element 17, which, when the lifting tube 55 is pressed down further, by the lifting pawl 30, which has meanwhile clamped the mast tube element 17 , pushes up. When the lever tube 55 is subsequently pulled up, this process proceeds in reverse, with the pawl 28 first taking effect and then the lifting pawl releasing the mast tube element.

Zum Senken des Mastrohrs wird das Hebelrohr 54 nach unten geschwenkt, wodurch zunächst die Senkklinke 29 zum klemmenden Eingriff mit dem Mastrohrelement 17 gelangt und anschliessend die Hubklinke 30 und die Tragklinke 28 freigegeben werden, so dass beim weiteren Hinunterstossen des Hebelrohrs54 der Mast abgesenkt wird.To lower the mast tube, the lever tube 54 is pivoted downward, as a result of which the lowering pawl 29 first comes into clamping engagement with the mast tube element 17 and then the lifting pawl 30 and the supporting pawl 28 are released, so that the mast is lowered when the lever tube 54 is pushed further down.

Die Tellerfedern 38 und die Schraubendruckfedern 39, 57 und 58 dienen dazu, die Klinken gegeneinander zu verspannen und sie in der für die Funktion erforderlichen Stellung zu halten.The plate springs 38 and the helical compression springs 39, 57 and 58 serve to clamp the pawls against one another and to hold them in the position required for the function.

Die beiden Gewindestifte 42 und 49 mit den dazugehörigen Muttern 43 bzw. 50 dienen zum Einstellen der gegenseitigen Lage der Klinken, insbesondere zur Anpassung an den Mastrohrdurchmesser zum Ausgleich von Durchmessertoleranzen.The two setscrews 42 and 49 with the associated nuts 43 and 50 are used to adjust the mutual position of the pawls, in particular to adapt to the mast tube diameter to compensate for diameter tolerances.

Der Fanghebel61 hat die Aufgabe, die Hubklinke 30 wie in Fig. 12 gezeigt festzuhalten, wenn das nachfolgende Mastrohrelement 67 nicht einwandfrei, d.h., mit seiner Stirnfläche fugenlos an die Stirnfläche 66 des oberen Rohrelementes anstossend, mit letzterem verbunden ist. In diesem Falle drückt die Feder 64 (Fig. 3) den Fanghebel in die in Fig. 12 gezeigte Stellung, wobei die Schneide 45 (Fig. 3) der Hubklinke 30 in eine der Rastzähne 63 einrastet.The catch lever 61 has the task of holding the lifting pawl 30 in place as shown in FIG. 12 if the subsequent mast tube element 67 is not connected to the latter in an impeccable manner, ie, with its end face butting against the end face 66 of the upper tube element. In this case, the spring 64 (FIG. 3) presses the catch lever into the position shown in FIG. 12, the cutting edge 45 (FIG. 3) of the lifting pawl 30 engages in one of the locking teeth 63.

Wird die Hubklinke in dieser Position über den Hebedaumen 52 betätigt, so schwenkt sie so lange leer auf und ab, bis die Rohrelemente ordnungsgemäss verbunden sind, d.h., bis ihre benachbarten Stirnflächen ohne Spalt aneinanderstossen. Dadurch wird einem fehlerhaften Zusammenbau des Mastrohrs vorgebeugt und verhindert, dass das jeweils unterste Mastrohrelement bei Unaufmerksamkeit aus dem Stativkopf herausgehoben wird.If the lifting pawl is actuated in this position via the lifting thumb 52, it swings up and down empty until the tubular elements are properly connected, i.e. until their adjacent end faces abut without a gap. This prevents incorrect assembly of the mast tube and prevents the bottom mast tube element from being lifted out of the tripod head if inattentive.

Die Fig. 13 zeigt die Verbindungselemente zum Zusammenbau der Mastrohrelemente. Sie bestehen aus einem Zuganker 68 mit einem Bund 69 und einem Schraubengewinde 73, das mit dem Innengewinde eines Spannkegels 74 zusammenwirkt. Der Zuganker, dessen Kopf einen Schlitz zur Aufnahme eines entsprechenden Schlüssels aufweist, stützt sich mit seinem Bund 69 auf den in Mastrohrelement befestigten Stützring 70 ab und ist in achsialer Richtung durch einen mittels Schrauben 72 befestigten Deckel 71 gesichert.13 shows the connecting elements for assembling the mast tube elements. They consist of a tie rod 68 with a collar 69 and a screw thread 73 which interacts with the internal thread of a clamping cone 74. The tie rod, the head of which has a slot for receiving a corresponding key, is supported with its collar 69 on the support ring 70 fastened in the mast tube element and is secured in the axial direction by a cover 71 fastened by means of screws 72.

Die Fluchtung der miteinander zu verbindenden Mastrohrelemente 17 und 67 ist durch eine mit dem Rohrelement 67 verbundene Spreizhülse 75 gewährleistet, die im unteren Teil zylindrisch ausgebildet ist und im oberen Teil einen Innenkegel aufweist, in den der Spannkegel 74 eingesetzt ist. Die Spannhülse 75 weist einen Längsschlitz 76 auf, in den eine als Verdrehsicherung wirkende, nicht dargestellte Nase des Spannkegels 74 eingreift. Beim Anziehen des Zugankers 68 mittels des in den Fig. 16 und 19 dargestellten Schlüssels 77 wird das obere Mastrohrelement 17 gegenüber dem unteren Mastrohrelement 67 zentriert und verspannt. Die Fig. 14 bis 19 zeigen schematisch die Manipulationen beim Verbinden bzw. Trennen zweier benachbarter Mastrohrelemente 17 und 67.The alignment of the mast tube elements 17 and 67 to be connected to one another is ensured by an expansion sleeve 75 connected to the tube element 67, which is cylindrical in the lower part and has an inner cone in the upper part, into which the clamping cone 74 is inserted. The clamping sleeve 75 has a longitudinal slot 76, into which a nose of the clamping cone 74, which acts as an anti-rotation lock and engages, engages. When the tie rod 68 is tightened by means of the key 77 shown in FIGS. 16 and 19, the upper mast tube element 17 is centered and braced relative to the lower mast tube element 67. 14 to 19 schematically show the manipulations when connecting or disconnecting two adjacent mast tube elements 17 and 67.

Die Fig. 20 zeigt ein Bein 14 des Stativs und den Verstellmechanismus für die Einstellung der Beinlänge. Es trägt an seinem unteren Ende eine Pratze 21, die an einem verschiebbaren Rohr 78 schwenkbar gelagert ist und für den sicheren Stand des Stativs sorgt. Dieses Rohr 78 ist in seinem oberen Teil mit einer Reihe von Querbohrungen zur Aufnahme eines Bolzens 80 versehen, dessen beidseitig überstehende Enden in zwei einander diametral gegenüberliegenden Längsschlitzen eines äusseren Führungsrohres 79 in der Achsrichtung des Stativbeins verschiebbar sind. Auf dem mit einem Aussengewinde versehenen Führungsrohr79 ist oberhalb des Bolzens 80 ein mit einer Rändelmutter82 verbundenes Schutzrohr 81 und unterhalb des Bolzens 80 eine Rändelmutter 83 vorgesehen. Durch Verspannen der beiden Rändelmuttern 82 und 83 gegen den Bolzen 80 kann die eingestellte Beinlänge fixiert und das Stativbein starr gemacht werden.20 shows a leg 14 of the tripod and the adjustment mechanism for adjusting the leg length. It carries a claw 21 at its lower end, which is pivotably mounted on a displaceable tube 78 and ensures that the tripod stands securely. This tube 78 is provided in its upper part with a series of transverse bores for receiving a bolt 80, the ends of which protrude on both sides are displaceable in the axial direction of the tripod leg in two diametrically opposed longitudinal slots of an outer guide tube 79. On the guide tube 79 provided with an external thread, a protective tube 81 connected to a knurled nut 82 is provided above the bolt 80 and a knurled nut 83 is provided below the bolt 80. By tightening the two knurled nuts 82 and 83 against the bolt 80, the leg length set can be fixed and the tripod leg can be made rigid.

BezeichnungslisteLabel list

  • 1 Stativ1 tripod
  • 2 Mastrohr2 mast tube
  • 3 Abspannseil3 guy rope
  • 4 Abspannseil4 guy rope
  • 5 Umlenkrolle5 pulley
  • 6 Umlenkrolle6 pulley
  • 7 Umlenkrolle7 pulley
  • 8 Umlenkrolle8 pulley
  • 9 Umlenkrolle9 pulley
  • 10 Seilspannwinde10 winch
  • 11 Seilspannwinde11 winch
  • 12 Seilspannwinde12 winch
  • 13 Seilspannwinde13 winch
  • 14 Stativbeine14 tripod legs
  • 15 Kopfplatte15 head plate
  • 16 Stativkopf16 tripod head
  • 17 Mastrohrelement17 mast tube element
  • 18 Kegelzapfen18 tapered pins
  • 19 Schäkelplatte19 shackle plate
  • 20 Pratze20 claws
  • 21 Grundplatte21 base plate
  • 22 Kunststoffscheibe22 plastic disc
  • 23 Kunststoffbüchse23 plastic rifle
  • 24 Ringnut24 ring groove
  • 25 Gleitstein25 sliding block
  • 26 Schraube26 screw
  • 27 Scheibe27 disc
  • 28 Tragklinke28 pawl
  • 29 Senkklinke29 countersink
  • 30 Hubklinke30 jack
  • 31 Bolzen31 bolts
  • 32 Hebedaumen32 lifting thumbs
  • 33 Bohrung33 hole
  • 34 Lappen34 rags
  • 35 Gehäuse35 housing
  • 36 Bolzen36 bolts
  • 37 Gehäusedeckel37 housing cover
  • 38 Tellerfeder38 disc spring
  • 39 Schraubendruckfeder39 helical compression spring
  • 40 Führungszapfen40 guide pins
  • 41 Rolle41 roll
  • 42 Gewindestift42 grub screw
  • 43 Mutter43 mother
  • 44 Rolle44 roll
  • 45 Schneide45 cutting edge
  • 46 Bohrung46 hole
  • 47 Bohrung47 hole
  • 48 Bohrung48 hole
  • 49 Gewindestift49 grub screw
  • 50 Mutter50 mother
  • 51 Bolzen51 bolts
  • 52 Hebedaumen52 lifting thumb
  • 53 Bohrung53 hole
  • 54 Hebelrohr54 lever tube
  • 55 Hebelrohr55 lever tube
  • 56 Türchen56 doors
  • 57 Schraubendruckfeder57 helical compression spring
  • 58 Schraubendruckfeder58 helical compression spring
  • 59 Ausnehmung59 recess
  • 60 Ausnehmung60 recess
  • 61 Fanghebel61 safety catch
  • 62 Nase62 nose
  • 63 Rastzähne63 ratchet teeth
  • 64 Schraubendruckfeder64 helical compression spring
  • 65 Schraube65 screw
  • 66 Stirnfläche66 end face
  • 67 Mastrohrelement67 mast tube element
  • 68 Zuganker68 tie rods
  • 69 Bund69 fret
  • 70 Stützring70 support ring
  • 71 Deckel71 cover
  • 72 Schraube72 screw
  • 73 Gewinde73 threads
  • 74 Spannkegel74 clamping cone
  • 75 Spreizhülse75 expansion sleeve
  • 76 Längsschlitz76 longitudinal slot
  • 77 Schlüssel77 keys
  • 78 Rohr78 tube
  • 79 Führungsrohr79 guide tube
  • 80 Bolzen80 bolts
  • 81 Schutzrohr81 protective tube
  • 82 Rändelmutter82 knurled nut
  • 83 Rändelmutter83 knurled nut

Claims (3)

1. Transportable mast, in particular for point- to-point radio installations, having a tripod and a rotatable tripod head, a mast-raising and -lowering device which is accommodated in the tripod head and contains friction means, mast tube elements which can be fitted into one another and rigidly clamped against each other, and guying elements for fixing the mast on site, characterised in that the friction means of the raising and lowering device consist of three annular friction pawls (28, 29, 30), which surround the mast tube and which are arranged within the tripod head (16) one above the other in the longitudinal direction of the mast tube elements (17, 67) and of which the upper friction powl serves as a support pawl (28), has a manually operable raising cog (32), interactively connected to the middle friction pawl (29), and is pivotably mounted on its side remote from the raising cog (32), that a manually operable raising cog (52), which is interactively connected to the lower friction pawl serving as a raising pawl (30), is pivotably mounted in the tripod head (16), that spring means (57, 58) which are intended to hold the two pawls (29, 30) in contact with the said two raising cogs (32, 52) are provided between the raising pawl (30) and the middle friction pawl serving as a lowering pawl (29), and that means (36, 45, 61, 64, 65) are provided which fix the raising pawl (30) as soon as a lower end face (66) of a mast tube element (17), which end face is not in contact with the neighbouring end face of a next following mast tube element (67), has reached a defined position within the tripod head (16).
2. Mast according to Claim 1, characterised in that the means for fixing the raising pawl (30) consist of a catch lever (61) which is loaded by a helical compression spring (64), is mounted to be pivotable about a bolt (36) and has a nose (62) and ratchet teeth (63), and of an edge (45) provided on the raising pawl (30).
3. Mast according to Claim 1 or 2, characterised in that, to join the mast tube elements (17, 67), an expanding sleeve (75) with an inner cone, a clamping cone (74) intended to interact with this inner cone and having a threaded bore, a tie rod (68) intended to be screwed into this threaded bore, and means (70, 71, 72) for axially fixing the tie rod (68) in the mast tube element (17, 67) are provided.
EP78200068A 1977-08-04 1978-06-29 Transportable mast, especially for directional broadcast installations Expired EP0000793B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9566/77 1977-08-04
CH956677A CH616984A5 (en) 1977-08-04 1977-08-04

Publications (2)

Publication Number Publication Date
EP0000793A1 EP0000793A1 (en) 1979-02-21
EP0000793B1 true EP0000793B1 (en) 1981-02-11

Family

ID=4353318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200068A Expired EP0000793B1 (en) 1977-08-04 1978-06-29 Transportable mast, especially for directional broadcast installations

Country Status (6)

Country Link
US (1) US4212015A (en)
EP (1) EP0000793B1 (en)
CA (1) CA1105612A (en)
CH (1) CH616984A5 (en)
DE (2) DE7726367U1 (en)
IT (1) IT1097412B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201067C2 (en) * 1981-01-28 1988-04-14 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter Telescopic mast
DE3319330C2 (en) * 1983-05-27 1986-01-23 Südwestfunk, Anstalt des öffentlichen Rechts, 7570 Baden-Baden Antenna system, in particular for filling transmitters and receiving stations
US4587526A (en) * 1984-05-02 1986-05-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Latching mechanism for deployable/re-stowable columns useful in satellite construction
FR2575147B1 (en) * 1984-12-26 1988-03-25 Mathellier Gervais VARIABLE HEIGHT TRIPOD FOR LIFTING LIGHTING EQUIPMENT OR ANY OTHER LOAD
FR2597849B1 (en) * 1986-04-24 1990-10-26 Etu Rech Chimiq Lab METHOD FOR LIFTING A MAT IN MULTIPLE ELEMENTS, MEANS FOR CARRYING OUT THE METHOD AND MATS PROVIDED WITH SUCH MEANS
GB8720658D0 (en) * 1987-09-02 1987-10-07 C S Antennas Ltd Telescopic masts
FR2634863B1 (en) * 1988-07-29 1991-03-29 Lerc Lab Etudes Rech Chim BASE FOR AN ANTENNA POLE, ANTENNA POLE PROVIDED WITH THIS BASE AND METHOD FOR BUILDING SUCH A MAT PROVIDED WITH THIS BASE
US5218375A (en) * 1991-11-15 1993-06-08 Antenna Products Corporation Rapidly extendible and retractable antenna mast
US8381460B1 (en) 2007-02-27 2013-02-26 Patrick P. McDermott Extendable beam structure (EBS)
ES2522640T3 (en) * 2009-05-11 2014-11-17 Secobel Base for a transportable mast and mast assembly comprising such base
DK2824325T3 (en) * 2013-07-11 2017-11-27 Siemens Ag Tower section Storage
US11613905B1 (en) 2020-07-29 2023-03-28 Robert C. Lee Antenna tower construction/deconstruction stability assemblies and methods
US20220127867A1 (en) * 2020-10-28 2022-04-28 Innovatech, Llc Temporary brace system for a structure

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GB191006211A (en) * 1910-03-12 1910-10-13 Karl Nitschke Telescopic Lifting-gear.
US1031185A (en) * 1911-11-08 1912-07-02 John Krulish Pipe-pulling machine.
US1851420A (en) * 1930-09-23 1932-03-29 Fulton Sylphon Co Feeding device for strip materials
US2369195A (en) * 1943-06-03 1945-02-13 Anthony P Wiertz Form-raising jack
US2424929A (en) * 1946-10-03 1947-07-29 Lawrence A Haney Post handling jack
US2793717A (en) * 1950-10-07 1957-05-28 Camburn Sales & Mfg Corp Extendable mast
GB705598A (en) * 1951-02-13 1954-03-17 John Hunt Theakston Improvements in masts, poles and the like and the erection thereof
DE962197C (en) * 1952-09-27 1957-04-18 Braselmann Fa Ferd Lifting device with clamp switch mechanism
DE1037098B (en) * 1952-11-11 1958-08-21 Hans Utz Clamping hoist with return device
CH336571A (en) * 1957-02-02 1959-02-28 Mewag Metallwarenfabrik Ag Hoist
US3320703A (en) * 1964-08-26 1967-05-23 Collins Radio Co Device for raising or lowering antenna mast
AT303124B (en) * 1969-07-28 1972-11-10 Alfredo Ferrari Sliding device for car antennas
US3688455A (en) * 1970-10-23 1972-09-05 Sanders Associates Inc Telescoping support with double acting piston and latch and retaining means
FR2167435B1 (en) * 1972-01-14 1975-10-24 Camusat Gueguen Telecomm
FR2263975A1 (en) * 1974-03-15 1975-10-10 Cloup Jean Vertical mast erection equipment - has single motor driving three mast friction rollers and guy rope winches

Also Published As

Publication number Publication date
CA1105612A (en) 1981-07-21
IT7826106A0 (en) 1978-07-26
DE2738317A1 (en) 1979-02-15
CH616984A5 (en) 1980-04-30
EP0000793A1 (en) 1979-02-21
US4212015A (en) 1980-07-08
IT1097412B (en) 1985-08-31
DE7726367U1 (en) 1979-05-10

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