EP0250712A2 - Douille et lampe protégées contre l'explosion pour une lampe fluorescente avec un socle à deux broches - Google Patents

Douille et lampe protégées contre l'explosion pour une lampe fluorescente avec un socle à deux broches Download PDF

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Publication number
EP0250712A2
EP0250712A2 EP87102876A EP87102876A EP0250712A2 EP 0250712 A2 EP0250712 A2 EP 0250712A2 EP 87102876 A EP87102876 A EP 87102876A EP 87102876 A EP87102876 A EP 87102876A EP 0250712 A2 EP0250712 A2 EP 0250712A2
Authority
EP
European Patent Office
Prior art keywords
socket
locking
receiving element
clamping device
pins
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.)
Granted
Application number
EP87102876A
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German (de)
English (en)
Other versions
EP0250712B1 (fr
EP0250712A3 (en
Inventor
Robert Wagner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87102876T priority Critical patent/ATE83341T1/de
Publication of EP0250712A2 publication Critical patent/EP0250712A2/fr
Publication of EP0250712A3 publication Critical patent/EP0250712A3/de
Application granted granted Critical
Publication of EP0250712B1 publication Critical patent/EP0250712B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/965—Dustproof, splashproof, drip-proof, waterproof, or flameproof holders
    • H01R33/9658—Dustproof, splashproof, drip-proof, waterproof, or flameproof holders for tubular fluorescent lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/08—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for supporting tubular fluorescent lamp

Definitions

  • the invention relates to an explosion-proof version of the type of protection Ex e "increased safety" for two-pin base fluorescent lamps, with a loose and secured clamping device for the base pins and associated electrical connection means.
  • the invention relates to an explosion-proof luminaire of the type of protection Ex e “increased safety” with a fluorescent lamp cover that is set up for opening and at least two of the versions mentioned.
  • a flameproof encapsulated contact space in the sense of VDE 0171 requires considerable design effort, especially if, as in this version, the lampholder housing made of insulating material contains a rotatable lampholder insert with metallic contact springs for receiving the pins of the fluorescent lamp.
  • the individual elements must be manufactured with tight tolerances in compliance with the regulations in order to ensure the required ignition breakdown safety.
  • connection clamping device for each socket pin which is secured against self-loosening and always ensures sufficient contact pressure due to its corresponding design, and meets the requirements of electrical equipment for potentially explosive atmospheres of the "increased safety" type of protection is sufficient, namely ensures that no ignitable sparks or arcs can occur at the connection point during operation, so that pressure-tight encapsulated contact spaces etc. can be dispensed with.
  • the published specification contains no indication that how a socket for two-pin fluorescent lamps can be designed to realize this general idea.
  • the object of the invention is therefore to create an explosion-proof version of the type of protection Ex e "increased safety" for two-pin base fluorescent lamps - and a lamp equipped with such sockets, corresponding to this type of protection - which is characterized by a simple structure and high operational reliability.
  • the version mentioned at the outset is characterized in that an insertion opening for the socket pins and the electrical connection means and the clamping element-carrying receiving element is mounted in the socket housing with limited mobility, that the clamping device is coupled to an actuating device which becomes common for both socket pins that on the receiving element a locking device is forcibly coupled to the clamping device, which has at least one between an effective and an ineffective Position adjustable locking element, by which in the active position the socket pins are stable at a predetermined safety distance from live parts of the electrical connection means and that the locking element is automatically controlled by feelers of the locking device which respond to the position of the socket pins with respect to the clamping device in such a way that the Loosened clamping device in its inactive position lockable element is held in its effective position with undissolved clamping device and missing or irregularly standing socket pins.
  • This explosion-proof version ensures that the two base pins of the two-pin base fluorescent lamp are always held together by the clamping devices so that they are properly secured against self-loosening. This rules out that only one socket pin is accidentally clamped and ignitable sparks can occur in the other socket pin. If, on the other hand, the fluorescent lamp is not properly inserted into the socket when the actuating device of the clamping devices is actuated, for example by the base pins not projecting completely into the insertion openings or even being placed on the receiving element next to the insertion openings, the locking element prevents the base pins from being added subsequently live parts of the electrical connection means can be brought into contact. Accordingly, it is ensured that the socket pins can only be energized if they are properly clamped and fixed by the clamping device.
  • the clamping device has a contact spring forming part of the electrical connection means for each socket pin, by means of which the socket pin is clamped in a fixed position in the operating state, both contact springs being coupled to a common actuating element of the actuating device.
  • the contact springs are naturally designed in such a way that they meet the requirements of type of protection Ex e "increased safety". A preferred embodiment of such contact springs is described, for example, in DE-PS 27 06 482.
  • Each of the two contact springs can be part of a clamping insert which is arranged in the receiving element and which has a connecting terminal for an electrical feed line that is electrically conductively connected to the contact spring.
  • the common actuator for the contact springs is advantageously coupled to an actuating device of the actuating device, which in simple cases can be an adjusting screw, for example.
  • the actuating device is a Bowden cable, which permits remote control of the actuating device, which opens up the possibility of the actuating devices to operate several such sockets, for example in one luminaire, simultaneously and together, as will be explained in more detail below.
  • the arrangement is such that the receiving element is axially displaceably mounted in the socket housing against spring action.
  • the cylindrical receiving element can additionally be rotatably supported to a limited extent in the socket housing, so that the fluorescent lamp can be rotated into a desired position, for example to compensate for possible positional tolerances of the base pins.
  • the receiving element in the socket housing is not displaceable, but is only rotatably supported, in which case the base pins can be inserted into the insertion openings in a certain rotational position.
  • the elongated locking element preventing improper insertion of the fluorescent lamp into the socket can expediently be mounted displaceably in the receiving element in the region of the base surface of an attached fluorescent lamp against spring action between its effective position protruding over the receiving element and its inactive position inserted into the receiving element. In its effective position, the locking element thus holds the base of the fluorescent lamp in one such a large distance from the receiving element of the socket that the socket pins can certainly not come into contact with live parts of the electrical connection means.
  • feelers In order to determine the presence or absence or the correct position of the base pins, differently designed feelers can be used. However, it is structurally particularly simple if the sensing means are formed directly by the contact springs, so that additional sensing devices are unnecessary.
  • the actuating member coupled to the two contact springs can be designed to be able to be converted into a locking position locking the locking element in its active position by the spring force of the contact springs.
  • the arrangement can be such that the locking element is rigidly connected to a locking member located in the receiving element, which carries locking means cooperating with the actuating member and that the actuating member is displaceably guided in the receiving body transversely to the locking member.
  • the socket can have an anti-tamper protection for the locking device that is inevitably coupled to the clamping device and is effective when the clamping device is not released.
  • This tamper protection can be designed such that the receiving element is held immovably by the actuator in the socket housing when the actuator is in the locked position. This means that the described subsequent insertion of the fluorescent lamp when the clamping device is closed is no longer possible because the receiving element can no longer be pushed back so far in the socket housing that the socket pins can be inserted into their insertion openings.
  • the version described is particularly suitable for use in explosion-proof luminaires of type of protection Ex e "increased safety".
  • Such lights are usually designed with a fluorescent lamp cover set up for opening and contain at least two of the sockets mentioned together with other likewise explosion-protected components, e.g. Starter in type of protection "flameproof enclosure” Ex d, ballasts in type of protection “sand encapsulation” Ex q, or "increased safety" Ex e, each with terminals in type of protection "increased safety”.
  • such a lamp is of this type formed that the actuators of the two sockets are coupled with a secure central lock inaccessible when the cover is closed.
  • the Bowden cables of the two sockets are coupled to the central lock and this has an actuating element which is held captively when the clamping devices are loosened and by means of which the cover is held in the open state.
  • the sockets When the cover is opened, the sockets are de-energized according to the regulations using assigned switching means. Since the central lock is only accessible after opening the cover, it is thus ensured that the clamping devices of the sockets can only be opened when the voltage is off. At the same time, the central lock ensures that the clamping devices for all socket pins are loosened and, above all, clamped back at the same time, which means that one or more socket pins are inadvertently not clamped when the fluorescent lamp is properly inserted when the sockets are re-energized.
  • the explosion-proof socket for two-pin base fluorescent lamps shown in FIGS. 1-6 has a substantially cylindrical socket housing 1, which can be attached to a lamp or base via a molded-on base part 2 (FIG. 7).
  • a cylindrical receiving element 3 is mounted so as to be longitudinally displaceable, which is formed with a groove 4 which is open at the edge and limits its axial displacement path and into which a screw bolt 5, which also acts as an anti-rotation element, projects into a corresponding threaded hole 6 in the wall of the socket housing 1 is screwed in.
  • two insertion openings 7 At the front end of the receiving element 3, two insertion openings 7 (FIG.
  • Each clamping insert 13 has a metallic contact rail 14 which is essentially U-shaped in cross section and which is located in the recess 10 and two contact springs 15 which are arranged in the two chambers 11, 12 are in the form of approximately heart-shaped so-called cage tension springs.
  • Each of the contact springs 15 is supported with a leg 16 against the contact rail 14 and electrically conductively connected to it, while its other leg 17 extends approximately at right angles to the contact rail 14 through an opening in the bottom thereof.
  • the spring leg 17 has a continuous rectangular opening (18 (FIG. 6) which is designed to receive either a push-through contact pin 8 or the push-through bare end 19 of a flexible electrical lead 20.
  • the contact springs 15 are preloaded in such a way that they are covered 1, they strive to pull down their spring leg 17 and thus the opening 18.
  • a plug-in contact pin 8 or a plug-in line end 19 is pressed against the contact rail 14 to produce a conductive connection, the opening 18 pressing with their inner edge supports on top of the contact pin 8 or the line end 19.
  • the two contact springs 15 ensure a proper, secured against self-loosening clamping connection of a socket pin 8 or line end 19 inserted through the respective opening 18 with the contact rail 14.
  • the contact rail 14 is - as can be seen from Fig. 1 - somewhat shorter than the longitudinal extent of the receiving element 3; it ends at a predetermined distance from the two end faces of the receiving element 3, with its inner bottom wall is somewhat higher than the lower edge of the socket insertion opening 7, which is aligned with it, or of the opposite line insertion opening 21, which is also aligned with it.
  • the contact springs 15 and the contact rail 14 form the electrical connection means for the contact pins 8 of the fluorescent lamp 9 and the two feed lines 20th
  • a recess 22 is formed in the receiving element 3, which is rectangular in cross-section and has an open edge, into which a guide bore 23, which is located centrally between the two chambers 11, 12, as shown in FIG. 4, opens.
  • a cross-sectionally L-shaped actuator 24 with reference to FIG. 1, is adjustable in height, which engages with a guide pin 25 in the bore 23 and with the steel cable 27 passed through a corresponding coaxial bore 26 of the receiving element 3 a Bowden train 28 is connected.
  • the outer casing 29 of the Bowden cable 28 is inserted into a corresponding cylindrical recess in the receiving element 3.
  • a cylindrical cross bolt 30 is used to connect the steel cable 27 to the actuating element 24, which engages in a corresponding recess of approximately semicircular cross section on the underside of the actuating element 24 and to which the steel cable 27 is fastened.
  • the two are the Support pins 15 assigned to socket pins 8 are supported in the manner shown in FIGS. 1-3, the relaxed state of the contact springs 15 being illustrated in FIG. 3, in which the openings 18 lie below the bottom of the contact rail 14 when the socket pin 8 is not inserted, while the actuating member 24 in the receiving element 3 is pressed all the way down by the pretensioning of the contact springs 15.
  • the contact springs 15 assigned to the line ends 19 are actuated by means of a tool, for example a screwdriver, which can be inserted from the outside through an associated operating opening of the receiving element 3 and the socket housing 1, indicated at 32 in FIG. 2.
  • a tool for example a screwdriver
  • two locking elements in the form of two cylindrical locking bolts 33 are mounted in a longitudinally displaceable manner in the receiving element 3, which are rigid at their end lying in the socket housing 1 via a plate 34 both with one another and with two parallel locking bolts 35 also longitudinally displaceably mounted below the contact rails 14 are connected.
  • the free ends of the locking bolts 33 lie within the outline of the base 37 of a fluorescent lamp 9 aligned with the contact pins 8 on the insertion openings 7; they are displaceable in the receiving element 3 between an ineffective position (FIG. 1), in which they are fully inserted into the receiving element 3, and an effective position (FIG. 2), in which they are a distance a above the end face of the receiving element 3 protrude.
  • the distance a is selected such that when the fluorescent lamp base 37 is in contact with the locking bolts at the front in the active position according to FIG. 2, the contact pins 8 of the fluorescent lamp are at a predetermined safety distance from live parts of the electrical connection means, i.e. the spring legs 17 assigned to the contact pins 8 and the contact rail 14.
  • the locking bolts 33 are by an engaging on the plate 34 and other at 38 am Bottom of the socket housing 1 supported compression spring 36 biased into its effective position (Fig. 2).
  • the receiving element 3 is prestressed to the left by a second compression spring 40, which extends next to an opening 39 of the plate 34 and also supports the cable bushing and is supported on the bottom of the socket housing 1, in a position in which the End face of the receiving element 3 is aligned with the end face of the socket housing 1.
  • the two locking bolts 35 each have a locking recess 41 near their free end, into which a strip-like locking lug 42 formed on this can engage when the actuating member 24 is raised.
  • a two-base fluorescent lamp 9 is to be inserted into the socket.
  • the Bowden cable 28 is relaxed; the actuator 24 is therefore pressed under the action of the bias of the two contact springs 15 lying thereon, while the compression spring 36 has moved the locking bolts 35 and the locking bolts 33 with respect to the receiving element 3 to the left, so that the locking bolts 33 are in the active position.
  • the locking lugs 42 of the actuator 24 engage in the locking recesses 41 of the locking bolt 35, whereby the plate 34th the locking bolts 33 are locked in their operative position.
  • the locking bolts 33 thus effectively prevent the insertion of base pins 8 of a fluorescent lamp 9 into the insertion openings 7.
  • the Bowden cable 28 is first tightened, with which the actuator 24, based on FIG. 2, goes up until it reaches the position defined by the stop 31, which is shown in FIG. 1.
  • the locking lugs 42 are lifted out of the locking recesses 41 of the locking bolts 35, while at the same time the spring legs 17 assigned to the base pins 8 are raised to such an extent that their openings 18 are aligned with the insertion openings 7 for the base pins 8.
  • a guide 43 which is arranged on the face of the socket housing 1 or the receiving element 3 and is partially circular in cross section and which covers the base 37 when the fluorescent lamp 9 is inserted, facilitates the correct insertion of the base pins 8.
  • the Bowden cable 28 is now relaxed, with the result that the actuator 24 assigned Contact springs 15 are released and their spring legs 17, based on Fig. 1, can move down. Since the socket pins 8 protrude through the openings of the spring legs 17 when the fluorescent lamp 9 is properly inserted, the spring legs come to rest with the opening edge on the plug-in socket pins 8, with which the socket pins 8 are pressed against the contact rail 14 and securely jammed with them to produce perfect electrical contact conditions will.
  • the socket pins 8 do not protrude through the openings 18 in the spring legs 17.
  • the spring legs 17 acting as sensing members are not prevented by their contact pins 8 from moving downward with respect to FIG. 1, with the result that the contact springs 15 actuate the actuator 24 all the way down to the position shown in FIG. 2. Since the fact that no contacts engage in the openings 18 of the contact springs 17 inevitably means that the base 37 of the fluorescent lamp 9 is at a greater distance from the end wall of the receiving element 3, the locking bolts 33 are not in their ineffective Position (Fig. 1) pushed back. The downward actuator 24 therefore engages with its locking lugs 42 in the locking recesses 41 of the locking bolts 35, whereby the locking bolts 33 are locked in position in their effective position.
  • the two socket housings 1 assigned to a fluorescent lamp 9 are fastened, for example, to the lamp body 44 shown in FIG. 7 or to a wall or the like at a distance corresponding exactly to the length of the fluorescent lamp 9 measured between the two base end faces.
  • the fluorescent lamp 9 can therefore only be inserted into the sockets because of the protruding socket pins 8 in such a way that one of the receiving elements 3 in its socket housing 1 is pushed back against the action of the second compression spring 40 to such an extent that the socket pins 8 in the socket housing 1 of the opposite one Version can be introduced.
  • each socket housing 1 On the inside of each socket housing 1, an axially parallel longitudinal rib 45 (FIGS. 4, 5) is now formed, which engages in a guide groove 46 of the receiving element 3 and causes a longitudinal guide and an anti-rotation device for the latter.
  • the longitudinal rib 45 is shorter than the socket housing 1 and ends with its end face in alignment with the inner wall of the recess 22.
  • a tab-like stop 47 On the actuating member 24, a tab-like stop 47, which projects downward and lies between the locking bolts 35 and is aligned with the longitudinal rib 45, is formed, based on FIGS. 1-3.
  • the contact springs 15 can actuate the actuator 24 into that shown in FIG Transfer to a further lowered position compared to FIG. 2, in which the stop 47 engages over the guide rib 45 on the end face. This means that the receiving element 3 is locked in a form-fitting manner in the socket housing 1. It is therefore no longer possible to use a fluorescent lamp 9 in the two sockets.
  • FIG. 7 A lamp equipped with two of the described sockets is shown in FIG. 7, in which the Bowden cables 28 are only illustrated for a pair of socket housings 1 for the sake of clarity.
  • the two socket housings 1 are attached to the end of the lamp body 44.
  • the Bowden cables 28 are guided to a central lock 48, which is approximately in the middle between the two Socket housing 1 is arranged on the side of the lamp body 44 facing away from the socket housing, such that it is not accessible from above when the lamp is attached to the ceiling etc.
  • the central lock 48 has a U-shaped bracket 49 fastened to the bottom of the substantially U-shaped lamp body 44 in cross section, on the two flanges of which the casings 29 of the two Bowden cables 28 are supported, while the associated steel cables 27 are drilled through corresponding holes in the bow legs go to a substantially cylindrical actuating disc 50, on the circumference of which they are anchored at two opposite points.
  • the actuating disc 50 is rotatably mounted on the lamp body 44 about an axis of rotation indicated at 51 in FIG. 8. It is associated with a tubular key socket 52 fastened to the lamp body 44, which carries grooves 53 in the region of its front wall in the manner of a bayonet lock and into which an actuating square 54 formed on the actuating disc 50 projects.
  • a specially designed key 55 is required, which has at the end a socket wrench opening 56 corresponding to the actuating square 54 and of square cross-section, in the area of which two locking lugs 57 projecting outwards are arranged are that cooperate with the grooves 53 of the key socket 52 in the manner of a bayonet lock.
  • a hood-shaped cover 59 is hinged on one side to the lamp body 44, which cover consists of a transparent material and, in the closed state, covers the fluorescent lamp 9 in such a way that the regulations of the type of protection Ex e “increased safety” are met.
  • the cover 59 is an electrical switch, not shown in FIGS. 7, 8, which ensures when the cover 59 is opened that the two sockets are de-energized.
  • the key 55 can then be inserted into the key socket 52 only when the cover 59 is open, which means that the clamping device for the socket pins 8 in both sockets can only be released via the two Bowden cables 28 after the electrical connection means in these sockets have become tension-free.
  • the receiving element 3 is guided in the socket housing 1 by the screw bolt 5 and the guide rib 45 essentially non-rotatably.
  • This limited rotational mobility is achieved in the present case in that the groove 4 receiving the screw bolt 5 has a greater width than the diameter of the screw bolt 5, while on the other hand the guide rib 45 is received in its associated guide groove 46 with greater lateral play.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Connecting Device With Holders (AREA)
EP87102876A 1986-07-01 1987-02-28 Douille et lampe protégées contre l'explosion pour une lampe fluorescente avec un socle à deux broches Expired - Lifetime EP0250712B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102876T ATE83341T1 (de) 1986-07-01 1987-02-28 Explosionsgeschuetzte fassung und leuchte fuer zweistift-sockel-leuchtstofflampen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3621960 1986-07-01
DE19863621960 DE3621960A1 (de) 1986-07-01 1986-07-01 Explosionsgeschuetzte fassung und leuchte fuer zweistiftsockel-leuchtstofflampen

Publications (3)

Publication Number Publication Date
EP0250712A2 true EP0250712A2 (fr) 1988-01-07
EP0250712A3 EP0250712A3 (en) 1990-01-03
EP0250712B1 EP0250712B1 (fr) 1992-12-09

Family

ID=6304086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102876A Expired - Lifetime EP0250712B1 (fr) 1986-07-01 1987-02-28 Douille et lampe protégées contre l'explosion pour une lampe fluorescente avec un socle à deux broches

Country Status (5)

Country Link
US (1) US4828508A (fr)
EP (1) EP0250712B1 (fr)
JP (1) JPS6310484A (fr)
AT (1) ATE83341T1 (fr)
DE (2) DE3621960A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438630A1 (fr) * 1989-12-28 1991-07-31 R. Stahl Schaltgeräte GmbH Douille de lampe anti-déflagrante
CN104180211A (zh) * 2013-05-28 2014-12-03 深圳市海洋王照明工程有限公司 灯具
CN104347968A (zh) * 2013-08-02 2015-02-11 深圳市海洋王照明工程有限公司 灯具的电缆隔爆接头结构

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DE3910872C1 (en) * 1989-04-04 1990-07-12 R. Stahl Schaltgeraete Gmbh, 7118 Kuenzelsau, De Explosion-proof holder (fitment, socket)
DE3943065C1 (en) * 1989-12-28 1991-05-02 R. Stahl Schaltgeraete Gmbh, 7118 Kuenzelsau, De Explosion-protected lamp holder or socket for two-pin base lamp - has two borings in housing arranged in parallel to axis of rotation
DE19522719C1 (de) * 1995-06-22 1997-01-30 Stahl R Schaltgeraete Gmbh Explosionsgeschützte Lampenfassung mit wahlweise zu öffnenden und zu schließenden Kontaktmitteln
DE19731276A1 (de) * 1997-07-22 1999-01-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Anschlußgarnitur für Leuchtstofflampen
JP2001219440A (ja) * 2000-02-09 2001-08-14 Sony Disc Technology Inc 多数個取り用成形装置およびその成形方法
DE102005007302A1 (de) * 2005-02-17 2006-08-24 Abb Patent Gmbh Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum und strombegrenzender Lichtbogenlöscheinrichtung
US7625042B2 (en) * 2006-11-10 2009-12-01 Top Line Seating Inc. Remote quick release locking mechanism
KR20150087428A (ko) * 2010-09-03 2015-07-29 알파발 악티에볼라그 액체 처리용 방염 반응기 및 시스템
DE102012107091A1 (de) * 2012-08-02 2014-02-06 R. Stahl Schaltgeräte GmbH Elektrische Einrichtung mit explosionsgeschützter Steckverbindung

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DE3225768A1 (de) * 1982-07-09 1984-01-12 CEAG Licht- und Stromversorgungstechnik GmbH, 6800 Mannheim Explosionsgeschuetzte leuchte
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438630A1 (fr) * 1989-12-28 1991-07-31 R. Stahl Schaltgeräte GmbH Douille de lampe anti-déflagrante
CN104180211A (zh) * 2013-05-28 2014-12-03 深圳市海洋王照明工程有限公司 灯具
CN104347968A (zh) * 2013-08-02 2015-02-11 深圳市海洋王照明工程有限公司 灯具的电缆隔爆接头结构
CN104347968B (zh) * 2013-08-02 2018-02-06 深圳市海洋王照明工程有限公司 灯具的电缆隔爆接头结构

Also Published As

Publication number Publication date
DE3621960A1 (de) 1988-01-14
JPS6310484A (ja) 1988-01-18
US4828508A (en) 1989-05-09
EP0250712B1 (fr) 1992-12-09
ATE83341T1 (de) 1992-12-15
DE3782977D1 (de) 1993-01-21
EP0250712A3 (en) 1990-01-03

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