EP0431462A2 - Lampe portative - Google Patents

Lampe portative Download PDF

Info

Publication number
EP0431462A2
EP0431462A2 EP90122803A EP90122803A EP0431462A2 EP 0431462 A2 EP0431462 A2 EP 0431462A2 EP 90122803 A EP90122803 A EP 90122803A EP 90122803 A EP90122803 A EP 90122803A EP 0431462 A2 EP0431462 A2 EP 0431462A2
Authority
EP
European Patent Office
Prior art keywords
tube
contact piece
threaded ring
lamp according
metal core
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.)
Withdrawn
Application number
EP90122803A
Other languages
German (de)
English (en)
Other versions
EP0431462A3 (en
Inventor
Friedhelm Harnischmacher
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
ABB Ceag Licht und Stromversorgungstechnik GmbH
CEAG Licht und Stromversorgungstechnik GmbH
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 ABB Patent GmbH, ABB Ceag Licht und Stromversorgungstechnik GmbH, CEAG Licht und Stromversorgungstechnik GmbH filed Critical ABB Patent GmbH
Publication of EP0431462A2 publication Critical patent/EP0431462A2/fr
Publication of EP0431462A3 publication Critical patent/EP0431462A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices

Definitions

  • the invention relates to a hand lamp according to the preamble of claim 1.
  • the object of the invention is to provide a hand lamp of the type mentioned, which is explosion-proof and also has a high luminosity.
  • the invention provides a hand lamp in which the housing, together with the tube and the metal core attached to it, with the threaded ring for holding the pane arrangement, represents a pressure-resistant encapsulation.
  • the gap between the outer surface of the metal core and the inner surface of the tube is designed according to the VDE regulations so that a sufficient gap length and a sufficient gap width is generated there;
  • a gap is also created between the threaded ring and the metal core, that is in the area of the thread, which meets the regulations regarding gap width and Gap length is sufficient, and moreover, the fixing of the disc arrangement within the threaded ring is designed so that sufficient gap lengths and gap widths are generated.
  • the end of the housing opposite the tube is closed pressure-tight.
  • the fixed contact piece of the switch for switching on and off is firmly connected to the threaded ring and the movable contact piece is located on a leaf spring which can be actuated from outside the tube and is attached to the tube, so that when the threaded ring is unscrewed, the fixed contact piece is movable Contact piece is released.
  • the dimensions between the movable contact piece and the fixed contact piece in the direction of unscrewing and the air gap existing between the threaded ring and the metal core are so matched and dimensioned that when the movable contact piece comes out of the reach of the fixed contact piece, for example, in switched on state, the fixed contact piece has separated from the movable contact piece, there is still a sufficient gap length.
  • the current flow is interrupted in any case, even when the lamp is switched on, when the threaded ring is unscrewed, wherein there are still sufficient air gaps as long as the two contact pieces are closed.
  • the fixed contact piece is attached to the outside of the reflector, which reflector is firmly connected to the threaded ring.
  • a plunger which is displaceable transversely to the tube is provided, at the inner end of which the movable contact piece is fastened; the outer end can be acted upon by means of a rotary handle.
  • the passage of the intermediate piece inside the hand lamp in the area of the tube is, of course, flame-proof.
  • the switching handle designed as a rotary handle is provided with an inclined plane, as indicated in claim 7, so that the outer free end of the intermediate piece can be pushed inwards through the inclined plane or pushed outwards due to a compression spring.
  • Another advantage of the invention is that the arrangement, in particular the level of the electrical supply voltage inside the lamp, complies with the regulations of intrinsic safety, so that no ignitable sparks can occur as a result.
  • the configuration within the reflector with the pane arrangement is designed in accordance with the regulations of increased safety, so that, according to the invention, several measures serving to protect against explosion are implemented on the lamp virtually one above the other.
  • the hand lamp 10 has an elongated tubular housing 11, one end of which is secured by a cover cap 12 which partially engages over the end of the housing 11 and is pressure-tightly attached to the housing 11 by means of a weld seam 13.
  • the free end of the cover cap starting from the free edge, has a recess 14 with which the cover cap 12 engages over the housing 11.
  • the housing 11 is encompassed by a tube 15 which is frustoconical; the tube 15 comprises the housing with the socket 16 with a smaller radius and this socket 16 is fastened to the outer surface of the housing 11 by means of a further weld seam 17.
  • a protective layer 18 made of plastic is arranged around part of the cover cap 12, around the socket 16 and around the housing 11.
  • the area 19 of the tube with the larger diameter is cylindrical and encompasses a metal core 20.
  • the metal core 20 has two grooves 21 and 22 on its outer surface, the groove 21 being further away from the connecting piece 16 than the groove 20. This makes it possible, as shown in the figure, that the free end of the area 19 is crimped into the groove 21, see crimping 23 and the groove 22 is covered by the area 19, so that a seal 24 can be inserted into the groove 22 by which the interior of the tube 15 is sealed to the outside.
  • a further crimp 25 is provided, which forms a diameter reduction, so that the metal core 20 is fixed between the crimp 25 and the crimp 23.
  • the metal core 20 has an internal thread 26 on its inner surface, into which the external thread 27 of a threaded ring 28 can be screwed.
  • the threaded ring 28 has at its thread-side end a radially outwardly projecting flange 29 which abuts against the end face of the metal core on the tube side. In the area of this flange 29 there is a groove 30 on the outer surface of the threaded ring, into which a further seal 31 is inserted.
  • the metal core has a circumferential groove 32 on its tube-side end face, which serves to save weight, whereas it has chambers 33 on its tube-side end face, into which the free end of a screw bolt 34, which is screwed into a threaded bore 35, protrudes, so that the unscrewing of the threaded ring is prevented by striking the screw bolt 34 on chamber walls, unless the screw bolt is unscrewed from the threaded ring 28.
  • the threaded ring carries on its inner surface an inwardly projecting nose 36, to which a bush 37, which is inserted into the threaded ring 28, abuts and to the bush 37 there is an internal thread 38.
  • a disk arrangement is struck against the nose 36, which has a compression spring 39 struck directly against the nose 37, a protective disk 40 and a cover disk 41.
  • the cover 41 is in the Bushing 37 inserted, so that between the outer surface of the cover plate 41 and the bushing 37 or the outer surface of the bushing 37 and the inner surface of the threaded ring 28 located there has sufficient air gaps and air gap widths.
  • the cover plate 41, together with the protective plate 40, which is inserted into a recess 42 on the cover plate 41, is struck against the nose 36 by means of a threaded ring 43.
  • a spacer ring 43 adjoins the cover disk 41 and an inner cover disk 44 adjoins this, which itself in turn connects the free end 45 of a reflector 46 that is bent outward in a flange-like manner.
  • the reflector 46 has at its lamp-side end an inner opening 47 which continues into a cylindrical socket 48 with which the reflector 46 is screwed into an internally threaded bore 49 of a lamp holder 50.
  • the lamp holder 50 is cylindrical and has at its lamp-side end a shell-like contact surface 50 which is adapted to the outer contour of the reflector 46; the outer contour of the reflector 46 is also adapted to a sheet metal part 52, which is clamped between the reflector 46 and the contact surface 51 and has a radial shape 53 in the middle of the reflector and an adjoining, perpendicular to it axial shape 54.
  • the axial shape 54 is cylindrical and serves as a fixed contact piece for a switch.
  • the other end of the sheet metal part 52 is fixed between a further spacer ring 55 and the flange 45.
  • a further threaded ring 56 which corresponds to the threaded ring 43a, is used to fix the reflector.
  • the lamp holder has in its approximately central region an inwardly projecting projection 57 which has a cylindrical collar 58 at its inner end, through which a circumferential groove 59 is formed, into which the socket 48 engages.
  • An incandescent lamp 63 is inserted into the lamp holder 50 and presses with its foot against the contact disk 61.
  • a plurality of batteries 64 are inserted into the housing 11, each of which is accommodated in a battery housing 65, which can optionally be made of electrically insulating material.
  • a truncated cone-shaped helical compression spring 66 which presses the batteries 64 against the contact disk 62.
  • a bore 70 through which a bushing 71 is guided, which has an inner blind bore 72 into which a screw bolt 73 is screwed.
  • the bushing 71 is surrounded by a rotary handle 74 which is held by the head of the screw bolt, wherein rotation of the rotary handle 74 is permitted.
  • On the rotary handle 74 there is an oblique circumferential surface 76 against which the outwardly projecting end of a plunger 77 is pressed by means of a spring 78.
  • the plunger 77 is guided within a tube 79, the compression spring 78 surrounding the plunger 77 and both being surrounded by the tube 79.
  • a leaf spring 80 is attached, one end of which projects beyond the plunger and carries a movable contact piece 81, where is fixed against the other end on the inner surface of the tube 15 by means of a rivet connection 82.
  • the threaded ring 28 is unscrewed when the switch is switched on, i.e. when the movable contact piece 81 comes to rest against the fixed contact piece 54, which fixed contact piece 54 is a cylindrical, rotating contact piece, then the air gap is in the area of the threads 26/27 until the fixed contact piece 54 has moved away from the movable contact piece 81 or has been released, so that the current is interrupted at this point before the minimum permissible air gap is reached.
  • the area in which the lamp 63 is located meets the requirements for increased safety, whereas the area that lies within the housing 11 and the tube 15, but outside the reflector and the lamp holder, meets the requirements for flameproof enclosure.
  • the bushing 71 is passed through the tube in a manner that prevents ignition, and is sealed here by the fact that the bushing is fixed therein, as is the fixing of the tube inside the tube, whereas the plunger 77 is passed in the interior of the tube through the tube in a manner that prevents ignition.
  • the electrical arrangement inside the tube and the housing is intrinsically safe.
  • a hook 90 is attached through which a loop 91 is passed so that the hand lamp is more portable.
  • the entire hand lamp is built so that three protective measures overlap each other.
  • the all-encompassing flameproof enclosure made of housing 11, cover cap 12, tube 15, metal core 20, threaded ring 28 and disk arrangement 41, 42 and 44 is the incandescent lamp, the environment of which corresponds to the degree of protection increased security.
  • the internal circuit has the intrinsic safety category A and is dimensioned accordingly.
  • the cylindrical housing 11 with the end cap is practically the handle.
  • the two-part disk can also be cast into the threaded ring insofar as the bush 37 is closed or formed by casting resin.
  • the area of increased security surrounds the light bulb 63. This area is formed by the additional disc 44, the reflector with a metal outer ring, the socket and the contact spring 60 located in the socket.
  • the increased safety area is formed with the aid of seals 95, 96 in the lamp holder and 97 in the area of the contact pressure spring 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP19900122803 1989-12-05 1990-11-29 Portable lamp Withdrawn EP0431462A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940189A DE3940189A1 (de) 1989-12-05 1989-12-05 Handleuchte
DE3940189 1989-12-05

Publications (2)

Publication Number Publication Date
EP0431462A2 true EP0431462A2 (fr) 1991-06-12
EP0431462A3 EP0431462A3 (en) 1992-03-04

Family

ID=6394846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900122803 Withdrawn EP0431462A3 (en) 1989-12-05 1990-11-29 Portable lamp

Country Status (3)

Country Link
EP (1) EP0431462A3 (fr)
DE (1) DE3940189A1 (fr)
NO (1) NO905240L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009143889A1 (fr) * 2008-05-29 2009-12-03 Osram Gesellschaft mit beschränkter Haftung Protection contre l'explosion pour une lampe à haute pression
WO2012163552A1 (fr) * 2011-06-03 2012-12-06 Cooper Crouse-Hinds Gmbh Couvercle et luminaire pourvu d'un tel couvercle
USD951505S1 (en) 2019-05-02 2022-05-10 Milwaukee Electric Tool Corporation Headlamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4110985C2 (de) * 1991-04-05 1994-09-22 Abb Patent Gmbh Verstellbare Reflektoranordnung zur Veränderung der Lichtverteilung einer explosionsgeschützten Handleuchte
DE9412638U1 (de) * 1994-08-05 1994-09-29 Abb Patent Gmbh Explosions- oder schlagwettergeschütztes Leuchtengehäuse

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB308118A (en) * 1928-05-25 1929-03-21 John Downs Improvements in or relating to portable electric lamps
US2535819A (en) * 1945-12-13 1950-12-26 Edison Inc Thomas A Electric safety lamp
DE3028806A1 (de) * 1980-07-30 1982-02-25 Erhard 6927 Bad Rappenau Beck Explosionsgeschuetzte handleuchte
US4489367A (en) * 1983-09-16 1984-12-18 Herron Charles R Headlight permissible for use in explosive atmospheres
DE8802979U1 (fr) * 1988-03-05 1988-07-07 Deilmann-Haniel Gmbh, 4600 Dortmund, De
EP0285349A2 (fr) * 1987-04-03 1988-10-05 The Wolf Safety Lamp Company Limited Lampe portative de sécurité

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209138A (en) * 1962-02-05 1965-09-28 Welch Allyn Inc Explosion-proof headlamp and power source

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB308118A (en) * 1928-05-25 1929-03-21 John Downs Improvements in or relating to portable electric lamps
US2535819A (en) * 1945-12-13 1950-12-26 Edison Inc Thomas A Electric safety lamp
DE3028806A1 (de) * 1980-07-30 1982-02-25 Erhard 6927 Bad Rappenau Beck Explosionsgeschuetzte handleuchte
US4489367A (en) * 1983-09-16 1984-12-18 Herron Charles R Headlight permissible for use in explosive atmospheres
EP0285349A2 (fr) * 1987-04-03 1988-10-05 The Wolf Safety Lamp Company Limited Lampe portative de sécurité
DE8802979U1 (fr) * 1988-03-05 1988-07-07 Deilmann-Haniel Gmbh, 4600 Dortmund, De

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009143889A1 (fr) * 2008-05-29 2009-12-03 Osram Gesellschaft mit beschränkter Haftung Protection contre l'explosion pour une lampe à haute pression
WO2012163552A1 (fr) * 2011-06-03 2012-12-06 Cooper Crouse-Hinds Gmbh Couvercle et luminaire pourvu d'un tel couvercle
CN103717965A (zh) * 2011-06-03 2014-04-09 库珀·克劳斯-海因兹有限责任公司 罩和具有这样的罩的灯具
AU2012265188B2 (en) * 2011-06-03 2015-06-11 Cooper Crouse-Hinds Gmbh Covering and luminaire having such a covering
AU2012265188C1 (en) * 2011-06-03 2015-10-01 Cooper Crouse-Hinds Gmbh Covering and luminaire having such a covering
US9400098B2 (en) 2011-06-03 2016-07-26 Cooper Crouse-Hinds Gmbh Covering and luminaire having such a covering
CN108954261A (zh) * 2011-06-03 2018-12-07 库珀·克劳斯-海因兹有限责任公司 罩和具有这样的罩的灯具
USD951505S1 (en) 2019-05-02 2022-05-10 Milwaukee Electric Tool Corporation Headlamp

Also Published As

Publication number Publication date
DE3940189A1 (de) 1991-06-06
NO905240L (no) 1991-06-06
EP0431462A3 (en) 1992-03-04
NO905240D0 (no) 1990-12-04

Similar Documents

Publication Publication Date Title
EP0889804B1 (fr) Dispositif pour interrompre le flux de courant dans un cable
DE19717802B4 (de) Funkenstrecke
WO2006136378A1 (fr) Lampe portative
DE2051391A1 (de) Tragbare Leuchte, insbesondere Kopfleuchte
DE1944643A1 (de) Gasfeuerzeug mit piezoelektrischer Zuendung
EP0431462A2 (fr) Lampe portative
DE2052040C3 (de) Druckfest geschützte Sicherung
DE3529386C2 (fr)
DE3406295C2 (de) Explosionssicherer Leuchtschalter und Leuchttaster
DE2725196A1 (de) Zuendkerze
EP0314031B1 (fr) Armature d'éclairage avec couvercle transparent et corps de lampe relié au couvercle
DE3215632C2 (de) Gehäuseverschluß für explosionsgeschützte Gehäuse
DE3221111C2 (de) Explosions- oder schlagwettergeschützte elektrische Kupplungssteckvorrichtung
DE19504070C2 (de) Explosionsgeschütztes Gehäuse
EP0565217B1 (fr) Dispositif d'alimentation à sécurité intrinsèque pour un instrument de mesure utilisé dans un environnement susceptible d'explosion
DE2553610C3 (de) Schraubfassung mit Berührungsschutz, insbesondere für Lampen
EP0274658B1 (fr) Coupe circuit antidéflagrant à l'épreuve du grisou
DE10121613A1 (de) Wasserdichte rohrförmige Leuchte
DE2512991C3 (de) Explosionssichere Fassung für Leuchtstofflampen
EP0556710B1 (fr) Lampe
DE102018203383A1 (de) Abtrennanordnung für einen Überspannungsableiter, Überspannungsableiter und Verfahren zur Installation eines Überspannungsableiters
DE3500662C2 (fr)
DE3212541C2 (de) Handleuchte zur Verwendung an explosionsgefährdeten Orten
AT272170B (de) Schaltung für elektrische Sprengzünder
DE1156891B (de) Explosionssicheres Fassungspaar fuer Einstiftsockel-Leuchtstofflampen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920826

17Q First examination report despatched

Effective date: 19931026

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ABB PATENT GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950518