EP0141099A2 - Dispositif avertisseur - Google Patents
Dispositif avertisseur Download PDFInfo
- Publication number
- EP0141099A2 EP0141099A2 EP84109896A EP84109896A EP0141099A2 EP 0141099 A2 EP0141099 A2 EP 0141099A2 EP 84109896 A EP84109896 A EP 84109896A EP 84109896 A EP84109896 A EP 84109896A EP 0141099 A2 EP0141099 A2 EP 0141099A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- signaling
- pipe socket
- signaling device
- device head
- 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
Links
- 238000004880 explosion Methods 0.000 claims abstract description 10
- 230000011664 signaling Effects 0.000 claims description 39
- 239000004020 conductor Substances 0.000 claims description 24
- 238000005266 casting Methods 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000005693 optoelectronics Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F9/00—Devices preventing sparking of machines or apparatus
-
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
-
- 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
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/04—Provision of filling media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
Definitions
- the invention relates to a signaling device with the features of the preamble of claim 1.
- the object of the invention is to design a signaling device with the features of the preamble in such a way that a much simpler device head area with high intrinsic safety against an explosion risk is achieved, the device head being able to be assembled and disassembled or replaced or replaced at any time in a potentially explosive area without special tools,
- the in the FIG. 1 shown device head 1 is releasably attached to the front wall 2 of a cabinet or the like without special tools.
- the device head has an insert body 3 which penetrates a hole 4 in the wall 2.
- the insert body has a shoulder 5, which is supported on the outside 6 of the wall 2 with the interposition of a rubber-elastic seal 7.
- the translucent cover 13 covers a lens 15, for example in the colors red, green, blue, yellow, etc., which in turn covers a signaling part designed here as a lighting element 16.
- the luminous element 16 is arranged in the region of a reflector 17, which in the present exemplary embodiment is preferably made of plastic and whose reflector surface is white. It may also be expedient to provide the reflector 17 with a metallic reflection layer, which can be produced, for example, by metallization in a high vacuum (metal vapor deposition).
- the light-emitting element (16) is here particularly advantageously designed as an optoelectronic CERLED light-emitting part, in that preferably six to eight CERLED components 19 are arranged on a carrier plate 18, it also being within the scope of the invention, fewer, for example three or, on the carrier plate to arrange four, or even more, for example fifteen, OERLED components 19.
- the CERLED components essentially consist of a small ceramic carrier on which an LED chip is attached.
- the ceramic carrier of the CERLED component 19 can be provided with a conductive coating on four sides (surface, underside and both end faces).
- the ceramic carrier the dimensions of which can be, for example, about 3.2 by 1.27 by 0.6 millimeters, is bonded on the top with an LED chip.
- a crystal-clear plastic lens with a height of approximately 0.6 millimeters is arranged above the LED chip, which comprehensively protects the LED chip on the top of the ceramic carrier.
- This building block or CERLED Component 19 can be attached to corresponding conductor tracks with its conductive underside and / or with the conductive end faces on the carrier plate 18.
- the lighting element 16 can also have one or more glow lamps, incandescent lamps, filaments, Leuohtdioden and the like.
- the entire lighting element 16 is embedded in the reflector 17 in a casting part 20 which is translucent, so that the light emitted by the lighting element 16 through the casting part 20, the lens 15 and the cover 13 can radiate outward.
- the reflector 17 is associated with a luminaire housing 21, the base wall 22 of which is penetrated by a contact bolt 23 which projects out of the insert body 3 at the bottom.
- the contact pin 23 has an inner axial conductor 24, from which a connecting conductor 25 is guided to the Leuoht element 16.
- the axial conductor 24 is located in a tubular insulating sleeve 26 which is somewhat shorter than the axial conductor 24, so that an upper connection end for the connecting conductor 25 and a lower contact part protrude on the opposite end faces of the insulating sleeve 26.
- the insulating sleeve 26 is in turn surrounded by a metallic sleeve conductor 27, which is somewhat shorter than the insulating sleeve 26, so that the latter protrudes from the sleeve conductor 27 on both ends.
- the sleeve conductor 27 has a collar 28 which rests in the luminaire housing 21 in a supportive manner on the inner surface of the base wall 22.
- a further connecting conductor 29 is preferably on the collar 28 by means of soldering Binding connected, which is also led to the lighting element 16.
- the device head 1 is associated with a housing 30, as is essentially shown in FIG. 2 and 3 is shown.
- the device head 1 is releasably attached to the housing 30 or detachably coupled to the housing 30, so that a complete signaling device 31 is provided in the coupling state.
- the contact pin 23 of the device head 1 is located in a pipe socket 32 of the housing 30.
- the pipe socket 32 and the contact pin 23 inserted into it together form a supply part 33 for the voltage supply to the signaling part or lighting element 16,
- the pipe socket 32 has an insertion bevel 34 for the contact bolt 23 on the free inner edge area facing the device head 1.
- an end flange 35 is formed which is supported on an inner surface of the housing 30.
- a closure end 36 is arranged, which closes the pipe socket 32 at its lower end region.
- the spanking cover 36 has on its side facing the interior of the pipe socket 32 a trough 37 into which the free end of the contact bolt 23 or the axial conductor 24 protruding from the device head 1 can penetrate.
- two electrically conductive base webs 38, 38 ′ are arranged, which are diametrically opposite one another and extend in the longitudinal direction of the pipe socket 32.
- the base webs 38, 38 ' are overlapped at their free ends pointing in the direction of the housing head 1 by inwardly projecting wall parts 39 of the tube mount 32, thereby ensuring that the base webs 38, 381 are firmly held in the tube mount 32.
- the base web 38 is somewhat shorter than the opposite base web 38 '.
- a contact spring 40 formed integrally with the material is located on the base web 38, while a further contact spring 40 I is formed on the base web 38 '.
- the contact springs 40,40 ' are directed obliquely inwards in the direction towards the A CHS center and the closure cover 36 of the pipe socket 32, so that the contact pin can be of the device head 1 without obstruction inserted into the pipe socket 32 23 and a permanent bending of the contact springs 40, 40 'is avoided.
- the contact springs 40, 40 ' have corresponding contact tips at their free ends, the contact tip of the contact spring 40 resting on the free end region of the axial conductor 24 and the contact tip of the other contact spring 40' resting on the outer surface of the sleeve conductor 27.
- Conductor connections 41, 41 ' are formed on the base webs 38, 38', which in the present exemplary embodiment are guided outwards at right angles in the area of the closure cover 36 in opposite directions out of the pipe socket 32.
- Connections 42, 42 ' which lead to an electronic circuit board 43 are connected to the conductor connections 41, 41'.
- the pipe socket 32 is surrounded on its outer circumference by a Druok Culture 44, which is axially displaceably guided on the pipe socket 32 in the longitudinal direction.
- the pressure piece 44 is spring-loaded by a helical compression spring 45, which the pipe socket 32nd also surrounds, is supported at one end on the housing 30 and engages with its other end in an annular groove of the pressure piece 44 and presses the latter upwards in the direction of the device head 1.
- the housing 30 has an approximately hood-shaped holding frame 46, which is connected to the housing 30 by means of a releasable locking or clip lock.
- a spring clip 47 is provided, which connects the releasable coupling between causes the device head 1 and the housing 30,
- An explosion-proof, pressure-resistant space 48 is located under the pipe socket 32, approximately in the central region of the housing 30. At least one voltage limiter and a current limiter (not visible here) are stored in this pressure-resistant space 48, so that the voltage supplied to the lighting element 16 in the device head 1 corresponds to the explosion Intrinsic safety (EN 50020) is limited to a maximum of 18 V and the maximum permissible current flowing here is limited to a maximum of 30 mA.
- This provides a high level of explosion protection with simple means, without the device head 1 being subject to a special encapsulation and special fastening, but instead being able to be safely disconnected from the housing at any time without the voltage having to be switched off and other safety precautions being taken.
- the device head 1 with the signaling part 16 and the feed part 33 is thus designed, starting from the outputs of the upstream voltage and current limiters in the pressure-resistant space 48, according to the invention as an explosion protection intrinsic safety unit 49.
- the voltage limiter in the pressure-resistant space 48 of the housing 30 can advantageously be formed from two Zener diodes connected in parallel, while the current limiter can consist of an appropriately dimensioned resistor. Instead of the resistor, an electronic current limiter can also be provided,
- the voltage limiter and the current limiter are expediently arranged on the electronic circuit board 43 in the pressure-resistant space 48.
- a transformer 50 can also be arranged in the pressure-proof space 48, which, for example, transforms a higher voltage supplied to the signaling device 31 down to the operating voltage supplied to the signaling part 16.
- a rectifier 51 can be arranged on the electronic circuit board 43, via which an AC voltage introduced is rectified for the operation of the lighting element 16.
- it can be expedient to provide an electronic fuse 52 on the electronic circuit board 43 which can preferably be designed as a fuse,
- the voltage limiter, the current limiter, the electronic circuit board 43, the transformer 50, the rectifier 51, the electrical fuse 52 and the connections 42, 42 1 are enclosed by a casting resin 53, so that a safe one Potting is completed against the risk of explosion.
- An epoxy resin or a polyurethane can expediently be provided as the casting resin.
- the casting resin 53 may be expedient to set the casting resin 53 in this way or to make such different offs to choose guides that the parts stored in the pressure-resistant space 48, such as voltage limiter, current limiter, circuit board 43, transformer 50, rectifier 51 and electrical fuse 52, are directly surrounded by an elastic, resilient wall area of the casting resin 53 or the like and that they are then elastic to these Wall area the actual solid cast resin potting is formed.
- the elastic wall area ensures high usability even under extreme loads, such as vibrations and fluctuating temperature intervals, so that there is a high degree of long-term functionality.
- a latching device 54 is arranged above the pressure-free space 48 to the right of the pipe socket 32, which has two switching locks for a shift lever by means of a corresponding link guide a stroke compensation part 55 is actuated, which has a pot bolt 56 in which a helical Ausgleiohafeder 57 is mounted.
- the stroke compensation part 55 is covered at the top by the holding frame 46.
- this chamber 62 is located to the right of the pressure-proof space 48 or next to the electrical fuse 52.
- the pressure-proof chamber 62 there is a microswitch 63 stored, against whose switching pin 64, the plunger 59 acts.
- the pressure-resistant chamber 62 like the pressure-resistant chamber 48, is encapsulated with explosion-proof casting resin 53,
- a hose line 65 is cast in the resin 53 in the area under the pressure-resistant space 48.
- the hose line 65 has individual conductors 66 which are associated with the corresponding electrical functional parts in the housing 30.
- housing 30 with the device head 1 of FIG. 1 shown above, but this is not entirely expedient since the device head according to FIG. 1 is designed as a pure signal lamp, so that no microswitch, no lifting component and no locking device are required.
- a further electrical B component can advantageously be used for a further function. It may also be advantageous to supply the supplied voltage at the correct level (18 V) so that the transformer 50 in the pressure-resistant space 48 can be saved. In this case, the resulting free space can be used advantageously for other parts, such as electronic components (control elements, relays, microprocessors, etc.). As a result, are more appropriate Possible applications for the reporting device 31 according to the invention.
- the housing 30 1 line terminals 67, to which the conductor parts 68 are associated, which are embedded in the casting resin 53, so here no hose line is provided, but the housing 30 'can be connected to busbars or the like.
- the signaling device 31 also has a device head 1 ′ which is designed as an explosion-protected illuminated pushbutton, switching light unit or light switch attachment.
- the lamp housing 21, in which the lighting element 16 is mounted is designed somewhat differently.
- the lens 15 ' is surrounded by a rubber-elastic sleeve 69 and mounted on a push-button 7 is 0, the 30'im in the direction against the housing device head 1' is axially displaceable.
- a pressure sleeve 7 1 is assigned to the push button 70 in the insert body 3.
- This pressure sleeve 71 has a helical spring 72 and acts upon actuation of the push button 70 against the pressure piece 40 surrounding the pipe socket 32, through which the switching stroke is transmitted via the latching device 54, the stroke compensation part 55 and the plunger 59 to the microswitch 63, respectively. It is therefore realized in this embodiment, a Druok switch signaling device, which has a light element 16 in the push button 70 for display, the feed part to the device head 1 and this itself being fully explosion-proof, so that no additional Safety precautions are necessary.
- the device head 1 'with the lighting element 16 and the pushbutton 70 is designed in particular as an explosion-protected switching light unit, which, independently of the proposed invention, already has the particular advantage that a switch or button and a light unit are integrated into a single structural unit are explosion-proof. Such an explosion protection switching light unit is not yet known.
- a temperature fuse in the pressure-tightly encapsulated space 48. This ensures that a maximum outside temperature of, for example, 80 ° C is never exceeded.
- Another essential feature of the invention is that in the device head 1, 1 'different colored and different types of Leuoht advertisements can be replaced and replaced without special safety precautions, so that an optimal functional display can always be achieved according to the respective requirements.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Electromagnetism (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Emergency Alarm Devices (AREA)
- Audible And Visible Signals (AREA)
- Burglar Alarm Systems (AREA)
- Alarm Systems (AREA)
- Telephone Function (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Casings For Electric Apparatus (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84109896T ATE59244T1 (de) | 1983-09-14 | 1984-08-20 | Meldegeraet. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3333135 | 1983-09-14 | ||
DE3333135A DE3333135C2 (de) | 1983-09-14 | 1983-09-14 | Explosionsgeschütztes elektrisches Meldegerät |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0141099A2 true EP0141099A2 (fr) | 1985-05-15 |
EP0141099A3 EP0141099A3 (en) | 1987-08-12 |
EP0141099B1 EP0141099B1 (fr) | 1990-12-19 |
Family
ID=6209031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84109896A Expired - Lifetime EP0141099B1 (fr) | 1983-09-14 | 1984-08-20 | Dispositif avertisseur |
Country Status (5)
Country | Link |
---|---|
US (1) | US4600977A (fr) |
EP (1) | EP0141099B1 (fr) |
JP (1) | JPS6095698A (fr) |
AT (1) | ATE59244T1 (fr) |
DE (2) | DE3333135C2 (fr) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3531052A1 (de) | 1985-08-30 | 1987-03-12 | Bbc Brown Boveri & Cie | Leuchtdrucktaster |
DE3844484C2 (de) * | 1988-12-31 | 1993-10-14 | Priesemuth W | Tastschalter |
DE8908885U1 (de) * | 1989-07-21 | 1990-11-15 | Barlian, Reinhold, Dipl.-Ing. (FH), 97980 Bad Mergentheim | Elektrotechnische Einrichtung |
DE69322415T2 (de) * | 1992-12-02 | 1999-05-20 | Emc Corp., Hopkinton, Ma. | Einschaltstromspitzen- begrenzer |
US5722767A (en) * | 1996-10-22 | 1998-03-03 | Formosa Industrial Computing Inc. | LED display panel structure |
DE19809253A1 (de) * | 1998-03-05 | 1999-09-09 | Aqua Signal Ag | Unterflurleuchte und Gruppe von Unterflurleuchten |
DE59814471D1 (de) * | 1998-03-17 | 2010-12-02 | Endress & Hauser Deutschland A | Elektronisches Gerät für den Einsatz in explosionsgefährdeten Bereichen |
DE19838492A1 (de) * | 1998-08-25 | 2000-03-09 | Stahl R Schaltgeraete Gmbh | Explosionsgeschützte Steckverbindungsanordnung |
US7048423B2 (en) * | 2001-09-28 | 2006-05-23 | Visteon Global Technologies, Inc. | Integrated light and accessory assembly |
US6974234B2 (en) * | 2001-12-10 | 2005-12-13 | Galli Robert D | LED lighting assembly |
DE10210984B4 (de) * | 2002-03-13 | 2008-04-30 | Bartec Gmbh | Meldeleuchte |
DE10210919B4 (de) * | 2002-03-13 | 2006-07-27 | Bartec Gmbh | Meldeleuchte |
US20080025030A9 (en) * | 2003-09-23 | 2008-01-31 | Lee Kong W | Ceramic packaging for high brightness LED devices |
US7854535B2 (en) * | 2003-09-23 | 2010-12-21 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Ceramic packaging for high brightness LED devices |
TWM353308U (en) * | 2008-06-09 | 2009-03-21 | qiu-shuang Ke | LED illumination device |
US8408724B2 (en) * | 2008-12-26 | 2013-04-02 | Toshiba Lighting & Technology Corporation | Light source module and lighting apparatus |
EP2365525A3 (fr) * | 2010-03-12 | 2013-05-29 | Toshiba Lighting & Technology Corporation | Appareil d'éclairage avec un reseau des diodes électroluminescentes rouges et bleues avec revêtement au phosphore |
DE102013111374A1 (de) | 2013-10-15 | 2015-04-16 | R. Stahl Schaltgeräte GmbH | Explosionsgeschützte Anordnung für elektrische und/oder elektronische Bauelemente |
CN103648249B (zh) * | 2013-12-19 | 2016-03-02 | 王轶丹 | 电器呼吸防爆方法及呼吸防爆柜 |
EP3347909B1 (fr) * | 2015-09-09 | 2020-10-28 | Fisher Controls International Llc | Modules indicateurs visuels destinés à être utilisés avec des panneaux de commande, et procédés associés |
CN108709114B (zh) * | 2018-05-25 | 2020-09-08 | 东阳市维创工业产品设计有限公司 | 一种具有散热功能防护性能好的灯具防护装置 |
GB2587199B (en) * | 2019-09-17 | 2021-11-03 | Caterpillar Global Mining Europe Gmbh | Warning device for control module |
CN113819415A (zh) | 2020-06-15 | 2021-12-21 | 伊顿智能动力有限公司 | 防爆照明设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1180444B (de) * | 1962-09-12 | 1964-10-29 | Merten Geb | Elektrischer Schalter mit auswechselbarem Druckknopf |
CH542401A (de) * | 1971-08-19 | 1973-09-30 | Mueller Max | Niederspannungsleuchte |
DE2531968A1 (de) * | 1975-07-17 | 1977-02-03 | Stahl Niederlassung Kuenzelsau | Explosionsgeschuetzte leuchte |
US4142179A (en) * | 1971-04-19 | 1979-02-27 | Lowndes Roy B W | Safety warning lamps for adverse or hazardous atmospheres |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1962550U (de) * | 1967-04-15 | 1967-06-22 | Neumann Elektronik Gmbh | Explosionsgeschuetztes fernsprech-, wechselsprech-, gegensprech- oder lautsprechgeraet. |
DE1949791B2 (de) * | 1969-10-02 | 1980-01-24 | Neumann Elektronik Gmbh, 4330 Muelheim | Schaltung fuer Anruf- und Besetztmeldung in WL-Anlagen |
GB1559495A (en) * | 1976-04-06 | 1980-01-23 | Gossling C C | Electrically illuminated push buttons and indicators |
US4388681A (en) * | 1980-12-15 | 1983-06-14 | Keene Corporation | Hazardous location light fixture |
US4466050A (en) * | 1981-02-27 | 1984-08-14 | Amp Incorporated | Light display assembly |
US4435744A (en) * | 1981-08-10 | 1984-03-06 | Pauluhn Electric Manufacturing Co., Inc. | Explosion-proof fluorescent light fixture |
-
1983
- 1983-09-14 DE DE3333135A patent/DE3333135C2/de not_active Expired
-
1984
- 1984-08-20 EP EP84109896A patent/EP0141099B1/fr not_active Expired - Lifetime
- 1984-08-20 DE DE8484109896T patent/DE3483773D1/de not_active Expired - Lifetime
- 1984-08-20 AT AT84109896T patent/ATE59244T1/de not_active IP Right Cessation
- 1984-09-13 US US06/650,384 patent/US4600977A/en not_active Expired - Lifetime
- 1984-09-14 JP JP59191899A patent/JPS6095698A/ja active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1180444B (de) * | 1962-09-12 | 1964-10-29 | Merten Geb | Elektrischer Schalter mit auswechselbarem Druckknopf |
US4142179A (en) * | 1971-04-19 | 1979-02-27 | Lowndes Roy B W | Safety warning lamps for adverse or hazardous atmospheres |
CH542401A (de) * | 1971-08-19 | 1973-09-30 | Mueller Max | Niederspannungsleuchte |
DE2531968A1 (de) * | 1975-07-17 | 1977-02-03 | Stahl Niederlassung Kuenzelsau | Explosionsgeschuetzte leuchte |
Also Published As
Publication number | Publication date |
---|---|
US4600977A (en) | 1986-07-15 |
EP0141099A3 (en) | 1987-08-12 |
JPS6095698A (ja) | 1985-05-29 |
ATE59244T1 (de) | 1991-01-15 |
DE3333135C2 (de) | 1989-06-08 |
DE3333135A1 (de) | 1985-03-28 |
JPH0410674B2 (fr) | 1992-02-26 |
EP0141099B1 (fr) | 1990-12-19 |
DE3483773D1 (de) | 1991-01-31 |
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