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DE2749943A1 - HEADLIGHT WITH A SLIDING COVER - Google Patents

HEADLIGHT WITH A SLIDING COVER

Info

Publication number
DE2749943A1
DE2749943A1 DE19772749943 DE2749943A DE2749943A1 DE 2749943 A1 DE2749943 A1 DE 2749943A1 DE 19772749943 DE19772749943 DE 19772749943 DE 2749943 A DE2749943 A DE 2749943A DE 2749943 A1 DE2749943 A1 DE 2749943A1
Authority
DE
Germany
Prior art keywords
sleeve
headlight
forks
lamp
spring
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Withdrawn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
DE19772749943
Other languages
German (de)
Inventor
Jean Dernoncourt
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Publication of DE2749943A1 publication Critical patent/DE2749943A1/en
Withdrawn legal-status Critical Current

Links

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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/16—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed
    • F21V11/18—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed movable, e.g. flaps, slides
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/006—Fastening of light sources or lamp holders of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base
    • F21V19/0065—Fastening of light sources or lamp holders of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base at least one conductive element acting as a support means, e.g. spring-mounted contact plate in a bayonet base
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Projection Apparatus (AREA)

Description

Scheinwerfer mit einer verschiebbaren AbdeckhülseHeadlight with a sliding cover sleeve

Die Erfindung betrifft einen Scheinwerfer mit einem zylindrischen Körper, der an einen seiner Enden durch eine Glasscheibe verschlossen ist und in dem eine Lampe und ein Spiegel untergebracht sind, deren Aohsen mit derjenigen des Körpers zusammenfallen.The invention relates to a headlight with a cylindrical body which is closed at one of its ends by a glass pane and in which a lamp and a mirror are housed, the Aohsen with that of the Body collapse.

Aufgabe der Erfindung ist die Schaffung eines Scheinwerfers der mit einer Abdeckhülse versehen ist, die die Unterbrechung der Strahlung der Lampe und ihre Reflektierung durch den Spiegel zu verhindern ermöglicht, wenn es erwünscht ist.The object of the invention is to create a headlight which is provided with a cover sleeve, which interrupts the radiation from the lamp and causes it to be reflected to prevent the mirror if so desired.

809818/088!809818/088!

Gemäß der Erfindung weist der Scheinwerfer eine in der Achse des Scheinwerfers angeordnete Abdeckhülse auf, die zwischen einer Abdeckstellung, in der sie die von der Lampe ausgesandten Lichtstrahlen unterbricht, und einer zurückgezogenen Stellung verschiebbar ist, wobei diese Hülse von zwei Gabeln getragen ist, welche quer zur Achse des Scheinwerfers in zwei zueinander annähernd senkrechten Richtungen angeordnet sind und an zwei zur Achse des Spiegels senkrechten Achsen befestigt sind, um welche sich die Gabeln drehen können, um die Hülse in Längsrichtung zu verschieben, wobei eine der Gabeln unter dem Druck einer Feder steht, welche die Hülse aus der zurückgezogenen Stellung in die Abdeckstellung zu verschieben sucht und die andere Gabel von einer Antriebsvorrichtung betätigt wird, durch welche die Hülse in der entgegengesetzten Richtung verschoben werden kann. Die Enden der Gabeln sind beiderseits eines Kragens der Hülse angeordnet, dergestalt, daß sie immer durch die Feder in Kontakt mit dem Kragen gehalten sindo Die die zweite Gabel betätigende Antriebsvorrichtung kann vorteilhaft als Elektromagnet ausgebildet sein.According to the invention, the headlight has a cover sleeve arranged in the axis of the headlight, which can be displaced between a cover position in which it interrupts the light beams emitted by the lamp and a retracted position, this sleeve being carried by two forks which transversely are arranged in two mutually approximately perpendicular directions to the axis of the headlamp and are attached to two axes perpendicular to the axis of the mirror, around which the forks can rotate in order to move the sleeve in the longitudinal direction, one of the forks being under the pressure of a spring which seeks to move the sleeve from the retracted position into the cover position and the other fork is actuated by a drive device by which the sleeve can be moved in the opposite direction. The ends of the forks are arranged on either side of a collar of the sleeve in such a way that they are always held in contact with the collar by the spring. The drive device actuating the second fork can advantageously be designed as an electromagnet.

Ein nicht beschränkendes Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.A non-limiting embodiment of the invention is shown in the drawing and will be described in more detail below described.

Es zeigen:Show it:

Fig. 1 einen axialen Längsschnitt durch einen erfindungsgemäßen Scheinwerfer; und1 shows an axial longitudinal section through a headlight according to the invention; and

809819/0981809819/0981

Pig. 2 eine perspektivische Ansicht der Trag- und Betätigungsvorrichtung für die Abdeckhülse des Scheinwerfers .Pig. 2 is a perspective view of the carrying and operating device for the cover sleeve of the headlight.

Der veranschaulichte Scheinwerfer weist einen mit Rippen 12 versehenen zylindrischen Körper 10 auf, welche seine Kühlung verbessern, Br ist an einem seiner Enden durch einen durch Schrauben unter Zwischenlegen einer Dichtung 16 befestigten Boden 14 und an seinem anderen Ende durch eine Glasscheibe 18 verschlossen, die in eine durch Schrauben unter Zwischenlegung einer Dichtung 21 befestigten Einfassung 20 eingebaut ist.The illustrated headlamp has a cylindrical body 10 provided with ribs 12, which its Improve cooling, Br is at one of its ends by a screw with the interposition of a gasket 16 attached bottom 14 and closed at its other end by a glass pane 18, which is in a through Screws with the interposition of a gasket 21 attached enclosure 20 is installed.

Im Inneren des Körpers 10 und koaxial zu diesem ist eine Büchse 22 eingebaut, deren Durchmesser etwas kleiner als der Innendurchmesser des Körpers ist, dergestalt, daß zwischen ihnen ein Durchlaß 24 mit ringförmigem Querschnitt ausgebildet ist. Die Büchse ist im Körper 10 durch Stopfen und Blattfedern 28 zentriert.Inside the body 10 and coaxial therewith is a Sleeve 22 installed, the diameter of which is slightly smaller than the inner diameter of the body, such that between them a passage 24 is formed with an annular cross-section. The bushing is in the body 10 by means of a plug and leaf springs 28 centered.

Der Scheinwerfer ist mit einer in der Achse des Körpers 10 ang ordneten Lampe 42 mit langgestreckter Form ausgerüstet, die an ihren beiden Enden gelagert und mit Strom versorgt ist.The headlight is equipped with an elongated lamp 42 arranged in the axis of the body 10, which is mounted and powered at both ends.

Der Scheinwerfer weist außerdem eine Abdeckhülse 60 auf, die vor einer zentralen öffnung des Spiegels 36 und koaxial zuThe headlight also has a cover sleeve 60 which in front of a central opening of the mirror 36 and coaxially to

809819/0801809819/0801

diesem angeordnet ist und die Lampe umgibt, sobald ihre Stromversorgung unterbrochen wird, um die von den noch glühenden Elektroden ausgesandte Strahlung zu unterbrechen»this is arranged and the lamp surrounds, as soon as its power supply is interrupted, by the still glowing To interrupt radiation emitted by electrodes »

Die Hülse 60 ist von zwei Gabeln 62 und 64 getragen, die quer zur Achse des Spiegels in zwei zueinander senkrechten Richtungen angeordnet und an zwei Achsen 66 und 68 befestigt sind, die von einer Platte 50 getragen sind (Pig. 2).The sleeve 60 is carried by two forks 62 and 64 which are transverse to the axis of the mirror in two mutually perpendicular Directions are arranged and attached to two axles 66 and 68 carried by a plate 50 (Pig. 2).

Die Hülse 60 weist einen Kragen 70 auf, an dem die Gabeln 62 und 64 angreifen? um die Hülse zu verschieben. Eine Druckfeder 72 zwischen der Platte 50 und der Gabel 62 sucht diese nach vorn zu drehen und die Hülse 60 in derselben Richtung zu verschieben« Die Gabel 64 ist mit einem Elektromagneten verbunden, der an der Platte 50 befestigt ist und der, wenn er erregt wird, die Gabel 64 nach hinten verdreht und die Hülse 60 in derselben Richtung verschiebt. Wenn die Stromversorgung des Elektromagneten unterbrochen ist, hält die Feder 72 die Hülse in ihrer Abdeckstellung fest, wobei die Gabel 62 den Kragen 70 gegen die Gabel 64 drückt, deren Drehung nach vorn durch einen Anschlag begrenzt ist.The sleeve 60 has a collar 70 on which the forks 62 and 64 engage? to move the sleeve. A compression spring 72 between the plate 50 and the fork 62 tries to rotate this forward and the sleeve 60 in the same direction to move «The fork 64 is connected to an electromagnet which is attached to the plate 50 and which, if it is energized, the fork 64 is rotated backwards and the sleeve 60 moves in the same direction. When the power supply of the electromagnet is interrupted, the spring 72 holds the sleeve in its covering position, the Fork 62 presses collar 70 against fork 64, the forward rotation of which is limited by a stop.

Gleichzeitig mit der Lampe wird auch der Elektromagnet 74 mit Strom versorgt und führt über die zwischenliegende Gabel 64 die Hülse in ihre zurückgewogene Stellung hinter dem Spiegele Sobald die Stromversorgung der Lampe und des Elektromagneten unterbrochen ist, bringt die Feder 72 die HülseAt the same time as the lamp, the electromagnet 74 is also supplied with current and leads via the fork in between 64 the sleeve in its re-weighed position behind the mirror as soon as the power supply to the lamp and the electromagnet is interrupted, the spring 72 brings the sleeve

809819/0981809819/0981

wieder in ihre Abdeckstellung.back to their covering position.

Sie Enden der Gabeln liegen an der Hülse einfach an, sind aber nicht mit dieser verbunden, so daß es sehr einfach ist, die Hülse zu demontieren, um sie zu ersetzen, wobei die Gabeln gespreizt werden.The ends of the forks simply rest against the sleeve but not connected to this, so that it is very easy to dismantle the sleeve in order to replace it, spreading the forks.

809818/0881809818/0881

Claims (4)

27499A327499A3 8. November 1977 Akte; PGm 23 458 November 8, 1977 file; PGm 23 458 PatentansprücheClaims )/Scheinwerfer mit einem an seinem vorderen Ende durch eine Glasscheibe verschlossenen Körper, in welchem ein Spiegel, eine) / Headlights with one at its front end through a pane of glass closed body in which a mirror, a .. Lampe und eine in der Achse des Scheinwerfers angeordnete Abdeckhülse untergebracht sind, welche zwischen einer Abdeckstellung, in welcher sie die von der lampe ausgesandten Lichtstrahlen unterbricht, und einer zurückgezogenen Stellung verschiebbar ist, dadurch gekennzeichnet, daß diese Hülse von zwei Gabeln getragen ist, welche quer zur Achse des Scheinwerfers in zwei zueinander senkrechten Richtungen angeordnet sind und an zwei zur Achse des Spiegels senkrechten Achsen befestigt sind, um welche sich die Gabeln drehen können, um die Hülse in Längsrichtung zu verschieben, wobei eine der Gabeln unter dem Druck einer Feder steht, welche die Hülse aus der zurückgezogenen Stellung in die Abdeckstellung zu verschieben sucht,und die andere Gabel von einer Antriebsvorrichtung betätigt wird, durch welche die Hülse in der entgegengesetzten Richtung verschoben werden kann... Lamp and a cover sleeve arranged in the axis of the headlight are housed, which between a cover position in which they emitted by the lamp Interrupts light beams, and is displaceable to a retracted position, characterized in that that this sleeve is carried by two forks which are transverse to the axis of the headlamp in two to each other perpendicular directions and attached to two axes perpendicular to the axis of the mirror, about which the forks can rotate to move the sleeve longitudinally, with one of the forks under the pressure of a There is a spring which seeks to move the sleeve from the retracted position into the covering position, and the other Fork is actuated by a drive device, through which the sleeve in the opposite direction can be moved. 809818/0981 "7"809818/0981 " 7 " 2.) Scheinwerfer nach Anspruch 1, dadurch gekenn zeichnet , daß die Enden der Gabeln, welche die Hülse tragen, beiderseits eines Kragens der Hülse angeordnet sind, dergestalt, daß sie durch diese Feder mit dem Kragen immer in Kontakt gehalten sind. 2.) Headlight according to claim 1, characterized in that the ends of the forks which carry the sleeve, are arranged on both sides of a collar of the sleeve, in such a way that they are always kept in contact by this spring with the collar. 3.) Scheinwerfer nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die Antriebsvorrichtung ein im Körper des Scheinwerfers eingebauter Elektromagnet ist. 3.) Headlight according to claim 1 or 2, characterized in that the drive device is a built-in electromagnet in the body of the headlight. 4.) Scheinwerfer nach Anspruch 3, dadurch gekennzeichnet , daß der Elektromagnet und die Lampe gleichzeitig mit Strom versorgt werden, dergestalt, daß die Hülse in ihre Abdeckstellung durch die Feder verschoben wird, sobald die Stromversorgung der Lampe unterbrochen wird ο 4.) Headlight according to claim 3, characterized in that the electromagnet and the lamp are supplied with power at the same time, such that the sleeve is moved into its cover position by the spring as soon as the power supply to the lamp is interrupted ο 809819/0901809819/0901
DE19772749943 1976-11-10 1977-11-08 HEADLIGHT WITH A SLIDING COVER Withdrawn DE2749943A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7633830A FR2370922A1 (en) 1976-11-10 1976-11-10 Film projector lamp - has hemispherical and cylindrical cap at ends and spring between them permitting axial adjustment

Publications (1)

Publication Number Publication Date
DE2749943A1 true DE2749943A1 (en) 1978-05-11

Family

ID=9179733

Family Applications (3)

Application Number Title Priority Date Filing Date
DE19772749943 Withdrawn DE2749943A1 (en) 1976-11-10 1977-11-08 HEADLIGHT WITH A SLIDING COVER
DE19772749944 Granted DE2749944A1 (en) 1976-11-10 1977-11-08 LAMP FOR A HEADLIGHT AND DEVICE FOR HANDLING AND INSTALLING THIS LAMP
DE19772749942 Withdrawn DE2749942A1 (en) 1976-11-10 1977-11-08 HEADLIGHT

Family Applications After (2)

Application Number Title Priority Date Filing Date
DE19772749944 Granted DE2749944A1 (en) 1976-11-10 1977-11-08 LAMP FOR A HEADLIGHT AND DEVICE FOR HANDLING AND INSTALLING THIS LAMP
DE19772749942 Withdrawn DE2749942A1 (en) 1976-11-10 1977-11-08 HEADLIGHT

Country Status (6)

Country Link
BE (3) BE860008A (en)
DE (3) DE2749943A1 (en)
FR (1) FR2370922A1 (en)
IL (3) IL53329A (en)
IT (3) IT1088221B (en)
NL (3) NL184806C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917745A1 (en) * 1979-05-02 1980-11-13 Arnold & Richter Kg Halogen-metal vapour gas discharge lamp - has cap designed to safeguard properly orientated mounting of lamp and is used for daylight searchlight(s)
DE3207926A1 (en) * 1982-03-05 1983-09-15 Leybold-Heraeus GmbH, 5000 Köln Experiment light
US4510558A (en) * 1983-02-21 1985-04-09 U.S. Philips Corporation Device for producing and projecting light
US4623795A (en) * 1984-05-24 1986-11-18 Penn-Med Technology, Inc. Irradiating device
DE3628088A1 (en) * 1986-08-19 1988-02-25 Bat Cigarettenfab Gmbh DEVICE FOR THE OPTICAL INSPECTION OF THE SURFACE OF ROD-SHAPED SMOKE ARTICLES AND / OR FILTER RODS FOR THE TOBACCO INDUSTRY
DE8802979U1 (en) * 1988-03-05 1988-07-07 Deilmann-Haniel GmbH, 4600 Dortmund Underground spotlights
DE9002461U1 (en) * 1990-03-02 1990-05-03 Siemens AG, 1000 Berlin und 8000 München Workplace light
DE4008932A1 (en) * 1990-03-20 1991-09-26 Siemens Ag MODULAR LIGHTING SYSTEM, ESPECIALLY FOR AIRPORTS AND ROLLERWAYS
GB2244816A (en) * 1990-04-10 1991-12-11 Microphax Limited Illumination apparatus for a microfiche reader
US5404283A (en) * 1992-03-31 1995-04-04 Phoenix Products Company, Inc. Outdoor framing projector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE260053C (en) *
GB388064A (en) * 1931-08-18 1933-02-20 P S R Lamp Co Ltd Improvements in and relating to anti-dazzle devices for headlamps
DE683917C (en) * 1937-10-15 1939-11-18 Paul Schroeder Darkening device on electrical lighting units
DE1005463B (en) * 1952-08-27 1957-04-04 Alfred Paul Emil Letsch Dimming device for motor vehicle headlights

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE443357A (en) * 1937-07-25 1900-01-01 Westfaelische Metall Ind Akt G
NL62449C (en) * 1944-08-22 1949-02-15 Philips Nv Searchlight containing a cooled lamp with reflector
GB1194331A (en) * 1966-04-13 1970-06-10 Harold Martin Light-Projecting Systems.
US3598983A (en) * 1969-04-11 1971-08-10 Emil A Mosser Jr Arc lamp mounting structure
US3703635A (en) * 1970-09-08 1972-11-21 E Systems Inc Zoom light
DE2110802C3 (en) * 1971-03-06 1974-03-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Bulletproof target and searchlights attached to armored vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE260053C (en) *
GB388064A (en) * 1931-08-18 1933-02-20 P S R Lamp Co Ltd Improvements in and relating to anti-dazzle devices for headlamps
DE683917C (en) * 1937-10-15 1939-11-18 Paul Schroeder Darkening device on electrical lighting units
DE1005463B (en) * 1952-08-27 1957-04-04 Alfred Paul Emil Letsch Dimming device for motor vehicle headlights

Also Published As

Publication number Publication date
NL184805C (en) 1989-11-01
FR2370922A1 (en) 1978-06-09
IT1088024B (en) 1985-06-04
NL184805B (en) 1989-06-01
BE860007A (en) 1978-02-15
IL53329A (en) 1980-01-31
IL53331A0 (en) 1978-01-31
NL7711877A (en) 1978-05-12
FR2370922B1 (en) 1982-02-19
DE2749942A1 (en) 1978-05-11
BE860008A (en) 1978-02-15
DE2749944C2 (en) 1987-07-09
IL53331A (en) 1980-11-30
DE2749944A1 (en) 1978-05-11
IL53330A0 (en) 1978-01-31
NL7711883A (en) 1978-05-12
NL184806C (en) 1989-11-01
IT1088169B (en) 1985-06-10
NL7711884A (en) 1978-05-12
NL185418B (en) 1989-11-01
BE860009A (en) 1978-02-15
NL185418C (en) 1990-04-02
NL184806B (en) 1989-06-01
IL53329A0 (en) 1978-01-31
IT1088221B (en) 1985-06-10
IL53330A (en) 1980-09-16

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