DE283281C - - Google Patents
Info
- Publication number
- DE283281C DE283281C DENDAT283281D DE283281DA DE283281C DE 283281 C DE283281 C DE 283281C DE NDAT283281 D DENDAT283281 D DE NDAT283281D DE 283281D A DE283281D A DE 283281DA DE 283281 C DE283281 C DE 283281C
- Authority
- DE
- Germany
- Prior art keywords
- light source
- cylinder
- light
- aperture
- reflector
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 6
- 239000005338 frosted glass Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000000188 Diaphragm Anatomy 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011022 opal Substances 0.000 description 2
- 230000002238 attenuated Effects 0.000 description 1
- 239000005315 stained glass Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1438—Actuating means for dimming masks or screens
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
283281 KLASSE Ab. GRUPPE283281 CLASS Ab. GROUP
Firma ROBERT BOSCH in STUTTGART.ROBERT BOSCH company in STUTTGART.
aus schwach durchscheinendem Material.made of slightly translucent material.
Die blendende Wirkung der starken Scheinwerfer von Automobilen - hat dazu geführt, Vorrichtungen zu konstruieren, die es gestatten, nach Belieben das grelle Licht der Scheinwerfer abzublenden, so daß nur noch so viel bleibt, wie für langsame Fahrt erforderlich ist. Zu diesem Zweck ist vorgeschlagen worden-, Blendschirme verschiedener Form anzuwenden, deren Stellung nach Bedarf so verändertThe dazzling effect of the powerful headlights of automobiles - has led to To construct devices that allow the glare of the headlights to be used at will fade out so that only as much remains as is necessary for slow travel. For this purpose it has been proposed to use visors of various shapes, their position changed as required
ίο werden kann, daß sie die Lichtquelle teilweise oder ganz umschließen. Solche Blendschirme wurden aber bisher aus undurchsichtigem Material hergestellt und gestatteten daher entweder nur ein völliges Abblenden des Lichtes, oder, wenn es teilweise abgeblendet wurde, verblieb dem noch ausstrahlenden Rest die blendende Wirkung der direkten oder parallel reflektierten Strahlen.ίο can be that they are the light source partially or enclose it completely. Such screens have been made from opaque so far Material and therefore allowed either only a complete fade-out of the Light, or, if it was partially dimmed, remained that which was still radiating The rest is the dazzling effect of the direct or parallel reflected rays.
Es ist ferner bekannt, Lichtquellen durch darüber zu schiebende Blenden aus schwach durchscheinendem Material abzudämpfen, wobei indessen die ganze Lichtquelle vollständig von der Blende umhüllt worden ist.It is also known to make light sources weak by sliding diaphragms over them to attenuate translucent material, while the whole light source is completely has been enveloped by the cover.
Diesen bekannten Vorrichtungen gegenüber besteht die Erfindung darin, daß die aus schwach durchscheinendem Material, wie Opalglas, Milchglas, Mattglas 0. dgl., hergestellte Blende von zylindrischer oder ähnlicher Gestalt nach außen offen ist und in der die Lichtquelle umschließenden Lage die gegen den Reflektor des Scheinwerfers gerichteten Lichtstrahlen streut, während die nach vorn gerichteten Strahlen durch die freie Blendenöffnung unmittelbar nach außen treten. Diese Blende gestattet daher einerseits je nach dem Grad ihrer Durchsichtigkeit die Stärke des gesamten noch ausgestrahlten Lichtes auf den gewünschten Betrag zu vermindern und bewirkt andererseits, daß dieses Licht zerstreut wird, so daß die blendende Wirkung vollständig aufgehoben ist, aber trotzdem eine gute Sichtbarkeit des Scheinwerfers erhalten bleibt.Compared to these known devices, the invention consists in that the slightly translucent material, such as opal glass, frosted glass, frosted glass, etc., produced Aperture of cylindrical or similar shape is open to the outside and in of the position surrounding the light source, those directed against the reflector of the headlamp Light beams scatters, while the forward beams pass through the free aperture immediately to the outside. This diaphragm therefore allows on the one hand depending on the degree of their transparency the strength of the whole still broadcast To reduce light to the desired amount and on the other hand causes this Light is scattered so that the dazzling effect is completely canceled, however Nevertheless, a good visibility of the headlight is maintained.
In der Zeichnung istIn the drawing is
Fig. ι ein Längsschnitt durch die Achse des Scheinwerfers,Fig. Ι a longitudinal section through the axis of the headlight,
Fig. 2 ein Querschnitt nach 2-2 in Fig. 1.FIG. 2 shows a cross section according to 2-2 in FIG. 1.
Der Zylinder α aus schwach durchscheinendem Material (Mattglas, Milchglas, Opalglas, Buntglas) ist in einer Hülse b gefaßt, welche in dem zylindrischen Teil c der Befestigungsvorrichtung für die Lampe und für den Reflektorspiegel geführt ist. Die Lappen d, d' der Hülse b sind mit den senkrechten Schlitzen e, β' versehen. Die Hebel f, f, welche auf einer Drehachse g befestigt sind, greifen mit Rollenzapfen h, h' in die Schlitze e, e' der Schwanzenden d, d' ein und verschieben somit bei Verdrehung der Welle den Zylinder α parallel zur Längsachse der Glühbirne. Die Welle g wird durch einen außerhalb des Scheinwerfergehäuses liegenden He-The cylinder α made of slightly translucent material (frosted glass, frosted glass, opal glass, stained glass) is held in a sleeve b which is guided in the cylindrical part c of the fastening device for the lamp and for the reflector mirror. The tabs d, d 'of the sleeve b are provided with the vertical slots e, β' . The levers f, f, which are attached to an axis of rotation g, engage with roller pins h, h ' in the slots e, e' of the tail ends d, d ' and thus move the cylinder α parallel to the longitudinal axis of the light bulb when the shaft is rotated . The shaft g is driven by a heater located outside the headlight housing.
bei k verdreht. Sie kann entweder durch eine Feder i in der einen Endlage, beispielsweise in der Stellung des zurückgezogenen Zylinders, gehalten werden. Dann wird sie zweckmäßig durch einen Bowdenzug zurück in die entgegengesetzte Endlage gebracht und festgehalten. Man kann aber auch dem Zylinder jede beliebige Zwischenstellung geben, indem man den Hebel k mit einem starren Gestängetwisted at k. It can either be held in one end position, for example in the position of the retracted cylinder, by a spring i. It is then expediently brought back into the opposite end position by a Bowden cable and held in place. But you can also give the cylinder any intermediate position by connecting the lever k with a rigid linkage
ίο verbindet, welches in allen Zwischenlagen fixiert werden kann.ίο connects which in all intermediate layers can be fixed.
Der Zylinder kann beliebig weit über die Lichtquelle geschoben werden. Ist er ganz zurückgezogen, so werden sämtliche dem Spiegel zugekehrte Strahlen von diesem ungeschwächt reflektiert. Ist er jedoch ganz nach vorn geschoben, so werden die dem Spiegel zugekehrten Strahlen gedämpft, der Spiegel sendet also ein sehr diffuses Licht aus, welches keine Blendwirkung ausübt. In beiden Fällen tritt natürlich noch die Beleuchtung durch das direkte Licht, welches die Glühbirne nach vorn aussendet, hinzu.The cylinder can be pushed as far as you want over the light source. Is it whole withdrawn, all rays directed towards the mirror are not weakened by it reflected. However, if it is pushed all the way forward, the rays directed towards the mirror are attenuated, the The mirror emits a very diffuse light that does not cause any glare. In both In cases, of course, the lighting comes from the direct light emitted by the lightbulb sends out to the front.
Claims (2)
Publications (1)
Publication Number | Publication Date |
---|---|
DE283281C true DE283281C (en) |
Family
ID=538859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT283281D Active DE283281C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE283281C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1005463B (en) * | 1952-08-27 | 1957-04-04 | Alfred Paul Emil Letsch | Dimming device for motor vehicle headlights |
US5895719A (en) * | 1995-12-08 | 1999-04-20 | Pilkington Plc | Borosilicate glasses and second surface mirrors thereof |
-
0
- DE DENDAT283281D patent/DE283281C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1005463B (en) * | 1952-08-27 | 1957-04-04 | Alfred Paul Emil Letsch | Dimming device for motor vehicle headlights |
US5895719A (en) * | 1995-12-08 | 1999-04-20 | Pilkington Plc | Borosilicate glasses and second surface mirrors thereof |
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