DE828766C - Dial lighting for readable display devices, especially for fare displays on taximeters - Google Patents
Dial lighting for readable display devices, especially for fare displays on taximetersInfo
- Publication number
- DE828766C DE828766C DEN1015A DEN0001015A DE828766C DE 828766 C DE828766 C DE 828766C DE N1015 A DEN1015 A DE N1015A DE N0001015 A DEN0001015 A DE N0001015A DE 828766 C DE828766 C DE 828766C
- Authority
- DE
- Germany
- Prior art keywords
- dial
- disc
- edge
- area
- taximeters
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/28—Structurally-combined illuminating devices
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B13/00—Taximeters
- G07B13/02—Details; Accessories
-
- G—PHYSICS
- G12—INSTRUMENT DETAILS
- G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
- G12B11/00—Indicating elements; Illumination thereof
- G12B11/02—Scales; Dials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/007—Incandescent lamp or gas discharge lamp
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
Description
Um die bekannten Fahrpreisanzeiger bei Taxametern während der Nachtstunden gut ablesen zu können, ist eine Beleuchtung der Ziffern, die den Fahrpreis angeben, notwendig. Die Beleuchtungsvorrichtung muß sich dabei ,vor dem Zifferblatt befinden, um die in der Regel etwas hinter dem Zifferblatt liegenden Ziffern zu beleuchten, zu welchem Zweck ein verhältnismäßig tiefes Gehäuse der Taxameteruhr erforderlich ist. Um den Raumbedarf der Taxameteruhr nicht zu erhöhen, wird die den Gegenstand der Erfindung bildende Zifferblattbeleuchtung vorgeschlagen, die durch eine hinter dem Schutzglas angeordnete Scheibe aus durchsichtigem Kunststoff gekennzeichnet ist, die im Bereich der zu beleuchtenden Ziffern mit Ausschnitten versehen ist, .deren schräge Randkanten die von einer am Rande der Kunststoffscheibe gelegenen Glühlampe ausgehenden Lichtstrahlen nach innen auf die Ziffern reflektieren. Die Beleuchtungsvorrichtung liegt also in einer Ebene mit der Kunststoffscheibe bzw. dem Zifferblatt, so daß das Taxameteruhrgehäuse nicht über das Zifferblatt vorzustehen braucht.To the well-known fare displays on taximeters during the night The digits that indicate the fare are illuminated so that they can be easily read, necessary. The lighting device must be in front of the dial, to illuminate the digits, which are usually a little behind the dial, for what purpose a relatively deep case of the taximeter clock is required is. In order not to increase the space required by the taximeter clock, it becomes the object the invention forming dial lighting proposed by a rear The transparent plastic pane arranged on the protective glass is marked which is provided with cutouts in the area of the digits to be illuminated, .whose sloping edges that of one located on the edge of the plastic disc Light rays emanating from the light bulb reflect inwards onto the digits. the The lighting device is therefore in one plane with the plastic disc or the dial, so that the taximeter watch case does not protrude over the dial needs.
Hinsichtlich weiterer .Merkmale der Erfindung wird auf die Ansprüche verwiesen.With regard to further features of the invention, reference is made to the claims referenced.
In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt.The drawing shows an embodiment of the subject matter of the invention shown.
.Fig. i zeigt eine Taxameteruhr von vorn gesehen, wobei das Gehäuse nur durch gestrichelte Linien dargestellt ist; Fig. 2 zeigt einen senkrechten Schnitt durch das Zifferblatt und die Beleuchtungsvorrichtung..Fig. i shows a taximeter watch viewed from the front, with the case shown only by dashed lines; Fig. 2 shows a vertical section through the dial and the lighting device.
Im gezeichneten Beispiel ist zwischen dem Zifferblatt 1 und dem äußeren Schutzglas q eine durchsichtige Kunststoffscheibe 2 angeordnet, die im Bereich der zu beleuchtenden Ziffern mit Ausschnitten 6 versehen ist. Die Beleuchtungsivorrichtung besteht aus einem Metallrohr .¢, .in dem kleine Soffittenlampen 3 angeordnet und gelagert sind. Diese Beleuchtungsvorrichtung ist im gezeichneten Beispiel der unteren Randkante der Kunststoffscheibe zugeordnet. Das Rohr 4 ist im Bereich der Lampen 3 mit Fensteröffnungen io versehen, durch welche ,die Lichtstrahlen @in die Kunststoffscheibe eintreten. Das Metallrohr 4 erstreckt sich beiderseitig durch das Uhrgehäuse ii nach außen und ist hier durch Schraubkappen 5 abgeschlossen. Die Beleuchtungsvorrichtung bildet also einen von außen für sich zugänglichen Teil, der keinen Zugang zu den übrigen Uhrteilen zuläßt.In the example shown is between the dial 1 and the outer one Protective glass q a transparent plastic disc 2 is arranged in the area of the digits to be illuminated are provided with cutouts 6. The lighting device consists of a metal tube. ¢,. in which small festoon lamps 3 are arranged and are stored. This lighting device is the lower one in the example shown Associated edge of the plastic disc. The tube 4 is in the area of the lamps 3 provided with window openings io through which the light rays @ into the plastic pane enter. The metal tube 4 extends on both sides through the watch case ii to the outside and is closed here by screw caps 5. The lighting device thus forms a part that is accessible from the outside and that does not have access to the other parts of the clock.
Im gezeichneten .Beispiel ist der untere Rand 7 des Ausschnittes 6 der Scheibe 2 derart abgeschrägt, daß diese Ausschnittkante einen Reflektor für die Lichtstrahlen bildet. Aus Fig. 2 ist ersichtlich, daß der durch eine strichpunktierte Linie 12 angegebene Lichtstrahl aus dem Innern der Scheibe 2 nach außen, und zwar gegen das Innere der Uhr, reflektiert wird. Die Anordnung ist so getroffen, daß die abzulesenden Ziffern durch die reflektierten Lichtstrahlen beleuchtet «erden.In the example shown, the lower edge 7 of the cutout 6 is the disc 2 beveled so that this cutout edge is a reflector for which forms rays of light. From Fig. 2 it can be seen that the by a dash-dotted line Line 12 indicated light beam from the inside of the disc 2 to the outside, namely against the inside of the clock. The arrangement is made so that the digits to be read are illuminated by the reflected light rays.
Um eine Reflektion an der hinteren Scheibenfläche zu vermeiden, ist die Scheibe 2 an der mit 8 bezeichneten Stelle, die sich neben der schrägen Randkante 7 befindet, matt ausgebildet. Die schräge Randkante 7 ist vorzugsweise unter einem `'Winkel von etwa 6o° geneigt.In order to avoid a reflection on the rear surface of the pane the disc 2 at the point indicated by 8, which is next to the inclined edge 7 is located, formed matt. The inclined edge 7 is preferably under one `` 'Inclined at an angle of about 60 °.
Das besondere Zifferblatt i kann in Wegfall kommen, wenn die Scheibe 2 selbst als Zifferblatt ausgebildet .ist, d. h. wenn die erforderlichen Bezeichnungen, Inschriften u. dgl. auf der Kunststoffscheibe angebracht oder in letztere eingeprägt sind. Wo die Scheibe undurchsichtig sein soll, .ist sie mit einem Farb- oder Lackauftrag versehen.The special dial i can be omitted if the disc 2 itself is designed as a dial, i.e. H. if the required designations, Inscriptions and the like attached to the plastic disc or stamped into the latter are. Where the pane should be opaque, it is with a paint or varnish application Mistake.
Die Beleuchtungsvorrichtung soll nicht auf Taxameteruhren beschränkt sein, denn die Zifferblattbeleuchtung ist mit gleichem Vorteil auch bei anderen abzulesenden .\nzeigegeräten anwendbar.The lighting device is not intended to be limited to taximeter clocks because the dial lighting is equally advantageous for others to be read. \ nPointing devices applicable.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT828766X | 1949-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE828766C true DE828766C (en) | 1952-01-21 |
Family
ID=11319645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEN1015A Expired DE828766C (en) | 1949-06-09 | 1950-06-10 | Dial lighting for readable display devices, especially for fare displays on taximeters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE828766C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1133903B (en) * | 1955-08-16 | 1962-07-26 | John Edwin Thomas Welland | Display device |
DE1184974B (en) * | 1960-07-08 | 1965-01-07 | T A M Sa Pour Tous App S Mecan | Device for illuminating the numeric scrolls of a display mechanism, which are arranged directly behind a protective wall of the housing and can be observed through viewing openings |
DE19501129A1 (en) * | 1995-01-03 | 1996-07-11 | Willing Gmbh Dr Ing | Disc light |
-
1950
- 1950-06-10 DE DEN1015A patent/DE828766C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1133903B (en) * | 1955-08-16 | 1962-07-26 | John Edwin Thomas Welland | Display device |
DE1184974B (en) * | 1960-07-08 | 1965-01-07 | T A M Sa Pour Tous App S Mecan | Device for illuminating the numeric scrolls of a display mechanism, which are arranged directly behind a protective wall of the housing and can be observed through viewing openings |
DE19501129A1 (en) * | 1995-01-03 | 1996-07-11 | Willing Gmbh Dr Ing | Disc light |
DE19501129C2 (en) * | 1995-01-03 | 2002-07-18 | Willing Gmbh Dr Ing | edge luminaire |
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