EP0228425B1 - Lighting device for typewriters or printers - Google Patents

Lighting device for typewriters or printers Download PDF

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Publication number
EP0228425B1
EP0228425B1 EP86904145A EP86904145A EP0228425B1 EP 0228425 B1 EP0228425 B1 EP 0228425B1 EP 86904145 A EP86904145 A EP 86904145A EP 86904145 A EP86904145 A EP 86904145A EP 0228425 B1 EP0228425 B1 EP 0228425B1
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EP
European Patent Office
Prior art keywords
typewriter
printer
light fitting
fitting according
fluorescent tube
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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 - Lifetime
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EP86904145A
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German (de)
French (fr)
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EP0228425A1 (en
Inventor
Manfred Schulze
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/18—Mechanisms for rendering the print visible to the operator
    • B41J29/19—Mechanisms for rendering the print visible to the operator with reflectors or illuminating devices

Definitions

  • the invention relates to a lighting device for typewriters or printers with a screen cover arranged above the typewriter or printing unit shaft.
  • Typewriters and printers generally have the requirement that they work as quietly as possible. While the housing walls of the typewriter or printer hold back the sound well and additional insulation measures can be taken if necessary, the typewriter shaft, in which the paper feed with roller and guide rollers and a carriage with the printing unit are located, is a large sound-emitting opening this opening is usually closed with a transparent cover made of plastic, for example acrylic glass. However, reflections often occur, which not only make it difficult to see, but can also cause annoying glare. Therefore, in addition, a pivotable cover made of opaque plastic or metal is generally attached above the covered writing mechanism shaft, which can be adjusted so that reflections are largely avoided. Nevertheless, the insight into the writing mechanism shaft is difficult overall, so that the reading of the written text and the tracking of the writing process are impeded. The same applies to printers.
  • a lighting device for typewriters is known in which an elongated lighting body is arranged above the platen.
  • the lighting fixture shines on the writing area and is shaded in the direction of the operator's eyes.
  • Such a cover is also not present in a typewriter according to GB-A-2 076 744 with a lighting fixture.
  • a transparent hood serves to dampen sound, but leads to the disturbing reflections already explained at the beginning.
  • the invention has for its object to provide a lighting device for typewriters or printers, which provides good lighting in the typewriter shaft in a simple manner without disturbing yourself.
  • the solution to the problem is specified in claim 1.
  • the lighting can then be adjusted at the same time, and it is possible to achieve an eye-friendly, mirror-free and good lighting of the writing material. This is essentially due to the fact that the lighting is from an area above the viewing angle. This also means that there are no shadows from parts of the writing mechanism.
  • the lighting fixture is not a separate component, but is part of the cover, preferably in such a way that the lamp housing is at least partially integrally formed with the cover.
  • the fluorescent tube can either be fixed, for example by gluing, in the lamp housing, so that the entire screen cover must be replaced when replacing it, but this can be a relatively cheap plastic part.
  • a partial shell of the lamp housing is removable and fastened, for example, by clipping, so that the fluorescent tube and, if appropriate, its starter can be replaced.
  • a further development of the invention provides that the screen cover has interchangeable edge parts for attachment to different types of typewriters or printers. Then, if necessary after adjusting the length of the cover, only the appropriate fastening parts for the respective machine need to be attached.
  • the power supply cables for the lighting fixture can advantageously be led through an opening in the housing of the typewriter or printer, ballasts, for example a choke, being arranged in the housing.
  • ballasts for example a choke
  • the connection in the machine expediently takes place behind the switch, so that the lighting device can be switched on and off simultaneously with the machine or the printing.
  • ballast is arranged in a separate housing, which has a connecting cable for the power supply and a socket for connecting the typewriter or the printer, and an connecting line to the fluorescent tube. No additional socket is then required.
  • a connecting cable for the power supply and a socket for connecting the typewriter or the printer, and an connecting line to the fluorescent tube. No additional socket is then required.
  • Rasto r. ganen be plugged into the typewriter, for example by inserting the locking elements in the ventilation slots on the back of the typewriter.
  • a plug-in power supply can also be used to power the lighting device.
  • the typewriter 1 with a conventional keyboard 2 has a cover 3 of its typewriter shaft made of transparent material. At the rear end of the cover 3, a cover 4 is pivotally mounted. At its front edge, the cover 4 carries, with the aid of two clamping brackets 5, a lighting device in the form of a fluorescent tube 6 (FIG. 2), which is inserted into a tube 7 with a slit-shaped light exit window 8. Sockets 9 for the pins 10 of the fluorescent tube 6 close the tube 8 in the assembled state.
  • the power supply lines 11 starting from the sockets 9 are guided through an opening 12 into the housing of the typewriter 1. There is usually enough space to accommodate the ballast (not shown) for the fluorescent tube 6.
  • the electrical connection is expediently carried out in such a way that the switch for the machine simultaneously switches on the lighting device.
  • the lighting device is integrated in the cover 14.
  • the cover 14 has a thickening 15 on the upper front edge, in which a fluorescent tube (not visible) is arranged together with the required starter.
  • a fluorescent tube (not visible) is arranged together with the components of the starter without a housing.
  • a light exit window 18 in the form of a slot is arranged in such a way that good illumination of the writing material is achieved when the cover 14 is set normally.
  • the inside of the cover 14 is matt black to avoid glare, for example by gluing a corresponding film.
  • the cover 14 has fastening eyes 16 which are designed in the same way as in a normal cover. It is then also possible without difficulty for the layman to attach the cover 14 with lighting.
  • the ballast for the fluorescent tube is housed in its own housing 17, which can either stand next to the typewriter or is also attached to the back, for example with the aid of pins which are pressed into the ventilation slots of the typewriter.
  • the housing 17 has a switch 19 with which the lighting can be switched on and off.
  • a line 23 with a socket 24 is provided, which serves as a power supply to the typewriter .

Abstract

The disclosed device is arranged at the height of the conventional protection cover (4, 14) above the writing or printing mechanism. A fluorescent tube (6) may be placed into a separate conduit (7) at the level of the front edge of the protection (4) or may be incorporated into a thickening. A light outlet window (8) is so arranged as to obtain an anti-reflecting lighting of the writing.

Description

Die Erfindung betrifft eine Beleuchtungsvorrichtung für Schreibmaschinen oder Drucker mit einer oberhalb des Schreib- bzw. Druckwerkschachtes angeordneten Blendabdeckung.The invention relates to a lighting device for typewriters or printers with a screen cover arranged above the typewriter or printing unit shaft.

Bei Schreibmaschinen und Druckern besteht' ganz allgemein die Forderung, daß sie möglichst geräuscharm arbeiten. Während die Gehäusewände der Schreibmaschine oder des Druckers den Schall gut zurückhalten und gegebenenfalls zusätzliche Dämmungsmaßnahmen getroffen werden können, stellt der Schreibwerkschacht, in dem sich der Papiereinzug mit Walze und Führungsrollen sowie ein Schlitten mit dem Druckwerk befindet, eine große schallabstrahlende Öffnung dar. Zur Schalldämpfung wird diese Öffnung üblicherweise mit einem durchsichtigen Deckel aus Kunststoff, beispielsweise Acrylglas, verschlossen. Es treten dann jedoch häufig Spiegelungen auf, die nicht nur den Einblick erschweren, sondern störende Blendungen verursachen können. Daher bringt man zusätzlich im allgemeinen oberhalb des abgedeckten Schreibwerkschachtes eine schwenkbare Blendabdeckung aus undurchsichtigem Kunststoff oder aus Metall an, die sich so einstellen läßt, daß Spiegelungen weitgehend vermieden sind. Trotzdem ist insgesamt die Einsicht in den Schreibwerkschacht erschwert, so daß das Lesen des geschriebenen Textes und das Verfolgen des Schreibvorganges behindert sind. Entsprechendes gilt für Drucker.Typewriters and printers generally have the requirement that they work as quietly as possible. While the housing walls of the typewriter or printer hold back the sound well and additional insulation measures can be taken if necessary, the typewriter shaft, in which the paper feed with roller and guide rollers and a carriage with the printing unit are located, is a large sound-emitting opening this opening is usually closed with a transparent cover made of plastic, for example acrylic glass. However, reflections often occur, which not only make it difficult to see, but can also cause annoying glare. Therefore, in addition, a pivotable cover made of opaque plastic or metal is generally attached above the covered writing mechanism shaft, which can be adjusted so that reflections are largely avoided. Nevertheless, the insight into the writing mechanism shaft is difficult overall, so that the reading of the written text and the tracking of the writing process are impeded. The same applies to printers.

Man hat bereits versucht, die Sichtverhältnisse im Schreibwerkschacht durch Anbringen von Lämpchen im Schreibwerkschacht selbst zu verbessern. Hierbei ist aber der Anstrahlwinkel ungünstig, so daß die Papierführungsorgane gerade dort Schatten auf das Papier werfen, wo eine freie Einsicht erwünscht ist, Außerdem steht im Schreibwerkschacht nur sehr wenig Platz zur Verfügung, so daß sich eine wirkungsvolle Beleuchtung nicht unterbringen läßt. Eine Beleuchtung mit einer neben oder hinter der Schreibmaschine bzw. dem Drucker stehenden, beweglichen Lampe führt ebenfalls nicht zu annehmbaren Ergebnissen, weil sich meist keine Einstellung finden läßt, bei der eine gute Beleuchtung ohne Sichtbehinderung durch die Lampe selbst erreicht wird.Attempts have already been made to improve the visibility in the typewriter shaft by attaching lights in the typewriter shaft itself. Here, however, the angle of incidence is unfavorable, so that the paper guide elements cast shadows on the paper precisely where a free view is desired. In addition, there is only very little space available in the typewriter shaft, so that effective lighting cannot be accommodated. Illumination with a movable lamp standing next to or behind the typewriter or the printer likewise does not lead to acceptable results, because usually no setting can be found in which good illumination is achieved without the lamp itself obstructing the view.

Aus der US-A-2 800 573 ist eine Beleuchtungsvorrichtung für Schreibmaschinen bekannt, bei der ein langgestreckter Beleuchtungskörper oberhalb der Schreibwalze angeordnet ist. Der Beleuchtungskörper strahlt auf den Schreibbereich und ist in Richtung auf die Augen der Bedienungsperson abgeschattet, Eine Blendabdeckung ist nicht vorhanden. Auch bei einer Schreibmaschine nach der GB-A-2 076 744 mit Beleuchtungskörper ist eine solche Blendabdekkung nicht vorhanden, Eine transparente Haube dient der Schalldämpfung führt aber zu den eingangs bereits erläuterten störenden Spiegelungen.From US-A-2 800 573 a lighting device for typewriters is known in which an elongated lighting body is arranged above the platen. The lighting fixture shines on the writing area and is shaded in the direction of the operator's eyes. There is no glare cover. Such a cover is also not present in a typewriter according to GB-A-2 076 744 with a lighting fixture. However, a transparent hood serves to dampen sound, but leads to the disturbing reflections already explained at the beginning.

Der Erfindung liegt die Aufgabe zugrunde, eine Beleuchtungsvorrichtung für Schreibmaschinen oder Drucker zu schaffen, die auf einfache Weise für eine gute Beleuchtung im Schreibwerkschacht sorgt, ohne selbst zu stören. Die Lösung der Aufgabe ist im Patentanspruch 1 angegeben. Mit der Einstellung der Blendabdeckung läßt sich dann gleichzeitig die Beleuchtung einstellen, und es kann eine augenschonende, spiegelfreie und gute Beleuchtung des Schreibgutes erzielt werden. Das beruht wesentlich auch darauf, daß die Beleuchtung aus einem Bereich oberhalb des Einblickwinkels erfolgt. Dadurch treten außerdem auch keine Schattenbildungen von Teilen des Schreibwerkes auf.The invention has for its object to provide a lighting device for typewriters or printers, which provides good lighting in the typewriter shaft in a simple manner without disturbing yourself. The solution to the problem is specified in claim 1. With the adjustment of the cover, the lighting can then be adjusted at the same time, and it is possible to achieve an eye-friendly, mirror-free and good lighting of the writing material. This is essentially due to the fact that the lighting is from an area above the viewing angle. This also means that there are no shadows from parts of the writing mechanism.

Der Beleuchtungskörper stellt kein getrenntes Bauteil dar, sondern ist Bestandteil der Blendabdeckung, und zwar vorzugsweise derart, daß das Lampengehäuse wenigstens teilweise einstückig mit der Blendabdeckung ausgebildet ist. Bei geschickter Formgebung und Verwendung einer dünnen Leuchtstoffröhre fällt dann kaum auf, daß die Blendabdeckung eine Beleuchtungsvorrichtung enthält. Außerdem kann durch Austausch gegen die normale Blendabdeckung auch ein Laie die Beleuchtungsvorrichtung installieren.The lighting fixture is not a separate component, but is part of the cover, preferably in such a way that the lamp housing is at least partially integrally formed with the cover. With skilful shaping and the use of a thin fluorescent tube, it is hardly noticeable that the screen cover contains a lighting device. In addition, a layperson can install the lighting device by replacing it with the normal cover.

Die Leuchtstoffröhre kann entweder fest, beispielsweise durch Verkleben, im Lampengehäuse angeordnet sein, so daß bei einem Austausch die gesamte Blendabdeckung gewechselt werden muß die jedoch ein verhältnismäßig, billiges Kunststoffteil sein kann. Es kann jedoch auch vorgesehen sein, daß eine Teilschale des Lampengehäuses abnehmbar und beispielsweise durch Klipsen befestigt ist, so daß die Leuchtstoffröhre und gegebenenfalls ihr Starter gewechselt werden können.The fluorescent tube can either be fixed, for example by gluing, in the lamp housing, so that the entire screen cover must be replaced when replacing it, but this can be a relatively cheap plastic part. However, it can also be provided that a partial shell of the lamp housing is removable and fastened, for example, by clipping, so that the fluorescent tube and, if appropriate, its starter can be replaced.

Damit nicht für jeden Maschinentyp eine besondere Blendabdeckung mit Beleuchtungsvorrichtung hergestellt werden muß, sieht eine Weiterbildung der Erfindung vor, daß die Blendabdekkung auswechselbare Randteile zur Befestigung an unterschiedlichen Schreibmaschinen- bzw. Druckertypen besitzt. Dann brauchen, gegebenenfalls nach einer Längenanpassung der Blendabdeckung, nur jeweils die geeigneten Befestigungsteile für die jeweilige Maschine angebracht zu werden.So that a special screen cover with lighting device does not have to be produced for each machine type, a further development of the invention provides that the screen cover has interchangeable edge parts for attachment to different types of typewriters or printers. Then, if necessary after adjusting the length of the cover, only the appropriate fastening parts for the respective machine need to be attached.

Die Stromzuführungskabel für den Beleuchtungskörper kann man mit Vorteil durch eine Öffnung in das Gehäuse der Schreibmaschine bzw. des Druckers führen, wobei Vorschaltgeräte, beispielsweise eine Drossel, im Gehäuse angeordnet werden. Der Anschluß in der Maschine; erfolgt zweckmäßig hinter deren Schalter, so daß, gleichzeitig mit der Maschine bzw. dem Drucken auch die Beleuchtungsvorrichtung ein- und ausgeschaltet werden kann.The power supply cables for the lighting fixture can advantageously be led through an opening in the housing of the typewriter or printer, ballasts, for example a choke, being arranged in the housing. The connection in the machine; expediently takes place behind the switch, so that the lighting device can be switched on and off simultaneously with the machine or the printing.

Eine Weiterbildung sieht vor, daß deren Vorschaltgerät in einem getrennten Gehäuse angeordnet ist, das ein Anschlußkabel für das Stromnetz und eine Steckbuchse zum Anschluß dεr Schreibmaschine bzw. des Druckers sowie eine e Verbindungsleitung zur Leuchtstoffröhre besitzt. Es ist dann keine zusätzliche Steckdose erforderlich. Das Gehäuse kann neben der Schreibma. schine stehen, zweckmäßig aber auch mit Rasto r. ganen zum Anstecken an die Schreibmaschine versehen sein, beispielsweise durch Einstecken der Rastorgane in die Lüftungsschlitze auf der Rückseite der Schreibmaschine. Zur Stromversorgung der Beleuchtungseinrichtung kann darüberhinaus auch ein Steckernetzteil Verwendung finden.A further development provides that the ballast is arranged in a separate housing, which has a connecting cable for the power supply and a socket for connecting the typewriter or the printer, and an connecting line to the fluorescent tube. No additional socket is then required. In addition to the typ. stand, but also with Rasto r. ganen be plugged into the typewriter, for example by inserting the locking elements in the ventilation slots on the back of the typewriter. A plug-in power supply can also be used to power the lighting device.

Nachfolgend werden Ausführungsbeispiele anhand der Zeichnung beschrieben. Es zeigen:

  • Fig. 1 die perspektivische Ansicht einer Schreibmaschine mit einer Beleuchtungsvorrichtung als Ausführungsbeispiel der Erfindung;
  • Fig. 2 vergrößert die Beleuchtungsvorrichtung nach Fig 1;
  • Fig. 3 ein weiteres Ausführungsbeispiel der Erfindung, bei der die Beleuchtungsvorrichtung Teil der Blendabdeckung ist.
Exemplary embodiments are described below with reference to the drawing. Show it:
  • Figure 1 is a perspective view of a typewriter with a lighting device as an embodiment of the invention.
  • Fig. 2 enlarges the lighting device according to Fig. 1;
  • Fig. 3 shows a further embodiment of the invention, in which the lighting device is part of the cover.

Die Schreibmaschine 1 mit einer üblichen Tastatur 2 weist eine aus durchsichtigem Material bestehende Abdeckung 3 ihres Schreibwerkschachtes auf. Am hinteren Ende der Abdeckung 3 ist eine Blendabdeckung 4 schwenkbar gelagert. An ihrer Vorderkante tragt die Blendabdeckung 4 mit Hilfe von zwei Klemmbügeln 5 eine Beleuchtungsvorrichtung in Form einer Leuchtstoffröhre 6 (Fig. 2), die in ein Rohr 7 mit einem schlitzförmigen Lichtaustrittsfenster 8 eingeschoben ist. Fassungen 9 für die Anschlußstifte 10 der Leuchtstoffröhre 6 schliessen im zusammengebauten Zustand das Rohr 8 ab. Die von den Fassungen 9 ausgehenden Stromzuführungsleitungen 11 sind durch eine Öffnung 12 in das Gehäuse der Schreibmaschine 1 geführt. Dort ist meist ausreichend Platz vorhanden, um die Vorschaltdrossel (nicht dagestellt) für die Leuchtstoffröhre 6 unterzubringen. Der elektrische Anschluß wird zweckmäßig so vorgenommen, daß der Einschalter für die Maschine gleichzeitig auf die Beleuchtungsvorrichtung einschaltet.The typewriter 1 with a conventional keyboard 2 has a cover 3 of its typewriter shaft made of transparent material. At the rear end of the cover 3, a cover 4 is pivotally mounted. At its front edge, the cover 4 carries, with the aid of two clamping brackets 5, a lighting device in the form of a fluorescent tube 6 (FIG. 2), which is inserted into a tube 7 with a slit-shaped light exit window 8. Sockets 9 for the pins 10 of the fluorescent tube 6 close the tube 8 in the assembled state. The power supply lines 11 starting from the sockets 9 are guided through an opening 12 into the housing of the typewriter 1. There is usually enough space to accommodate the ballast (not shown) for the fluorescent tube 6. The electrical connection is expediently carried out in such a way that the switch for the machine simultaneously switches on the lighting device.

Durch richtige Einstellung des Neigungswinkels der Blendabdeckung 4 und durch Drehung des Rohrs 7 und damit des Lichtaustrittsfensters 8 läßt sich eine vom Außenlicht unabhängige, gute und blendfreie Beleuchtung des Schreibgutes erzielen. Die Beleuchtungseinrichtung selbst kann auch nachträglich ohne großen Aufwand vom jeweiligen Kundendienst installiert werden. Wegen der geringen Leistungsaufnahme der Leuchtstoffröhre 6 tritt keine störende Wärmeentwicklungmit unzulässiger Erhitzung von benachbarten Teilen auf.By correctly adjusting the angle of inclination of the cover 4 and by rotating the tube 7 and thus the light exit window 8, good and glare-free illumination of the writing material can be achieved which is independent of the outside light. The lighting device itself can also be installed retrospectively by the respective customer service. Because of the low power consumption of the fluorescent tube 6, there is no disruptive heat development with inadmissible heating of neighboring parts.

Bei dem Ausführungsbeispiel nach Fig. 3 ist die Beleuchtungsvorrichtung in die Blendabdeckung 14 integriert. Dazu weist die Blendabdeckung 14 an der oberen vorderen Kante eine Verdickung 15 auf, in der eine Leuchtstoffröhre (nicht sichtbar) zusammen mit dem erforderlichen Starter angeordnet ist. Um die Verdickung 15 möglichst unauffällig zu halten wird eine möglichst dünne Leuchtstoffröhre zusammen mit den Bauteilen des Starters ohne Gehause verwendet. Ein Lichtaustrittsfenster 18 in Form eines Schlitzes ist so angeordnet, daß bei normaler Einstellung der Blendabdeckung 14 eine gute Ausleuchtung des Schreibgutes erzielt wird. Die Innenseite der Blendabdeckung 14 ist zur Vermeidung von Blendungen schwarz mattiert, beispielsweise durch Aufkleben einer entsprechenden Folie. Zur Befestigung an der Schreibmaschine 1 weist die Blendabdeckung 14 Befestigungsösen 16 auf, die in gleicher Weise wie bei einer normalen Blendabdeckung ausgebildet sind. Es ist dann auch für den Laien ohne Schwierigkeiten möglich, die Blendabdeckung 14 mit Beleuchtung anzubringen.In the exemplary embodiment according to FIG. 3, the lighting device is integrated in the cover 14. For this purpose, the cover 14 has a thickening 15 on the upper front edge, in which a fluorescent tube (not visible) is arranged together with the required starter. In order to keep the thickening 15 as inconspicuous as possible, the thinnest possible fluorescent tube is used together with the components of the starter without a housing. A light exit window 18 in the form of a slot is arranged in such a way that good illumination of the writing material is achieved when the cover 14 is set normally. The inside of the cover 14 is matt black to avoid glare, for example by gluing a corresponding film. For attachment to the typewriter 1, the cover 14 has fastening eyes 16 which are designed in the same way as in a normal cover. It is then also possible without difficulty for the layman to attach the cover 14 with lighting.

Die Vorschaltdrossel für die Leuchtstoffröhre ist in einem eigenen Gehäuse 17 untergebracht, das entweder neben der Schreibmaschine stehen kann oder auch an deren Rückseite befestigt wird, beispielsweise mit Hilfe von Tastzapfen, die in die Belüftungsschlitze der Schreibmaschine eingedrückt werden. Das Gehäuse 17 weist einen Schalter 19 auf, mit dem die Beleuchtung ein- und ausgeschaltet werden kann. Um beim Installieren der beleuchteten Blendabdeckung 14 keine zusätzliche Steckdose erforderlich zu machen, ist neben der Verbindung der Vorschaltdrossel im Gehäuse 17 durch eine Anschlußschnur 20 mit Netzstecker 21 sowie der Verbindung 22 zur Leuchtstoffröhre eine Leitung 23 mit Steckbuchse 24 vorgesehen, die als Stromzuführung zur Schreibmaschine dient.The ballast for the fluorescent tube is housed in its own housing 17, which can either stand next to the typewriter or is also attached to the back, for example with the aid of pins which are pressed into the ventilation slots of the typewriter. The housing 17 has a switch 19 with which the lighting can be switched on and off. In order to make no additional socket necessary when installing the illuminated screen cover 14, in addition to the connection of the series choke in the housing 17 by a connecting cord 20 with a plug 21 and the connection 22 to the fluorescent tube, a line 23 with a socket 24 is provided, which serves as a power supply to the typewriter .

Claims (7)

1. A light fitting for typewriters (1) or printers, comprising a shade (14) disposed above the typewriter or printer well, a lamp housing in the form of an elongate cavity being provided at the front free edge of the shade (14) in a recess (15) and a fluorescent tube together with its starter being disposed in the lamp housing and radiating light on the typing or printing area through a light exit window (18).
2. A light fitting according to claim 1, characterised in that the lamp housing is at least partially integral with the shade (14).
3. A light fitting according to claim 2, characterised in that part of the lamp housing is removable.
4. A light fitting according to claim 2 or 3, characterised in that the shade (14) has interchangeable edge parts (16) for fixing to different types of typewriter or printer.
5. A light fitting according to any one of claims 1 to 4, characterised in that the or each power supply cable (11) for the lamp fittings (6 to 9) is taken through an aperture (12) into the casing of the typewriter (1) or printer, where it is connected to the typewriter power supply behind the typewriter switch.
6. A light fitting according to any one of claims 1 to 4, characterised in that the ballast for the fluorescent tube is disposed in a separate casing (17) having a connecting cable (20) for the power supply and a plug socket (24) for connecting the typewriter or printer and a connecting lead (22) to the fluorescent tube.
7. A light fitting according to claim 6, characterised in that the casing (17) is provided with catch means for fitting to the typewriter or printer.
EP86904145A 1985-07-11 1986-06-30 Lighting device for typewriters or printers Expired - Lifetime EP0228425B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8520058U DE8520058U1 (en) 1985-07-11 1985-07-11 Lighting device for typewriters or printers
DE8520058U 1985-07-11

Publications (2)

Publication Number Publication Date
EP0228425A1 EP0228425A1 (en) 1987-07-15
EP0228425B1 true EP0228425B1 (en) 1990-10-10

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EP86904145A Expired - Lifetime EP0228425B1 (en) 1985-07-11 1986-06-30 Lighting device for typewriters or printers

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US (1) US4813798A (en)
EP (1) EP0228425B1 (en)
DE (2) DE8520058U1 (en)
WO (1) WO1987000124A1 (en)

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US2295210A (en) * 1940-02-21 1942-09-08 Sherman Haynes Illuminated platen
US2670834A (en) * 1950-12-29 1954-03-02 Underwood Corp Quiet typewriter
US2800573A (en) * 1953-11-12 1957-07-23 William E Cole Ii Detachable typewriter lamp
FR1272480A (en) * 1958-11-21 1961-09-29 Explosion-proof lighting device
US3135372A (en) * 1961-03-30 1964-06-02 Scars Roebuck And Co Noiseless typewriter
US3548184A (en) * 1968-04-16 1970-12-15 Milton Fletcher Lamp for typewriter having adjustable leg bracket mounting
DE1917765B2 (en) * 1969-04-08 1972-12-14 Knschker, Joseph, 8961 Waltenhofen LIGHTING DEVICE AND METHOD FOR LIGHTING INTO SUCH A TYPEWRITER
US3720298A (en) * 1970-11-16 1973-03-13 Teletype Corp Prism alignment means for a character at a time printer
US4355914A (en) * 1980-05-01 1982-10-26 International Business Machines Corporation Acoustic hood with glare shield
CH636051A5 (en) * 1980-05-20 1983-05-13 Hermes Precisa International TYPEWRITER.
GB8607492D0 (en) * 1986-03-26 1986-04-30 Central Electr Generat Board Corrosion monitoring apparatus

Also Published As

Publication number Publication date
DE8520058U1 (en) 1985-08-22
WO1987000124A1 (en) 1987-01-15
US4813798A (en) 1989-03-21
EP0228425A1 (en) 1987-07-15
DE3674899D1 (en) 1990-11-15

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