DE278727C - - Google Patents

Info

Publication number
DE278727C
DE278727C DENDAT278727D DE278727DA DE278727C DE 278727 C DE278727 C DE 278727C DE NDAT278727 D DENDAT278727 D DE NDAT278727D DE 278727D A DE278727D A DE 278727DA DE 278727 C DE278727 C DE 278727C
Authority
DE
Germany
Prior art keywords
incombustible
bell
protective
electric hand
hand lamp
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
Application number
DENDAT278727D
Other languages
German (de)
Publication of DE278727C publication Critical patent/DE278727C/de
Active legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L14/00—Electric lighting devices without a self-contained power source, e.g. for mains connection
    • F21L14/02—Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L14/00—Electric lighting devices without a self-contained power source, e.g. for mains connection
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Insulating Bodies (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Bei elektrischen Handlampen, die in der Nähe spannungsführender Teile (hinter Schalttafeln, in Fernsprechämtern) gebraucht werden, dürfen äußerlich keine Metallteile, ebenso auch keine metallischen Schutzkörbe verwendet werden.In the case of electric hand lamps that are close to live parts (behind control panels, in telephone exchanges), no metal parts may be used on the outside, as well no metallic protective baskets are used either.

Eine Glasglocke allein würde zwar dieser Bedingung genügen, eignet sich aber in vielen Fällen nicht wegen ihrer Zerbrechlichkeit.
ίο Das Neue an der vorliegenden Erfindung besteht in der Verwendung eines durchsichtigen Isoliermaterials mit genügender Festigkeit zum Schutz der Glühlampe, welches jedoch bei mechanischen Beanspruchungen nicht zerbricht oder splittert und auch nicht brennbar ist.A bell jar on its own would meet this requirement, but in many cases it is unsuitable because of its fragility.
ίο What is new about the present invention is the use of a transparent insulating material with sufficient strength to protect the incandescent lamp, but which does not break or splinter under mechanical stress and is also non-flammable.

Ein Material, welches diese Eigenschaften und eine genügende Elastizität besitzt, ist in letzter Zeit in Form von unverbrennbarem Zelluloid hergestellt worden.A material that has these properties and sufficient elasticity is in recently made in the form of incombustible celluloid.

Die Zeichnung zeigt eine derartige Schutzglocke, welche zum Aufschrauben auf den Lampengriff mit einem eingepreßten Gewindering R versehen ist. Außerdem ist die Glocke mit Versteifungsringen S versehen, die ihr eine größere Festigkeit geben.The drawing shows such a protective bell, which is provided with a pressed-in threaded ring R for screwing onto the lamp handle. In addition, the bell is provided with stiffening rings S, which give it greater strength.

Eine derartige Handlampe würde, da sich die Glocke an der Befestigungsstelle abdichten läßt, auch für nasse Räume verwendet werden können.Such a hand lamp would, since the bell seal at the attachment point can also be used for wet rooms.

Claims (2)

Patent-Ansprüche:Patent Claims: 1. Elektrische Handlampe ohne äußere Metallteile, dadurch gekennzeichnet, daß an derselben anstatt des Schutzglases eine Schutzglocke aus elastischem, durchsichtigem, unverbrennbarem und nicht splitterndem Isoliermaterial (z. B. unverbrennbarem Zelluloid) angebracht ist.1. Electric hand lamp without external metal parts, characterized in that on the same instead of the protective glass a protective bell made of elastic, transparent, incombustible and non-splintering insulating material (e.g. incombustible celluloid) is attached. 2. Elektrische Handlampe nach Anspruch i, dadurch gekennzeichnet, daß in2. Electric hand lamp according to claim i, characterized in that in . die Schutzglocke ein Gewindering aus Metall eingepreßt ist.. the protective bell is pressed in by a threaded ring made of metal. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT278727D Active DE278727C (en)

Publications (1)

Publication Number Publication Date
DE278727C true DE278727C (en)

Family

ID=534701

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT278727D Active DE278727C (en)

Country Status (1)

Country Link
DE (1) DE278727C (en)

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