DE343680C - - Google Patents

Info

Publication number
DE343680C
DE343680C DE1919343680D DE343680DA DE343680C DE 343680 C DE343680 C DE 343680C DE 1919343680 D DE1919343680 D DE 1919343680D DE 343680D A DE343680D A DE 343680DA DE 343680 C DE343680 C DE 343680C
Authority
DE
Germany
Prior art keywords
reflector
thread
rays
light
parabolic
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
Application number
DE1919343680D
Other languages
German (de)
English (en)
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 filed Critical
Application granted granted Critical
Publication of DE343680C publication Critical patent/DE343680C/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
DE1919343680D 1917-05-12 1919-12-12 Expired DE343680C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US505970XA 1917-05-12 1917-05-12

Publications (1)

Publication Number Publication Date
DE343680C true DE343680C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1921-11-07

Family

ID=10252211

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1919343680D Expired DE343680C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1917-05-12 1919-12-12

Country Status (3)

Country Link
DE (1) DE343680C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR505970A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB157585A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
GB157585A (en) 1921-01-27
FR505970A (fr) 1920-08-11

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