NL131903C - - Google Patents

Info

Publication number
NL131903C
NL131903C NL131903DA NL131903C NL 131903 C NL131903 C NL 131903C NL 131903D A NL131903D A NL 131903DA NL 131903 C NL131903 C NL 131903C
Authority
NL
Netherlands
Application number
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.)
Publication of NL131903C publication Critical patent/NL131903C/xx
Priority claimed from US701563A external-priority patent/US2994799A/en
Priority claimed from US701414A external-priority patent/US2979634A/en
Priority claimed from US707952A external-priority patent/US2980818A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters
NL131903D 1957-12-09 NL131903C (xx)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US701563A US2994799A (en) 1957-12-09 1957-12-09 Projection lamp
US701414A US2979634A (en) 1957-12-09 1957-12-09 Projection lamp
US707952A US2980818A (en) 1958-01-09 1958-01-09 Projection lamp

Publications (1)

Publication Number Publication Date
NL131903C true NL131903C (xx)

Family

ID=27418723

Family Applications (3)

Application Number Title Priority Date Filing Date
NL131903D NL131903C (xx) 1957-12-09
NL6600543A NL6600543A (xx) 1957-12-09 1966-01-14
NL6600542A NL6600542A (xx) 1957-12-09 1966-01-14

Family Applications After (2)

Application Number Title Priority Date Filing Date
NL6600543A NL6600543A (xx) 1957-12-09 1966-01-14
NL6600542A NL6600542A (xx) 1957-12-09 1966-01-14

Country Status (2)

Country Link
DE (1) DE1276927B (xx)
NL (3) NL6600543A (xx)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE271443C (xx) *
AT9231B (de) * 1900-04-21 1902-09-25 Samuel Dexter Waschburn Glühlampe mit im Inneren der Birne angeordnetem Reflector.
US1790086A (en) * 1925-11-06 1931-01-27 Edward W Boerstler Apparatus for projecting light rays
DE456203C (de) * 1926-12-09 1928-02-17 Patra Patent Treuhand Innenreflektor fuer elektrische Gluehlampen
US1961964A (en) * 1927-12-05 1934-06-05 Adiel Y Dodge Electric lamp
US1936854A (en) * 1932-04-12 1933-11-28 Rogers Radio Tubes Ltd Incandescent lamp
AT155704B (de) * 1936-03-14 1939-03-10 Andor Von Dani Elektrische Glühlampe mit Innenreflektor.
FR895877A (fr) * 1943-06-26 1945-02-06 Lampe de projection
US2795722A (en) * 1954-12-29 1957-06-11 Gen Electric Electric incandescent lamp

Also Published As

Publication number Publication date
NL6600543A (xx) 1966-04-25
NL6600542A (xx) 1966-04-25
DE1276927B (de) 1968-09-05

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