GB390488A - Yellow screen for signalling purposes - Google Patents

Yellow screen for signalling purposes

Info

Publication number
GB390488A
GB390488A GB19115/31A GB1911531A GB390488A GB 390488 A GB390488 A GB 390488A GB 19115/31 A GB19115/31 A GB 19115/31A GB 1911531 A GB1911531 A GB 1911531A GB 390488 A GB390488 A GB 390488A
Authority
GB
United Kingdom
Prior art keywords
layers
signalling purposes
absorbing
yellow
yellow glass
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
GB19115/31A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Publication of GB390488A publication Critical patent/GB390488A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/226—Glass filters

Abstract

390,488. Colour filters. AVRIL, G., Saverne, Bas-Rhin, France. July 2, 1931, No. 19115. Convention date, Oct. 30, 1930. Void [Published under Sect. 91 of the Acts]. Drawings to Specification. [Class 97 (i).] A filter for absorbing red light, intended particularly for signalling purposes, consists of a yellow glass layer combined with one or more layers of green, blue, or white glass, the supplementary layers serving for absorbing the excessive red rays transmitted by the yellow glass. The several layers may be welded together or merely placed one above the other.
GB19115/31A 1930-10-30 1931-07-02 Yellow screen for signalling purposes Expired GB390488A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE390488X 1930-10-30

Publications (1)

Publication Number Publication Date
GB390488A true GB390488A (en) 1933-04-06

Family

ID=6374345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19115/31A Expired GB390488A (en) 1930-10-30 1931-07-02 Yellow screen for signalling purposes

Country Status (2)

Country Link
FR (1) FR390488A (en)
GB (1) GB390488A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381572A (en) * 1963-12-19 1968-05-07 Sidney B. Tuwiner Colorimetric testing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381572A (en) * 1963-12-19 1968-05-07 Sidney B. Tuwiner Colorimetric testing device

Also Published As

Publication number Publication date
FR390488A (en) 1908-10-06

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