GB376122A - Improvements in and relating to electric lamp bulbs and luminescent discharge tubes,and process for manufacture thereof - Google Patents

Improvements in and relating to electric lamp bulbs and luminescent discharge tubes,and process for manufacture thereof

Info

Publication number
GB376122A
GB376122A GB29031/31A GB2903131A GB376122A GB 376122 A GB376122 A GB 376122A GB 29031/31 A GB29031/31 A GB 29031/31A GB 2903131 A GB2903131 A GB 2903131A GB 376122 A GB376122 A GB 376122A
Authority
GB
United Kingdom
Prior art keywords
copper
aqueous solution
coating
silver
electric 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.)
Expired
Application number
GB29031/31A
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.)
COSIMO CONOCE
THEODORE CONOCE
Original Assignee
COSIMO CONOCE
THEODORE CONOCE
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 COSIMO CONOCE, THEODORE CONOCE filed Critical COSIMO CONOCE
Publication of GB376122A publication Critical patent/GB376122A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings

Abstract

376,122. Electric lamps. CONOCE, C. and CONOCE, T., 23, Boulevard Anspach, Brussels. Oct. 19, 1931, No. 29031. Convention date, Aug. 11. [Class 39 (ii).] Bulbs.-In producing a reflecting coating of silver upon a part of the external surface of an electric lamp bulb or luminescent discharge tube and protecting the silver in known manner with a second coating of copper or other metal, this second coating is applied electrolytically. In an example the bulb is washed in a dilute solution of stannous chloride, rinsed in distilled water, dipped for 2-5 minutes at 18-25‹ C. in a silvering bath, dried, rinsed and copper-plated using a voltage of about 5, the silvered surface constituting one electrode. The silvering bath is prepared by mixing a solution, obtained by adding sugar to a boiled aqueous solution containing sulphuric acid and alcohol and boiling again, with a solution obtained by adding an aqueous solution of sodium hydroxide to an aqueous solution containing ammoniacal silver nitrate. The electrolyte for the copper plating is prepared from copper sulphate, sodium hydroxide, and seignette salt.
GB29031/31A 1931-08-11 1931-10-19 Improvements in and relating to electric lamp bulbs and luminescent discharge tubes,and process for manufacture thereof Expired GB376122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE376122X 1931-08-11

Publications (1)

Publication Number Publication Date
GB376122A true GB376122A (en) 1932-07-07

Family

ID=3868642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29031/31A Expired GB376122A (en) 1931-08-11 1931-10-19 Improvements in and relating to electric lamp bulbs and luminescent discharge tubes,and process for manufacture thereof

Country Status (2)

Country Link
FR (1) FR726568A (en)
GB (1) GB376122A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493170A (en) * 1994-09-09 1996-02-20 Philips Electronics North America Corporation High efficiency sealed beam reflector lamp
US5789847A (en) * 1994-09-09 1998-08-04 Philips Electronics North America Corporation High efficiency sealed beam reflector lamp with reflective surface of heat treated silver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493170A (en) * 1994-09-09 1996-02-20 Philips Electronics North America Corporation High efficiency sealed beam reflector lamp
US5789847A (en) * 1994-09-09 1998-08-04 Philips Electronics North America Corporation High efficiency sealed beam reflector lamp with reflective surface of heat treated silver

Also Published As

Publication number Publication date
FR726568A (en) 1932-05-31

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