EP 0470002 A1 19920205 - Miniature light bulb and its method of manufacture.
Title (en)
Miniature light bulb and its method of manufacture.
Title (de)
Miniatur-Birne und ihre Herstellungstechnik.
Title (fr)
Ampoule électrique miniature et sa technique de fabrication.
Publication
Application
Priority
FR 9009906 A 19900802
Abstract (en)
Method of manufacture of an electric light bulb (1) operating by incandescence characterised by the fact that: - one starts with a blank (10) bulb of generally "mushroom" shape having a diameter which can be as low as or close to about 25 mm; - the inner face of the rear half (13) of the flared part of the blank (10) is substantially metallised; - one starts with a foot (6) provided with a plurality of supports (7) for a filament (8) and a support is folded in two into a V and the supports are bent at their base in two opposite directions, the filament being inserted in an envelope having the general form of a truncated cone; - the foot is sealed on (6); - the air in the bulb is pumped out (1); - a base cap is sealed on (3). <IMAGE>
Abstract (fr)
Procédé de fabrication d'une ampoule électrique (1) fonctionnant par incandescence caractérisé par le fait que : on part d'une ébauche (10) d'ampoule de forme générale "champignon" ayant un diamètre pouvant descendre ou être voisin de 25 mm environ ; on métallise substantiellement la face interne de la moitié arrière (13) de la partie renflée de l'ébauche (10); on part d'un pied (6) pourvu d'une pluralité de supports (7) pour un filament (8) et on cambre en V un support sur deux et on plie les supports à leur base dans deux sens opposés, le filament s'inscrivant dans une enveloppe en forme générale de tronc de cône ; on scelle le pied (6); on pompe l'air se trouvant dans l'ampoule (1); on scelle un culot (3). <IMAGE>
IPC 1-7
IPC 8 full level
H01K 3/00 (2006.01)
CPC (source: EP)
H01K 3/005 (2013.01)
Citation (search report)
- [AD] US 3837371 A 19740924 - ROCHET J
- [A] CH 155263 A 19320615 - BORNAND EMILE [CH], et al
- [A] EP 0220780 A1 19870506 - PHILIPS NV [NL]
- [A] US 4287231 A 19810901 - DECARO ARISTIDE R, et al
- [A] BE 370474 A
- [A] EP 0358273 A1 19900314 - PHILIPS NV [NL]
- [A] US 2916396 A 19591208 - PERRENOD CHARLES A
- [A] DE 892184 C 19531005 - GEN ELECTRIC
- [A] PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS vol. 177, no. 24, 1963, LONDON pages 639 - 659; GARDINER ET AL.: 'Machines for electric lamp manufacture '
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0470002 A1 19920205; FR 2665573 A1 19920207; FR 2665573 B1 19921023
DOCDB simple family (application)
EP 91402161 A 19910801; FR 9009906 A 19900802