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Par Lilorpetro sur lampes-a-pression.les-forums.com : Bonjour à tous,
La société Guenet & Abbat a été fondée à Paris en 1906. En 1909, elle a déposé son premier brevet : un brûleur à incandescence à mèche à essence/benzène, baptisé « Bec Abat ».
Comme de nombreux brûleurs à incandescence à essence/alcool similaires à cette époque, ce brûleur était équipé d'un filetage standard de 14 lignes (39,5 mm),
permettant ainsi de remplacer les anciens brûleurs à pétrole/kérosène, moins performants, par cette nouvelle lampe à incandescence.
L'intérêt de ce brûleur G&A réside dans sa conception technique, qui le distingue de la plupart des autres.
Ce type de brûleur à incandescence à mèche préchauffe le brûleur soit à l'aide d'une coupelle de préchauffage intégrée, soit d'une fourche en amiante avec de l'alcool.
Ce Bec Abat utilise une coupelle de préchauffage, mais la différence réside dans la distribution de la vapeur. Le combustible de la mèche aboutit dans une chambre à vapeur et,
normalement, la vapeur du combustible est directement acheminée vers le bec Bunsen via le gicleur.
Le Bec Abat distribue la vapeur via un petit tube fin vers une valve latérale coudée munie d'un bouton de réglage du jet.
De plus (et c'est là toute l'astuce), la vapeur est distribuée vers une partie semi-circulaire qui entoure la partie inférieure du brûleur.
Cette partie est percée de nombreux petits trous et, en mode allumage, constitue un élément chauffant supplémentaire.
Cela assure une chauffe constante du brûleur pour la production continue de vapeur.
Astucieux, mais je pense que cet élément chauffant supplémentaire réduit également légèrement la puissance de la flamme Bunsen d'origine.
En 1912, un deuxième brevet a été déposé et le brûleur a également été rebaptisé Bec Ramier.
Mon brûleur manquait de tête de bec Bunsen et d'un support de manteau ; sinon, il était en bon état.
Je ne connais que deux autres exemplaires de ce brûleur parmi les collectionneurs, ce qui le rend plutôt rare.
/Conny
1909/1912 Brevet ... 
Bec Ramier 1922 ....
1909 Trademark .... Bec-Abat 
