Top lever filler
The bottom lever filler, also called rear lever filler, is a special lever filling system designed by Aurora and used from around 1930 for the International model, and later used also on the Novum. There are no known variants of this system used by other manufacturers, even if there are several patents with similar mechanisms, except the switch filler of the Pilot, which has some similarities, in particular with the variant of this system adopted later on the Superna model.
In essence the bottom lever filler creates a sort of combination between the principle of the lever and the mechanism used in the button filler. In this case the lever is very short and positioned on a slot made on the bottom of the pen, the lever must be raised from its resting position, in which it is folded inside the bottom, and at that point pushing it further you go to operate an internal pressure bar similar to those used in the button filler, which arching compresses the sac.
The system is rather complex and delicate (given the small size of the lever the efforts to be applied are greater), and to avoid deforming the body of the pen Aurora inserted a reinforcement inside the same (made with a thin metal cylinder of aluminum inserted on the inner surface) that further reduces the space available for the sac.
The mechanism allows to avoid the presence of the blind cap of the button filler, and the related problems of loss, at the cost of a certain mechanical complexity. Its main purpose, apart from distinguishing itself from other manufacturers, however, it is mainly to aesthetically pleasing avoiding a gap on one side of the pen.
Una variante del sistema, introdotta sempre dall'Aurora con il modello Superna, prevede il montaggio della levetta di fondo in posizione verticale; la levetta viene montata all'interno di una struttura in alluminio inserita sul fondo della penna, che si cura di assorbire gli sforzi. La levetta emerge da una cupola a forma semisferica e può essere azionata tramite una pallina di plastica posta sulla estremità esterna. In questo caso si accede al meccanismo svitando il fondello e si carica la penna spingendo la leva tramite la pallina.
Brevetti correlati
- Brevetto n° GB-273357, del 1927-06-07, richiesto il 1926-02-05, di Lionel Gunsberg, Emanuel Feldorf, Lang - Curzon - Summit, W. J. May and Co.. Caricamento top lever filler.
- Brevetto n° FR-628272, del 1927-06-07, richiesto il 1926-02-05, di Lionel Gunsberg, Emanuel Feldorf, Lang - Curzon - Summit, W. J. May and Co.. Caricamento top lever filler.
- Brevetto n° GB-297194, del 1928-09-20, richiesto il 1927-08-06, di Arthur Stanley Jones, Conway Stewart. Sistema di caricamento.
- Brevetto n° US-1733780, del 1929-10-29, richiesto il 1927-05-14, di Frank C. Deli, William D. Groseclose, Autopoint. Sistema di caricamento.
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