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Simplicity was a strength of the [[Chilton]], the outer barrel was not even anchored to the nib assembly, as this was not necessary because for the mechanical precision of the machining it did not flow during use. The only drawback was that to work the pen required a longer nib assembly length to handle the pen once the body had been retracted for fillig, which had to be done with two hands. Since the thread for the cap was placed on the outer barrel of the pen (so that it was locked when the pen was closed), this also meant a longer cap length, and therefore an unproportionate appearance.

Simplicity was a strength of the [[Chilton]], the outer barrel was not even anchored to the nib assembly, as this was not necessary because for the mechanical precision of the machining it did not flow during use. The only drawback was that to work the pen required a longer nib assembly length to handle the pen once the body had been retracted for fillig, which had to be done with two hands. Since the thread for the cap was placed on the outer barrel of the pen (so that it was locked when the pen was closed), this also meant a longer cap length, and therefore an unproportionate appearance.

Per questo motivo nel 1927 venne creata una seconda versione del sistema di caricamento, in cui il fusto esterno era ancorato in maniera convenzionale al gruppo pennino, ed al suo posto veniva utilizzato per generare la depressione un secondo tubo metallico posto fra questo ed il fusto interno. Il sistema di depressione era ancorato al fondello della penna che costituiva un cappuccio cieco, in questo modo era sufficiente svitare il fondello della penna per effettuare il caricamento, che a questo punto poteva essere eseguito anche con una sola mano.

For this reason in 1927 was created a second version of the filling system, in which the outer barrel was anchored conventionally to the nib assembly, and in its place was used to generate depression a second metal tube placed between it and the inner barrel. The depression system was anchored to the bottom of the pen which was a blind cap, in this way it was sufficient to unscrew the bottom of the pen to perform the loading, which at this point could be performed with one hand.

La [[Chilton]] però non sembra essere l'unico produttore ad aver utilizzato questo sistema, infatti un sistema sostanzialmente identico denominato [[Compressor]] era stato inventato dalla [[Montblanc]] nel 1923 (brevetto {{Cite patent|DE|400356}}) ed utilizzato dal 1924 al 1929 per alcuni modelli, che però vennero commercializzati su scala ridotta (principalmente in Francia) e non riscossero un successo significativo.<noinclude>

La [[Chilton]] però non sembra essere l'unico produttore ad aver utilizzato questo sistema, infatti un sistema sostanzialmente identico denominato [[Compressor]] era stato inventato dalla [[Montblanc]] nel 1923 (brevetto {{Cite patent|DE|400356}}) ed utilizzato dal 1924 al 1929 per alcuni modelli, che però vennero commercializzati su scala ridotta (principalmente in Francia) e non riscossero un successo significativo.<noinclude>