patent-digester, n. — Green’s Dictionary of Slang

patent-digester n.

[its supposedly beneficial effects on the digestion; ? corruption of Papin’s digester, a vessel designed for dissolving bones etc.]

brandy.

1836–7

Dickens Pickwick Papers (1999) 508: Ben [...] bring out the patent digester. Mr. Benjamin Allen [...] produced [...] a black bottle half full of brandy.