Hero of Alexandria, Pneumatica

Ναΐσκου κατασκευή, ὥστε θυσίας γινομένης τὰς θύρας αὐτομάτως ἀνοίγεσθαι, σβεσθείσης δὲ τῆς θυσίας πάλιν κλείεσθαι.

Construction of a small shrine such that, when a sacrifice is made, the doors open of their own accord, and when the sacrifice [fire] is put out, they close again.

Ἔνιοι ἐν τοῖς ἀγγείοις ἐμβαλλόμενοι σίφωνες ῥέουσιν, ἕως ἂν ἢ κενωθῇ τὰ ἀγγεῖα ἢ ἡ τοῦ ὕδατος ἐπιφάνεια γένηται κατὰ τὸ ἐκτὸς στόμιον | τοῦ σίφωνος· δέον ἔστω ῥέοντος αὐτοῦ, ὅτε βουλόμεθα, μηκέτι ῥέειν.

Some siphons placed in vessels go on flowing until either the vessels are emptied or the surface of the water comes level with the outer mouth of the siphon; let it be required that, while it is flowing, it should stop flowing whenever we wish.