Designs for a water clock that strikes the hours

Timing the 23rd and 24th hours

At the 23rd hour the first basin is opened to receive two hours' water and let it out over two hours without striking, then in the second hour it strikes the first hour. This avoids interrupting the count, since the first hour begins the instant the 24 hours strike.

The last hour reopens the source

When 24 hours have struck, the same water leaves the basin and opens the original conduit, that is the source that fills the first basin. When all the basins are full, the original source of water is shut off.

The distributing vessel m

Labelled n, m. Vessel m sits a quarter-braccio above the basins' mouths and holds about a boccale so it is light to turn. When the first hour's basin is full it swivels m to feed all the basins at once; once they are full the surplus water channels under m and turns it clear of every basin until the 24-hour water returns it to the first vessel.

A screw-raised float redirects the spout

Labelled m. The small one-boccale vessel is turned by the 24 hours to fill only itself; when full, a float rising on a screw turns the spout to fill the other 23 basins. When those are full the rising float turns the water-giver away from each vessel until the 24 hours strike and return it to the first place.

A revolving motion on a plane without wheel or teeth

A figure above the others poses a mechanical problem: to obtain a revolving motion on a plane without any wheel or gear teeth.

In alto.

Verso il centro: Le ... Probabile visione d'insieme dell'apparecchio, oltre il quale:

A destra, sistema di bottini:

Particolare dello strumento:

Figura analoga, con:

In basso, strumento, con:

Figura sopra la precedente:

Figura con:

At the top.

Toward the centre: 'The...'. Probable overall view of the apparatus, beyond which:

On the right, a system of basins:

Detail of the instrument:

A similar figure, with:

At the bottom, an instrument, with:

Figure above the preceding one:

Figure with: