The contacts vary in number, but my own, single circuit contacts are shown here. Multiple contacts were supplied, to order, by Gents. To allow individual bell ringing circuits. Perhaps for use in different areas of a building or complex.
The lower set are situated left of the centre of the movement. They are actuated by a cam and offer weekend silencing. Or any other silencing period with a suitable cam. Slots in the day of the week wheel allows some adjustment by loosening the visible screws.
contacts are normally CLOSED. If they are open then the bell system is silenced.