OptionalbridgeThe paper left standing between two slots of a chain. Slot and bridge are medians of their own and need not add up to the pitch.
OptionalnHow many pitches the median was taken over.
OptionalslotThe length along the roll of one slot of a chain.
The unit of measurement.
The measured value.
The pitch in the engineering sense: the distance along the roll from one punch of a chain to the next, which is the slot one firing cut together with the bridge of paper left before the next. It is taken on held notes, whose chains repeat it, as the median over them. It runs along the roll, and is another thing than the hole separation, which is the distance across the roll from one track to the next.
See
crm:E54 Dimension