Acquired a fascinating James Woodward & Sons 12b Hammergun recently. Engraving is crisp and Damascus barrels have a beautiful pattern but what is really interesting is the very rare bolting system.
I can't find any reference to the patent although the breech face is engraved 'Woodward Patent'.
Essentially it is a scissor action bolt, pivoted in the bar of the action and operated by an underlever with two projections which cam the 'scissor blades' apart to release the barrels. The 'blades' lock into slots cut into the single, long lump. There is a 'hold-open' spring lying between the 'blades' to make it possible to close the gun without having to cam the 'blades' apart.
The 1st photo shows the parts laid out. Note the pivot holes in the action flats. The 'blades' are the same way up as the barrels, opposite to the action.
2nd photo shows the 'blades' engaged with the barrel lump.
3rd photo shows the 'blades' fitted and in locked position.
Last photo shows 'blades' in open position with 'hold-open' spring visible between.