Definitions
from The Century Dictionary.
- noun In ship-building, a piece of timber let in horizontally between two frames, to form the upper or lower side of a port.
Etymologies
Sorry, no etymologies found.
Examples
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One end of a tripping-line is fastened to the middle of the toggle, and the other to the breeching-bolt in the side of the ship; by this arrangement the toggle is tripped from its place at the commencement of the recoil, and the muzzle is raised so as to clear the port-sill by the preponderance of the breech.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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Hook the garnet and haul it taut, so as to raise the breech of the gun as much as the port-sill will permit; hook or toggle the gun-purchase, and sway away.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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Height of securing-bolt (side-tackle bolt) above port-sill 8. 8.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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When home, the men run the gun out as quickly as possible; the Captain of the gun clears the vent, primes in running out, points and fires in the usual manner, but as rapidly as is consistent with a good aim, taking care that the muzzle is clear of the port-sill, and on lower decks that the port is triced up clear of the explosion.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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For IX-in. guns, the port-sill should not be less than 20 inches in height, and no port-sill less than 16 inches; otherwise, the carriages will not give sufficient elevation, and the position of the Gun
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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Bring the gun under the yard and sling it as follows: place one bight of the slings under the neck of the cascabel, and pass the lashing which is attached to the slings round the chase, at such a distance from the trunnions as will allow them to go into the trunnion-holes without bringing too great a pressure of the slings against the upper port-sill.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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When the breech of the gun is above the port-sill, hook the garnet and the thwart-ship-tackle to the cascabel, and bowse on both.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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Thus fitted, when the gun is run in and levelled, breechings must be long enough to allow the muzzle of the gun to come a foot inside of the upper port-sill, if the breadth of the vessel will allow it.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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When the slings bear hard on the upper port-sill, lower the gun-purchase, and bowse on the garnet until the breech is high enough for the trunnions to clear the cap-square bolts in the carriage; then bowse on the thwart-ship-tackle until the trunnions are over the trunnion-holes, lowering the purchase as required to bring the gun into its place.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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The Handspikemen raise the breech to free the quoin; the 2d Captain withdraws it and the bed; the Handspikemen lower the breech upon the axletree, so that in case the gun should break adrift, the muzzle will take the upper port-sill; and the Port-tacklemen lower the port-lid.
Ordnance Instructions for the United States Navy. 1866. Fourth edition.
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