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Trunnion

Definitions

  • Webster's Revised Unabridged Dictionary
    • Trunnion (Gun) A cylindrical projection on each side of a piece, whether gun, mortar, or howitzer, serving to support it on the cheeks of the carriage. See Illust. of Cannon.
    • Trunnion (Steam Engine) A gudgeon on each side of an oscillating steam cylinder, to support it. It is usually tubular, to convey steam.
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Century Dictionary and Cyclopedia
    • n trunnion One of the cylindrical projections on the sides of a cannon, cast or forged in one piece with the cannon itself, which support it on its carriage. In the United States artillery service the diameter of the trunnion in smooth-bore guns has generally been equal to the diameter of the bore. See cut under howitzer.
    • n trunnion In steam-engines, a hollow gudgeon on each side of an oscillating cylinder, which supports the cylinder, and through which steam is received and exhausted.
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Chambers's Twentieth Century Dictionary
    • n Trunnion trun′yun one of the knobs on each side of a gun, on which it rests on the carriage: in steam-engines, a hollow gudgeon on each side of an oscillating cylinder, serving as a support to it
    • ***

Etymology

Webster's Revised Unabridged Dictionary
OF. trognon, the stock, stump, or truck of a tree, F. trognon, a core, stalk, fr. tron, a trunk, stem. Cf. Trunk
Chambers's Twentieth Century Dictionary
Fr. trognon, a stalk—tronc, a stump—L. truncus.

Usage

In literature:

But Trunnion is quite inimitable: he is a child of humour and of the highest spirits, like Mr. Weller the elder.
"Adventures among Books" by Andrew Lang
In what station Commodore Trunnion did then serve in the British Navy?
"History of Friedrich II. of Prussia, Vol. XIV. (of XXI.) Frederick The Great--The Surrounding European War Does Not End--August, 1742-July, 1744" by Thomas Carlyle
Hawser Trunnion is not to be taught at this time of day how to lie his course, or keep his own reckoning.
"The Adventures of Peregrine Pickle, Volume I" by Tobias Smollett
By the worst of ill-luck, a shell which must have been fired practically at random had hit the gun just below the port trunnion.
"Diary of a U-Boat Commander" by Anonymous
The diameter of the trunnion bearings is 1 foot 2 inches, and the breadth of the trunnion bearings 5-1/2 inches.
"A Catechism of the Steam Engine" by John Bourne
The trunnions and flange couplings are of cast steel.
"Scientific American Supplement, Vol. XXI., No. 531, March 6, 1886" by Various
The air passes up through the center of the base, the pipe connecting with one of the hollow trunnions.
"Scientific American Supplement, No. 446, July 19, 1884" by Various
A box of the shape of a barrel has been used, it being trunnioned at the sides.
"Scientific American Supplement, No. 643, April 28, 1888" by Various
But he profited by his works, and the character of Uncle Toby reminds us considerably of Commodore Trunnion.
"History of English Humour, Vol. 2 (of 2)" by Alfred Guy Kingan L'Estrange
A trunnion-square of steel or iron for ascertaining the position of the trunnions, with reference to the axis of the bore.
"Ordnance Instructions for the United States Navy." by Bureau of Ordnance, USN
These in the latest constructed consist of a copper bath supported on a hollow pair of trunnions, so that it can be turned over if needed.
"The Dyeing of Woollen Fabrics" by Franklin Beech
And, if I mistake not," added he, "this is my old friend and staunch shipmate, Robert Trunnion.
"For Treasure Bound" by Harry Collingwood
The second struck gun carriage on left cheek, just in front of left trunnion and went into small fragments in every direction.
"A History of Lumsden's Battery, C.S.A." by George Little
We are held up by the failure of the people in Detroit to deliver trunnion bearings.
"Over Here" by Hector MacQuarrie
And, if I mistake not," added he, "this is my old friend and staunch shipmate, Robert Trunnion.
"The Secret of the Sands" by Harry Collingwood
Trunnion had then said he was only fooling, and that he did not mean anything by it.
"Mississippi Outlaws and the Detectives" by Allan Pinkerton
The guns often sank almost to the trunnions; many a time the infantry had to help elephants and bullocks to haul them out.
"The Red Year" by Louis Tracy
Coiled round the chase and jammed between the trunnion and the carriage was the end of the barbed wire.
"The Fight for Constantinople" by Percy F. Westerman
Do you remember how Trunnion's marriage was delayed?
"Hieroglyphics" by Arthur Machen
Sir Philip, however, was by no means one of the Trunnion class.
"Club Life of London, Vol. I (of 2)" by John Timbs
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In poetry:

He took a good aim at the bastion
Then said 'Right-o, Duke, let her fly.'
The cannon nigh jumped off her trunnions,
And up went the bastion, sky high.
"Sam's Christmas Pudding" by Marriott Edgar

In news:

Sawdust builds up on a table saw 's mechanical components, like the trunnion sector and worm gears, angle stops, and the mechanism that raises and lowers the blade.
The trunnion rests atop the southeast tower of the Interstate 5 Bridge's northbound span.
The 54-year-old trunnion has a half-inch crack.
The compact TR160Y dual-axis, trunnion rotary table from Haas Automation is designed to mount in the Y direction (front to back on the table) of a mid-sized VMC.
CNC may bring trunnion systems to a generation of contract manufacturers unfamiliar with this type of machine.
Solid ribbed cast-iron table with heavy-duty one-piece trunnion and 0-45° right tilting action for bevel cuts.
9 Next, the new trunnion is dropped in.
Prev Roller Rockers Install Trunnion Positioning.
Distributed by Koma, the Tsudakoma RT-111,AA drop-trunnion tilting rotary table features a design in which the top surface of the spindle is the center line of the tilt axis.
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