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#608918 01/05/22 12:45 PM
Joined: Jan 2006
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Sidelock
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Sidelock
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Stillman Taylor, Popular Mechanics, November 1915
https://books.google.com/books?id=td8DAAAAMBAJ&pg=PA784&lpg

Obviously not a Vic Venters quality study, but interesting.

Can anyone ID the maker? A 2 piece mainspring with a roller-bearing.

[Linked Image from photos.smugmug.com]

Tobin used a roller-bearing on the short arm of the mainspring

[Linked Image from photos.smugmug.com]

[Linked Image from photos.smugmug.com]

An illustration of what appears to be the Alexander Brown "Double Cross Bolted Treble Wedge Rib Extension", with an odd non-Smith lump. Did another U.S. maker use the rotary bolt?

[Linked Image from photos.smugmug.com]

[Linked Image from photos.smugmug.com]

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Sidelock
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Joined: Jan 2006
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Joined: Jan 2006
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Likes: 313
Sidelock
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Joined: Jan 2006
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Fox also used a "rotary bolt" linked to the top lever.

[Linked Image from photos.smugmug.com]

Ithaca Flues used an extension off of the top lever and an underbolt

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[Linked Image from photos.smugmug.com]

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Sidelock
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Stevens 311, 315 & 330 top lever with a hook that engaged the top rib extension

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Sidelock
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Crescent hammerless used a similar lock-up plus an under-bolt.

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Sidelock
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The Ithaca Lightning Lock was part of the Flues marketing
https://books.google.com/books?id=yR4AAAAAMAAJ&pg=PA53&lpg
The illustration however shows the early NID cocking indicators. Did the NID have a rotary bolt?

[Linked Image from photos.smugmug.com]

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Sidelock
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Drew, yes the NID joined the Smith and Fox with a rotary bolt. Smith did the best job fitting them. Capt. Askins and Elmer Keith both had issues with Fox and Ithaca guns popping open, no mention of it happening with Smith guns.


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