Swinden construction on only some OTs?

[Sword and Shield]

Until today, I thought all Old Timers used the Swinden construction- keyhole pin in a liner slot.

Yet, looking at a 3OT I got in a contest recently, I have an exception. I can clearly see the pivot pin on both sides. Is this a quirk of the lockbacks?

 

[Upstream]

Here is a list put together by Dale (orvet) some time ago.
http://www.bladeforums.com/forums/showpost.php?p=4796818&postcount=13
I don't exactly when they started using them maybe Dale or Michael will chime in.
On a side note, I remember reading that Buck stopped using Schrade for 300 series knives because the Swinden Key made them too difficult to change blades under warranty. Rick

 

[Codger_64]

I posted the patent in the referenced thread. Applied for in '60, issued in '61. That included most of the Old Timer traditional slip joints and Uncle Henrys (introduced in 1967). The lockbacks, I believe, are pinned in the traditional way without the keyhole construction.

Michael

http://patimg2.uspto.gov/.piw?docid...1=2977678.PN.%26OS=PN/2977678%26RS=PN/2977678

 

[rprocter]

in sketches in above patent link, am i correct that #34 is the Swinden keyhole, and #50 is the Swinden pin ? i tried to print this page, but it comes out without the sketches; because it's a patent ? thanks, roland

 

[Codger_64]

Copy it to your computer picture files, then size it, then print it.

 

[rprocter]

thanks Codge, i first came to blade forums not only to learn about knives, but because i had just gotten a computer and wanted to practise and learn to use it.
my educations continue.

 

[Codger_64]

in sketches in above patent link, am i correct that #34 is the Swinden keyhole, and #50 is the Swinden pin ? i tried to print this page, but it comes out without the sketches; because it's a patent ? thanks, roland

A better illustration of the pin is on page 3 of the drawings, #86. #50 is a hollow in the bolster allowing the pin to enter and slide into the slot #34.