Friction Pin Locks

[OilyRascal]

There is a tool I'm attempting to date labeled "Chevrolet Brake Tool" that has a stated purpose of "Installing and Removing Friction Pin Lock".  Showing my age I presume, but I've not heard of a "friction pin lock" in brake systems.  I'd appreciate any education you may afford on friction pin locks or date ranges where friction pin locks were (or were not) in use.

[rusty]

Here's a 1950 tool....(So they were still using them then)

http://books.google.com/books?id=ydgDAAAAMBAJ&pg=PA224

(If I remember correctly, old chev brakes had opposed shoes instead of shoes with a common anchor pin. so the lead shoe has an anchor pin and a spring, and the trailing shoe has a seperate  pin and a spring, perhaps that is what they refer to as the friction pin? (One shoe was called the friction shoe, as it did most of the work),,,,,

[OilyRascal]

Here's a 1950 tool....(So they were still using them then)

It does seem to be the same tool I'm researching, but I see no maker reference in the "shopping" section of Popular Mechanics. 

A picture of the tool (and it's illustrations) I'm researching.

[Lostmind]

http://vcca.org/forum/ubbthreads.php/forum_summary

This is the Veteran Chevy Club site, they will be glad to give you more info then you need , LOL.
I believe it's a pivot pin that wears and sometimes seizes up.
The tool allows you to work on it with out taking all the brakes apart.

[john k]

Does that bring back memories, when in high school, working on my 1950 Chev four door.   Never knew about the tool, and took a pair of vise grips and two screwdrivers to muscle that spring off.