That mysterious unknown socket

[Mick56]

Fit something like this

 

[ChevyEFI]

The PN seems partially comprised of a format we've all seen before from a manufacturer. Maybe the 41 means year or something and the 155 means a particular thing.

 

[WWheeler]

By loosening the set screw can the curved slot be removed?

Still scratching my head what they could be for. Perhaps some niche industrial or military application.

 

[Tom "Python" Aycock]

By loosening the set screw can the curved slot be removed?

Still scratching my head what they could be for. Perhaps some niche industrial or military application.

They were in an old man's shop. He had a lot of mechanic stuff. Lot of AMMCO brake lathe and cylinder honing tools...these were stored in that area. He also had some extensive woodworking tools and such but that was a different room in his shop. I'll take a closer view at these unicorns tomorrow and see what that set screw actually does.

By loosening the set screw can the curved slot be removed?

Still scratching my head what they could be for. Perhaps some niche industrial or military application.

 

[Tom "Python" Aycock]

They were in an old man's shop. He had a lot of mechanic stuff. Lot of AMMCO brake lathe and cylinder honing tools...these were stored in that area. He also had some extensive woodworking tools and such but that was a different room in his shop. I'll take a closer view at these unicorns tomorrow and see what that set screw actually does.

OK, so they do have a set screw. The working "blade" can be removed but when "in place" it is at one elevation (position) only for whatever its working purpose. So, not an adjustable drag link socket. Oddly enough I found another set on Worthpoint, one of these boogers mixed in with a New Britain drag link socket and some spark plug sockets so whatever it does, it's in the drag link socket world. One of them seems to have a circle H symbol, perhaps Hinsdale?

 

[four.cycle]

Hinsdale logo:

 

[Tom "Python" Aycock]

A couple of finds at the south Florida flea market yesterday.

First is a 4 3/4" long forward slant knurled cross bar and, of course, unbranded. The diameter indicates at least a 3/8 drive flex handle that it would pair with. I'm currently on the road so don't have any to match it with.

Second is a 1/2" to 1/2" drive coupler that is unbranded and just has a diminished 1/2 marking on it. I'm guessing this may be a Stevens Walden product as that's all I'm really familiar with having the double sided male extensions during a certain timeframe. It has a diamond pattern knurling so I'm hoping one of you has something similar?

 

[lbhsbz]

They were in an old man's shop. He had a lot of mechanic stuff. Lot of AMMCO brake lathe and cylinder honing tools...these were stored in that area. He also had some extensive woodworking tools and such but that was a different room in his shop. I'll take a closer view at these unicorns tomorrow and see what that set screw actually does.

If he was a brake guy, then one of those with the rounded blade might be to remove the rear plug on old Girling Triumph TR3/TR4 calipers....

I imagine there are a lot more older things that used plugs of this type (the ones that we normally use a coin to remove), I've just never seen one

 

[Tom "Python" Aycock]

Here's a new one. Unbranded. Heavy steel, 1/2" drive 1/2" 12 pt socket, knurled diamond pattern at the very bottom, tapered. Thinking possibly SW but I don't remember seeing anything like this one? Thoughts anyone?

 

[four.cycle]

1/2" to 1/2" drive coupler that is unbranded and just has a diminished 1/2 marking on it

drain plug socket for a 1/2" square drive ratchet, maybe?
knurling looks kinda-sorta New Britain-ish

that last one - I have NO clue. that is odd.

 

[3baygarage]

Looks

Here's a new one. Unbranded. Heavy steel, 1/2" drive 1/2" 12 pt socket, knurled diamond pattern at the very bottom, tapered. Thinking possibly SW but I don't remember seeing anything like this one? Thoughts anyone?

Looks like Chrome X Quality made by Duro/Indestro.

 

[four.cycle]

Looks like Chrome X Quality made by Duro/Indestro.

 

[john.k]

the curved blade type tools are for grinding engine valves with a curved slot in the head for grinding

 

[Copymutt]

The internal machining appears as one solid piece with a lot of intricate design inside. The inside and outside is very symmetrical and not indicative of any welding. It's a really nicely machined socket. Being absent of a makers ID is a shame even if it was labeled Fred's machine works...at least then I'd know it was custom.

I don’t have a clue, but you get a vote for the cleanest hands on Garage Journal.