What is it? Set 431

"Rob H." scribbled:

is it used in a gas chamber?

Nope, it's not related to a gas chamber.

Not exactly correct but you're close, there are explosives involved.

Thanks for doing these. They're always interesting. Karl

You're both correct, it's a clamp and a trimmer, we didn't have a tool like this so instead would just use sandpaper to flatten the end of the cue.

No proof yet for the first item but the rest have all been identified this week, the answers can be seen here:

Rob

"> 2497) I first have to ask a question: Does the metal

The metal piece doesn't come out, we removed the screw at the large end but the metal part was still held by the smaller pin.

I have a close-up of it that I forgot to post, it can be seen here:

The large image of it that was posted on the web site:

From Rob's answers:

2502. This tool is an Alidade, a device that allows one to sight a distant object and use the line of sight to perform a task. This task can be, for example, to draw a line on a plane table in the direction of the object or to measure the angle to the object from some reference point. Angles measured can be horizontal, vertical or in any chosen plane. The alidade's primary use is for creating maps in the horizontal plane.

I actually thought of that based upon the ends (which reminded me of the

2 pieces of rifle's sight), but I couldn't account for the 3 clips on the base. Is there something extra there?

Bill

Only one of them (the center one) is a clip, to keep it closed when not in use.

The other two are link arms which pivot on the main base and the narrower part beside it, allowing it to move out from the side while retaining a state of being parallel to the main one. (The four parts form a parallelogram.)

Enjoy, DoN.

DoN, I "see it" now. Thank you for explaining!

2497 Another guess, it reminds me of the lever used on recliners to move the foot-rest up/down.

I tried searching on/for that idea, but couldn't come up with anything solid. Some examples, like this newer patent shows that a square shaft is sometimes used in the mechanism:

It appears to be old though, not sure when they started making recliners that used a side-arm mechanism like in that patent...