2245. 19" long:
2246. 16" long, sent in by a visitor who is looking to find the purpose for this item:
2247. 9" long:
This is a clue for the purpose the the tool seen above.
2248. 32" long, take a look at Neatorama for more guesses on this device and a chance to win a T-shirt:
2249. 7" long:
2250. 29" long:
The case for it:
2245. An Apollo Lunar Sample Return Container (ALSRC),
...an aluminum box with a triple seal manufactured by the Nuclear Division of Union Carbide. It was used on Apollo lunar landing missions to preserve a lunar-like vacuum around the samples and protect them from the shock environment of the return flight to earth. An aluminum mesh liner helped absorb impacts.
2246. No answer yet for this one, looks like it could be used to pull a heavy load by attaching a rope to the center part:
2247. A spreader used to tighten the twist when making rope, it's slid along the length of the stands during the twisting action to force the formation of a tight and constant spiral.
This is a rope winder, its design would have allowed it to be used while placed on a fence or a wagon sideboard.
2248. These are lunar tongs for use by an astronaut for picking up moon rocks:
2249. A fisherman's hook remover:
2250. A 201-Z Gas Gun for dispersing riots, it can fire:
-No. 112 Spedeheat Grenade
-No. 206 Spedeheat Projectiles
-No. 203 Short Rang Cartridges
-No. 230 Flite-Rite Projectiles
I own a lot of different tool books but the one that I use first as a reference is the Dictionary of American Hand Tools: A Pictorial Synopsis (Schiffer Book for Collectors)
It has over 4,500 images and is a great book for learning about about a wide variety of tools. This book gets my highest recommendation.
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Last week's set is seen below, click here to view the entire post.
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.