Set 471

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2737. Around 14" long:



























2738. 6" long:

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2739. 4" long, take a look at Neatorama for more guesses and a chance to win a T-shirt:

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2740. Sent in by a visitor:






























2741.

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2742. 9" tall:




























Answers:


2737. Model 24 Stielhandgranate, also called a German stick grenade or potato masher:




"A pull cord ran down the hollow handle from the detonator within the explosive head, terminating in a porcelain ball held in place by a detachable base closing cap. To use the grenade, the base cap was unscrewed, permitting the ball and cord to fall out. Pulling the cord dragged a roughened steel rod through the igniter causing it to flare-up and start the five-second fuse burning. This allowed the grenade to be hung from fences to prevent them from being climbed; any disturbance to the dangling grenade would cause it to fall and ignite the fuse."

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2738. This is an envelope sealer, patent number 1,495,147:

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2739. This is a horn shark's egg, the spiral-flanged shape allows it to be secured within crevices.

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2740. A harness maker's bench, the clamp is operated by the foot pedal:






























2741. A microtome for slicing samples for microscope slides, a video demonstration of this device can be seen here.

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2742. An automatic time stamp for office use, it could stamp both the date and time on a document:




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Update:


Someone found the patent for these items from last week, it turns out that they are pipe joint runners.

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When connecting two sections of pipe the conventional practice was to insert the small end of one into the bell end of an adjoining section and after oakum was caulked in the joint, molten lead was poured in to keep the oakum in place and form an effective metal seal. These items were used as a barrier to retain the molten metal until it solidified, they also provided a spout or runner through which the molten metal could be poured in the bell, patent number 2,501,484.







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To submit photos, send them to the address in my profile, please include dimensions, any text on the item, and where it was found.




















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.