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1760. A scriber for marking parallel lines in linoleum or other material so that inlay strips may be inserted, patent number 2,553,812.
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1761. A circular saw blade holder, the small pieces on the back fit into a peg board, if you want to place it on a regular wall, you can cut off the back pieces and attach it with screws using the two slots on the sides.
1762. Levels that are mounted in a jetway, used for lining up the jet bridge with different types of aircraft:
1763. A policeman's blackjack or sap, for striking miscreants on the head, this was on display with a pair of handcuffs and a different type of blackjack that looked like a small club.
1764. A bell jar for use in a laboratory, it's placed on a base which is vented to a hose fitting, which can be connected via a hose to a vacuum pump. By pumping the air out of the bell jar, a vacuum is formed.
To submit photos, send them to the address in my profile.
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. Glenwood Gardens Park
