1789. Equal Spacing Dividers for use by a draftsman, surveyor or map maker, these were marked "T. Alteneder, Phil'a", similar to patent number 3,271,869:



































1790. An asbestos shingle cutter, patent number 1,814,151:



Lifting the handle raises the upper half a few inches:
































1791. A curling stone:






















1792. A Mongolian Flint Fire Striker, it's made from very high carbon tool steel, and throws a good hot spark. There is a compartment inside for holding flint or tinder.


























1793. A riot shield for use by the police:





























1794. A nail driving device made to be used on tongue and grooved boards of hard wood floors, patent number 2,169,433:

Larger image



Larger image


































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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. Glenwood Gardens Park