1687. A French Sector, it has scales for lines of equal parts, polygons, lines of chords, metals, weights of shot and gun caliber, and was generally intended for gunnery calculations:
1688. A cigar clip for golfers, it can be clipped onto the bag or set on the green:
1689. A Shopsmith rip fence mounted featherboard, used by woodworkers to safely hold down workpieces:
1690. A heat sink from an old television, take a look at Neatorama for more guesses on this item.
Submitted by Willem Kossen
1691. A spoke auger, used to cut a round tenon on old style wooden wagon wheel spokes:
1692. A punch card emulator, the motor on the right side spins the drum, and the small black parts slotted into the drums raise the switches on top in the same sequence as the punched paper tape that the computer used to boot. It was used with a PDP 11 computer at Wright Patterson Air Force Base.
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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