1116. Counter/odometer, patent number 72,033, from the patent page:
This invention relates to a new and improved machine or apparatus for registering numbers applicable to odometers or measurements of quantities of all kinds, such as the numbers of barrels of flour, bushels of grain, or any other commodity that requires a tally or record of the quantity packed, stored, weighed, or handled in any manner, and applicable also to machinery of all kinds to register the revolutions of wheels decimally.
1117. Not sure what this tool is, since it has the same motion as number 1120, I think it's probably a valve lapping tool.
1118. According to the owner this is a fishing rod plane, used for making fishing poles.
1119. Scotchlok crimping tool, model E-9, series B, for use with Scotchlok electrical fasteners, as seen on this site.
1120. Valve lapping tool, used to help engine valves get a good seal so that compression is not lost.
1121. Part of a Lamson Air-Line cash carrying system, used in stores to send money, receipts, or paperwork from one area to another.
When I posted this spring compressor two years ago I didn't have the patent for it, but just the other night I used Google's patent search and found that it's number 1,614,218. They have some excellent drawings that show how this tool is used.
I also found that last week's leather creaser is patent number 31,094.
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Last week's set is seen below, click here to view the entire post:
Black Ops Pro Tips
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.