Set 520

For first time visitors I recommend this archive for some of my best posts.





Since Thursday is a holiday, my next post is scheduled for Friday, November 29.






3031. 3-1/2" tall:

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3032. 5" long, take a look at Neatorama for more guesses and a chance to win a T-shirt.



























3033. Around 5" long:





























3034. Sent in by a visitor who would like to find the purpose of these items:

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3035. Around 10" long:













































3036. This is something that most people have seen before:

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Answers:


3031. A World War II OSS issue sheet metal style caltrop, these were thrown from planes and were made to be used in sandy areas to puncture the tires of military vehicles.

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3032. This is a dental tooth key for use by a dentist to remove a tooth:



























3033. A 37P-4 glideslope antenna for providing guidance to a landing aircraft:





























3034. No answer yet for these two:

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3035. A Berrian gold and silver counterfeit coin detector, the length of this tool has been calibrated so that when the coin is placed in the appropriate slot, the device will tip over. If the coin does not tip the device then it is below the weight required. Patent number 187,936








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3036. This is a close-up view of the aluminum tip at the top of the Washington Monument:

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Are you interested in Old Tools and Tool Collecting? Want to learn more about tools, and meet some great people who have the same interests? Please take a minute to check out the Mid-West Tool Collectors Web Site at this link: www.mwtca.org.























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.

Set 519

For first time visitors I recommend this archive for some of my best posts.





3025. Approximately 12" long:

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3026. 4" long:

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3027. Around 6-1/2" long, take a look at Neatorama for more guesses and a chance to win a T-shirt.

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3028. 7" long:

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3029. 6" tall:

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3030. About 16" long:





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Answers:



3025. This is a braille slate for use with a stylus by blind persons to write text that they can read without assistance:

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3026. A cut-away view of an automatic lawn sprinkler:

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3027. This tool is for cutting off the top of the shell of a soft boiled egg:

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3028. This is a flooring clamp, patent number 201,709:

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3029. This is a Shapleigh Hardware vibrator that was probably part of the ignition system for an old Model T Ford:

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3030. A crossbow winder or cranequin, the two hooks pull back the bow string when the handle is turned:





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Are you interested in Old Tools and Tool Collecting? Want to learn more about tools, and meet some great people who have the same interests? Please take a minute to check out the Mid-West Tool Collectors Web Site at this link: www.mwtca.org.























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.

Set 518

For first time visitors I recommend this archive for some of my best posts.





3019. Sent in by a visitor who would like to find the purpose of this device, next to the scale are two glass tubes, text on it reads "James Howden & Co. Limited, Engineers, Glasgow":

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3020.

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3021. Approximately 4-1/2" long:




























3022. 18" diameter:

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3024. Around 16" long, take a look at Neatorama for more guesses and a chance to win a T-shirt.

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Answers:



3019. This is a manometer, it uses a column of liquid that will rise or fall until its weight is in equilibrium with the pressure differential between the two ends of the tube. It was most likely used for checking the flow of heating air through flues.

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The tubes are connected by the openings in the bottom part:

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3020. A planimeter, it can be used to determine the area of a two-dimensional shape:

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3021. These are broken key extractors, for use by locksmiths to remove keys that are broken off in locks:




























3022. This is a shelf that can be mounted on a stove pipe, it was made to be used as a drying rack or for keeping food warm:

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3023. This Stevens cab tire wrench twister was used on the wire inside of a solid rubber tire that was typically found on bicycles in the late 1800s, the ends of the wire were looped around each other and then twisted so they wouldn’t come apart.











































3024. This is a rounding plane that is dated 1801, it was used for preparing the ends of wooden axles:

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Are you interested in Old Tools and Tool Collecting? Want to learn more about tools, and meet some great people who have the same interests? Please take a minute to check out the Mid-West Tool Collectors Web Site at this link: www.mwtca.org.























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.