Have you ever seen a wrench like this? [Patent Remake] @HandToolRescue

Uploaded July 2025 | Updated September 2026, 2 weeks ago

In this video I recreate and massively upscale a 1910 patent for wrench/spanner. You can view the original patent documents here: worldwide.espacenet.com/patent/search/family/033444316/publication/GB191007671A?q=GB191007671A

This wrench design is quite odd since it uses shims or blades that swing into or out of position in order for the user to adjust the wrench to he required size of the fastener.

I decided to make a much larger version of the original for this video. The wrench I made is 12" long and 3/8" thick of 4140 steel, and the shims are 1/16" wide and made of O1 tool steel. Both the wrench body and shims were heat treated and tempered to 52HRC. The most difficult aspects of remaking this wrench are making sure the back of the shims sit perfectly against the body of the wrench so that they line up perfectly parallel when in use, and making sure the shims and the gap of the wrench "mouth" are perfectly divisible by 16 so non-metric fasteners fit perfectly.

I'd like to thank @CRCAutoUS for sponsoring this video.

You can check out the products from them used in this video in the link below:
crcindustries.com/handtoolrescue

Wrenches, screwdrivers, and socket drivers are now for sale at handtoolrescue.com

Watch narrated videos and help secure more tools for future videos (if you want):
patreon.com/handtoolrescue

Have you ever seen a wrench like this? [Patent Remake]

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$The Fractal Chair I have recreated a fractal chair based off a patent from 1913. Similarly to the fractal vise that I previously restored, this chair uses the same series of pivoting sections to fully adapt to the shape of someone sitting down. The original patent can be seen here: https://patents.google.com/patent/US1059545 I used the original patent explanation as best I could to help design the function of the chair which uses stacked tongue and groove steel plates that interface with each other through a series of ball bearings that provide the movement. The design was fully realized with the help of https://www.instagram.com/joshsfick/ who digitally created all the pieces needed to be cut with a fibre laser. Once the sheets of 1/4 steel were cut, I could start machining and assembling all the other components. Overall the chair weighs about 150lbs. Sitting on the finished chair is odd. Its comfortable in how it conforms to you, but not comfortable to sit on wood slats that can sometimes be too far apart due to their movement. There is lots of room for improvement here. Slats that are less thick would help lower the pivot point of each, so that it feels better to sit on. More sections would also increase the comfort. Increasing the range of each section and making a version where the backrest could pivot as well would be very nice. Overall this was so much fun and I will constantly sit in it every time I get the chance. Wrenches, screwdrivers, and socket drivers are now for sale at www.handtoolrescue.com Help secure more tools for future videos (if you want): https://www.patreon.com/handtoolrescue Instagram: https://www.instagram.com/handtoolrescue Facebook Group - Share your restorations https://www.facebook.com/groups/handtoolrescue https://www.facebook.com/handtoolrescue/ Reddit - Share your restorations https://www.reddit.com/r/HandToolRescue/ Podcast (with @jimmydiresta and Andrew Alexander) - https://anchor.fm/fitzall$

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