I have a set of table leaf hinges for sale. These were patented in 1873. I'm not sure when they were made or what table they belong to. They are missing one spring and one of the horizontal pieces. You can find more information on the patent and the design here: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/0137210. Please let me know if you have any questions.