Nick Posted February 22, 2014 Share Posted February 22, 2014 I found this little helve hammer while searching through Google Patents. The drive and linkage isn't really anything new, but I thought the frame was interesting. It's all angle iron, and riveted together. Perhaps a viable alternative for those witout easy access to a welder? It would be fairly easy to construct and modify. The idler pulley is also directly attached to the treadle, with no joints or pivoting levers. It's interesting that the anvil post is made to be easily dismounted in its entirety to be dressed. Here's a link to the patent, from 1926, for the full text. I recommend downloading the PDF, the scanned and converted text is pretty dire. http://www.google.com/patents/US1685447 Quote Link to comment Share on other sites More sharing options...
Geoff Keyes Posted February 22, 2014 Share Posted February 22, 2014 This is very close to the linkage that was used in the junkyard hammer build. If you search Youtube for "Original Junkyard Hammer", you'll find a video. Geoff Quote Link to comment Share on other sites More sharing options...
Stormcrow Posted February 25, 2014 Share Posted February 25, 2014 Quote Link to comment Share on other sites More sharing options...
mofokaye Posted February 26, 2014 Share Posted February 26, 2014 Very similar to one I built years ago. The design works! Quote Link to comment Share on other sites More sharing options...
Eddie Mullins Posted February 26, 2014 Share Posted February 26, 2014 Thanks for the link / info. I haven't thought to search patents. I hope to build something by years end. Quote Link to comment Share on other sites More sharing options...
mofokaye Posted February 27, 2014 Share Posted February 27, 2014 It's surprisingly easy to make something that'll save you a lot of time, and helve hammers are probably the easiest option. Guided helves are more functional, but require a bit more work. Trawling these old patents is a great source of inspiration (Although how many of them were ever actually built and tested is unclear) Quote Link to comment Share on other sites More sharing options...
Nick Posted February 28, 2014 Author Share Posted February 28, 2014 There are a couple patents I've seen that I'm pretty sure (or at least hope) were never built. This one seems more likely to have been, but it's very small compared to your average Hawkeye, Bradley, Little Giant, etc. I like the spring arrangement, but I would be concerned about the stock hitting the pitman. That's less of a conern with a longer helve, but with a little one you'd have to split it like Mofokaye's above. Quote Link to comment Share on other sites More sharing options...
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