Sam Salvati Posted July 7, 2012 Share Posted July 7, 2012 Is there no reason why a mechanical dupont/spring linkage would not work with an old style Bull hammer frame design? Quote Link to comment Share on other sites More sharing options...
ciladog Posted July 7, 2012 Share Posted July 7, 2012 Sam, I can’t see any advantage to adding a DuPont linkage to an old Bull design. A DuPont linkage works on mechanical hammers and the Bull is not a mechanical hammer.The DuPont linkage was designed to regulate the inertial travel and force of the tup where the stroke is always the same and the speed affects the inertia. So how does that work on an old style Bull where the stroke is what is regulated and speed is not? Quote Link to comment Share on other sites More sharing options...
macbruce Posted July 7, 2012 Share Posted July 7, 2012 Possible?..... sure, practicabe?..... maybe......... Quote Link to comment Share on other sites More sharing options...
Sam Salvati Posted July 7, 2012 Author Share Posted July 7, 2012 Craig, not talking about putting one between the ram and an air piston but making it completely non air. It's for sure a downgrade compared to the pneumatic controls, but I think it would allow for a short compact hammer with a small footprint. I know Jock Dempsey sort of casually thought about one, but using his poorly designed rear end drive and shock absorber linkage. Quote Link to comment Share on other sites More sharing options...
Sam Salvati Posted July 9, 2012 Author Share Posted July 9, 2012 I am talking about using the anvil, ram guide post and ram arrangement but using an inverted spring hammer linkage, not an air/mechanical linkage hybrid. Quote Link to comment Share on other sites More sharing options...
HWooldridge Posted September 11, 2012 Share Posted September 11, 2012 Vell, Samuel...du must posten der Picturen zo wir kann gesehen und commenten en zu Werk. Quote Link to comment Share on other sites More sharing options...
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