Fred Connell
Student Blacksmith
Power Hammer
Whack Whack Calm
   Notes & Photos:
- Power Hammer
- Power Hammer closeup
- Anvil
- Frame
- Hammer
- Dies
- Hammer Track
- Dupont Linkage
- Linkage Compressed
- Clutch
- Clutch Linkage
- Clutch Foot Petal
- Crankshaft
- crankshaft assembled
- Motor & mount
- Dupont Linkage Patent
- Operation Conclusions
- Operating Video .ogg
- Back toBlacksmith

   Other Stuff:
- Rose Engine

powerhammer2.jpg 640x934- 139k
Fred Connell - Blacksmith
Power Hammer Dupont Linkage

The Dupont linkage has oiled bronze bushings for each end of the upper and lower arms. Each of these have a grease fitting.

The spring retainer welded on the center of the spring rod keeps the spring rod centered in the Dupont linkage. The spring rod passes through oiled bronze bushings in each of the spring end pivots. The spring end pivot rotates in the upper linkage arm as the Dupont linkage cycles through it's motion allowing the springs to stay straight. Since the spring rod passes through both springs any broken springs would be retained on the rod. In fact if a spring broke, the Dupont linkage would still operate.

This Dupont linkage is designed so that the springs cannot be compressed more than their specified maximum operating compression. The springs chosen have a longer range of operating compression than most and should give a very long life.

1x3 bar_rust.gif
Rose Engine Rose Engine barleycorn design barley10.jpg 65x65-2.7k