Calum,
Since we are going in depth into the Lawrence Pellet Primer on this link, I thought I'd add the one you provided 5 years ago featuring the original patent filed by Sharps Engineer and inventor, Richard Lawrence. On April 12, 1859, Lawrence received Patent number 23, 590 for his
Self-Priming Gunlock.Christian Sharps invented the pellet priming system, whereas Richard Lawrence's patent adds the 'cut off' system. This allowed pellets to be stored in the magazine until needed, and when activated, be used in place of the musket cap. Lawrence's 'improved' pellet priming system was featured on all of the New Model 1859-1863 Improved Sharps rifles and carbines.
For those who have not read the patent application before, Richard Lawrence provides a highly detailed diagram of the lock plate showing the primer system components; as well as a excellent description on how it functions.
http://www.berdansharpshooters.com/Primer_Patent.pdfBill Skillman
Hudson Squad Mess