Sentence:  Next, the spring of the spell, at the end of which is a small brass cup to hold the knur, is adjusted by thumbscrews, so that when released by a touch of the <WSD>pommel</WSD> on the trigger, it will toss the knur a distance of six feet forward. 
Meaning of the word marked with <WSD> tags:  The (bat) used in the game of (knurr and spell) or (trap ball).