How did the Schwenkfelders influence Montgomery County?

In the 1700's a small group of followers of Caspar Schwenckfeld von Ossig crossed the Atlantic Ocean and settled north of the city of Philadelphia. Who were these people and how did they influence the area in which they settled? In this podcast, Rev. Dr. Drake Williams, Minister of Mission and Theology at Central Schwenkfelder Church interviews his father Drake Williams, Board Member at the Schwenkfelder Library and Heritage Center in Pennsburg, PA.