Hello to USA,
wanted to let you know Schweissweiler is a small village 5 miles from Winnweiler and belonged to Bavaria to the time around 1850. The place who is able to help you is the registration office of Winnweiler (not the church office).
I live in that area of Palatinate and try to help Americans in contacting their German relatives. If you are interested in my help so let me know.
greetings from the Palatinate in Germany
Anita Gillmann