I am also looking for a Lounsbury listed as born in Ulster Co. NY in 1881. Haven't been able to find anything regarding his family background as yet. His name was Clarence and he married Mary Susan Long in Perry (Wyoming Co) in 1902. They had 3 children -- Clarice, Gilbert and Beulah. Mary Lounsbury later married Earl Latson in 1911, so I assume that means Clarence died before then.
Do you recognize Clarence as a descendant of your Joseph?