Delaware County Court elected Chad F. Kenny as its new president judge Thursday.Kenny, 56, was elected by the 20-judge court to replace Joseph P. Cronin Jr., who announced in April that he would retire. Cronin was elected to the position in 2008. As president judge, Kenny will take over the administrative duties of the court and will sit in Orphans Court. He will oversee 11 judicial departments and a staff of 725 employees.