For many of his movies he also wrote the screenplay.
He joined the film business in 1903 and first realised numerous short movies of only few minutes each for Vitagraph.
The director and screen writer Joseph Delmont was born as Josef Pollak in Loiwein.
His last movies as a director came in the 20s.
From 1910 he realised longer movies for the cinema, often belonging to the genres adventure and action. At this point in time he began to use the pseudonym Joseph Delmont.