Each owner, lessee or occupant of a factory or other building included within the provisions of this chapter, or owning or controlling the use of any room in such building, shall, for the violation of any provision of § 31-42, or for obstructing or hindering the commissioner or the commissioner’s deputies in carrying out the duties imposed on them by law, be fined not more than fifty dollars; but no prosecution shall be brought for any such violation until four weeks after notice has been given by the commissioner to such owner, lessee or occupant of any changes necessary to be made to comply with the provisions of said sections, and not then if, in the meantime, such changes have been made in accordance with such notification. Nothing herein shall limit the right of a person injured to bring an action to recover damages.