How-to-identify-old-door-locks, cleaning and repairing an antique mortise door lock: if you have an older house with knobs that slip, latches that are stuck inside the door, or other minor problems, then you should follow these instructions to remove the lock, dis-assemble it, clean and perform minor repairs.. Shop for-and learn about-antique and vintage locks and padlocks. the first locks were quite simple—a wooden beam that was slid across a door. this concept,..., we have an extensive collection of antique door locks and lock parts, more than shown on our site. we are working to add more of our inventory online each week. we have prepared several helpful resources for you to assist you in using antique door hardware with new and old doors, and to help find the correct parts for you to repair your broken locks.