Patents Assigned to H. Edward Tickel, Jr.
  • Rotary plug cylinder lock construction
    Patent number: 4008588
    Abstract: A key operated rotary plug cylinder lock having rotary disc tumblers with a concentric cylindrical boss on one face of each disc tumbler projecting axially into internesting relation into a complemental cylindrical well or recess in the confronting face of the next adjacent disc tumbler. A lock-out pin mechanism to lock the plug against rotation when excessive rearward stress is exerted thereon, and a frangible lost motion coupling between the tumblers and the shell portion of the plug breakable upon excess torquing forces are also provided.
    Type: Grant
    Filed: April 28, 1976
    Date of Patent: February 22, 1977
    Assignees: H. Edward Tickel, Jr., Harry C. Miller
    Inventors: Harry C. Miller, Herman Edward Tickel, Jr.