Crossword Puzzle Medieval security device

Clue: Medieval security device

Medieval security devices (MOATS with 5 letters)
Security device (e.g. ALARM with 5 letters)
Car's security device (ALARM with 5 letters)
Security device since 1851 (YALELOCK with 8 letters)
Really cool security device? (WICKEDLOCK with 10 letters)
Sitcom security device that often defeated its own purpose (CONEOFSILENCE with 13 letters)
Big security device? (MAXIPADLOCK with 11 letters)
Portable security device (LOCKBOX with 7 letters)
Eponymous security device (YALELOCK with 8 letters)
Security devices available since 1851 (YALELOCKS with 9 letters)