Explanatory notes
… fastening devices operated by a key (e.g., locks of the cylinder, lever, tumbler or Bramah types) or controlled by a … locks (e.g., for street doors of blocks of flats or for lift doors). These locks may be operated, e.g., by insertion … for automobiles, railway-rolling-stock, tramcars, etc., for lifts, shutters, sliding doors, etc. (C) Clasps and frames …