| 摘要 |
<p>A backset latch mechanism having a longitudinal housing adjustable from its rearward backset position in which a traverse spindle-driven swivel unit is engageable with a bolt retractor in the housing having transverse rearward lips engaging the swivel unit passing through the housing. The swivel unit is transversely and longitudinally moveable in the housing to permit the unit to pass forwardly in the housing past traverse forward lips and into engagement with such forward lips to thereby accomplish backset adjustment. The swivel unit is movable in opposite directions to place the mechanism in its first backset position.</p> |
