| 摘要 |
<p>A locking cover for a dead bolt lock assembly that permits a user to put it in one of three positions: neutral, locked and unlocked. The cover in the neutral position permits the operation of the bolt lock assembly normally. The other positions limit the rotational travel of the actuating shaft to one quarter of a turn. The actuating shaft is rotated by turning the locking cover that includes a central tubular cylinder that for selective engagement with the actuating shaft. A pin mounted on the interior of the cover is receivable within one of three holes on an annular base plate that limit the rotation of the actuating shaft. An annular base plate with a through opening includes a perpendicularly disposed tubular member that has an inwardly extending flange that together with an annular plug and a retainer ring keep in place a spring member biasing the cover towards the annular base plate assembly.</p> |
