| 摘要 |
<p>A handleset having a half round spindle for operating a latch assembly when rotated from a neutral orientation, a cylinder lock having a key operated cylinder assembly which rotates a round spindle, a half round driving pinion mounted for rotation on the round spindle, a rack having teeth engaged with the pinion, a connector displaceable between down and up positions, a pivotal thumb piece having a lever for displacing the connector from the down position to the up position, the connector having an arcuate slot, a locking arm having an arcuate flange for location in the arcuate slot, an axially extending pin, and a central opening, the round spindle including a cam secured thereto at a location selected so that the cam will be located within the opening, the cam and the opening being selectively configured so that turning the key from the neutral orientation to the lock open position will result in the cam rotating the locking arm from a first position whereat the arcuate flange is at one end of the arcuate slot to a second position whereat the arcuate flange is at the other end of the arcuate slot, and the rack having a slot for receiving the pin, the rack slot being configured to prevent relative vertical movement between the rack and the locking arm when the locking arm is at the first position and to permit relative vertical movement between the rack and the locking arm when the locking arm is at the second position.</p> |
