| 摘要 |
A field conversion kit to convert a knob-handle cylindrical lockset (65) either with or without a key cylinder (67), installed in a door, to a lever-handle cylindrical lockset (10) without changing any existing original key cylinder. It includes a lever-handle (12), a drive cartridge adaptor cylinder (23) and a rosette (13) or escutcheon containing a helical spring (28) and a positive stop disk (29). The spring (28) opposes droop of the lever-handle (12) from a normal horizontal position and opposes downward operating force applied to the lever-handle (12) and is increasingly biased when the lever is operated to oppose downward rotation of the lever. A stop (29) in the rosette (13) or escutcheon limits the angular rotational travel of the lever-handle. Differently sized adaptors (23) permit the conversion of different sized cylindrical locks. The kit is applicable to all grades of cylindrical locksets for all functions, including those with key cylinders and interchangeable core cylinders, all types of high security cylinder constructions, and can be used with a knob rose assembly.
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