Abstract: The present invention provides new door lock combination chambers for use with door locks, particularly pushbutton door locks. The combination chamber includes rotary keys which are actuated by pressing pushbuttons when entering an unlocking code into the combination chamber. The rotary keys rotate and engage idler gears which are engaged with a timing gear and code gears. The code gears have pockets which become aligned with an unlocking slide when the proper unlocking combination is entered into the combination chamber. The unlocking slide can be slide into the pockets on the code gears, and thus allow a corresponding locking mechanism retract a latch bolt in a door.

Abstract: The present invention provides new pushbutton door locks, particularly pushbutton paddle locks, for use in controlling access through doors. The pushbutton door lock has a combination chamber which has a plurality of pushbuttons for entering an unlocking combination. An operator actuatable button and an outside paddle are provided to actuate an unlocking mechanism after the correct unlocking code has been entered into the combination chamber. The outside paddle has a single motion which unlatches the door latch and opens the door. An inside paddle may also be provided to unlatch and open the door without restricting access through the door. A hold open feature may also be provided on the inside of the door lock.

Abstract: A retrofit knob cylinder has a cross-shaped slot on the rear of the cylinder plug and a cross-shaped opening through a plug retainer so that a number of different tail pieces may be assembled to the plug and extend through the opening and may be positioned either horizontally or vertically depending on which portion of the cross slot they are assembled in.

Abstract: A cylindrical lock assembly for mounting in a door panel having a transverse bore includes a lock chassis adapted to fit within the bore which has lever handles on rotatable spindles for actuating a latch bolt. The chassis additionally has a support opening on at least the first side of the door panel. A support plate having a diameter greater than the bore is mounted on each side of the door panel and is non-rotatably secured to the panel. The support plate includes an opening corresponding to and aligned with the chassis support opening. A threaded support plate fastener having a hollow, elongated body with an internal opening extending along its length is adapted to extend through the opening in one of the support plates and into the chassis support opening to non-rotatably secure the chassis to the support plate.