IL42882A - Double action cylinder lock - Google Patents

Claims (9)

1. A double action cylinder lock of the type applicable to doors and similar structures, said lock having at least one doorknob, a doorknob actuator assembly, and a bar slideable in a casing, and wherein said door* knob actuator assembly is fitted for Insertion into an opening in the plane of the door or similar structure and said bar and bar casing are fitted for insertion into an orifice through the edge of the door or similar structure, said orifice meeting with and oriented normal to said opening, in which said doorknob and doorknob actuator assembly form a unitary structure; said doorknob is sized to fit through said opening without disassembly from said unitary structure; and said doorknob actuator assembly comprises means for fixedly receiving the inner end of said bar casing, and means for coupling said doorknob actuator assembly to said bar.

2. · She lock of Claim 1, wherein said means for receiving is a threaded aperture into which a fixing screw from said bar casing is secured.

3. · The lock of Claim 2, wherein said means for receiving includes a slot and said bar casing includes a guide member projecting from the inner end of said bar casing, the guide serving to align said bar casing with with said doorknob actuator assembly and to prevent axial 42882/2

4. The lock of Claim 1» wherein said bar includes a connecting rod with a hooked end, and said doorknob actuator assembly includes a coupling bolt rotatable with said doorknob and about which said hooked end is coupled, said bar casing including a spring for biasing aaid connecting rod in a direction to couple said hooked end about said coupling bolt. I

5. The lock of Claim wherein said doorknob actuator assembly includes means for drawing said bar into said casing! said coupling bolt is fixed to a support plate rotatably mounted in said doorknob actuator assembly; and said doorknob actuator assembly includes blocking means positionable to block rotation of said plate and thereby selectively prevent and permit withdrawal of said bar into said casing.

6. The lock of Claim 4, wherein said doorknob is an inner doorknob, and including a projection extending from the inner doorknob toward the center of said doorknob actuator assembly and rotatable with said inner doorknob} a key cylinder subassembly having a stop means fixed at the end thereof and in the path of said projection, said stop means limiting the extent of movement of said projection in one direction of movement at which point said bar is in a latch position with said bar extending out of said casing; a resilient means urging said projection in said one direction, said resilient means being compressed by 42882/2 said projection when said inner doorknob is rotated to move said projection in a direction opposite said one direction; and means to move said projection beyond said stop means thereby moving said bar to a dead bolt position beyond said first position, at which dead bolt position only the inner doorknob or key subassembly is effective to move said projection back to the latch position*

7. She lock of Claim 6t wherein said means to move said projection comprises a shaft along which said inner doorknob is slldable; and a compression spring urging said inner doorknob toward said doorknob actuator assembly; whereby pulling on said inner doorknob permits the free end of said projection to pass by said stop means.

8. The lock of Claim 6, wherein said key subassembly is effective to move sai£ projection to position said bar at said second position.

9. A double action cylinder lock substantially as described herein with reference to the accompanying drawings· HE/md