US 4,418,552 AGranted

Simultaneously locking and unlocking dead bolt and lock latch with panic unlocking

OwnerRoger J. Nolininventor

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Abstract

Extending a dead bolt into a locked position turns a crank that releases a lock release plate from an unlocked position which in turn releases a slide. Upon its release, the slide responds to springs and forces a tooth into a notch of an actuator to lock a latch bolt. To unlock the latch bolt and the dead bolt, the dead bolt can be directly retracted, whereupon the crank engages the lock release plate to move it back to its unlocked position. The lock release plate during this travel picks up the slide and withdraws the tooth from the actuator, freeing the latch bolt assembly. When locked, the latch bolt and the dead bolt can be simultaneously unlocked by rotation of an inside operator which produces rotation of a double-lobed cam. One lobe of the cam moves the slide against the force of the springs sufficiently to clear the tooth from the actuator. The cam continues to move the slide so that the slide engages the crank and rotates the crank to retract the dead bolt and force the crank into its unlocked position in a detent of the lock release plate. The force of the springs on the detent maintains the crank in its unlocked position. After the tooth clears the actuator, a dog on the cam picks up the actuator to rotate it and withdraw the latch bolt. For lever-actuated outside operators, the actuator has a finger engageable by the slide that in turn follows the rotation of the double-lobed cam. A lost motion space between the roller and the finger permits withdrawal of the tooth from a notch in the actuator prior to rotation of the actuator.

Claims17

Dependent claims

An improvement in a lockset of the type having an escutcheon mounting a dead bolt assembly and a latch bolt assembly, the dead bolt assembly having inside and outside operators to extend and retract the dead bolt through a dead bolt drive upon locking and unlocking either of the dead bolt operators, the latch bolt assembly having inside and outside operators to extend and retract the latch bolt through a latch bolt drive upon operation of either of the latch bolt operators, the improvement comprising:

(a) a slide mounted in the escutcheon for movement towards and away from the dead bolt assembly and with such movement away and toward the latch bolt assembly between a first position of the slide and a second position of the slide, respectively;
(b) means to bias the slide towards its first position proximate the latch bolt assembly and remote from the dead bolt assembly;
(c) a lock release mounted in the escutcheon for movement between a first position of the lock release and a second position of the lock release, respectively;
(d) crank means coupled to the dead bolt assembly for rotation between a crank locked position and a crank unlocked position, corresponding to a locked dead bolt and an unlocked dead bolt, respectively, the crank means during its movement from its locked to its unlocked position engaging the lock release and moving the lock release to its first position from its second position, the crank means in its unlocked position maintaining the lock release in its first position;
(e) means of the lock release to engage the slide and move the slide to its first position during movement of the lock release from its second position to its first position in response to rotation of the crank means between its locked position and its unlocked position, such means thereafter maintaining the slide in its first position;
(f) a latch actuator in the escutcheon and secured to the latch bolt drive for rotation therewith, the inside operator of the latch bolt drive being engageable with the actuator to rotate it and open the latch bolt;
(g) means for locking the slide and the latch actuator against relative rotation when the slide is in its second position and in response to the bias means;
and
(h) cam means on the inside operator of the latch bolt assembly engageable with the slide to move the slide and release the lock means and move the crank means to its unlocked position upon rotation of the inside operator.

6 more elements

In a double bolt lockset of the type that mounts on the surface of the door and which includes a dead bolt assembly and a latch bolt assembly, the dead bolt assembly including inside and outside operators to extend and retract the dead bolt through a dead bolt drive upon locking and unlocking either of the dead bolt operators, the latch bolt assembly having inside and outside operators to extend and retract the latch bolt through rotation of a latch bolt drive upon operation of either of the latch bolt operators, and an escutcheon mounting the inside operators of both the latch bolt and dead bolt and having means to mount the case to a door, an improvement which comprises:

(a) a lock release mounted in the escutcheon for translation towards and away from the dead bolt assembly and the latch bolt assembly between a locked position toward the latch bolt assembly and an unlocked position toward the dead bolt assembly;
(b) a slide mounted in the escutcheon for translation towards and away from the dead bolt assembly and the latch bolt assembly;
(c) means to bias the slide toward the latch bolt assembly and away from the dead bolt assembly;
(d) crank means coupled to the dead bolt assembly for rotation between a locked position and an unlocked position in engagement with the lock release, such positions corresponding to an unlocked dead bolt and a locked dead bolt, the crank means in rotating between the locked position and the unlocked position engaging the lock release and translating it to the lock release's unlocked position;
(e) a latch actuator secured to the latch bolt drive and located in the escutcheon in line with the slide;
(f) lock means for the slide and the latch actuator to lock the latch actuator against rotation upon engagement by the slide in response to the bias means permitted by movement of the lock release to its locked position;
(g) means coupling the lock release and the slide together such that upon movement of the lock release to its unlocked position the slide moves away from the latch actuator and unlocks the lock means;
(h) means coupled to the inside operator of the latch bolt assembly for moving the slide against the force of the biasing means and unlock the latch actuator and to move the crank means to its unlocked position upon operation of such operator;
whereby:
(i) upon locking of the dead bolt, the biasing means forces the slide into engagement with the latch actuator to lock the slide relative to the latch actuator with the lock means;
(ii) upon unlocking the dead bolt the crank means moves the lock release to its unlocked position which in turn moves the slide and unlocks the slide from the latch actuator;
and simultaneous locking and unlocking of the dead bolt and latch bolt occur;
and
(iii) upon operation of the inside operator of the latch bolt assembly, when locked, both the latch bolt and dead bolt retract to open positions.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/279,590Filed 1 Jul 1981 · continuation in part
Priority: 22 Oct 1979
Granted: 6 Dec 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

E05B 65/1086
For panic or emergency doors: locks with panic function, e.g. allowing opening from the inside without a ley even when locked from the outside
E05B 59/00
Locks with latches separate from the lock-bolts or with a plurality of
Y10S 292/65
Closure fasteners: emergency or safety
Y10T 70/5159
Door: emergency exit