Multiple door locking control
The method of controlling unlocking of one or both side by side doors, that include providing two rotary input devices; providing a first mechanism responsive to rotation of one of the devices, to unlock one of the doors; providing a second mechanism responsive to rotation of the other of the devices to unlock both of the doors, the second mechanism operatively coupled to the first mechanism, to activate the first mechanism after predetermined rotation of the other device.
1. A method of unlocking one or both of first and second doors, wherein the first and second doors are side by side doors, the method comprising:
a) providing first and second rotary input devices,
b) providing first means for unlocking said first door responsive to manual rotation of said first rotary input device,
c) providing second means for unlocking said first and second doors responsive to manual rotation of said second rotary input device,
d) said second means operatively coupled to said first means for activating said first means after predetermined rotation of said second rotary input device,
e) providing movable lock rod means for locking and unlocking said first door in response to rotation of said first rotary input device, said lock rod means operatively coupled to both of said first and second means,
f) providing a displacement compensation means for compensating the rotary movement of said second rotary input device to the movement of said lock rod means, wherein said displacement compensation means includes a first gear operatively coupled to said first rotary input device, a second gear meshing with said first gear and operatively coupled to an element displaced in response to the throw movement of said second rotary input device, said first gear having a number of teeth N 1 and said second gear having a number of teeth N 2 , where N 1 /N 2 >1; and
g) wherein one of said first and second rotary input devices is a rotatable knob, and the other of said first and second rotary input devices is a rotatable handle lever.
2. The method of claim 1 wherein said first and second rotary input devices have axes of rotation, at generally the same vertical level.
3. The method of claim 1 wherein said first and second rotary input devices are at opposite sides, respectively, of the doors.
4. The method of claim 1 wherein said first means includes a latch mechanism located for release to control unlocking of said first door, in response to rotation of either of said first and second rotary input devices.
5. The method of claim 1 including primary and secondary upright frame members, the primary member carrying said first rotary input device and the secondary member carrying said second rotary input device, wherein said first door includes said primary frame member, and wherein said second door includes said secondary frame member.
6. The method of claim 5 wherein said rotatable handle lever is a manually turnable lever.
7. The method of claim 6 wherein said first means includes a latch mechanism located for release to control unlocking of said first door in response to rotation of either of said first or second rotary input devices.
8. The method of claim 7 wherein said rotatable handle lever includes a projection extending between said primary and secondary frame members and into registration with said primary upright frame member to operate said latching mechanism which is carried by said secondary frame member.
9. The method of claim 1 including a bolt openable by the door to engage and disengage a frame member as said rotatable handle lever is rotated.
10. The method of claim 1 wherein said element comprises a rack meshing with said second gear.
11. A method of unlocking one or both of first and second doors, wherein the first and second doors are side by side doors, the method comprising:
a) providing first and second rotary input devices,
b) providing first means for unlocking said first door responsive to manual rotation of said first rotary input device,
c) providing second means for unlocking said first and second doors responsive to manual rotation said second rotary input device,
d) said second means operatively coupled to said first means for activating said first means after predetermined rotation of said second rotary input device,
e) said first means including a latching mechanism located for release to control unlocking of said first door, in response to rotation of either of said first and second rotary input devices, wherein said latching mechanism includes:
i) a transverse shaft,
ii) a linkage operatively connecting said shaft to said lock rod means to displace said lock rod means endwise in response to shaft rotation,
iii) spring means for urging said lock rod means in an unlocking direction or directions,
iv) a blocking cam rotatable by said shaft,
v) a latch releasably blocking rotation of said blocking cam,
vi) a slider bodily movable to displace said latch to cam rotation unblocking position,
vii) said second rotary input device manually rotated to move said slider,
f) providing endwise movable lock rod means for locking and unlocking said first door in response to rotation of said first rotary input device, said lock rod means operatively coupled to both of said first and second means.
12. A method of unlocking one or both of first and second doors, wherein the first and second doors are side by side doors, the method comprising:
a) providing first and second rotary input devices,
b) providing first means for unlocking said first door responsive to manual rotation of said first rotary input device,
c) providing second means for unlocking said first and second doors responsive to manual rotation of said second rotary input device,
d) said second means operatively coupled to said first means for activating said first means after predetermined rotation of said second rotary input device,
e) providing movable lock rod means for locking and unlocking said first door in response to rotation of said first rotary input device, said lock rod means operatively coupled to both of said first and second means, and
f) providing a displacement compensation means for compensating the rotary movement of said second rotary input device to the movement of said lock rod means, wherein said displacement compensation means includes a first gear operatively coupled to said first rotary input device, a second gear meshing with said first gear and operatively coupled to an element displaced in response to the throw movement of said second rotary input device, said first gear having a number of teeth N 1 and said second gear having a number of teeth N 2 , where N 1 /N 2 >1.