A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improvements to lock cylinders
A double cylinder lock comprising first and second cores 5, 6, rotatable in cylinder portions 2, 3 either side of a cam 11; selectively coupled to the cam by actuators 13, 14 biased preferably by spring 16. If the cylinder is attacked and the outer cylinder 3 is snapped off then biasing means 16 moves the cam axially which releases a biased anti-tamper locking pin 30 to lock the cam and prevent rotation. Preferably the cam has an aperture 28 into which locking pin engages when the cam is biased axially upon breaking of the cylinder; normally the aperture is misaligned and the pin is biased radially into contact with a surface of the cam. Preferably there is a third actuator 15 which can be moved by insertion of an internal key (9, fig.7), the actuator 15 having an inclined surface 34 which upon axially movement retracts the locking pin and unlocks the cam allowing the cylinder lock to be unlocked from the inside.
Improvements to lock cylinders
A double cylinder lock comprising first and second cores 5, 6, rotatable in cylinder portions 2, 3 either side of a cam 11; selectively coupled to the cam by actuators 13, 14 biased preferably by spring 16. If the cylinder is attacked and the outer cylinder 3 is snapped off then biasing means 16 moves the cam axially which releases a biased anti-tamper locking pin 30 to lock the cam and prevent rotation. Preferably the cam has an aperture 28 into which locking pin engages when the cam is biased axially upon breaking of the cylinder; normally the aperture is misaligned and the pin is biased radially into contact with a surface of the cam. Preferably there is a third actuator 15 which can be moved by insertion of an internal key (9, fig.7), the actuator 15 having an inclined surface 34 which upon axially movement retracts the locking pin and unlocks the cam allowing the cylinder lock to be unlocked from the inside.
Improvements to lock cylinders
DAVID JENNINGS (author) / JOHN MCLOUGHLIN (author)
2018-05-30
Patent
Electronic Resource
English
IPC:
E05B
LOCKS
,
Schlösser