摘要:
A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position. Either lock can control the position of a bolt works blocking element that selectively engages a lever-driven mechanism that blocks and unblocks the door from being opened. A sensor switch, especially for use on the push-pull lock, tells the lock when the mechanism is in a secured position, so that the lock is automatically re-locked and the user does not have to manually extend the bolt. Finally, the system has a keypad tampering detection and response system, remote enable/disable unit, duress detection and response unit, low-battery sensing arrangement, bolt extension indication feature, adjustable bolt throw feature, and audit trail feature.
摘要:
A membrane or piston pump drive comprises a stepping motor (2) and a rotary-to-linear conversion mechanism for converting the rotary movement into a translation movement (6). The rotary-to-linear conversion mechanism comprises a rotary member (4) and a piston member (7) intended to move a piston or a membrane of the pump. The stepping motor comprises a rotor coupled to the rotary member which engages the piston member (7) in order to drive it in an essentially linear reciprocating movement.