摘要:
Embodiments of the present invention address deficiencies of the art in respect to instant messaging and provide a method, system and computer program product for. In one embodiment of the invention, a chat session suspension and resumption management method can include establishing a chat session among at least two conversants, receiving a request by one of the conversants to suspend the established chat session for a specified duration of time, and suspending the chat session for the specified duration of time and automatically resuming the chat session subsequent to the specified duration of time without further instruction by the conversants. The method further can include determining whether the request to suspend the established chat session for the specified duration of time permits negotiation of the specified duration of time, and exchanging negotiated durations of time between the conversants until arriving at an agreed upon duration only if permitted by the request.
摘要:
The door or doors on an elevator cab are driven during their opening and closing cycles by a linear induction motor drive system. The primary of the linear motor is fixed to the cab assembly, and the secondary is mounted on the door hanger panel and moves with the door. In order for the secondary to maintain a proper spacing relative to the primary, a flexible connection is provided between the secondary and the remainder of the door. In this way, shifting of the door during its opening and closing movements will not cause misalignment of the secondary with respect to the primary.
摘要:
A linear motor for operating an elevator door is energized using a bang-bang control strategy (10) wherein three-phase AC utility mains (16) are connected (29) directly to the linear motor primary (14) by means of a motor control (12) in response to control signals (26) provided under the direction of a control strategy (10), which may be microprocessor-based. Commands (24) from an elevator controller to open/close the elevator door cause the system to operate the doors and a sensor (22) provides feedback (28) by means of which the control (10) is able to determine switch points for switching the AC mains.
摘要:
An elevator hoistway door lock comprises a rod journaled for rotation on a hoistway door. A pin which extends laterally from the rod engages a lip when the rod is rotated into a locked position by means of its own weight, and optionally a spring. The pin clears the lip when the rod is rotated into an unlocked position by means of a retiring cam disposed on the elevator car. The electrical safety switch contacts are interconnected by a rotating contact disposed on the rod, only when the rod is rotated to place the pin in the locked position.
摘要:
An elevator hoistway door is coupled to an elevator car door so as to be opened and closed in unison therewith by means of a pair of shoes which are mounted on the elevator door and have cammed surfaces that allow the shoes to be spread so as to be wedged within the walls of a channel that is mounted on the hoistway door. The wedging action is caused by a solenoid actuator and the shoes are returned by means of a spring to a rest position in which they have adequate clearance within channels of all of the hoistway doors which the elevator may pass. Advance door opening and releveling is accommodated by means of rollers or sliding contact.
摘要:
When an elevator is running, the car door 27 is locked in the closed position by a brake shoe 12 which engages the edge of the door hanger 24 in response to a push-type solenoid 19 overcoming the force of a spring. When the door is not closed, a friction brake pad 11 contacts the door hanger surface to hold the door open for passenger boarding or to stop the door in case of failure of door operator power while the door is in motion.
摘要:
An elevator door evacuation deterrent device in combination with a moving vane elevator door coupler having a pair of coupler vanes pivotally connected by links to form a parallelogram movable between a compressed position, an expanded interlock position and a third expanded overtravel locking position when the elevator car is outside a landing zone. A top end from one of the vanes projects upwardly and abuts a locking plate on the elevator car to limit movement of the car door in the overtravel locking position when the car is outside of a landing zone.
摘要:
An elevator hoistway door lock assembly comprises first and second lock subassemblies. Each lock subassembly has a rotatable latch mounted on a respective door hanger, a first and second catches are mounted on the hoistway for engagement with each respective latch, a first and second cam followers are fastened to the respective latches and movable between a first position in which each latch engages the respective catch in a locked position and a second position in which each latch is disengaged from the respective catch in an unlocked position so that the hoistway doors may be moved to an open position and each pair of electrical contacts for indicating a locked condition of the respective door when the contacts are electrically connected.
摘要:
A coupling for causing an elevator car door to engage an elevator hoistway door includes a pair of vanes, each end of each vane pivoted on a link connecting it with the other vane, the links being disposed for rotation between said two vanes on an elevator car door thereby forming a parallelogram. The vanes extend vertically between four rollers which rotate about horizontal axles disposed at the top of the hoistway door, and which provide rotationally stiff coupling. A solenoid actuator can move one vane up to cause the parallelogram to shrink, into an uncoupled position. When the actuator is disenergized, a spring causes the parallelogram to spread so that the vanes are wedged between the rollers and the two doors are coupled together.
摘要:
A horizontally stiff, but vertically yielding coupling between an elevator car door and an elevator hoistway door includes a brushless torque actuator which rotates a member (disposed on the elevator door) between a first, clearance position and a second, coupling position where it becomes wedged between the walls of a channel disposed on a hoistway door. The member may have rollers to make contact with the walls of the channel, or it may simply have sliding surfaces for contact with the channel.