Abstract:
A brake for machine and method of using the brake is disclosed. The brake may comprise first and second brake linings configured to be frictionally engageable with a rail, a first biasing member configured to urge the first brake lining to engage the rail, and a first actuator configured to move the first brake lining (38) to disengage the rail when the first actuator is energized. The brake may be configured to be mounted on a machine, floor or the like.
Abstract:
A pair of elevator cars (10, 11) traveling in the same hoistway have their positions sensed (20-23, 29-32) to provide for each a position signal (35, 37) from which velocity signals (64, 65) are derived; lookup tables (66, 61) of safe stopping distance (B, S) for braking and safeties are formed as a function of all possible combinations of velocity (V(U), V(L)) of said cars. Comparison of safe stopping distances for contemporaneous velocities of said cars with actual distance between said cars provides signals (85, 98, 99) to drop the brakes (49, 50) of one or more of the cars, and provides signals (82) to engage the safeties (18, 18a, 19, 19a) of all cars if the cars become closer or if acceleration detectors (117, 118) determine a car to be in freefall.
Abstract:
An exemplary mounting arrangement for an elevator machine comprises a first portion (32) and a second portion (34). The first portion and the second portion are moveable relative to each other between a shipping position and a deployed position in which the first portion and the second portion are generally perpendicular to each other.
Abstract:
A feedback system for a motor of an elevator system is provided. The feedback system may include a first sensor and a processing circuit. The first sensor may be disposed in proximity to a drive component of the elevator system and configured to detect a change in position of the drive component. The processing circuit may be configured to receive a first data signal from the first sensor corresponding to the change in position of the drive component and generate a feedback signal for controlling the motor based on the first data signal.
Abstract:
The device for controlling movement of a plurality of elevator cars in a single hoistway includes a door monitor module (46) that facilitates controlling movement of elevator cars (22, 24). The door monitor module (46) is configured to determine when at least one door (30) along a hoistway (26) is open. The door monitor module (46) places a first relay (52) in a selected operative state if a first elevator car (22) is stopped at a landing corresponding to the at least one open door. The door monitor module (46) places a second relay (56) in a selected operative state if a second elevator car (24) is stopped at a landing corresponding to the at least one open door. The door monitor module (46) is also configured to place both relays (52, 56) into the selected operative state if neither of the elevator cars (22, 24) is stopped at a landing corresponding to an open door (30) along a hoistway (26).
Abstract:
An elevator system 40 includes an over-acceleration and over-speed protection system capable of triggering a machine room brake and a safety trigger when over-speed or over-acceleration conditions are detected. The system includes a speed detector 42 and an acceleration detector 44. Based upon sensed speed and sensed acceleration, the controller 48 calculates a filtered speed of an elevator mass such as an elevator car 16 or counterweight, and compares the filtered speed to the threshold speed to determine whether an over-speed condition has been reached. The controller 48 activates a machine room brake when an over-speed condition exists, and engages an elevator safety 70A, 70B when it determines that the elevator mass is still in an over-speed condition after the machine room brake has been activated.
Abstract:
An exemplary mounting arrangement for an elevator machine comprises a first portion (32) and a second portion (34). The first portion and the second portion are moveable relative to each other between a shipping position and a deployed position in which the first portion and the second portion are generally perpendicular to each other.
Abstract:
An elevator system includes multiple cars within a hoistway. Parking positions are provided outside the range of passenger service levels. A destination entry strategy is used by a controller for directing movement of the elevator cars. The inventive combination of multiple cars in a hoistway, parking positions outside of the normal passenger service level range and destination entry car movement control allows for reducing car travel speed, reducing car size or both while still meeting desired handling capacity needs or even exceeding the desired handling capacity associated with another elevator system that requires larger cars, higher speeds and more building space.
Abstract:
Controlling the movement of elevator cars (22, 24) within a single hoistway (26) prevents the cars from becoming too close while servicing assigned stops. Example control techniques include controlling door operation of at least one of the elevator cars (22, 24) to effectively slow down a follower car or speed up a leader car for increasing a distance between the cars in an area within the hoistway (26) where the cars would otherwise be too close to each other. Disclosed example techniques also include dynamically altering the motion profile of at least one of the cars and adding an additional stop for one of the cars.
Abstract:
Destination calls entered by means of buttons (21-29) are each given a designation unique to the car and pick-up floor for that call and other calls to be serviced therewith, such as a letter (A-E), which is different from any other outstanding calls. Calls can be reassigned among elevators (UL, LL, UR, LR) whether they are in the same or different hoistways (LF, RT). Signs (31-39, 41-49) adjacent each hoistway are illuminated to display the designation of any call which is being answered by an elevator car approaching the floor Thus, passengers are informed when their call is being answered by the signs identifying the call, rather than identifying any particular car. Another embodiment identifies (60, 31a, 41a) the hoistway landing doorway (1, 2) as well as a letter to allow passengers to wait adjacent to the hoistway landing doorway of the car which will serve them.