Otis Elevator Company

Thomas He

Richard E Kulak

Richard E Peruggi

David W Barrett

Jerome F Jaminet

Edward E Ahigian

Thomas M McHugh

Thomas M Kowalczyk

Zbigniew Piech

Pascal Rebillard

Richard C McCarthy

Vlad Zaharia

Daniel S Williams

Eric K Jamieson

Christophe Durand

Nigel Bruce Morris

Frank Guliuzza, Jr

Levent Gosterisli

Chris Singarella

Joseph Bledsoe

Thomas M Kowalcyk

Thomas Francis Malone, Jr

An apparatus for effecting non-contact linear door displacement comprising a tubular motor formed of a stator () formed from a plurality of magnets () arranged along a linear axis (), and at least one thrust block () each formed of at least one electrically conductive coil encircling the stator () at a distance sufficient to facilitate electro-mechanical interaction between the plurality of coils and the stator (), at least one door () attached to at least one of the plurality of thrust blocks () via a hanger () and the at least one door () capable of a movement in the direction of the linear axis (), a rolling component () to enable movement of the hanger () in the direction of the linear axis (), and a control mechanism () for sensing the position of each of the at least one door () and issuing an electrical control signal to each of the plurality of thrust blocks () so as to affect the movement of the at least one door ().

Tubular linear synchronous motor control for elevator doors

A platform stabilization coupler for transmitting acceleration forces to an elevator platform disposed on an elevator car frame is presented. The coupler includes a vibration member having a first surface disposed in fixed relation to either one of the elevator car frame and the platform. The coupler additionally includes a linear bearing disposed in fixed relation to a second surface of the vibration member. The bearing is disposed in moveable relation with the other of the elevator car frame and the platform to allow substantially vertical movement of the platform relative to the elevator car frame. The vibration member and linear bearing provide a transmission path for the lateral acceleration forces from the elevator car frame to the platform.

Elevator platform stabilization coupler

Acceleration control system utilizing elevator platform stabilization coupler

An elevator cab control system directly minimizes the lateral acceleration of an elevator cab floor, or platform, relative to the elevator car frame by implementing electromagnets between the cab floor and the car frame. The electromagnets are controlled in a closed-loop feedback manner by signals from accelerometers.

Elevator cab floor acceleration control system

Automatic gain control is provided for a control means for controlling a magnetic actuator for an elevator horizontal active suspension. The gain is varied depending on the drive current in the coil of the electromagnet of the magnetic actuator, the airgap of the magnetic actuator, or both.

Automatic open loop force gain control of magnetic actuators for

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.

Elevator door brake, brake, lock, and hold-open

A dual magnet controller, as part of an active roller guide (ARG) controller, that requires that each controlled actuator produce at least a minimum idling force, rather than carrying a minimum idling current. The dual magnet controller for a particular control axis determines force commands for its pair of actuators based on the actuators in combination having to produce a net force, and each actuator independently having to produce a force equal in magnitude at least to a pre-determined minimum idling force. The net force may be calculated by other elements of the ARG controller and communicated as input to the dual magnet controller.

Dual magnet controller for an elevator active roller guide

An electronic motor drive produces a required motion profile for an elevator door operator actuated by a three-phase, line-powered linear induction motor (LIM) by means of an array of TRIAC switches producing selected forces from the LIM. The TRIAC drive is capable of producing acceleration, deceleration or free coast in either the open or close direction of door operation. When controlled by an algorithm such as a 'time-optimal switch point' or 'bang-bang' control, the TRIAC drive produces the required motions from the linear induction motor for elevator door operation. The motor windings may be switchable between delta and wye hookups to provide two distinct thrust levels. Phase angle modulation may be used to provide finer control of thrust. The linear motor may be a 12-slot arrangement having four poles and three phases and arranged with flux emanating from the stationary primary (on the car) to a stationary backiron part of the secondary also mounted on the car, wherein the flux passes through a movable copper part of the secondary attached to the elevator door and passing between the primary and the backiron.

Triac drive for three-phase line-powered linear induction motor elevator

A linear induction motor utilizes a double-sided primary and a dual secondary to directly drive an elevator car door open and closed. The invention has the advantage of being compact: all magnetic-attractive loads are confined to a primary mount bracket, and all thrust loads are carried directly by the car header, not transferred to the cab. Also, high thrusts can be developed from a small space, i.e., short net working coil area, due to the double-sided primary winding and dual secondary arrangement. The configuration is basically simple, with a low moving mass and easy-to-fabricate parts, the primary core being particularly easily wound.

Elevator door drive using dual secondary linear induction motor

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.

Elevator car evacuation deterrent device

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.

Time-optimal control of an AC line-driven linear motor elevator door

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.

Elevator hoistway door bolt lock

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.

Elevator cab door drive system

An elevator door hold-close device in combination with a moving vane elevator door coupler having first and second vanes pivotally connected by links to form a parallelogram pivotally movable between a first compressed uncoupled position and an expanded coupled position. A structural member is fixed to the elevator car and has a friction pad configured for retentive engagement with a friction pad on the vane assembly to hold the car door closed against manual operation when the elevator car is in flight.

Growing community of inventors

Unionville, CT, United States of America

Thomas He