Otis Elevator Company

Otis Elevator

Boris G Traktovenko

Clement A Skalski

Richard L Hollowell

John K Salmon

Richard N Fargo

Bruce P Swaybill

Robin Mihekun Miller

James Leo Hubbard

John M Milton-Benoit

Bruce St Pierre

John J Ferrisi

Mark F Orelup

Arthur Hsu

Richard J Ericson

Frank M Sansevero

Harold Terry

John T Pitts

Harry Terry

Dave Jarvis

David Sirag

Peter O Erlandsen

John J Kriss

Robert Hammell

Daniel R Greer

Loren D Fanion

Kevin Gleason

Ken Woronoff

Saravana Kumar Kandasami

Shailendra Singh

Kandi Puroshotham Pavan Kumar

Laxmipathi Chilaveni

Vijal Mohan Veeramalla

Kotur Srinivasan Raghavan

Arther Hsu

James L Iii Hubbard

Vijai Mohan Veeramalla

An elevator system () load bearing assembly () includes a plurality of load bearing members (-). At least one of the load bearing members (-) has a load carrying capacity that is different than at least one other of the load bearing members (-). A disclosed example includes equal numbers of load bearing members () having a first load carrying capacity and equal numbers of load bearing members () having a second, different load carrying capacities. Another example includes at least three different load carrying capacities. With the disclosed examples, the aggregate load carrying capacity of an elevator load bearing assembly () can more closely meet the load carrying requirements for a given elevator system without over-roping the system.

Elevator load bearing assembly including different sized load bearing members

A socket device () for securing an end of a load bearing member () includes first socket members (and) and second socket members (and) that are distinct, separate pieces of material. The second socket members (and) are spaced apart from each other at a desired angle and rigidly secured on one side to one of the first socket members () and on another side to the other first socket member () to form the socket (). A disclosed example includes cooperating tabs () and recesses or openings () for securing the socket members together in a rigidly fixed alignment.

Elevator load bearing termination assembly

An elevator system () includes multiple elevator cars () within a hoistway (). Counterweights () are associated with the respective elevator cars () by load bearing members (). In some examples, different roping ratios are used for the load bearing members (). In some examples, the lengths of the load bearing members () are selected to allow contact between the counterweights () within the hoistway () and prevent contact between the elevator cars (). The difference in car and counterweight separation distances is greater than a stroke of a counterweight buffer plus an expected dynamic jump of the elevator cars. A disclosed example includes passages () through a portion of at least one of the elevator cars () for accommodating the load bearing member () of another elevator car () located beneath the elevator car () with the passages ().

Elevator system with multiple cars in a hoistway

An elevator machine () assembly useful in an elevator system () includes a motor frame () that supports a motor () for selectively rotating a motor shaft (). A brake () selectively applies a braking force to resist rotation of the motor shaft (). At least one load sensor () resists undesirable movement of the brake () and provides an indication of a load that results from applying the braking force. A disclosed example includes using a first resistive member () to resist movement of the brake () relative to the motor frame () when the load is below a threshold load and using a second resistive member () to resist movement when the load exceeds the threshold load.

Elevator motor brake torque measurement device

An elevator system () includes an underslung car (). A plurality of load bearing members (-) are closer together behind the elevator car and spaced farther apart near a front of the elevator car (). A plurality of sheaves (-) are supported for vertical movement with the car and rotational movement relative to the car () such that the load bearing members (-) can be arranged in a 2:1 roping ratio and extend underneath the car (). A disclosed example includes sheaves (-) rotatable about sheave axes that are at oblique angles relative to corresponding edges of the elevator car ().

Elevator car having an angled underslung roping arrangement

A device for securing an end on a load bearing member in an elevator system includes a socket portion and a wedge portion. The socket and wedge preferably are made from an extruded piece of metal or a formed piece of sheet metal material. A brace member secures the wedge within the socket portion to maintain the wedge, and the corresponding portion of the load bearing member in place within the socket portion. The preferred arrangement includes friction enhancing surfaces on the corresponding portions of the socket and the wedge to facilitate maintaining the load bearing member in place.

A steering angle of an elevator sheave on a shaft is adjusted at installation and subsequently during maintenance by one of several embodiments. In one embodiment, a bolt with a jam nut is adjusted to position the shaft precisely. In another embodiment, a tee bracket is anchored to a hoistway wall, and a jack bolt with shims is used to adjust the vertical placement of the long beams that support the elevator car frame and therefore the shaft.

Method and apparatus for adjusting steering angle for elevator sheave

Several embodiments of terminations for flat flexible tension members include wedge type terminations, pinching terminations, and frictional terminations and combinations of the above.

Termination for flat flexible tension member

A rail clip that is generally symmetrical about a central axis. The clip has an L-shaped base section having a horizontal leg that is securable to a support member upon which the rail rest and a vertical leg that extends upwardly from the base adjacent to the rail. An arm extends outwardly over the rail from the vertical leg of the base section and an elongated beam is mounted in the distal end of the arm that extends outwardly to either side of the arm so that beams run longitudinally along the rail. A contact pad is carried on both ends of the beam which normally rest in holding contact against the rail. As the rail is displaced upwardly in reference to the arm, second contact points are established to progressively stiffen the clip.

Rail clip

An elevator system 10 includes an elevator car 12 with a plurality of roller guide assemblies 20 attached hereto. The roller guide assemblies 20 guide the elevator car 12 vertically within a hoistway along a plurality of guide rails 16. Each roller guide assembly 20 includes at least one resin stop assembly 50 to minimize vibration and lateral movement of the elevator car 12. The resin stop assembly 50 includes a resin spring 52 adjacent to a rigid container 54, both coupled between a roller wheel arm 26 and the roller guide base 40. The resin stop assembly 50 improves the ride quality of the elevator car 12 by selectively limiting lateral acceleration and velocity of the elevator car 12.

Resin stop assembly for roller guides

A double deck elevator car comprises a double deck elevator cab 40 having two compartments 41, 42 suspended midway along its vertical length by isolation pads 46 to support frames 47, 48 disposed on stiles 17, 18. Non-contact, stroke limiting cab steadiers 49 are used at the upper end of the double deck cab 40.

Double deck elevator cab

An elevator control system has a roller guide assembly comprising a plurality of rollers arranged in a cluster having at least one roller connected thereto for coupling an elevator car to a guide rail mounted on an elevator hoistway wall. The roller guide assembly comprises a pivot arm for pivoting on a horizontal pivot axis in relation to a longitudinal axis of the guide rail. The elevator control system features one or more electromagnet actuators for providing both vibration and centering control and without any solenoid for providing centering control.

Elevator control system featuring all-electromagnet vibration and

An apparatus is provided for preventing sway of elevator ropes (7). The apparatus comprises a swing arm (2) positioned within a hoistway (6) of an elevator. The swing arm is movable between a first position and a second position wherein the swing arm is in proximity with the ropes in the first position and the ropes contact the swing arm thereby reducing sway and wherein the swing arm is positioned outside of the path of an elevator car (8) in a second position. An embodiment includes a sheath (21) having tapered ends (22, 23) mounted to the end of the swing arm to facilitate the movement of the swing arm through the plurality of ropes.

Growing community of inventors

Avon, CT, United States of America

Boris G Traktovenko