Abstract:
An exemplary enclosure for housing electronics useful with an elevator system includes a first sidewall and a second sidewall adjacent the first sidewall. A third sidewall is at an oblique angle relative to the first sidewall. The third sidewall provides a support surface for supporting electronics inside the enclosure. The first and second sidewalls are moveable relative to the third sidewall to provide a single opening facing the support surface.
Abstract:
An elevator car includes a foldable handrail mounted on top of the car. Safety switches are associated with the foldable handrail including a first safety switch and a second safety switch. The first safety switch is closed only when the handrail is folded in a fully retracted position. The second safety switch is closed when the handrail is unfolded in a fully deployed position. A safety chain is associated with the first and second safety switches for supplying power to an elevator drive system in a normal operation or an inspection operation depending on the state of the first and second safety switches.
Abstract:
An elevator system includes a counterweight-drive assembly (26) having a motor (32) and drive pulley (36) mounted internally to engage a drive belt (42) for climbing or descending with respect thereto, resulting in raising or lowering of an elevator car (12) coupled to said counterweight-drive assembly (26).
Abstract:
The elevator has a car movable vertically within a shaft between lower and upper end positions and a drive system coupled to a traction system for controlling movement of the car. A limit switch which is open when the car is in a selected distance range from one of the end positions. The limit switch forms part of a power line supplying power to the drive system for controlling movement of the car in a direction towards that end position in an inspection operation. Thus movement of the car is prevented only in that direction when the car is in the selected distance range in an inspection operation.
Abstract:
A safety device for an elevator system includes a retractable element mounted on a support. The retractable element has a stopping position in which a catch portion of the retractable element projects from the support to engage a triggering member of a safety brake associated with an elevator car as the elevator car traveling in a selected direction approaches a selected vertical position, and a retracted position. An actuator selectively controls the position of the retractable element. A position sensor is responsive to the position of the retractable element to make sure that it is in its stopping position when needed.
Abstract:
An exemplary enclosure for housing electronics useful with an elevator system includes a first sidewall and a second sidewall adjacent the first sidewall. A third sidewall is at an oblique angle relative to the first sidewall. The third sidewall provides a support surface for supporting electronics inside the enclosure. The first and second sidewalls are moveable relative to the third sidewall to provide a single opening facing the support surface.
Abstract:
The safety device for an elevator system comprises a retractable element mounted on a support. The retractable element has a stopping position in which a catch portion of the retractable element projects from the support to engage a triggering member of a safety brake associated with an elevator car as the elevator car traveling in a selected direction approaches a selected vertical position, and a retracted position. An actuator selectively controls the position of the retractable element. A position sensor is responsive to the position of the retractable element to make sure that it is in its stopping position when needed.
Abstract:
An elevator system includes guide rail mounted machine (16) and a sheave assembly (32) that accommodates a guide rail (38) within a hoistway. The inventive sheave assembly includes individual sheave portions (54) rotatable along a common axis. At least two of the sheave portions are spaced apart along a shaft (50) and a portion of the guide rail extends toward the axis beyond a plane formed tangent to the outside diameter of the sheave portions.
Abstract:
An elevator system (1) includes a guide rail bracket (10) attached to a single hoistway wall (20). Car guide rails (5) and counterweight guide rails (6) are fixed to the bracket (10). The counterweight guide rails (6) are positioned in between the car guide rails (5) so that the counterweight (11) can translate therebetween. The elevator car (8) is supported by rope (4) and sheave (2, 3) members coupled to a traction drive (16).
Abstract:
An exemplary embodiment of the invention is directed to an elevator braking system including an accelerometer for detecting acceleration of an elevator car and generating an acceleration signal. An over-acceleration detection module compares the acceleration signal to an acceleration threshold. If over-acceleration detection module detects an over-acceleration condition, a first switching device disrupts power to a solenoid in order to activate a braking assembly.