Safety brake for elevators and aerial cableways
AssigneeSoll Kommanditgesellschaft, Industrieschmiede
InventorManfred Frankel
Life of this patent
Estimating the term…
Abstract
A safety brake is provided for elevators, aerial cableways and the like which prevents unchecked downward travel of the cable car or the elevator cabin in case the lifting or drive cable breaks, or the transmission gear mechanism or the drive motor fails.
Claims9
A safety brake for decelerating an elevator cabin, a cable car or the like moving along guide means said safety brake comprising a transmission shaft adapted to be driven by said guide means through transmission means, a speed limiter mounted on the transmission shaft including a centrifugal brake having centrifugal weights carrying brake linings, a brake disc mounted on the end of the transmission shaft, a housing, a brake bell surrounding the speed limiter and the brake disc so that said brake bell will be frictionally engaged and rotated by the brake linings carried on the centrifugal weights of the speed limiter when the triggering speed is exceeded, said bell being supported in said housing for rotation and for axial movement between an inoperative position in which said bell does not engage said brake disc and an operative position in which said bell frictionally engages said brake disc, and means for axially displacing the brake bell from said inoperative position to said operative position upon rotation of said bell through less than one complete rotation and for limiting the rotation of the brake bell to less than one complete rotation.
A safety brake for decelerating an elevator cabin, a cable car or the like moving along guide means, said safety brake comprising a transmission shaft adapted to be driven by said guide means through transmission means, a speed limiter mounted on the transmission shaft including a centrifugal brake having centrifugal weights carrying brake linings, a housing, a brake disc mounted on the end of the transmission shaft, a brake bell surrounding the speed limiter and the brake disc and engaged by brake linings carried on the centrifugal weights of the speed limiter when the triggering speed is exceeded, said bell being supported for rotation and for axial movement in said housing, and means for axially displacing the brake bell and for limiting the rotation of the brake bell to less than one complete rotation, said brake bell engaging and decelerating the brake disc upon axial displacement thereof, said means for axial displacement of the brake bell and for limiting the rotation of the brake bell comprising two mutually complementary conical spiral discs one of which is carried at the bottom of the housing, the other spiral disc being carried on a planar outer face of the brake bell, the thickness of the spiral disc carried on the brake bell decreasing uniformly in the direction of rotation of the transmission shaft during downward direction of travel of the elevator, each of said spiral discs having a step between the point of minimum and maximum thickness thereon.
Dependencies are inferred from the claim text.