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US 4,069,897 AGranted
Elevator system
AssigneeWestinghouse Electric Corp.
InventorFrederick Solymos
Life of this patent
Estimating the term…
Abstract
An elevator system including an elevator car mounted for vertical movement in a building hoistway, suitable control and drive means, and a buffer-switch combination located in the pit of the hoistway, the switch being electrically connected to the control means. An annular member is mounted about the buffer plunger so that it is free to rotate. A cable is connected between the annular member and the switch so that the switch is in one condition when the buffer plunger is restored and another condition when the plunger is retracted.
Claims5
An elevator system comprising:
- an elevator car mounted for vertical movement in the hoistway of the building;
- drive means for moving said elevator car in said hoistway;
- control means for operating said drive means;
- a self-restoring buffer having a plunger, said buffer being disposed in said hoistway below said elevator car such that overtravel of said elevator car operates said plunger from a restored position to a retracted position;
- a switch, operable between first and second conditions, disposed in said hoistway adjacent to said buffer, said switch being electrically connected to said control means;
- self-aligning connecting means, operably connected between said switch and said plunger, such that said switch is operated between its first and second conditions when said plunger moves between its restored and retracted positions, whereby normal operation of said drive means is permitted only when said switch is in its first condition, corresponding to said plunger being in its restored position.
3 more elements
An elevator system comprising:
- an elevator car mounted for vertical movement in the hoistway of a building;
- drive means for moving said elevator car in said hoistway;
- control means for operating said drive means;
- a self-restoring buffer having a plunger with a circular cross-sectional configuration, said buffer being disposed in said hoistway below said elevator car such that overtravel of said elevator car operates said plunger from a restored position to a retracted position;
- a switch operable between first and second conditions, said switch being disposed in said hoistway adjacent to said buffer, said switch being electrically connected to said control means;
- self-aligning connecting means comprising a length of flexible connecting material and an annular member, said annular member being rotatably mounted about said plunger, with said flexible connecting material being connected between said switch and said annular member with a predetermined alignment, said annular member maintaining said predetermined alignment notwithstanding rotation of said plunger, whereby said switch is operated between first and second conditions when said plunger moves between its restored and retracted positions, said drive means operating normally only when said switch is in its first condition, corresponding to said plunger being in its restored position.
3 more elements
Dependencies are inferred from the claim text.