US3768596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator compensation chains
Assignee: Westinghouse Electric Corp
•
Filing: 1972-03-31
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Granted: 1973-10-30
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Expires: 1992-03-31
Abstract
Abstract Resilient spacers provided for alternate links of an elevator compensation chain maintain the links fully extended thereby eliminating chain rattle. The cross-sectional dimensions of the spacers exceed those of the chain links to eliminate noise which would result from the links striking components in the hoistway. Y type connections to the car and counterweight permit the use of a single compensation chain without interference with the buffers.
Inventors
- 👤 F Solymos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:16
CPC Classifications
F; F16; F16G; F16G13/00; B; B66; B66B; B66B7/00; B66B7/06; B66B7/068
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
200 words
An elevator system comprising a structure having a hoistway with a plurality of vertically displaced landings, an elevator car, a counterweight, a cable connected at one end to the car and at the other end to the counterweight, a traction sheave mounted at the top of the hoistway, said cable being reeved over the traction sheave with the elevator car and the counterweight being suspended in the hoistway, motive means connected to the traction sheave for raising and lowering the elevator car in the hoistway to serve the landings, a compensation chain having a series of interconnected links being connected at one end to the elevator car and at the other end to the counterweight with the intermediate links hanging in a loop beneath the car and the counterweight and the improvement which comprises a plurality of tubular resilient spacer members disposed about a plurality of alternate links of said compensation chain and dimensioned such that the ends of each tubular member bear against the adjacent links which are free of such spacer members, whereby the chain is fully extended yet flexible and therefore does not make an appreciable noise as the car moves up and down in the hoistway.
Claim 2
Dependent Claim
200 words
An elevator system comprising a structure having a hoistway with a plurality of vertically displaced landings, an elevator car, a counterweight, a cable connected at one end to the car and at the other end to the counterweight, a traction sheave mounted at the top of the hoistway, said cable being reeved over the traction sheave with the elevator car and the counterweight being suspended in the hoistway, motive means connected to the traction sheave for raising and lowering the elevator car in the hoistway to serve the landings, a compensation chain having a series of interconnected links being connected at one end to the elevator car and at the other end to the counterweight with the intermediate links hanging in a loop beneath the car and the counterweight and the improvement which comprises a plurality of tubular resilient spacer members disposed about a plurality of alternate links of said compensation chain and dimensioned such that the ends of each tubular member bear against the adjacent links which are free of such spacer members, whereby the chain is fully extended yet flexible and therefore does not make an appreciable noise as the car moves up and down in the hoistway.
Claim 3
Dependent Claim
52 words
The combination of claim 1 wherein the dimensions of the spacer member transverse to the axis of the chain exceed the corresponding dimensions of the links of the chain, whereby the links of the chain will not contact the walls or other components in the hoistway, thereby further reducing the noise level.
Claim 4
Dependent Claim
160 words
The combination of claim 1 including a buffer located at the bottom of the hoistway aligned with the center of gravity of the car and operative to bring the car to a safe stop should the car overtravel in the downward direction and also including two lengths of flexible connector for connecting the chain to the car, one end of each flexible connector being attached to the end of the chain and the other end of each flexible connector being separately attached to points equidistant from the center of gravity of the car on a line passing through said center of gravity, with the chain being of such a length that the loop formed by the hanging chain does not strike the buffer when the car is above its lower limit of travel, whereby the chain and flexible connectors will not contact the buffer at any point of travel of the car even as it overtravels in the downward direction.
Claim 5
Dependent Claim
70 words
The combInation of claim 3 including a buffer for said counterweight and a second pair of flexible connectors for connecting the chain to the counterweight, one end of each flexible connector being connected to the end of the chain and the other end of each flexible connector being separately attached to points equidistant from the center of gravity of the counterweight on a line passing through said center of gravity.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |