US4083432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety arrangement
Assignee: Otis Elevator Co
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Filing: 1976-12-01
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Granted: 1978-04-11
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Expires: 1996-12-01
Abstract
Abstract A safety arrangement for an elevator system includes a governor means driven by a vertically suspended elongated flexible member. The flexible member is attached to the actuating member of a braking means which is mounted on an elevator car. When the car overspeeds in a downward direction the governor, operating through the flexible member, actuates the braking means to stop the car. When the car is moving upwardly and decelerating, the flexible member produces an inertial force which is applied to the actuating member of the braking means. To prevent this inertial force from operating the braking means, the safety arrangement includes a compensating means. The compensating means is mounted on the car and operates in response to its deceleration at a predetermined rate to apply a compensating force to the actuating member. This compensating force has a predetermined magnitude and opposes the inertial force of the flexible member to prevent such inertial force from operating the braking means.
Inventors
- 👤 John Lusti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:17
CPC Classifications
B; B66; B66B; B66B5/00; B66B5/02; B66B5/04; B66B5/16; B66B5/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
233 words
In an elevator system in which an elevator car guided by guide rails can be stopped by a hoisting machine when said car reaches a predetermined rate of deceleration, a safety arrangement comprising: braking means having an actuating member mounted on said car; a vertically suspended elongated flexible member attached to said actuating member and movable therewith; governor means driven by said flexible member applying to said actuating member through said flexible member an actuating force of a predetermined magnitude in response to said car exceeding a predetermined velocity, said actuating member responding to said actuating force and causing a braking force to be applied to said guide rails to initiate stopping of said car; said flexible member having a mass such that in response to said car being decelerated at said predetermined rate during upward movement said flexible member applies an inertial force to said actuating member having a magnitude in excess of said predetermined magnitude of said actuating force; and compensating means including a lever arm pivotally mounted on said car and a weight carried by said lever arm, said lever arm being coupled to said actuating member and operating in response to deceleration of said car at said predetermined rate during upward movement to apply to said actuating member a compensating force produced by said weight opposing said inertial force and preventing said inertial force from operating said braking means.
Claim 2
Dependent Claim
233 words
In an elevator system in which an elevator car guided by guide rails can be stopped by a hoisting machine when said car reaches a predetermined rate of deceleration, a safety arrangement comprising: braking means having an actuating member mounted on said car; a vertically suspended elongated flexible member attached to said actuating member and movable therewith; governor means driven by said flexible member applying to said actuating member through said flexible member an actuating force of a predetermined magnitude in response to said car exceeding a predetermined velocity, said actuating member responding to said actuating force and causing a braking force to be applied to said guide rails to initiate stopping of said car; said flexible member having a mass such that in response to said car being decelerated at said predetermined rate during upward movement said flexible member applies an inertial force to said actuating member having a magnitude in excess of said predetermined magnitude of said actuating force; and compensating means including a lever arm pivotally mounted on said car and a weight carried by said lever arm, said lever arm being coupled to said actuating member and operating in response to deceleration of said car at said predetermined rate during upward movement to apply to said actuating member a compensating force produced by said weight opposing said inertial force and preventing said inertial force from operating said braking means.
Claim 3
Dependent Claim
40 words
In an elevator system according to claim 1, a resilient member operably connected with said compensating means for applying to said actuating member a threshold force sufficient to prevent forces less than said actuating force from actuating said braking means.
Claim 4
Dependent Claim
144 words
In an elevator system according to claim 2, wherein said actuating member is pivotally mounted on said car, and wherein said lever arm is elongated and has a notched end engaging said actuating member to resist pivotal movement of said member, said weight being attached to said lever arm at the end opposite said notch; a pin mounted on said car and pivotally supporting said lever arm at a position between said notched end and said weight; said resilient member including a spring attached to said car and to said weight and urging said weight upwardly, said weight applying to said actuating member through said lever arm said compensating force as a result of the inertial force produced by said weight in response to upward deceleration of said car, and said spring applying said threshold force to said actuating member through said lever arm.
Claim 5
Dependent Claim
24 words
In an elevator system according to claim 2, wherein said resilient member includes: a spring mounted on said car for urging said weight upwardly.
Claim 6
Dependent Claim
102 words
In an elevator system according to claim 2, wherein said actuating member comprises a bar slidably mounted on said car, said bar being movable in response to application of said actuating force, sliding movement of said bar operating to cause said braking means to apply said braking force to said guide rails and wherein said resilient member includes: a plunger for engaging said bar and resisting sliding movement thereof; and a spring mounted on said car and urging said plunger into engagement with said bar, said weight being mechanically coupled to said plunger to apply thereto inertial forces produced by said weight.
Claim 7
Dependent Claim
41 words
In an elevator system according to claim 5, wherein said bar has a downwardly disposed notch and is mounted to be slidably movable in a horizontal direction, said spring urging upwardly said plunger to engage its upper end in said notch.
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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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |