US3889231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator signalling system
Assignee: Westinghouse Electric Corp
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Filing: 1973-10-26
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Granted: 1975-06-10
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Expires: 1993-10-26
Abstract
Abstract An elevator system including an elevator car mounted for movement in the hoistway of a building to serve the floors therein. Permanent magnets in the hoistway and magnetically responsive translating devices on the elevator car coact to provide signals indicative of car position. Two spaced permanent magnets coact with a single translating device, or two spaced translating devices connected in electrical series coact with a signal permanent magnet, to provide a position signal of useful duration at elevated car speeds.
Inventors
- 👤 Lawrence Tosato
- 👤 Leon A Abel
- 👤 Clyde M Mullis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/46; B66B1/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
348 words
An elevator system, comprising: a structure having a plurality of floors and a hoistway, an elevator car, means mounting said elevator car for movement in said hoistway to serve at least certain of said floors, and control means for indicating when said elevator car is at a predetermined location in said hoistway, including elongated control element means disposed in said hoistway which extend in the direction of travel of said elevator car, said elongated control element means including first and second spaced control elements, first and second permanent magnets, a magnetically responsive switch, means mounting said first and second permanent magnets with like orientation on said elongated control elements means, means mounting said magnetically responsive switch on said elevator car in predetermined spaced relation from said elongated control element means, said means mounting the first and second permanent magnets including first and second universal mounting brackets, respectively, which are selectively connectable to said first and second control elements with a first orientation which places a predetermined surface of an attached permanent magnet in a first vertical plane, and with a second orientation which places the predetermined surface in a second vertical plane, spaced from and parallel to the first vertical plane, with said first and second universal mounting brackets being mounted on said first and second spaced control elements with like orientation, said magnetically responsive switch being normally in a first condition and being actuated from the first condition to a second condition when subjected to a magnetic field, said first and second permanent magnets being spaced on said elongated control element means in the direction of travel of said elevator car such that when the magnetically responsive switch enters the magnetic field of either said first or second permanent magnet due to movement of said elevator car, the magnetically responsive switch will be actuated to its second condition and maintained in its second condition by the spaced first and second permanent magnets for a period of time which exceeds that possible due to magnetic coaction between only one of said permanent magnets and said magnetically responsive switch.
Claim 2
Dependent Claim
348 words
An elevator system, comprising: a structure having a plurality of floors and a hoistway, an elevator car, means mounting said elevator car for movement in said hoistway to serve at least certain of said floors, and control means for indicating when said elevator car is at a predetermined location in said hoistway, including elongated control element means disposed in said hoistway which extend in the direction of travel of said elevator car, said elongated control element means including first and second spaced control elements, first and second permanent magnets, a magnetically responsive switch, means mounting said first and second permanent magnets with like orientation on said elongated control elements means, means mounting said magnetically responsive switch on said elevator car in predetermined spaced relation from said elongated control element means, said means mounting the first and second permanent magnets including first and second universal mounting brackets, respectively, which are selectively connectable to said first and second control elements with a first orientation which places a predetermined surface of an attached permanent magnet in a first vertical plane, and with a second orientation which places the predetermined surface in a second vertical plane, spaced from and parallel to the first vertical plane, with said first and second universal mounting brackets being mounted on said first and second spaced control elements with like orientation, said magnetically responsive switch being normally in a first condition and being actuated from the first condition to a second condition when subjected to a magnetic field, said first and second permanent magnets being spaced on said elongated control element means in the direction of travel of said elevator car such that when the magnetically responsive switch enters the magnetic field of either said first or second permanent magnet due to movement of said elevator car, the magnetically responsive switch will be actuated to its second condition and maintained in its second condition by the spaced first and second permanent magnets for a period of time which exceeds that possible due to magnetic coaction between only one of said permanent magnets and said magnetically responsive switch.
Claim 3
Dependent Claim
261 words
An elevator system, comprising: a structure having a plurality of floors and a hoistway, an elevator car, means mounting said elevator car for movement in said hoistway to serve at least certain of said floors, and control means for indicating when said elevator car is at a predetermined location in said hoistway, including elongated control element means disposed in said hoistway which extends in the direction of travel of said elevator car, a permanent magnet, first and second magnetically responsive switches, means mounting said permanent magnet on said elongated control element means, means mounting said first and second switches on said elevator car in predetermined spaced relation from said elongated control element means, each of said first and second switches being normally in a first condition and being actuated from the first condition to a second condition when subjected to a magnetic field, said first and second switches being spaced from one another in the direction of car travel such that when one of the switches is actuated to its second condition by the magnetic field of said permanent magnet due to movement of the elevator car, the other of said switches will be actuated to its second condition before the first of the switches returns to the first condition, and means electrically interconnecting said first and second switches such that the interconnected switches cooperatively provide an indication of car position in the hoistway, which persists for a period of time which exceeds that possible due to magnetic coaction between the permanent magnet and one of said first and second switches.
Claim 4
Dependent Claim
261 words
An elevator system, comprising: a structure having a plurality of floors and a hoistway, an elevator car, means mounting said elevator car for movement in said hoistway to serve at least certain of said floors, and control means for indicating when said elevator car is at a predetermined location in said hoistway, including elongated control element means disposed in said hoistway which extends in the direction of travel of said elevator car, a permanent magnet, first and second magnetically responsive switches, means mounting said permanent magnet on said elongated control element means, means mounting said first and second switches on said elevator car in predetermined spaced relation from said elongated control element means, each of said first and second switches being normally in a first condition and being actuated from the first condition to a second condition when subjected to a magnetic field, said first and second switches being spaced from one another in the direction of car travel such that when one of the switches is actuated to its second condition by the magnetic field of said permanent magnet due to movement of the elevator car, the other of said switches will be actuated to its second condition before the first of the switches returns to the first condition, and means electrically interconnecting said first and second switches such that the interconnected switches cooperatively provide an indication of car position in the hoistway, which persists for a period of time which exceeds that possible due to magnetic coaction between the permanent magnet and one of said first and second switches.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |