US3662860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator vertical shift and lateral dolly control system
Assignee: Doosan Bobcat North America Inc
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Filing: 1970-05-28
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Granted: 1972-05-16
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Expires: 1990-05-28
Abstract
Abstract An automatic control system is disclosed for an elevator of the type adapted for material handling in an automatic warehouse. The control system includes means for moving the elevator selectively to one of two different vertical null positions in accordance with the desired operation of either depositing or withdrawing a material unit from an adjacent bin. The first and second null positions are established by a first and second pair of transducer means on the elevator car which coact with a reference signal device on the elevator mast. The first and second transducer means may be selectively enabled and disabled to cause a shift of the elevator from one null position to the other. The elevator car is provided with a lateral dolly movable between an extended position and a retracted position for the manipulation of the material unit. An automatic control system is provided for the lateral dolly to correlate the motion thereof with the vertical shift of the elevator between the null positions in a sequence dependent on whether a material unit is being deposited or withdrawn from the bin.
Inventors
- 👤 Arthur R Burch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:01
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/0755
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
A control system for a vehicle comprising: drive means adapted to move said vehicle, control means for energizing the drive means, a null signal device at a predetermined location, a pair of transducer means adapted to be mounted on the vehicle and spaced apart in the direction of motion, each of the transducer means comprising first and second sensors and said signal device comprising two signal elements each coating with a respective one of said sensors and each of said transducer means being responsive to a predetermined positional relation to said signal device to cause the control means to de-energize the drive means, and additional control means for selectively enabling and disabling the transducer means according to a desired mode of operation whereby the vehicle may be moved successively between first and second predetermined positiOns.
Claim 2
Dependent Claim
135 words
A control system for a vehicle comprising: drive means adapted to move said vehicle, control means for energizing the drive means, a null signal device at a predetermined location, a pair of transducer means adapted to be mounted on the vehicle and spaced apart in the direction of motion, each of the transducer means comprising first and second sensors and said signal device comprising two signal elements each coating with a respective one of said sensors and each of said transducer means being responsive to a predetermined positional relation to said signal device to cause the control means to de-energize the drive means, and additional control means for selectively enabling and disabling the transducer means according to a desired mode of operation whereby the vehicle may be moved successively between first and second predetermined positiOns.
Claim 3
Dependent Claim
170 words
A control system for an elevator car and the like comprising: a car movable relative to a frame and drive means connected therewith, control means for energizing the drive means to move the car in a selected direction, a null signal device on the frame at a predetermined location, a pair of transducer means on the car spaced apart in the selected direction and aligned with said signal device so that the transducer is disposed opposite said device when the car approaches the predetermined location, each of the transducer means comprising first and second sensors and said signal device comprising two signal elements each coacting with a respective one of said sensors, and each of said transducer means being responsive to a predetermined positional relation to said signal device to cause the control means to stop the car, and additional control means for selectively enabling and disabling the transducer means according to a desired mode of operation whereby the car may be moved successively between first and second predetermined positions.
Claim 4
Dependent Claim
170 words
A control system for an elevator car and the like comprising: a car movable relative to a frame and drive means connected therewith, control means for energizing the drive means to move the car in a selected direction, a null signal device on the frame at a predetermined location, a pair of transducer means on the car spaced apart in the selected direction and aligned with said signal device so that the transducer is disposed opposite said device when the car approaches the predetermined location, each of the transducer means comprising first and second sensors and said signal device comprising two signal elements each coacting with a respective one of said sensors, and each of said transducer means being responsive to a predetermined positional relation to said signal device to cause the control means to stop the car, and additional control means for selectively enabling and disabling the transducer means according to a desired mode of operation whereby the car may be moved successively between first and second predetermined positions.
Claim 5
Dependent Claim
61 words
The invention as defined in claim 2 wherein said sensors each include a field producing means and a field responsive means in spaced relation to each other and each of said signal elements includes a passive field distorting means adapted to coact with said field producing means and cause operation of the field responsive means when a predetermined positional relationship occurs.
Claim 6
Dependent Claim
46 words
The invention as defined in claim 3 wherein said field producing means comprises a magnet and said field responsive means comprises a magnetically responsive switching means and wherein said field distorting means comprises a member of magnetic material of high permeability relative to that of air.
Claim 7
Dependent Claim
79 words
The invention as defined in claim 2 wherein each of said sensors comprises a permanent magnet and a magnetic field responsive switch with an air gap therebetween and wherein said signal elements comprise a plate of magnetic material adapted to extend into said air gap, each of said switches being adapted to change from a first state to a second state when a plate of magnetic material is disposed in said air gap in a predetermined positional relationship thereto.
Claim 8
Dependent Claim
199 words
An elevator control system comprising an elevator car and drive means therefor control means connected with said drive means, said control means including a signal device at a reference position on the path of movement of said elevator car, a first transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a first null position, a second transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a second null position, said first and second transducer being spaced apart in the direction of movement, a transducer selector circuit for operatively connecting said first transducer with said control means and effectively disconnecting said second transducer therefrom and switching means connected with the selector circuit whereby the car may be moved from one null position to the other by operation of said switching means , and including a reversing circuit connected with the selected transducer and with said control means and responsive to overshoot of the null position to reverse the energization of the drive means .
Claim 9
Dependent Claim
199 words
An elevator control system comprising an elevator car and drive means therefor control means connected with said drive means, said control means including a signal device at a reference position on the path of movement of said elevator car, a first transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a first null position, a second transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a second null position, said first and second transducer being spaced apart in the direction of movement, a transducer selector circuit for operatively connecting said first transducer with said control means and effectively disconnecting said second transducer therefrom and switching means connected with the selector circuit whereby the car may be moved from one null position to the other by operation of said switching means , and including a reversing circuit connected with the selected transducer and with said control means and responsive to overshoot of the null position to reverse the energization of the drive means .
Claim 10
Dependent Claim
196 words
An elevator control system comprising an elevator car and drive means therefor, control means connected with said drive means, said control means including a signal device at a reference position on the path of movement of said elevator car, a first transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a first null position, a second transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a second null position, said first and second tranSducer being spaced apart in the direction of movement, a transducer selector circuit for operatively connecting said first transducer with said control means and effectively disconnecting said second transducer therefrom and switching means connected with the selector circuit, wherein each of the transducer means comprises first and second sensors and said signal device comprises two signal elements each coacting with a respective one of said sensors , whereby the car may be moved from one null position to the other by operation of said switching means .
Claim 11
Dependent Claim
196 words
An elevator control system comprising an elevator car and drive means therefor, control means connected with said drive means, said control means including a signal device at a reference position on the path of movement of said elevator car, a first transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a first null position, a second transducer on the car and adapted to coact with said signal device to cause said control means to energize the drive means to move the car to a second null position, said first and second tranSducer being spaced apart in the direction of movement, a transducer selector circuit for operatively connecting said first transducer with said control means and effectively disconnecting said second transducer therefrom and switching means connected with the selector circuit, wherein each of the transducer means comprises first and second sensors and said signal device comprises two signal elements each coacting with a respective one of said sensors , whereby the car may be moved from one null position to the other by operation of said switching means .
Claim 12
Dependent Claim
61 words
The invention as defined in claim 7 wherein said sensors each include a field producing means and a field responsive means in spaced relation to each other and each of said signal elements includes a passive field distorting means adapted to coact with said field producing means and cause operation of the field responsive means when a predetermined positional relationship occurs.
Claim 13
Dependent Claim
46 words
The invention as defined in claim 8 wherein said field producing means comprises a magnet and said field responsive means comprises a magnetically responsive switching means and wherein said field distorting means comprises a member of magnetic material of high permeability relative to that of air.
Claim 14
Dependent Claim
79 words
The invention as defined in claim 7 wherein each of said sensors comprises a permanent magnet and a magnetic field responsive switch with an air gap therebetween and wherein said signal elements comprise a plate of magnetic material adapted to extend into said air gap, each of said switches being adapted to change from a first state to a second state when a plate of magnetic material is disposed in said air gap in a predetermined positional relationship thereto.
References Cited (Backward Citations)
US3402835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |