US3887039A
Expired / Lapsed
US
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Device for controlling a lift or the like
Assignee: Inventio AG
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Filing: 1974-04-08
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Granted: 1975-06-03
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Expires: 1994-04-08
Abstract
Abstract A device for controlling a lift provided with a lift-car which is displaceable along a lift-shaft interconnecting a plurality of storeys, the device comprising drive means responsive to a control signal to displace the lift car along the shaft, a plurality of storey switch devices each associated with a respective storey and each arranged to generate a storey signal when the lift is displaced past the respective switch device, lift-call signal processor means provided with means to store lift-call signals for respective storeys and with stepping means having a respective stage corresponding to each storey, the processor means generating a halt signal when the stepping means reaches a stepping stage corresponding to a storey for which a lift-call signal is stored in the storage means. There is further provided first signal generator means responsive to an initiating signal to generate a control signal which increases towards a predetermined maximum value to control the acceleration of the lift and which - during travel of the lift at its maximum speed is maintained at said predetermined maximum value, second signal generator means for generating a succession of retardation signals each of which initially has a respective maximum value and which decreases in value to correspond at any moment to the maximum lift-car speed permissible for the service of the next servable storey. Comparator means serve to compare the signal generated by the first signal generator with the respectively present retardation signal, the comparator means - the absence of the halt signal - being responsive to a predetermined difference in magnitude between the compared signals to generate a stepping pulse and - in the presence of the halt signal - to apply the respectively present retardation signal to the drive means, the stepping means being stepped on through a switching step on departure of the lift-car from its initial location at the start of each journey and being stepped on through a switching step in response to each stepping pulse generated by the comparator means. The second signal generator means is responsive to each stepping movement of the stepping means to generate a further retardation signal, wherein the second signal generator means comprises means for generating a series of distance-analogue signals each corresponding in magnitude to the distance between storeys immediately successive in the direction of travel of the lift car, means for connecting successive ones of the distanceanalogue signals in a stepwise manner to output means of the distance-analogue signal generator on the occurrence of each stepping movement of the stepping means, means for disconnecting the distance-analogue signals in a stepwise manner from the output means on the occurrence of each storey signal, integrator means for integrating a signal provided by an actual value signal generator mechanically coupled to the drive means, the output signal of the integrator means being of zero value at the beginning of each lift-car journey and being re-set to zero value on the occurrence of each storey signal, difference signal generator means to provide an output signal equal at each instant to the difference between the output signal of the distanceanalogue signal generator and of the integrator means, and root former means having input means connected to the output of the difference signal generator means.
Inventors
- 👤 Klaus Boniek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/28; B66B1/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
535 words
A device for controlling a lift provided with a lift-car which is displaceable along a lift-shaft interconnecting a plurality of storeys, the device comprising drive means responsive to a control signal to displace the lift car along the shaft, a plurality of storey switch devices each associated with a respective storey and each arranged to generate a storey signal when the lift is displaced past the respective switch device, lift-call signal processor means provided with storage means to store lift-call signals for respective storeys and with stepping means having a respective stepping stage corresponding to each storey, the processor means generating a halt signal when the stepping means reaches a stepping stage corresponding to a storey for which a lift-call signal is stored in the storage means, first signal generator means responsive to an initiating signal to generate a control signal which increases towards a predetermined maximum value to control the acceleration of the lift and which - during travel of the lift at its maximum speed -is maintained at said predetermined maximum value, second signal generator means for generating a succession of retardation signals each of which initially has a respective maximum value and which decreases in value to correspond at any moment to the maximum lift-car speed permissible for the service of the next servable storey, comparator means to compare the signal generated by the first signal generator with the respectively present retardation signal, the comparator means - the absence of the halt signal - being responsive to a predetermined difference in magnitude between the compared signals to generate a stepping pulse and - in the presence of the halt signal - to apply the respectively present retardation signal to the drive means, the stepping means being stepped on through a switching step on departure of the lift-car from its initial location at the start of each journey and being stepped on through a switching step in response to each stepping pulse generated by the comparator means, the second signal generator means being responsive to each stepping movement of the stepping means to generate a further retardation signal, wherein the second signal generator means comprises means for generating a series of distance-analogue signals each corresponding in magnitude to the distance between storeys immediately successive in the direction of travel of the lift car, means for connecTing successive ones of the distance-analogue signals in a stepwise manner to output means of the distance-analogue signal generator on the occurrence of each stepping movement of the stepping means, means for disconnecting the distance-analogue signals in a stepwise manner from the output means on the occurrence of each storey signal, integrator means for integrating a signal provided by an actual value signal generator mechanically coupled to the drive means, the output signal of the integrator meane being of zero value at the beginning of each lift-car journey and being re-set to zero value on the occurrence of each storey signal, difference signal generator means to provide an output signal equal at each instant to the difference between the output signal of the distance-analogue signal generator and of the integrator means, and root former means having input means connected to the output of the difference signal generator means.
Claim 2
Independent Claim
535 words
A device for controlling a lift provided with a lift-car which is displaceable along a lift-shaft interconnecting a plurality of storeys, the device comprising drive means responsive to a control signal to displace the lift car along the shaft, a plurality of storey switch devices each associated with a respective storey and each arranged to generate a storey signal when the lift is displaced past the respective switch device, lift-call signal processor means provided with storage means to store lift-call signals for respective storeys and with stepping means having a respective stepping stage corresponding to each storey, the processor means generating a halt signal when the stepping means reaches a stepping stage corresponding to a storey for which a lift-call signal is stored in the storage means, first signal generator means responsive to an initiating signal to generate a control signal which increases towards a predetermined maximum value to control the acceleration of the lift and which - during travel of the lift at its maximum speed -is maintained at said predetermined maximum value, second signal generator means for generating a succession of retardation signals each of which initially has a respective maximum value and which decreases in value to correspond at any moment to the maximum lift-car speed permissible for the service of the next servable storey, comparator means to compare the signal generated by the first signal generator with the respectively present retardation signal, the comparator means - the absence of the halt signal - being responsive to a predetermined difference in magnitude between the compared signals to generate a stepping pulse and - in the presence of the halt signal - to apply the respectively present retardation signal to the drive means, the stepping means being stepped on through a switching step on departure of the lift-car from its initial location at the start of each journey and being stepped on through a switching step in response to each stepping pulse generated by the comparator means, the second signal generator means being responsive to each stepping movement of the stepping means to generate a further retardation signal, wherein the second signal generator means comprises means for generating a series of distance-analogue signals each corresponding in magnitude to the distance between storeys immediately successive in the direction of travel of the lift car, means for connecTing successive ones of the distance-analogue signals in a stepwise manner to output means of the distance-analogue signal generator on the occurrence of each stepping movement of the stepping means, means for disconnecting the distance-analogue signals in a stepwise manner from the output means on the occurrence of each storey signal, integrator means for integrating a signal provided by an actual value signal generator mechanically coupled to the drive means, the output signal of the integrator meane being of zero value at the beginning of each lift-car journey and being re-set to zero value on the occurrence of each storey signal, difference signal generator means to provide an output signal equal at each instant to the difference between the output signal of the distance-analogue signal generator and of the integrator means, and root former means having input means connected to the output of the difference signal generator means.
Claim 3
Independent Claim
535 words
A device for controlling a lift provided with a lift-car which is displaceable along a lift-shaft interconnecting a plurality of storeys, the device comprising drive means responsive to a control signal to displace the lift car along the shaft, a plurality of storey switch devices each associated with a respective storey and each arranged to generate a storey signal when the lift is displaced past the respective switch device, lift-call signal processor means provided with storage means to store lift-call signals for respective storeys and with stepping means having a respective stepping stage corresponding to each storey, the processor means generating a halt signal when the stepping means reaches a stepping stage corresponding to a storey for which a lift-call signal is stored in the storage means, first signal generator means responsive to an initiating signal to generate a control signal which increases towards a predetermined maximum value to control the acceleration of the lift and which - during travel of the lift at its maximum speed is maintained at said predetermined maximum value, second signal generator means for generating a succession of retardation signals each of which initially has a respective maximum value and which decreases in value to correspond at any moment to the maximum lift-car speed permissible for the service of the next servable storey, comparator means to compare the signal generated by the first signal generator with the respectively present retardation signal, the comparator means - the absence of the halt signal - being responsive to a predetermined difference in magnitude between the compared signals to generate a stepping pulse and - in the presence of the halt signal - to apply the respectively present retardation signal to the drive means, the stepping means being stepped on through a switching step on departure of the lift-car from its initial location at the start of each journey and being stepped on through a switching step in response to each stepping pulse generated by the comparator means, the second signal generator means being responsive to each stepping movement of the stepping means to generate a further retardation signal, wherein the second signal generator means comprises means for generating a series of distance-analogue signals each corresponding in magnitude to the distance between storeys immediately successive in the direction of travel of the lift car, means for connecTing successive ones of the distanceanalogue signals in a stepwise manner to output means of the distance-analogue signal generator on the occurrence of each stepping movement of the stepping means, means for disconnecting the distance-analogue signals in a stepwise manner from the output means on the occurrence of each storey signal, integrator means for integrating a signal provided by an actual value signal generator mechanically coupled to the drive means, the output signal of the integrator meane being of zero value at the beginning of each lift-car journey and being re-set to zero value on the occurrence of each storey signal, difference signal generator means to provide an output signal equal at each instant to the difference between the output signal of the distanceanalogue signal generator and of the integrator means, and root former means having input means connected to the output of the difference signal generator means.
Claim 4
Independent Claim
535 words
A device for controlling a lift provided with a lift-car which is displaceable along a lift-shaft interconnecting a plurality of storeys, the device comprising drive means responsive to a control signal to displace the lift car along the shaft, a plurality of storey switch devices each associated with a respective storey and each arranged to generate a storey signal when the lift is displaced past the respective switch device, lift-call signal processor means provided with storage means to store lift-call signals for respective storeys and with stepping means having a respective stepping stage corresponding to each storey, the processor means generating a halt signal when the stepping means reaches a stepping stage corresponding to a storey for which a lift-call signal is stored in the storage means, first signal generator means responsive to an initiating signal to generate a control signal which increases towards a predetermined maximum value to control the acceleration of the lift and which - during travel of the lift at its maximum speed is maintained at said predetermined maximum value, second signal generator means for generating a succession of retardation signals each of which initially has a respective maximum value and which decreases in value to correspond at any moment to the maximum lift-car speed permissible for the service of the next servable storey, comparator means to compare the signal generated by the first signal generator with the respectively present retardation signal, the comparator means - the absence of the halt signal - being responsive to a predetermined difference in magnitude between the compared signals to generate a stepping pulse and - in the presence of the halt signal - to apply the respectively present retardation signal to the drive means, the stepping means being stepped on through a switching step on departure of the lift-car from its initial location at the start of each journey and being stepped on through a switching step in response to each stepping pulse generated by the comparator means, the second signal generator means being responsive to each stepping movement of the stepping means to generate a further retardation signal, wherein the second signal generator means comprises means for generating a series of distance-analogue signals each corresponding in magnitude to the distance between storeys immediately successive in the direction of travel of the lift car, means for connecTing successive ones of the distanceanalogue signals in a stepwise manner to output means of the distance-analogue signal generator on the occurrence of each stepping movement of the stepping means, means for disconnecting the distance-analogue signals in a stepwise manner from the output means on the occurrence of each storey signal, integrator means for integrating a signal provided by an actual value signal generator mechanically coupled to the drive means, the output signal of the integrator meane being of zero value at the beginning of each lift-car journey and being re-set to zero value on the occurrence of each storey signal, difference signal generator means to provide an output signal equal at each instant to the difference between the output signal of the distanceanalogue signal generator and of the integrator means, and root former means having input means connected to the output of the difference signal generator means.
Claim 5
Dependent Claim
91 words
A device as defined in claim 1, wherein the distance-analogue signal generator comprises a plurality of parallel connected branch circuits, each branch circuit corresponding to a respective storey and each comprising a potentiometer, a relay controlled switch means and a resistor connected in series with one another to cause the electrical current flowing in each branch circuit when the respective switch means is rendered conductive to be proprotional to the distance separating the storey corresponding to that branch from the storey immediately successive in the direction of travel of the lift-car.
Claim 6
Dependent Claim
113 words
A device as defined in claim 2, wherein the distance-analogue signal generator comprises a further branch circuit connected in parallel with said first mentioned branch circuit, the further branch circuit comprising a series circuit of a potentiometer, a further relay controlled switch and a resistor, the further branch circuit being associated with a portion of the path of travel of the lift-car which is provided in front of each target storey and which is substantially smaller than the smallest interstorey distance, the further relay controlled switch being actuated at the beginning of travel of the car along said path portion and the integrator being re-set to its zero value simultaneously with such actuation.
Claim 7
Dependent Claim
103 words
A device as defined in claim 3, wherein said integrator means possesses a feedback circuit which comprises two parallel identical branch circuits each including a capacitor, the capacitor in the one identical branch circuit being discharged through a resistor by means of a first relay controlled two-way switch, and the capacitor in the other identical branch circuit being selectively connected in the feedback circuit by a second relay controlled two-way switch, both the first and the second relay controlled two-way switches being simultaneously switchable at the beginning of travel of the lift-car and during the passage of a storey by the lift car.
Claim 8
Dependent Claim
52 words
A device as defined in claim 4, comprising a third relay controlled two-way switch which is simultaneously switchable with the first and second relay controlled two-way switches and by means of which the voltage of the actual value signal generator is connectable to the input of the integrator via a resistive device.
Claim 9
Dependent Claim
14 words
A device as defined in claim 5, wherein the resistive device comprises a potentiometer.
Claim 10
Dependent Claim
49 words
A device as defined in claim 4, wherein the integrator is resettable to its zero value by actuation of the first relay controlled two-way switch simultaneously with the opening of contacts of any one of the relay controlled switch means in the branch circuits of the distance-analogue signal generator.
References Cited (Backward Citations)
US3526300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |