Patent US1257110A successfully refreshed from Google Patents.
Patent US3928790A successfully refreshed from Google Patents.
US3928790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating process and device
Assignee: Precitec GmbH and Co KG
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Filing: 1974-06-11
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Granted: 1975-12-23
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Expires: 1994-06-11
Abstract
Abstract In a device for maintaining a constant distance between a tool and the surface of a workpiece, the tool distance is determined by a sensing element and compared with a desired distance. The resultant error signal is used to correct the deviation. When the tool is moved toward the workpiece, the total movement is compared to a predetermined maximum. If the predetermined maximum is exceded, the tool is moved away from the work piece to this position and maintained until the sensing element senses a decrease of the distance between the tool and the workpiece.
Inventors
- 👤 Karl Heinz Schmall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:16
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/10; B23K7/102; B23Q; B23Q15/00; B23Q15/20; B23Q15/22; B23Q15/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
199 words
A regulating process for the carrying out the process for maintaining substantially constant the distance of a tool from a work piece to be processed having an uneven surface over which the tool is moved parallel to the surface, particularly for the distance regulation of the torch of a torch-cutting device from the work piece, the tool distance being determined by a sensing element, compared with the desired factor and the thus-determined deviation fed to a regulator, which, depending on this, emits regulating signals to a correcting element, which shifts the tool toward the work piece or away from the work piece, depending on the direction of the deviation, characterized in that in the initiation of a movement of the correcting element directed toward the work piece, the course of the tool to the correcting element is accumulatively determined, that the accumulated value is compared with the predetermined maximum factor, on exceeding the predetermined maximum factor, the tool is stopped and then is moved by in accordance with the predetermined maximum factor again away from the work piece and is maintained in this position until the sensing element determines a decrease of the distance between tool and work piece.
Claim 2
Dependent Claim
199 words
A regulating process for the carrying out the process for maintaining substantially constant the distance of a tool from a work piece to be processed having an uneven surface over which the tool is moved parallel to the surface, particularly for the distance regulation of the torch of a torch-cutting device from the work piece, the tool distance being determined by a sensing element, compared with the desired factor and the thus-determined deviation fed to a regulator, which, depending on this, emits regulating signals to a correcting element, which shifts the tool toward the work piece or away from the work piece, depending on the direction of the deviation, characterized in that in the initiation of a movement of the correcting element directed toward the work piece, the course of the tool to the correcting element is accumulatively determined, that the accumulated value is compared with the predetermined maximum factor, on exceeding the predetermined maximum factor, the tool is stopped and then is moved by in accordance with the predetermined maximum factor again away from the work piece and is maintained in this position until the sensing element determines a decrease of the distance between tool and work piece.
Claim 3
Dependent Claim
72 words
A process of claim 1, characterized in that the movement of the tool toward the work piece is timed, that upon reaching a predetermined maximum time value factor, the direction of drive of the correcting element is reversed and is moved away from the work piece during a time corresponding to the predetermined measured time value factor at the same rate of speed as in the forward movement and then is stopped.
Claim 4
Dependent Claim
49 words
A process of claim 1, characterized in that in the reversal of direction and in the stopping of the correcting element, the regulator is switched off and maintained in a deactivated state until the differentiation of the sensing signal shows an approach of the tool to the work piece.
Claim 5
Dependent Claim
51 words
A process of claim 1 with speed-variable tool advance parallel to the work piece surface, characterized in that the predetermined maximum factor, at the attainment of which the tool is moved away from the work piece by the correcting element is changed depending on the advance speed and the reverse speed.
Claim 6
Dependent Claim
93 words
A process of claim 1 with a correcting element controllable by impulses and adjustable in proportion to the impulse count, characterized in that the impulses are counted during a guidance of the correcting element directed toward the work piece to obtain the maximum predetermined factor, and that upon exceeding the maximum predetermined factor the correcting element is affected with driving impulses in the opposite direction for such a period of time until the number of impulses accumulated during the movement toward the work piece to obtain the maximum predetermined factor has been reached.
Claim 7
Dependent Claim
91 words
A process of claim 1 with correcting element controllable by analog signals and deflectable in proportion to the signal duration and/or signal amplitude, characterized in that the analog signals are integrated and stored during the guidance of the correcting element directed toward the work piece to obtain the maximum predetermined factor, and that upon exceeding the maximum predetermined factor, the correcting member is fed in the opposite direction analog signals of such amplitude until the maximum predetermined factor accumulated and stored during the movement toward the work piece has been achieved.
Claim 8
Independent Claim
198 words
A device for maintaining substantially constant the distance of a tool from a work piece to be processed having an uneven surface over which the tool is moved parallel to the surface, particularly for the distance regulation of the torch of a torch-cutting device from the work piece, the tool distance being determined by a sensing element, compared with the desired factor and the Thus-determined deviation fed to a regulator, which, depending on this, emits regulating signals to a correcting element, which shifts the tool toward the work piece or away from the work piece, depending on the direction of the deviation, by means of a regulating circuit having a sensing element, comparator, regulator and correcting element, characterized in that connected to the regulator output, parallel to the correcting element, is a measuring device for determining and storing the correcting signals, that the measuring device is connected to a comparator for determining the maximum predetermined factor, which in turn with a switching device for separating the correcting element from the regulator and for feeding to the correcting element the correcting signals of reversed driving direction corresponding to the stored maximum predetermined factor, is connected with the correcting element.
Claim 9
Independent Claim
198 words
A device for maintaining substantially constant the distance of a tool from a work piece to be processed having an uneven surface over which the tool is moved parallel to the surface, particularly for the distance regulation of the torch of a torch-cutting device from the work piece, the tool distance being determined by a sensing element, compared with the desired factor and the Thus-determined deviation fed to a regulator, which, depending on this, emits regulating signals to a correcting element, which shifts the tool toward the work piece or away from the work piece, depending on the direction of the deviation, by means of a regulating circuit having a sensing element, comparator, regulator and correcting element, characterized in that connected to the regulator output, parallel to the correcting element, is a measuring device for determining and storing the correcting signals, that the measuring device is connected to a comparator for determining the maximum predetermined factor, which in turn with a switching device for separating the correcting element from the regulator and for feeding to the correcting element the correcting signals of reversed driving direction corresponding to the stored maximum predetermined factor, is connected with the correcting element.
Claim 10
Dependent Claim
114 words
A device of claim 7 characterized in that the output of the comparator is connected to the first-mentioned switching device, which, for the activation of a time measuring device on the occurrence of signals corresponding to an approach of the tool to the work piece, is connected to the latter, that the measuring device in turn is connected with a comparator connected with a maximum predetermined factor setter, and that the comparator is connected to a second switching device for the opening of a switch in the connecting lead between comparator and regulator and for activating a control device connected with the input of a regulator upon the achievement of the maximum predetermined factor.
Claim 11
Dependent Claim
63 words
A device of claim 8, characterized in that the output of the comparator is connected to a differential element whose output is mounted at the second switching device in such a manner that on the initiation of a signal picked up by the differentiating element corresponding to an approach between tool and work piece, the switch between comparator and regulator is again closed.
Claim 12
Dependent Claim
46 words
A device of claim 8 with a guidance for changing the speed of the tool advance occurring parallel to the work piece, characterized in that the guidance for the reverse proportional adjustment of the maximum predetermined factor setter is connected with it on changes of speed.
Claim 13
Dependent Claim
54 words
A device in accordance with claim 7 wherein an oscillatory circuit is provided and the frequency of the oscillatory circuit is determined by the distance of sensing element and work piece, characterized in that the comparator is constructed and arranged as a discriminator whose output signals are directed to the input of the regulator.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |