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US3816712A
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Method and apparatus for detecting relative deviations in position of two parts moved in a predetermined desired relationship
Assignee: Carl Zeiss AG
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Filing: 1972-11-13
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Granted: 1974-06-11
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Expires: 1992-11-13
Abstract
Abstract The invention contemplates measurement of displacement deviations between two relatively movable parts, using movement of the respective parts to generate first and second primarypulse trains, wherein the pulses of the first train determine gate-opening functions and the pulses of the second train determine gate-closing functions. A finely divided secondarypulse train is also generated by movement of one of the parts, and the gate determines the number of secondary pulses passed to a counter, for a direct indication of the instantaneous deviation in relative position of the parts.
Inventors
- 👤 K Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/56; G01P3/60; G01M; G01M13/00; G01M13/02; G01M13/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
134 words
The method to detect relative deviations in position of two moving parts which are moved in a predetermined relationship, which method comprises using movement of one of the two parts to generate a first primary-signal train, using movement of the other of the two parts to generate a second primary-signal train, using signals from the first train and from the second train to respectively start and stop a counter, and using movement of said other part to additionally generate secondary pulses (a) at a predetermined higher frequency with respect to that of one of said signal trains, and (b) precisely dependent upon instantaneous position of the said other moving part, said higher-frequency pulses being supplied to said counter as permitted by the start and stop governing action of said first and second signal trains.
Claim 2
Independent Claim
134 words
The method to detect relative deviations in position of two moving parts which are moved in a predetermined relationship, which method comprises using movement of one of the two parts to generate a first primary-signal train, using movement of the other of the two parts to generate a second primary-signal train, using signals from the first train and from the second train to respectively start and stop a counter, and using movement of said other part to additionally generate secondary pulses (a) at a predetermined higher frequency with respect to that of one of said signal trains, and (b) precisely dependent upon instantaneous position of the said other moving part, said higher-frequency pulses being supplied to said counter as permitted by the start and stop governing action of said first and second signal trains.
Claim 3
Dependent Claim
22 words
Method according to claim 1, characterized by the fact that the number of secondary pulses counted into the counter is adjustably variable.
Claim 4
Dependent Claim
183 words
Apparatus for detecting relative deviations in position of two movable parts which are moved in a predetermined intended relationship, comprising a first electric generator connected to one of the two parts and responsive to displacement of said one part to generate a first primary-signal train wherein the signal-train period is solely a function of such displacement of said one part, a second electric generator connected to the other of the two parts and responsive to displacement of said one part to generate a second primary-signal wave train having a period that is solely a function of such displacement of said other part, a third electric generator responsive to displacement of said other part and generating pulses of predetermined higher frequency with respect to that of one of said generators, pulse-counter means, and means including a gate connecting said counter means to said third generator for counting the number of the higher-frequency pulses in a given gated interval, said gate including an opening control connection to the output of said first generator and a closing control connection to the output of said second generator.
Claim 5
Dependent Claim
183 words
Apparatus for detecting relative deviations in position of two movable parts which are moved in a predetermined intended relationship, comprising a first electric generator connected to one of the two parts and responsive to displacement of said one part to generate a first primary-signal train wherein the signal-train period is solely a function of such displacement of said one part, a second electric generator connected to the other of the two parts and responsive to displacement of said one part to generate a second primary-signal wave train having a period that is solely a function of such displacement of said other part, a third electric generator responsive to displacement of said other part and generating pulses of predetermined higher frequency with respect to that of one of said generators, pulse-counter means, and means including a gate connecting said counter means to said third generator for counting the number of the higher-frequency pulses in a given gated interval, said gate including an opening control connection to the output of said first generator and a closing control connection to the output of said second generator.
Claim 6
Dependent Claim
24 words
Device according to claim 3, characterized by the fact that said first and second generators are of the variety producing strictly sinusoidally varying signals.
Claim 7
Dependent Claim
29 words
Device according to claim 3, characterized by the fact that the pulse generator is so established that it is independent of variations in amplitude of the primary signals fed.
Claim 8
Dependent Claim
22 words
Device according to claim 3, characterized by the fact that an adjustable pulse divider is interposed between pulse generator and pulse counter.
Claim 9
Dependent Claim
27 words
Device according to claim 3, characterized by the fact that the pulse counter is so developed that it automatically to zero after a predetermined number of steps.
Claim 10
Dependent Claim
26 words
Device according to claim 3, characterized by the fact that at least one of the pulse dividers is variable for a short time in its adjustment.
Claim 11
Dependent Claim
24 words
Device according to claim 3, further including means for storing the output of said counter means, and read-out means for reading-out the stored value.
Claim 12
Dependent Claim
14 words
Device according to claim 9, in which said read-out means includes a moving-chart recorder.
Claim 13
Dependent Claim
14 words
Device according to claim 9, in which said read-out means includes a digital-to-analog converter.
References Cited (Backward Citations)
US3178562A
Cited
US3564219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |