Patent US3328801A successfully refreshed from Google Patents.
US3328801A
Expired / Lapsed
US
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Chart reading and recording apparatus
Assignee: D Mac Ltd
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Filing: 1966-03-25
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Granted: 1967-06-27
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Expires: 1986-03-25
Abstract
No abstract record available.
Inventors
- 👤 Boyle Archibald Raymond
- 👤 Dobbin Donald Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/22; G06K11/00; G06K11/02; G21; G21D; G21D5/00; G21D5/02; Y; Y02; Y02E; Y02E30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
APPARATUS FOR READING AND RECORDING POSITIONS AND/ OR THE SHAPES OF LINES ON A CHART, THE APPARATUS COMPRISING A MANUALLY OPERABLE MAGNETIC DEVICE FOR INDICATING POSITIONS AND/OR FOLLOWING LINES ON A CHART, SENSING MEANS FOR DISPOSITION ON THE OTHER SIDE OF THE CHART FROM SAID MAGNETIC DEVICE AND FOR PRODUCING A DIFFERENTIAL SIGNAL IN ACCORDANCE WITH THE RELATIVE POSITION OF SAID MAGNETIC DEVICE AND SENSING MEANS, A SERVO-MECHANISM OPERABLY ASSOCIATED WITH THE SENSING MEANS AND OPERABLE IN RESPONSE TO SAID DIFFERENTIAL SIGNAL TO EFFECT MOVEMENT OF THE SENSING MEANS IN A DIRECTION TO REDUCE SAID DIFFERENTIAL SIGNAL, SAID SERVO-MECHANISM INCLUDING A GANTRY AND TROLLEY ARRANGEMENT ELECTRICALLY OPERABLE IN X AND Y AXES AND CARRYING THE SENSING MEANS, AND MEANS OPERABLE BY OUTPUT SIGNALS FROM THE SERVO-MECHANISM TO PRODUCE A RECORD OF THE MOVEMENT OF THE SENSING MEANS.
Claim 2
Dependent Claim
137 words
APPARATUS FOR READING AND RECORDING POSITIONS AND/ OR THE SHAPES OF LINES ON A CHART, THE APPARATUS COMPRISING A MANUALLY OPERABLE MAGNETIC DEVICE FOR INDICATING POSITIONS AND/OR FOLLOWING LINES ON A CHART, SENSING MEANS FOR DISPOSITION ON THE OTHER SIDE OF THE CHART FROM SAID MAGNETIC DEVICE AND FOR PRODUCING A DIFFERENTIAL SIGNAL IN ACCORDANCE WITH THE RELATIVE POSITION OF SAID MAGNETIC DEVICE AND SENSING MEANS, A SERVO-MECHANISM OPERABLY ASSOCIATED WITH THE SENSING MEANS AND OPERABLE IN RESPONSE TO SAID DIFFERENTIAL SIGNAL TO EFFECT MOVEMENT OF THE SENSING MEANS IN A DIRECTION TO REDUCE SAID DIFFERENTIAL SIGNAL, SAID SERVO-MECHANISM INCLUDING A GANTRY AND TROLLEY ARRANGEMENT ELECTRICALLY OPERABLE IN X AND Y AXES AND CARRYING THE SENSING MEANS, AND MEANS OPERABLE BY OUTPUT SIGNALS FROM THE SERVO-MECHANISM TO PRODUCE A RECORD OF THE MOVEMENT OF THE SENSING MEANS.
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |