US3281804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Redundant digital data storage system
Assignee: Individual
•
Filing: 1961-08-03
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Granted: 1966-10-25
•
Expires: 1981-08-03
Abstract
No abstract record available.
Inventors
- 👤 Dirks Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:30
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/1608; G06F11/1612; G11; G11B; G11B20/00; G11B20/10; G11B20/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
242 words
APPARATUS FOR RECORDING DATA ON A RECORDING MEDIUM IN A FORM ADAPTED FOR CHECKING COMPRISING, IN COMBINATION, A FIRST RECORDING HEAD POSITIONED IN OPERATIVE PROXIMITY WITH SAID RECORDING MEDIUM; A SECOND RECORDING HEAD POSITIONED IN OPERATIVE PROXIMITY WITH SAID RECORDING MEDIUM IN SPACED RELATION TO SAID FIRST RECORDING HEAD; TIMING SIGNAL MEANS FOR PROVIDING TIMING SIGNALS; A FIRST GATE HAVING AN INPUT CONNECTED TO SAID TIMING SIGNAL MEANS, AN OUTPUT CONNECTED TO SAID FIRST RECORDING HEAD AND CONDUCTION CONTROL MEANS, SAID FIRST GATE BEING ADAPTED TO MAINTAIN UNDER THE CONTROL OF SAID CONDUCTION CONTROL MEANS ONE OF AN OPEN CONDITION IN WHICH SAID GATE CONDUCTS A SIGNAL FROM THE INPUT TO THE OUTPUT THEREOF AND A CLOSED CONDITION IN WHICH SAID GATE BLOCKS A SIGNAL; A SECOND GATE HAVING AN INPUT CONNECTED TO SAID TIMING SIGNAL MEANS, AN OUTPUT CONNECTED TO SAID SECOND RECORDING HEAD AND CONDUCTION CONTROL MEANS, SAID SECOND GATE BEING ADAPTED TO MAINTAIN UNDER THE CONTROL OF SAID CONDUCTION CONTROL MEANS ONE OF AN OPEN CONDITION IN WHICH SAID GATE CONDUCTS A SIGNAL FROM THE INPUT TO THE OUTPUT THEREOF AND A CLOSED CONDITION IN WHICH SAID GATE BLOCKS A SIGNAL; DATA INPUT MEANS FOR PROVIDING DATA SIGNALS; AND TRANSFER CONTROL MEANS CONNECTED BETWEEN SAID DATA INPUT MEANS AND THE CONDUCTION CONTROL MEANS OF EACH OF SAID FIRST AND SECOND GATES FOR CONTROLLING THE CONDITION OF EACH OF SAID FIRST AND SECOND GATES IN ACCORDANCE WITH SAID DATA SIGNALS.
Claim 2
Dependent Claim
242 words
APPARATUS FOR RECORDING DATA ON A RECORDING MEDIUM IN A FORM ADAPTED FOR CHECKING COMPRISING, IN COMBINATION, A FIRST RECORDING HEAD POSITIONED IN OPERATIVE PROXIMITY WITH SAID RECORDING MEDIUM; A SECOND RECORDING HEAD POSITIONED IN OPERATIVE PROXIMITY WITH SAID RECORDING MEDIUM IN SPACED RELATION TO SAID FIRST RECORDING HEAD; TIMING SIGNAL MEANS FOR PROVIDING TIMING SIGNALS; A FIRST GATE HAVING AN INPUT CONNECTED TO SAID TIMING SIGNAL MEANS, AN OUTPUT CONNECTED TO SAID FIRST RECORDING HEAD AND CONDUCTION CONTROL MEANS, SAID FIRST GATE BEING ADAPTED TO MAINTAIN UNDER THE CONTROL OF SAID CONDUCTION CONTROL MEANS ONE OF AN OPEN CONDITION IN WHICH SAID GATE CONDUCTS A SIGNAL FROM THE INPUT TO THE OUTPUT THEREOF AND A CLOSED CONDITION IN WHICH SAID GATE BLOCKS A SIGNAL; A SECOND GATE HAVING AN INPUT CONNECTED TO SAID TIMING SIGNAL MEANS, AN OUTPUT CONNECTED TO SAID SECOND RECORDING HEAD AND CONDUCTION CONTROL MEANS, SAID SECOND GATE BEING ADAPTED TO MAINTAIN UNDER THE CONTROL OF SAID CONDUCTION CONTROL MEANS ONE OF AN OPEN CONDITION IN WHICH SAID GATE CONDUCTS A SIGNAL FROM THE INPUT TO THE OUTPUT THEREOF AND A CLOSED CONDITION IN WHICH SAID GATE BLOCKS A SIGNAL; DATA INPUT MEANS FOR PROVIDING DATA SIGNALS; AND TRANSFER CONTROL MEANS CONNECTED BETWEEN SAID DATA INPUT MEANS AND THE CONDUCTION CONTROL MEANS OF EACH OF SAID FIRST AND SECOND GATES FOR CONTROLLING THE CONDITION OF EACH OF SAID FIRST AND SECOND GATES IN ACCORDANCE WITH SAID DATA SIGNALS.
References Cited (Backward Citations)
US2813259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |