Patent US1863302A successfully refreshed from Google Patents.
Patent US3617873A successfully refreshed from Google Patents.
US3617873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for generating switching window for plated wire
Assignee: Boeing North American Inc
•
Filing: 1969-12-22
•
Granted: 1971-11-02
•
Expires: 1989-12-22
Abstract
Abstract Counters are used to sweep word and bit currents for a plated wire sample in a synchronous incremental manner over a matrix in an X-Y plane. The output from the plated wire at each X-Y coordinate is compared with a reference voltage. If the output voltage is less than the reference voltage, a dot is generated on a display oscilloscope. If the voltage is in excess of the reference voltages, the dot is blanked out. The sweeping continues until the wire has been tested for all values of word and bit current. The switching window display (area of blanked dots) on the oscilloscope is thereby generated automatically.
Inventors
- 👤 Glenn W Murray
- 👤 Bruce A Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:38
CPC Classifications
G; G11; G11C; G11C29/00; G11C29/02; G11C29/025; G06; G06F; G06F11/00; G06F11/30; G06F11/32; G06F11/321; G06F11/322; G11C29/04; G11C29/50; G11C2029/5004; G11C2029/5006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
A process for automatically generating a display of the response of a plated memory wire to drive currents, said process comprising the steps of, applying word and bit drive currents to test the magnetic characteristics of said plated memory wire, sequentially changing the amplitudes of said word and bit drive currents over a matrix of values in an X-Y plane, measuring the output voltage from said wire for each value of the word and bit drive currents, comparing the output voltage with a reference voltage to determine the difference between the output voltage and the reference voltage, using the results of said comparison to control an oscilloscope display, if said output voltage is less than the reference voltage, a dot is generated by the scope which corresponds to a particular X-Y coordinate, if the voltage is in excess of the reference voltage, the dot on said scope is blanked out for that particular X-Y coordinate, said process being continued until response of said wire has been measured and a display generated for each X-Y coordinate, at the completion of said pRocess, said display indicating the switching window of the plated wire being tested.
Claim 2
Dependent Claim
193 words
A process for automatically generating a display of the response of a plated memory wire to drive currents, said process comprising the steps of, applying word and bit drive currents to test the magnetic characteristics of said plated memory wire, sequentially changing the amplitudes of said word and bit drive currents over a matrix of values in an X-Y plane, measuring the output voltage from said wire for each value of the word and bit drive currents, comparing the output voltage with a reference voltage to determine the difference between the output voltage and the reference voltage, using the results of said comparison to control an oscilloscope display, if said output voltage is less than the reference voltage, a dot is generated by the scope which corresponds to a particular X-Y coordinate, if the voltage is in excess of the reference voltage, the dot on said scope is blanked out for that particular X-Y coordinate, said process being continued until response of said wire has been measured and a display generated for each X-Y coordinate, at the completion of said pRocess, said display indicating the switching window of the plated wire being tested.
Claim 3
Dependent Claim
35 words
The process recited in claim 1 wherein the output voltage is compared with reference voltages representing upper and lower voltage limits for testing the output voltage response from the wire over the X-Y matrix plane.
Claim 4
Dependent Claim
70 words
The process recited in claim 1 wherein the reference voltage is set to a value corresponding to a predetermined reduction in output voltage representing a lower operating limit, said wire is tested through a range of drive current values by applying inversely changing word and bit currents, the output of the wire is compared with said reference voltage and the results used to plot the creep threshold of said wire.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |