US3886503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for storing high frequency signals
Assignee: Thales SA
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Filing: 1974-01-28
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Granted: 1975-05-27
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Expires: 1994-01-28
Abstract
Abstract A memory device including a piezoelectric delay line along the surface of which travels acoustic waves to be put into memory; an electron gun which sweeps the work surface of the line with a beam of electrons for recording or reading out the wave; and in which this work surface is covered at least in part by a layer of a highly resistive material.
Inventors
- 👤 Alain Bert
- 👤 Gerard Kantorowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:48
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/42; G; G10; G10K; G10K11/00; G10K11/36; G11; G11C; G11C13/00; G11C13/04; G11C13/047; G11C8/00; G11C8/005; H03H9/02; H03H9/02535; H03H9/02637; H03H9/02779; H03H9/02787; H03H9/02645
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A device for storing travelling surface waves comprising, inside a vacuum tight enclosure; a delay line of strongly piezoelectric material having transducers mounted thereon and separated from one another, for transducing high frequency electric signals into acoustic waves and vice-versa, said acoustic waves propagating along a work surface of said line between said transducers; and an electron gun for directing a beam of primary electrons toward said work surface; said work surface of said delay line being covered with a thin layer of electrically insulating material; and said thin layer having deposited on it a plurality of bands parallel to the direction of acoustic wave travel along said line, said bands being made of a material having a high coefficient of secondary emission.
Claim 2
Independent Claim
123 words
A device for storing travelling surface waves comprising, inside a vacuum tight enclosure; a delay line of strongly piezoelectric material having transducers mounted thereon and separated from one another, for transducing high frequency electric signals into acoustic waves and vice-versa, said acoustic waves propagating along a work surface of said line between said transducers; and an electron gun for directing a beam of primary electrons toward said work surface; said work surface of said delay line being covered with a thin layer of electrically insulating material; and said thin layer having deposited on it a plurality of bands parallel to the direction of acoustic wave travel along said line, said bands being made of a material having a high coefficient of secondary emission.
Claim 3
Independent Claim
107 words
A device fo storing travelling surface waves comprising, inside a vacuum tight enclosure; a delay line of strongly piezoelectric material having transducers mounted thereon and separated from one another, for transducing high-frequency-electric signals into acoustic waves and vice-versa, said acoustic waves propagating along a work surface of said line between said transducers; and an electron gun for directing a beam of primary electrons toward said work surface; said work surface of said delay line being covered with a thin layer of electrically insulating material; and said thin layer having deposited on it a plurality of disks made of a material having a high coefficient of secondary emission.
Claim 4
Independent Claim
107 words
A device fo storing travelling surface waves comprising, inside a vacuum tight enclosure; a delay line of strongly piezoelectric material having transducers mounted thereon and separated from one another, for transducing high-frequency-electric signals into acoustic waves and vice-versa, said acoustic waves propagating along a work surface of said line between said transducers; and an electron gun for directing a beam of primary electrons toward said work surface; said work surface of said delay line being covered with a thin layer of electrically insulating material; and said thin layer having deposited on it a plurality of disks made of a material having a high coefficient of secondary emission.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |