US3567990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic imaging apparatus
Assignee: Bankers Trust Co
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Filing: 1969-06-02
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Granted: 1971-03-02
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Expires: 1989-06-02
Abstract
Abstract An imaging receiving and writing tube includes a cylindrical evacuated envelope having an electron gun in one end wall and a wire mosaic in the other. A deflection apparatus is provided to control the electron stream sweep. Clips are mounted near the end having the wire mosaic, the clips being designed to hold any one of several piezoelectric crystal plates having different thicknesses. A collector electrode contained within the envelope cooperates with the mosaic and transducer to provide image signals. The device can operate as a display or writing device with the transducer removed. In another embodiment the selected crystal plate is temporarily and removably adhered with a thin coating of silicone compound or the like.
Inventors
- 👤 Roy R Whymark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:38
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/495; H01J29/00; H01J29/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
165 words
An apparatus for converting pressure patterns into electrical signals representative of the pattern comprising the combination of: an evacuated envelope; an electron source mounted in said envelope; means for forming electrons emanating from Said source into a stream and for controlling the direction of the stream; a wire mosaic plate mounted in one wall of said envelope with one active surface exposed; a plurality of piezoelectric transducers each having one major surface at which an electrical charge pattern appears in response to a physical stress pattern imposed on a second major surface; and retaining means mounted on the structure including said envelope and said wire mosaic plate for removably holding a selected one of said transducers adjacent said mosaic plate with said one major surface in contact with the exposed surface of said mosaic plate; said mosaic plate being operative to transfer charge patterns appearing on said one major surface of said transducer to the interior of said envelope for investigation with said electron stream.
Claim 2
Independent Claim
165 words
An apparatus for converting pressure patterns into electrical signals representative of the pattern comprising the combination of: an evacuated envelope; an electron source mounted in said envelope; means for forming electrons emanating from Said source into a stream and for controlling the direction of the stream; a wire mosaic plate mounted in one wall of said envelope with one active surface exposed; a plurality of piezoelectric transducers each having one major surface at which an electrical charge pattern appears in response to a physical stress pattern imposed on a second major surface; and retaining means mounted on the structure including said envelope and said wire mosaic plate for removably holding a selected one of said transducers adjacent said mosaic plate with said one major surface in contact with the exposed surface of said mosaic plate; said mosaic plate being operative to transfer charge patterns appearing on said one major surface of said transducer to the interior of said envelope for investigation with said electron stream.
Claim 3
Dependent Claim
34 words
An apparatus according to claim 1 and further comprising: a collector electrode mounted within said envelope to detect changes in electron flow within said envelope due to a charge pattern on said mosaic plate.
Claim 4
Dependent Claim
57 words
Apparatus according to claim 1 wherein said mosaic plate comprises: a glass body in the shape of a cylinder having two major surfaces perpendicular to the cylinder axis; and a large plurality of small diameter wires embedded in said glass body; said wires extending parallel to each other and to said cylinder axis between said major surfaces.
Claim 5
Dependent Claim
87 words
Apparatus according to claim 1 wherein: said envelope is in the form of a right circular cylinder having a circular end wall and an open end; said electron source being mounted in said end wall; said mosaic plate is circular and is mounted at the open end of said envelope to form a second end wall; and said retaining means is mounted on said envelope near said open end and extends axially beyond said mosaic and radially inwardly across said mosaic in position to retain said transducer.
Claim 6
Dependent Claim
53 words
Apparatus according to claim 1 wherein: said retaining means comprises: a plurality of resilient clips secured to the structure including said envelope and said mosaic plate; said clips extending across said exposed surface of said mosaic plate in position to grip and hold a transducer placed in contiguous relationship with said exposed surface.
Claim 7
Dependent Claim
330 words
Apparatus according to claim 1 wherein: said plurality of transducers comprises: a selection of cylindrical bodies of piezoelectric material; each said body having first and second major parallel surfaces axially separated by the body thickness; said bodies being of different thicknesses to provide a selection of primary operating frequencies. 7 An apparatus for converting pressure patterns into electrical signals representative of the pattern comprising the combination of; an evacuated envelope; an electron source mounted in said envelope; means for forming electrons emanating from said source into a stream and for controlling the direction of the stream; a wire mosaic plate mounted in one wall of said envelope with one active surface exposed interiorly of said envelope and a second active surface exposed exteriorly of said envelope; a plurality of piezoelectric transducers each having one major surface at which an electrical charge pattern appears in response to a physical stress pattern imposed on a second major surface; retaining means mounted on the structure including said envelope and said wire mosaic plate for removably holding a selected on eof said transducers adjacent said mosaic plate with said one major surface in contact with the exteriorly expose surface of said mosaic plate; said mosaic plate being operative to transfer charge patterns appearing on said one major surface of said transducer to the interior of said envelope for investigation with said electron stream; a collector electrode mounted within said envelope near said interiorly exposed surface of said mosaic plate; first circuit means connected tO said means for controlling the direction of the electron stream for causing said stream to scan said mosaic in a predetermined pattern; second circuit means connected to said collector electrode for detecting voltage variations produced therein and for developing a signal representative of intensity variations representative of physical stress variations at said transducer; and third circuit means connected to said first and second circuit means for correlating location and intensity signals to produce a pattern equivalent to said stress pattern.
Claim 8
Independent Claim
153 words
An apparatus for converting pressure patterns into electrical signals representative of the pattern comprising the combination of: an evacuated envelope; an electron source mounted in said envelope; means for forming electrons emanating from said source into a stream and for controlling the direction of the stream; a wire mosaic plate mounted in one wall of said envelope with one active surface exposed; a plurality of piezoelectric transducers each having one major surface at which an electrical charge pattern appears in response to a physical stress pattern imposed on a second major surface; and means for removably holding a selected one of said transducers adjacent said mosaic plate with said one major surface in contact with the exposed surface of said plate; said mosaic plate being operative to transfer charge patterns appearing on said on em one major surface of said transducer to the interior of said envelope for investigation with said electron stream.
Claim 9
Independent Claim
153 words
An apparatus for converting pressure patterns into electrical signals representative of the pattern comprising the combination of: an evacuated envelope; an electron source mounted in said envelope; means for forming electrons emanating from said source into a stream and for controlling the direction of the stream; a wire mosaic plate mounted in one wall of said envelope with one active surface exposed; a plurality of piezoelectric transducers each having one major surface at which an electrical charge pattern appears in response to a physical stress pattern imposed on a second major surface; and means for removably holding a selected one of said transducers adjacent said mosaic plate with said one major surface in contact with the exposed surface of said plate; said mosaic plate being operative to transfer charge patterns appearing on said on em one major surface of said transducer to the interior of said envelope for investigation with said electron stream.
Claim 10
Dependent Claim
46 words
Apparatus according to claim 8 wherein said means for removably holding a selected on eof said transducers comprises: a thin coating of a spreadable, water insoluble, electrically nonconductive nonhardening substance having a smooth homogeneous texture between said selected one of said transducers and said mosaic plate.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 9 wherein said spreadable substance is petroleum jelly.
Claim 12
Independent Claim
104 words
A method of temporarily and removably adhering a flat surface of a piezoelectric transducer to a flat surface of a wire mosaic plate comprising: coating one of the flat surfaces with a thin layer of a spreadable, water insoluble, electrically nonconductive, nonhardening substance having a smooth homogeneous texture; placing the flat surface of the transducer parallel to and in slightly overlapping contacting relationship with the flat surface of the mosaic plate; and sliding the transducer across the mosaic plate in a direction to increase the overlap until the entire flat surface of the transducer is contiguous with the flat surface of the mosaic plate.
Claim 13
Independent Claim
104 words
A method of temporarily and removably adhering a flat surface of a piezoelectric transducer to a flat surface of a wire mosaic plate comprising: coating one of the flat surfaces with a thin layer of a spreadable, water insoluble, electrically nonconductive, nonhardening substance having a smooth homogeneous texture; placing the flat surface of the transducer parallel to and in slightly overlapping contacting relationship with the flat surface of the mosaic plate; and sliding the transducer across the mosaic plate in a direction to increase the overlap until the entire flat surface of the transducer is contiguous with the flat surface of the mosaic plate.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |