US3600936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transceiver ultrasonic image system
Assignee: VITRO Corp A CORP OF DE
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Filing: 1968-04-01
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Granted: 1971-08-24
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Expires: 1988-04-01
Abstract
Abstract A high conductance cathode-ray tube for ultrasonic applications employing a continuous piezoelectric conversion face plate capable of generating ultrasonic signals when swept by a cathoderay beam, as well as accepting reflected ultrasonic echo signals which modulate the cathode-ray beam to obtain electronic manifestations of the received signals, and method of using same. A two-gun tube modification, one gun utilized for signal emission and the other for signal reception, in conjunction with a common piezoelectric plate, is also disclosed.
Inventors
- 👤 William R Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/56; G01S7/62; G01S7/6218; H; H01; H01J; H01J31/00; H01J31/08; H01J31/495
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
60 words
The method of generating and transmitting ultrasonic signals comprising the steps of a. Installing a piezoelectric conversion medium at the face of a cathode-ray tube, b. Providing a cathode-ray gun in said tube, and c. Impinging a cathode-ray beam on said medium, whereby electric energy of said beam is converted into mechanical vibration in the ultrasonic range, and emitted therefrom.
Claim 2
Independent Claim
60 words
The method of generating and transmitting ultrasonic signals comprising the steps of a. Installing a piezoelectric conversion medium at the face of a cathode-ray tube, b. Providing a cathode-ray gun in said tube, and c. Impinging a cathode-ray beam on said medium, whereby electric energy of said beam is converted into mechanical vibration in the ultrasonic range, and emitted therefrom.
Claim 3
Dependent Claim
37 words
The method of claim 1 in which the conversion medium comprises a continuous face plate, the further step of sweeping said beam over said plate whereby successive discrete areas impinged by the beam function as individual transducers.
Claim 4
Dependent Claim
21 words
The method of claim 2 including the further step of controlling the sweep of the beam in a selective stepped sequence.
Claim 5
Dependent Claim
69 words
The method according to claim 2 in which said cathode-ray tube is utilized in a reciprocal mode of operation to both transmit and receive ultrasonic signals, the further steps of installing a signal pickup grid between said gun and conversion plate in proximity of the latter, generating an electronic signal thereon in the area of impingement by the cathode-ray beam, and transmitting said electronic signals to a video-processing system.
Claim 6
Dependent Claim
41 words
The method set forth in claim 4, including the step of providing a negative capacitance network and connecting it to the grid, to cancel the capacitance at discrete elements of the conversion medium and thereby increase the efficiency of signal conversion.
Claim 7
Dependent Claim
36 words
The method set forth in claim 5, including the step of proportioning the value of negative capacitance, beam conductance and termination conductance so as to reduce the Q factor of discrete element of the conversion medium.
Claim 8
Dependent Claim
30 words
A method according to claim 4 including the step of providing a raster means and controlling the stepping of the cathode-ray beam for concomittant generation and reception of ultrasonic signals.
Claim 9
Dependent Claim
32 words
The method of claim 5 including the further step of providing gating Means operating in synchronism with the raster means for separating the transmitting and receiving functions effected by the cathode-ray beam.
Claim 10
Dependent Claim
36 words
The method of claim 8 including the further step of controlling the gating means so as to delay the signal reception with respect to signal transmission, whereby the cathode-ray tube may operate in a reflective mode.
Claim 11
Dependent Claim
30 words
The method of claim 9 including the further step of varying the delay by the gating means to thereby vary the time spacing and control the effective plane of reflection.
Claim 12
Dependent Claim
32 words
The method according to claim 8 wherein the raster is operated in variable interspersed relations with respect to different areas of the conversion plate in combined transmitting and receiving mode of operation.
Claim 13
Dependent Claim
50 words
The method of claim 5 including the step of placing the conversion plate in contact with an ultrasonic conductive medium, placing an object to be examined in line of transmission of signals by said plate in contact with said medium and recapturing the echo signals returned thereby by said plate.
Claim 14
Dependent Claim
37 words
The method of claim 12, including the steps of interposing a focusing lens between said conversion plate and object and adjusting the position of said lens along the signal beam to vary the effective plane under examination.
Claim 15
Dependent Claim
14 words
The method of claim 13 in which the ultrasonic conductive medium is a fluid.
Claim 16
Dependent Claim
70 words
The method in accordance with claim 2 in which the ultrasonic signals are transmitted to a medium under observation and are returned as echo signals to the conversion medium including the steps of providing a second cathode-ray gun, and sweeping the beam generated thereby over the piezoelectric conversion medium in time-delayed relation to the sweep of the first beam for receiving the echo ultrasonic signals induced by the first beam.
Claim 17
Dependent Claim
36 words
The method of claim 1, wherein the ultrasonic emission of the piezoelectric conversion medium is collimated by proportioning the beam impingement area of the conversion medium to a multiple of wavelengths in the ultrasonic transmission medium.
Claim 18
Dependent Claim
34 words
The method of claim 4 including the step of superimposing a high frequency current on said cathode-ray beam in its transmitting operational mode to enhance transmission to the discrete area impinged by the beam.
References Cited (Backward Citations)
US3213675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |