US3798577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic delay line
Assignee: Panasonic Holdings Corp
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Filing: 1972-05-15
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Granted: 1974-03-19
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Expires: 1992-05-15
Abstract
Abstract An ultrasonic delay line having an ultrasonic beam path with a plurality, preferably seven, reflection points, and comprising a body of lead silicate glass and a transmitting transducer and a receiving transducer. The body has top and bottom major surfaces substantially parallel to each other, first and second side surfaces which are substantially rectangular in shape and substantially at right angles to the top and bottom major surfaces, a third side surface substantially at a right angle to both the top major surface and the first side surface, a fourth side surface which is substantially at an angle of 135* to the first side surface and supporting either the transmitting transducer or the receiving transducer thereon, and a fifth side surface substantially at an angle of 135* to the second side surface and supporting the other of the transmitting and the receiving transducers thereon. In the preferred form, the medium has a shape such that the length of the first and second side surfaces is about three times the length of the third side surface. The medium may have, at a portion adjacent the ultrasonic beam path, at least one hole and at least one diffusion layer zone which has a lower mechanical Q than that of the ultrasonic beam path, and said hole may have an inner wall provided with an ultrasonic adsorber.
Inventors
- 👤 Y Kasahara
- 👤 T Iguchi
- 👤 M Mikoda
- 👤 I Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:48
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
An ultrasonic delay line having an ultrasonic beam path therein with reflection points which comprises a body of lead silicate glass, a transmitting transducer and a receiving transducer, said body having top and bottom major surfaces parallel to each other, first and second side surfaces each substantially rectangular in shape and being at substantially right angles to said top and bottom major surfaces, a third side surface substantially at a right angle to both said top major and bottom major surfaces and said first side surface, a fourth side surface at an angle of substantially 135* to said first side surface and haVing one of said transmitting and receiving transducers mounted thereon, and a fifth side surface at an angle of substantially 135* to said second side surface and having the other of said transmitting and receiving transducers mounted thereon, said body having, at a portion adjacent to said ultrasonic beam path, at least one diffusion layer zone which has a lower mechanical quality factor Q than the quality factor Q of the material of said body.
Claim 2
Dependent Claim
177 words
An ultrasonic delay line having an ultrasonic beam path therein with reflection points which comprises a body of lead silicate glass, a transmitting transducer and a receiving transducer, said body having top and bottom major surfaces parallel to each other, first and second side surfaces each substantially rectangular in shape and being at substantially right angles to said top and bottom major surfaces, a third side surface substantially at a right angle to both said top major and bottom major surfaces and said first side surface, a fourth side surface at an angle of substantially 135* to said first side surface and haVing one of said transmitting and receiving transducers mounted thereon, and a fifth side surface at an angle of substantially 135* to said second side surface and having the other of said transmitting and receiving transducers mounted thereon, said body having, at a portion adjacent to said ultrasonic beam path, at least one diffusion layer zone which has a lower mechanical quality factor Q than the quality factor Q of the material of said body.
Claim 3
Dependent Claim
30 words
An ultrasonic delay line as claimed in claim 1 wherein said body has at least one diffusion layer zone on said first and second side surfaces between adjacent reflection points.
Claim 4
Dependent Claim
41 words
An ultrasonic delay line as claimed in claim 1 wherein said body has, at a portion adjacent to said ultrasonic beam path, at least one hole therethrough, the surface of said body defining said hole having thereon said diffusion layer zone.
Claim 5
Dependent Claim
31 words
An ultrasonic delay line as claimed in claim 3 wherein said hole has a shape taken from the geometric figures consisting of a circle, a rectangle, a cross and an asterisk.
Claim 6
Dependent Claim
167 words
An ultrasonic delay line having an ultrasonic beam path therein with seven reflection points which comprises a body of lead silicate glass, a transmitting transducer and a receiving transducer, said body having top and bottom major surfaces substantially parallel to each other, first and second side surfaces each substantially rectangular in shape and being at substantially right angles to both said top and bottom major surfaces, a third side surface at substantially a right angle to both said top major surface and said first side surface, a fourth side surface at an angle of substantially 135* to said first side surface and having one of said transmitting and receiving transducers mounted thereon, and a fifth side surface at an angle of substantially 135* to said second side surface and having the other of said transmitting and receiving transducers mounted thereon, said body having a shape such that the length of said first and second side surfaces is about three times the length of said third side surface.
Claim 7
Dependent Claim
167 words
An ultrasonic delay line having an ultrasonic beam path therein with seven reflection points which comprises a body of lead silicate glass, a transmitting transducer and a receiving transducer, said body having top and bottom major surfaces substantially parallel to each other, first and second side surfaces each substantially rectangular in shape and being at substantially right angles to both said top and bottom major surfaces, a third side surface at substantially a right angle to both said top major surface and said first side surface, a fourth side surface at an angle of substantially 135* to said first side surface and having one of said transmitting and receiving transducers mounted thereon, and a fifth side surface at an angle of substantially 135* to said second side surface and having the other of said transmitting and receiving transducers mounted thereon, said body having a shape such that the length of said first and second side surfaces is about three times the length of said third side surface.
Claim 8
Dependent Claim
67 words
An ultrasonic delay line as claimed in claim 5, wherein said body has, at a portion adjacent to said ultrasonic beam path, at least one hole therethrough, said hole having on the surface thereof a diffusion layer zone which has a lower mechanical quality factor Q than the quality factor Q of the material of the body around said hole through which said ultrasonic beam path extends.
Claim 9
Dependent Claim
61 words
An ultrasonic delay line as claimed in claim 5, wherein said body has, at said first and second side surfaces, at least one diffusion layer zone between adjacent reflection points of said ultrasonic beam path, said diffusion layer zone having a lower mechanical quality factor Q than the quality factor Q of the material of said body at said reflection points.
Claim 10
Dependent Claim
38 words
An ultrasonic delay line as claimed in claim 6 wherein the surface of said body defining said hole has thereon an ultrasonic absorber of a material selected from a group consisting of rubber, wax, cement, resin and glass.
Claim 11
Dependent Claim
31 words
An ultrasonic delay line as claimed in claim 6 wherein said hole has a shape taken from the geometric figures consisting of a circle, a rectangle, a cross and an asterisk.
Claim 12
Dependent Claim
35 words
An ultrasonic delay line as claimed in claim 5 wherein said top and bottom major surfaces have a roughness less than one twentieth the wave length of the ultrasonic wave projected along said beam path.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |