ES373385A1 - Improvements in ultrasonic delay lines and methods of and apparatus for manufacturing the same - Google Patents
Improvements in ultrasonic delay lines and methods of and apparatus for manufacturing the sameInfo
- Publication number
- ES373385A1 ES373385A1 ES373385A ES373385A ES373385A1 ES 373385 A1 ES373385 A1 ES 373385A1 ES 373385 A ES373385 A ES 373385A ES 373385 A ES373385 A ES 373385A ES 373385 A1 ES373385 A1 ES 373385A1
- Authority
- ES
- Spain
- Prior art keywords
- strip
- strips
- stack
- delay lines
- soldered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/30—Time-delay networks
- H03H9/36—Time-delay networks with non-adjustable delay time
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
A method of manufacturing a plurality of strip delay lines comprises the steps of: forming a stack of strips of a material through which ultrasonic waves may be propagated grinding surfaces of the stack to form input and surfaces on the strips securing plated pieces of piezoelectric material to the ground surfaces of the stack and separating the delay lines from each other by forming slots in the said pieces at positions situated between the strips. One embodiment of an individual delay line, Figs. 1a 1b, comprises a steel-nickel alloy strip 1 having a thickness less than one half of the wavelength of the signal to be propagated, the ends of the strip having piezo-electric bars 2 soldered thereto, the length h of the bars being less than the width I of the strip. The bars 2, polarized to operate in the shear mode, are plated with an electrode along the long edge in contact with the end of the strip and also along the opposite outward facing edge, leads 12, 13 making connection with the electrodes. The long edges of the strip 1 have absorptive tapes 3 applied thereto. In another embodiment, Fig. 2, the strip 8 has a dihedral edge supporting transducers 9 and the opposite edge 11 acts as a reflector, the other edges of the strip having absorptive tapes 10. In the manufacturing method, Fig. 4, a plurality of steel strips 21 separated by spacers 22 are temporarily clamped together to form a stack and those faces of the stack to which the piezo-electric plates 26 are to be soldered, are trimmed by grinding. Fig. 4 shows a single plate 26 having metallized opposite faces 25, 27, the face 27 being secured by a solder joint 28 to a ground face of the stack. The face 25 has an electrical connection in the form of a foil 24 and another foil 23 is soldered to the strips 21. The individual delay lines are produced by a frame saw having cutter wires 29 which saw into the spaces formed by the spacers 22. In a modification (Fig. 5, not shown), the cutter wires 29 are replaced by diamond cutter disc. The steel strips are dimensioned to have a delay time slightly less than the desired value, the final value being achieved by mechanically deforming the strips over a localized area by a hammering operation (Fig. 6, not shown), by a rolling operation (Fig. 7, not shown) or by a stretching operation (Fig. 8, not shown). The delay line strip 59 may be subsequently bent into the shapes shown in Figs. 9, 10.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR174566 | 1968-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES373385A1 true ES373385A1 (en) | 1972-01-16 |
Family
ID=8657156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES373385A Expired ES373385A1 (en) | 1968-11-20 | 1969-11-10 | Improvements in ultrasonic delay lines and methods of and apparatus for manufacturing the same |
Country Status (10)
Country | Link |
---|---|
AT (1) | AT310810B (en) |
BE (1) | BE741016A (en) |
CH (1) | CH515656A (en) |
CS (1) | CS163746B2 (en) |
DE (1) | DE1955297C3 (en) |
ES (1) | ES373385A1 (en) |
FR (1) | FR1592434A (en) |
GB (1) | GB1219530A (en) |
NL (1) | NL6917342A (en) |
SE (1) | SE355274B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4874949A (en) * | 1971-12-31 | 1973-10-09 | ||
JPS4932538U (en) * | 1972-06-22 | 1974-03-22 | ||
JPS4940340U (en) * | 1972-07-17 | 1974-04-09 | ||
SU590660A1 (en) * | 1975-07-28 | 1978-01-30 | Всесоюзный Научно-Исследовательский Институт По Разработке Неразрушающих Методов И Средств Контроля Качества Материалов | Electromagnetic-acoustic transducer |
-
1968
- 1968-11-20 FR FR1592434D patent/FR1592434A/fr not_active Expired
-
1969
- 1969-10-30 BE BE741016D patent/BE741016A/xx unknown
- 1969-11-04 DE DE19691955297 patent/DE1955297C3/en not_active Expired
- 1969-11-10 CH CH1666469A patent/CH515656A/en not_active IP Right Cessation
- 1969-11-10 ES ES373385A patent/ES373385A1/en not_active Expired
- 1969-11-12 AT AT1062569A patent/AT310810B/en not_active IP Right Cessation
- 1969-11-17 GB GB5623269A patent/GB1219530A/en not_active Expired
- 1969-11-18 NL NL6917342A patent/NL6917342A/xx not_active Application Discontinuation
- 1969-11-19 SE SE1590869A patent/SE355274B/xx unknown
- 1969-11-20 CS CS766069A patent/CS163746B2/cs unknown
Also Published As
Publication number | Publication date |
---|---|
FR1592434A (en) | 1970-05-11 |
GB1219530A (en) | 1971-01-20 |
NL6917342A (en) | 1970-05-22 |
DE1955297B2 (en) | 1978-02-23 |
DE1955297C3 (en) | 1978-10-12 |
DE1955297A1 (en) | 1970-06-18 |
AT310810B (en) | 1973-10-25 |
SE355274B (en) | 1973-04-09 |
CH515656A (en) | 1971-11-15 |
CS163746B2 (en) | 1975-11-07 |
BE741016A (en) | 1970-04-01 |
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