GB846864A - Improvements in or relating to ultrasonic delay lines - Google Patents
Improvements in or relating to ultrasonic delay linesInfo
- Publication number
- GB846864A GB846864A GB2207255A GB2207255A GB846864A GB 846864 A GB846864 A GB 846864A GB 2207255 A GB2207255 A GB 2207255A GB 2207255 A GB2207255 A GB 2207255A GB 846864 A GB846864 A GB 846864A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- delay lines
- july
- pressing
- thickness
- 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
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
846,864. Ultrasonic delay lines. MULLARD RADIO VALVE CO. Ltd. July 27, 1956 [July 29, 1955], No. 22072/55. Class 40(8). [Also in Group XXII] A piezo-electric transducer of e.g. quartz or barium titanate is attached to the face of a metal or glass delay line by evaporating indium or tin on to the two surfaces to be joined and then pressing them together, the whole process being carried out in a vacuum at a temperature above room temperature. The parts may be heated before they are put into the vacuum chamber or means may be provided for raising them to a desired temperature (e.g. 140‹ C. for indium) inside the chamber. A manipulator is used to press the parts together. The pressing may be completed outside the chamber. The evaporated layers may have a thickness of about one quarterwavelength in order to provide a matching section. In order to determine the thickness, means to measure the resistance of the layers as evaporation proceeds may be provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2207255A GB846864A (en) | 1955-07-29 | 1955-07-29 | Improvements in or relating to ultrasonic delay lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2207255A GB846864A (en) | 1955-07-29 | 1955-07-29 | Improvements in or relating to ultrasonic delay lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB846864A true GB846864A (en) | 1960-08-31 |
Family
ID=10173447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2207255A Expired GB846864A (en) | 1955-07-29 | 1955-07-29 | Improvements in or relating to ultrasonic delay lines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB846864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132601A (en) * | 1982-12-23 | 1984-07-11 | Ferranti Plc | Joining articles of materials of different expansion coefficients |
-
1955
- 1955-07-29 GB GB2207255A patent/GB846864A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132601A (en) * | 1982-12-23 | 1984-07-11 | Ferranti Plc | Joining articles of materials of different expansion coefficients |
| US4930676A (en) * | 1982-12-23 | 1990-06-05 | Ferranti International Plc | Joint between articles of materials of different coefficients of thermal expansion |
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