GB571904A - Improvements in or relating to piezoelectric transducers - Google Patents
Improvements in or relating to piezoelectric transducersInfo
- Publication number
- GB571904A GB571904A GB526/44A GB52644A GB571904A GB 571904 A GB571904 A GB 571904A GB 526/44 A GB526/44 A GB 526/44A GB 52644 A GB52644 A GB 52644A GB 571904 A GB571904 A GB 571904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foil
- crystal
- plates
- electric
- piezo
- 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
- 239000011888 foil Substances 0.000 abstract 10
- 239000013078 crystal Substances 0.000 abstract 6
- 239000000853 adhesive Substances 0.000 abstract 3
- 230000001070 adhesive effect Effects 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 2
- 230000004927 fusion Effects 0.000 abstract 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical class [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 239000012790 adhesive layer Substances 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 235000013871 bee wax Nutrition 0.000 abstract 1
- 239000012166 beeswax Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000002178 crystalline material Substances 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 abstract 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 229920001187 thermosetting polymer Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 1
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
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
571,904. Piezo-electric crystals. BRUSH DEVELOPMENT CO. Jan. 11, 1944, No. 526. Convention date, Jan. 11, 1943. [Class 40 (v)] A lead extension foil is joined to a surface of a piezo-electric crystal by means of a substance which softens under the influence of pressure and heat. The heat may be generated by the passage of electric current through the extension foil, and the method may be used for joining a plurality of crystal plates by means of intervening extension foils. In Fig. 1 a lead extension foil 5 having on both sides a layer 7 of an adhesive material which softens under the influence of heat and pressure is placed between piezo-electric plates 1, 3 having on their opposed surfaces electrode coatings of sprayed metal or colloidal graphite. Pressure is applied to the elements, and the foil 5 is heated by a measured current which is supplied' for a predetermined interval by source 9 under the control of a main switch 11, resistance 13 and time-switch 15. On cooling, the adhesive rigidly connects the crystal plates 1, 3 together and to the foil 5. To establish a conductive connection between the foil 5 and the crystal electrodes, the adhesive layer may contain conducting particles. Alternatively, the foil 5 may be formed with oppositely-directed struck up tags 11, Fig. 4. Where the crystalline material has a lower dielectric constant than Rochelle Salt, for example the primary alkali arsenates and phosphates, these conductive connections may be omitted. A suitable adhesive may be formed of one part beeswax, one part battery-sealing compound and two parts resin. Alternatively, a synthetic thermoplastic or thermosetting material may be used, so long as the temperature of fusion is below that which would damage the crystal material. Fig. 6 shows a method of making a number of such compound units, the elements of which are placed in pockets 23 on a moving belt 19 with the lead foils 5 lying on the surface of the belt, and a weight W on each stack of plates. Fusion current from a source 27 is supplied to the foils 5 as they pass under a pair of contact rollers 25. The cooled completed element falls into a bin 29. Alternatively the heating current may be supplied inductively by a coil (not shown) placed beneath the belt 19. Specification 454,595 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US571904XA | 1943-01-11 | 1943-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB571904A true GB571904A (en) | 1945-09-13 |
Family
ID=22009055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB526/44A Expired GB571904A (en) | 1943-01-11 | 1944-01-11 | Improvements in or relating to piezoelectric transducers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB571904A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311137A (en) * | 1996-03-14 | 1997-09-17 | Secr Defence | Piezoelectric stress gauge |
-
1944
- 1944-01-11 GB GB526/44A patent/GB571904A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311137A (en) * | 1996-03-14 | 1997-09-17 | Secr Defence | Piezoelectric stress gauge |
| GB2311137B (en) * | 1996-03-14 | 2000-02-23 | Secr Defence | Piezoelectric stress gauge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2423922A (en) | Piezoelectric transducer | |
| US2388242A (en) | Piezoelectric transducer | |
| US2866013A (en) | Magnetic record method and apparatus | |
| US2487985A (en) | Thermoplastic conductive joint for flat cells | |
| US2479926A (en) | Electrotransducer and method of making same | |
| US2864013A (en) | Sensitive strain responsive transducer and method of construction | |
| GB1108846A (en) | Piezo-electric devices | |
| US3930982A (en) | Ferroelectric apparatus for dielectrophoresis particle extraction | |
| US2497665A (en) | Piezoelectric device | |
| US2636134A (en) | Piezoelectric pressure gauge element | |
| US3448503A (en) | Method for joining piezoelectric elements | |
| GB571904A (en) | Improvements in or relating to piezoelectric transducers | |
| US2393429A (en) | Piezoelectric device | |
| GB1154032A (en) | Improvements relating to the Making of Joints between Electrically Conductive Components | |
| US2479987A (en) | Multiplate electrotransducer | |
| US2824980A (en) | Piezoelectric transducers | |
| US2521661A (en) | Electrotransducer element | |
| US2768421A (en) | Method of making circuit connections to a transducer unit | |
| JPS5773512A (en) | Piezoelectric oscillator | |
| US3284606A (en) | Heat sink material and applications thereof | |
| JPH02103875A (en) | Anisotropic conductor | |
| US2518793A (en) | Crystal mounting | |
| JPS56125200A (en) | Electrode plate electret for electrostatic type electro-acoustic converter | |
| SU17500A1 (en) | Device for the technical use of the phenomenon of polarization of dielectrics by passing an electric current through them | |
| GB566927A (en) | Improved method of and means for heating articles in a high frequency electric field |