http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1038651-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5635744f3e22ca8d710dd1f2707bee23 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S1-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03H11-245 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01L27-088 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01L29-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03G1-0029 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L13-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L12-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03H9-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03K17-691 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03F3-193 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L12-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01L29-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03K17-691 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01L27-088 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03H11-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03H9-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L13-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03F3-193 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03G1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S1-64 |
| filingDate | 1964-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1038651-A |
| titleOfInvention | Solid delay line and method |
| abstract | 1,038,651. Electro-mechanical delay lines. CORNING GLASS WORKS. March 10, 1964 [March 18, 1963], No. 10084/64. Heading H3U. In an ultrasonic electro-mechanical delay line of the kind comprising a flat plate of polygonal outline, and in which two of the facets on the periphery of the plate serve as input and output facets supporting respectively input and output transducers adapted to launch and receive transverse mechanical waves vibrating parallel to the major surfaces of the plate, the plate is so shaped that waves launched from the input transducer are reflected from one or more reflection facets before being received at the output transducer and the angle of incidence of the waves on the reflection facets are in all instances greater than the critical angle for the medium and in at least one of the reflections greater by less than two degrees, and acoustic absorbing material is attached to the reflection facets between the points at which desired reflections occur. Fig. 1 illustrates a solid delay line comprising input and output facets supporting respectively input and output transducers 24, 26 constituted by piezo-electric material such as quartz, barium titanate, a lead-zirconate lead-titanate mixture or potassium sodium niobate, oscillating in the thickness shear mode. The delay medium may be fused silica or an alkali-lead-silicate glass, as described in Specification 990,265. The ray paths in the medium are illustrated in Fig. 2 and in between the points of reflection at the periphery of the medium there are arranged acoustic-absorbing elements 28 composed of suitable material such as lead, tin or an indium-tin alloy comprising 60% indium and 40% tin. In a particular example, the critical angle for the medium was 39 degrees. The angle incidence for the first reflection was consequently chosen to be 39 degrees 30 minutes so that substantially all spurious signals to one side of the main beam impinged on the first reflecting surface at an angle less than the critical angle and were consequently dissipated. The situation of the sound absorbers was such as to limit the signals to the main beam only. By this means considerable improvement of signal-to-noise ratio was achieved. In the arrangement illustrated in Fig. 5 the outline of the plate is so chosen that successive reflections take place at an angle of incidence close to the critical angle whereby spurious signals to both sides of the main beam are dissipated. |
| priorityDate | 1963-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.