http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-584851-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01B3-445 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01B3-44 |
| filingDate | 1943-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1947-01-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-584851-A |
| titleOfInvention | Electrical apparatus |
| abstract | Polytetrafluoroethylene is used as insulation in electric apparatus, e.g. for copper conductors, transformers, motors, dynamos, cables, condensers, sparking-plugs, storage battery separators, radio valve sockets, boxes, spacers and supports, formers for coils and resistances, spreaders and insulation for lead-in wires, couplings for high voltage transmission shafts, transmitting crystal holders, spacers for coaxial cables, washers, bearings, bushes and gaskets. Wires may be coated by pressing them between strips of the polymer at a temperature of 400 DEG C. and a pressure of 200 to 500 lbs. per square inch followed by quenching in water, trimming the coating and, if desired, passing the coated wire through a circular die; by extrusion; or by wrapping with fibres or films of the polymer. Copper conductors covered with polytetrafluoroethylene, the electrical conductivity of which has become impaired by cold-working, e.g. during winding, may be annealed to increase their conductivity by heating to a temperature between 200 DEG and 400 DEG C. Fillers, e.g. carbon, titanium and manganese dioxides, lead oxides, silica, barium sulphate, magnesium carbonate, zinc sulphide, calcium chromate, asbestos, powdered mica, fuller's earth, glass fibres and conducting material such as grains or flakes of aluminium, copper, silver, graphite and carbon may be incorporated in the polymer. An example describes an electric motor in which the armature slots and commutator segments and V-ring are insulated with polytetrafluoroethylene film and the armature wound with copper wire coated with the polymer. The whole assembly is heated to a temperature of 250-275 DEG C. to anneal the armature winding. Specifications 572,265 and 574,688 are referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2668936-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104272407-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104272407-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0442363-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013164146-A3 |
| priorityDate | 1942-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.