No coin nor oath required. For personal study only.
Chief engineer of Chicago Transformer. "
This basic advance in transformer design will be widely used in television, radio and electronic equipment and in other fields which require electromagnetic components," Mr. Woods pointed out. "The important advantages, immediately, are the large savings in such critical materials as copper and silicon steel, the improvement in efficiency, and the reduction in size and weight. In the relatively near future we anticipate savings in the cost of various types of transformers and other electromagnetic components used in large quantities throughout the electrical industry for household, industrial and military applications.
"This important new development, which will have widespread applications, is the result of a long-range planned research program accelerated by the necessity for conserving scarce materials. Thus a basic forward step in transformer efficiency has been achieved, and the new designs are certain to replace former methods," Mr. Woods declared.
A full year of research and testing by engineers of Philco and Chicago Transformer went into the selection and evaluation of the materials used in these new transformer designs in order to prove the fundamental soundness required for long operating life. These designs are based on the use of high temperature nylon insulation for the magnetic wire instead of the conventional enamel, and an asbestos type of material for coil insulation instead of the conventional organic and paper insulation. These new materials permit operating the coils at temperatures 25 Β° C. higher than has been permitted by the limits for conventional Class "A" materials.
The extensive data secured from these tests have been submitted to the Underwriters Laboratories for their examination and approval. The Laboratories have,agreed to increase the maximum temperature limitations by 25 Β° C. from the 105 Β° C. (hot spot), which is the limit for Class "A" insulation, to 130 Β° C. (hot spot) where the new Philco materials and designs are used in equipment submitted for approval and listing. Since Underwriters Laboratories' approval is required by leading manufacturers of the television, radio and home appliance industries, the sanction of these materials and temperatures is necessary for widespread application in the near future.
Participating in the tests in this transformer development program with Philco and Chicago Transformer were engineers of Essex Wire Company, manufacturers of the magnet wire, and E. I. du Pont de Nemours & Company, manufacturers of nylon for the high temperature wire coating.
π SIMILAR VOLUMES
Precision Polymer Engineering (PPE) has installed a new molding machine, producing seals up to 2 m in diameter for the marine engine, oil & gas, nuclear and power generation industries. Weighing 122 tonnes, the 500 tonne variable down-stroking press took 10 months to build and customize to the spec
## Eriks acquires Cal Seal E riks has acquired California Seal and Fastener Inc (Cal Seal) -a major US supplier of speciality sealing, vacuum components and accompanying logistics services.