By Marc J. de Vries, Marc J. Vries
Considering that global battle I, the Natuurkundig Laboratorium has been a very important middle of commercial study for Philips, one of many world’s greatest electronics businesses. during this examine, Marc J. de Vries demonstrates how the background of the laboratory may also help us comprehend very important alterations within the creation and makes use of of expertise within the 20th century. Breaking their research into 3 classes, every one characterised through various learn ambitions and methods, the authors increase this common historical past with special case stories. the end result could be of worth to somebody learning the background and philosophy of know-how.
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Additional resources for 80 Years of Research at the Philips Natuurkundig Laboratorium (1914-1994): The Role of the Nat. Lab. at Philips
Unfortunately, hafnium proved to be unsuitable as an emissive material for cathodes. In general, having a better understanding of the processes did not produce many practical results. The most important invention in the field of thermionic emission was that of the L-cathode, named after marc j. de vries 47 B P A F A F B P a a b Figure 6. The L-cathode (from Philips Technical Review Vol. 11, p. 342). Two basic forms are shown in cross-section: (a) with a cylindrical emitting surface and (b) with a flat emitting surface.
A lecture room for several hundred people was included in the new facilities. In 1935 the workshops moved into the pilot factory building, which again made extra space available for working in. ) had to be merged into one central workshop. J. (Frits, the only son of Anton) Philips had made responsible for this operation, later intimated marc j. de vries 53 outbreak war salary decrease Scientist, including, physical eng. from Delft Engineers, except physical eng. Technical assistents Total monthy paid personnel 250 Number 150 total mobilisation extension lab.
Work on ferrites (not a metallic, but a ceramic material) received new impetus in 1940 when a piece of Japanese material proved that it was possible to make ferrite cores with low losses. This prompted Snoek to continue his investigations after a period of despondence. From then on, the work flourished again, leading to the Ferroxcube material that after 1950 was to be applied widely in coil cores for various products. Unexpected Side Paths: Pharmaceuticals and Hot Air Engines So far, each step in the diversification of the research programme seemed quite logical in relation to the company’s product range diversification.