Fecha de publicación: 10/04/1940 Fuente: WIPO "bee" 519,962. Electric bed warmer. BEE, J. Oct. 25, 1938, No. 30772. [Class 39 (iii)] An electrically heated bed warmer comprises a heating element consisting of resistance wire 3 wound on both sides of an isulationbase 2 enclosed between two cover plates or boards 5, 6 of insulating 'material, the assembly being housed in a metallic casing formed by two sheet-metal trays 8, 9, one fitted over the other and spot welded as at 10. The sheets 5,. 6 are secured to the base by screws 7.