| 摘要 |
A device for de-icing windshield wipers and the like, and takes the form of an electric heating element (10) shaped as an elongate strip with substantially the same outside dimensions, and also to advantage with the same resiliency characteristics, as one of the spring strips normally inserted in longitudinal grooves on either side of a wiper blade to give it the necessary lateral stiffness and vertical springiness. This strip-like electrical heating element is intended for inserting in one of said grooves in the blade instead of the normal spring strip. The heating element is built up from an outer metal casing (13) having said strip shape and resiliency characteristics, and being provided with an internal axial duct in which an insulated (12) electric resistance wire (11) is disposed. At its one end, this resistance wire is connected to an electric supply lead at one end of the casing, while at its other end the wire is electrically connected to the casing in the vicinity of the other end of the latter, so that the casing can function as ground or return lead for the heating element. The outer metal casing can to advantage consist of a metal tube flattened to the rectangular shape of a normal strip. |
