The Tudor electrode stood out because of its unequalled reliability. We know from a reliable source that a Tudor accumulator was put into service in October 1882 and that it ran without any interruption until December 1887. Accumulator plates having been in regular service during 16 years are exhibited in the Tudor Museum in Rosport. On 5 May 1891, Henri Tudor married Marie-Madeleine Pescatore of Bofferdange. They had three children and the young family moved in September 1892 into their newly built monumental Manor House in Rosport. In 1914, Henri Tudor began to suffer from a serious lead poisoning which caused his death in 1928. On 17 July 1886, Henri Tudor filed, in Luxembourg, patent No 711 "Further improvements to the electrodes of electric accumulators". This patent was also filed in Belgium and France. The improvements consist of the following: The plates (electrodes) are thick enough to be rigid and to provide a high level of conductivity; they are grooved so as to offer a large surface, the grooves being slightly tapered. The plates undergo a "formation" in accordance with the method developed by Planté but of much shorter duration, the grooves are then filled with a lead oxide paste according to the Faure process (smearing). The plates are then treated with a weak intensity current until the paste is transformed into lead peroxide on the positive plates and into reduced lead on the negative plates. The Planté layer provides a good adhesion of the active paste and the tapered shape of the grooves allows the paste particles to slip during the successive charging and discharging cycles of the battery without causing distortions of the plate. Disintegrated oxide particles fall into cavities deliberately left below the plates. The Planté layer is strengthened during the charging and discharging cycles: the final "formation" of the Tudor plate happens during the actual use of the accumulator. The Tudor electrode combines the advantages of the Planté and Faure methods while avoiding their respective disadvantages. In order to avoid the smearing operation, which was laborious and hazardous, Henri Tudor was looking for ways to create a Planté layer by means of an accelerated electrochemical process. On 18 May 1896, he filed, in the United Kingdom, his Patent No 10718 on the electrode coated with a thin layer of oxide. This layer was obtained by reverse electrolysis in very dilute acid in order to promote the formation of "lead oxide containing sulphate", which actually consisted of basic lead sulphates described by the general formula x PbO • y PbSO4 • z H2O.