Toroidal electrolytic sensor and method of manufacture

Claim 1

An electrolytic level sensor subjected to acceleration forces comprising a toroidal shaped housing formed of a first and second moulded and sealed members at least one of said members including a channel for providing with said other member a toroidal chamber within said sealed toroidal housing having a characteristic dimension along a prescribed section of its arcuate length, a metallic plug insert centrally positioned with respect to said prescribed section in said channel of said first member, first thin electrode means deposited along said prescribed section in said channel of said first member and in electrical contact with said plug, wire means spot welded to said metallic plug, first, second and third tubular conducting terminals inserted in said second member whereby said wire means is in electrical contact with and disposed within said first terminal, second and third thin electrode means deposited along first and second arcuate lengths, respectively, within said prescribed sections of said chamber on said second member whereby said second and third electrode means are in electrical contact with said second and third hollow conducting terminals, and an electrolyte within said inner chamber covering a portion of said first, second and third electrode means, respectively, whereby the impedances of said second and third electrodes will vary with respect to said first electrode as measured between said first, second and third terminals in accordance with the position of the surface of said electrolyte relative to said second and third electrodes, and said surface has a stability which is a function of at least said characteristic dimension, said acceleration forces and the density of said electrolyte.