초록

An electromotive adjustment assembly, includes at least two spindles disposed in parallel spaced-apart relationship, and a motor unit coupled in driving relationship with the spindles for operating the spindles.

대표청구항 ▼

An electromotive adjustment assembly, includes at least two spindles disposed in parallel spaced-apart relationship, and a motor unit coupled in driving relationship with the spindles for operating the spindles. means thereon adapted to be applied to a single hole of a boiler or tank in which minim

An electromotive adjustment assembly, includes at least two spindles disposed in parallel spaced-apart relationship, and a motor unit coupled in driving relationship with the spindles for operating the spindles. means thereon adapted to be applied to a single hole of a boiler or tank in which minimum and maximum liquid levels are to be monitored, said body being suitable for withstanding high pressures and temperatures; and two conductive material rods, partially sunk into said insulating material molded body, protruding above the upper end of the body at different heights from the body in which they are inserted and comprising first and second means for revealing, respectively, minimum and maximum levels of liquid in the boiler or tank in which the level indicator is inserted, each of said rods being provided, on the external surface in contact with said body, with a projection or a recess in order to strengthen coupling between said rods and the material of the body wherein the coupling provides for a seal between the conductive material rods and the body so as to prevent the escape of the contents of the boiler or tank at the seal. 13. A level indicator according to claim 12, wherein the rods are made of stainless steel and are hollow and externally threaded. 14. A level indicator according to claim 12, wherein said projection provided on each rod is a metal ring, integral with said rod, sunk into the insulating material of said body. 15. A level indicator according to claim 14, wherein the conductive material rods which protrude from the insulating material body are coaxial. 16. A level indicator according to claim 15, wherein the rods are made of stainless steel, and the insulating material of the body is a plastic material, polytetrafluoroethylene, or a ceramic material, depending on the operating temperature. 17. A level indicator according to claim 16, wherein the insulating material body has a threaded cylindrical surface provided with a hexagonal nut, so that it can be fixed by screwing to the boiler. 18. A level indicator according to claim 12, wherein said recess provided on each rod is a flattened portion, sunk into the insulating material of said body. 19. A level indicator according to claim 12, wherein the rods are coated by a layer of insulating material discontinued on the two opposite ends of the rods in order to leave uncovered the terminal portions of said rods. 20. A level indicator according to claim 19, wherein said layer of insulating material is a layer of polytetrafluoroethylene. 21. A level indicator according to claim 12, wherein the insulating material of the body is a plastic material, polytetrafluoroethylene, or a ceramic material, depending on the operating temperature. 22. A level indicator according to claim 12, wherein the insulating material body has a threaded cylindrical surface provided with a hexagonal nut, so that it can be fixed by screwing to the boiler or tank. 23. A level indicator according to claim 12, wherein the conductive rods extend below the lower end of the body, at different amounts from the body in which they are inserted, corresponding respectively, to minimum and maximum levels of liquid in the boiler or tank in which the level indicator is inserted.