Cell for the measurement of the dielectric constant of viscous or pasty substances
First Claim
1. In a cell for the measurement of the dielectric properties of a viscous or pasty substance comprising:
- first and second separable elements, said first separable element having an outer cylindrical electrically conductive surface and forming an internal electrode and said second separable element having an inner cylindrical electrically conductive surface and forming an external electrode;
a first terminal connected to said first separable element;
a second terminal connected to said second separable element; and
centering means to keep said first and second separable elements in cooperation with each other in an operating position wherein said inner and outer cylindrical electrically conductive surfaces are substantially coaxial and are at least partly disposed opposite each other;
the improvement comprising;
(a) inner cylindrical surface means extending said inner cylindrical surface of the external electrode at each one of its ends, said inner cylindrical surface means comprising means defining an electrically insulating surface adjacent to said inner cylindrical surface of the external electrode and also an electrically conductive cylindrical surface therebeyond, the said electrically conducting inner surfaces of the inner surface means being insulated in relation to the external electrode;
(b) a third terminal electrically connected to both of said electrically conductive inner surfaces of the inner surface means;
(c) a frustoconical male element of said centering means, formed on said first element and having the same axis of revolution as said internal electrode thereof; and
(d) a frustoconical female element of said centering means, formed in said second element and having the same axis of revolution as the external electrode thereof, said male and female elements of said centering means having respective frustoconoical surfaces which are both electrically conductive and said third terminal comprising an electrical conductor connected to the conductive surfaces of said first element and a separate electrical conductor connected to the conductive surface of said second element whereby said conductive surfaces of said first and second elements may be connected to a potential ground, said first element having a base with said male element being formed on said base and insulating means being disposed between said internal electrode and said male element.
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Accused Products
Abstract
A cell for the measurement of the dielectric properties of liquids, pastes or flowable solids (i.e. solids whose melting temperatures are low enough to allow them to be poured into the cell) comprises a bullet-shaped internal electrode having its cylindrical portion in register with a surrounding coaxial cylindrical external electrode which is extended at each end by electrically conductive annular guard members insulated from the external electrode by means of spacers of electrically insulating material.
The internal electrode is mounted coaxially within the external electrode by means of a tapered male-female centering connector whose male and female elements are both connected to earth.
13 Citations
11 Claims
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1. In a cell for the measurement of the dielectric properties of a viscous or pasty substance comprising:
- first and second separable elements, said first separable element having an outer cylindrical electrically conductive surface and forming an internal electrode and said second separable element having an inner cylindrical electrically conductive surface and forming an external electrode;
a first terminal connected to said first separable element;
a second terminal connected to said second separable element; and
centering means to keep said first and second separable elements in cooperation with each other in an operating position wherein said inner and outer cylindrical electrically conductive surfaces are substantially coaxial and are at least partly disposed opposite each other;
the improvement comprising;
(a) inner cylindrical surface means extending said inner cylindrical surface of the external electrode at each one of its ends, said inner cylindrical surface means comprising means defining an electrically insulating surface adjacent to said inner cylindrical surface of the external electrode and also an electrically conductive cylindrical surface therebeyond, the said electrically conducting inner surfaces of the inner surface means being insulated in relation to the external electrode;
(b) a third terminal electrically connected to both of said electrically conductive inner surfaces of the inner surface means;
(c) a frustoconical male element of said centering means, formed on said first element and having the same axis of revolution as said internal electrode thereof; and
(d) a frustoconical female element of said centering means, formed in said second element and having the same axis of revolution as the external electrode thereof, said male and female elements of said centering means having respective frustoconoical surfaces which are both electrically conductive and said third terminal comprising an electrical conductor connected to the conductive surfaces of said first element and a separate electrical conductor connected to the conductive surface of said second element whereby said conductive surfaces of said first and second elements may be connected to a potential ground, said first element having a base with said male element being formed on said base and insulating means being disposed between said internal electrode and said male element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- first and second separable elements, said first separable element having an outer cylindrical electrically conductive surface and forming an internal electrode and said second separable element having an inner cylindrical electrically conductive surface and forming an external electrode;
Specification