Motion sensing device

Claim 3

The device of claim 1 wherein the container provides one electrode, the container is cylindrical, the container is sealed, both electrodes are made of the same material, one electrode is centrally located within the container and partially immersed in said conductive liquid and the resistance between said electrodes is from about 0.1 ohm to about 10 ⁷ ohms.

Claim 6

The device of claim 3 wherein the conductive liquid has a specific resistance of from about 10 ⁴ to 10 ⁹ ohms-cm and a viscosity not greater than about 20 centipoise, the wire has a diameter not greater than about one-eighth of an inch and the resistance between the electrodes is from about 5 x 10 ⁴ ohms to about 5 x 10 ⁵ ohms.

Claim 7

The device of claim 3 wherein the conductive liquid has a specific resistance of from about 10 ⁶ to 10 ⁸ ohm-cm and a viscosity not greater than about 2 centipoise, the wire has a diameter not greater than about on-eighth of an inch and the resistance between electrodes is from about 5 x 10 ⁴ to 5 x 10 ⁵ ohms.

Claim 10

The device of claim 6 wherein no dimension of the container is greater than about one inch, and the conductive liquid is commercial acetone.

Claim 11

The device of claim 6 wherein no dimension of the container is greater than about one inch, and the conductive liquid is 95% ethanol.

Claim 12

A signal system comprised of a device adapted to sensing motion when activated by passage of an electric current between two electrodes comprised of a container partially filled with a mobile, conductive liquid and first and second electrodes in contact with said conductive liquid with at least one of said electrodes only partially immersed in said conductive liquid the immersed portion of said second electrode receiving the electric current from above the surface of the liquid through a resistor, and with the resistance between said electrodes being at the range from about 0.1 ohm to about 10 ⁷ ohms, means for passing a flow of electric current through said electrodes, means for sensing the change in electric current when the resistance between the electrodes is changed by motion of the conductive liquid, signal means, and means for activating said signal means when the change in resistance is sensed by the sensing means.

Claim 13

A signal system comprised of a device adapted to sensing motion when activated by passage of an electric current between two electrodes comprised of a container partially filled with a mobile, conductive liquid and first and second electrodes in contact with said conductive liquid with at least one of said electrodes only partially immersed in said conductive liquid the immersed portion of said second electrode receiving the electric current from above the surface of the liquid through a resistor, and with the resistance between said electrodes being at the range from about 0.1 ohm to about 10 ⁷ ohms, means for passing a flow of electric current through said electrodes, means for sensing the change in electric current when the resistance between the electrodes is changed by motion of the conductive liquid, signal means, and means for activating said signal means when the change in resistance is sensed by the sensing means.

Claim 14

The signal system of claim 9 wherein the motion sensing device is comprised of a cylindrical, sealed container partially filled with a conductive liquid with a specific resistance in the range from about 10 ⁶ to 10 ⁸ ohm-cm and a viscosity not greater than about 2 centipoise said container providing one of two electrodes, the second electrodes being a centrally positioned cylindrical wire with diameter not greater than about one-eighth of an inch, the second electrode being only partially immersed in said conductive liquid, the electrodes being made from a material selected from the group consisting of aluminum, copper, nickel and zinc and alloys of aluminum, of copper, of nickel and of zinc, both electrodes being made from the same material, and, where the resistance between the electrodes is about 100,000 ohms, means for passing a flow of electric current through said electrodes, means for sensing the change in electric current when the resistance between the electrodes is changed by motion of the conductive liquid, signal means, and means for activating said signal means when the change in resistance is sensed by the sensing means.