Motion sensing device
August 31, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTemperature compensated toroidal accelerometer Position-sensitive alarm system Deflection measuring system Tilt-sensitive ignition switch Method of applying an electrode to the skin of a patient Tilt meter Apparatus for detecting unauthorized egress by patient from position of confinement Electronic level Portable alarm Planter monitor system Patent #: 4710757 InventorAssigneeApplicationNo. 07/091447 filed on 08/31/1987US Classes:340/664, Current33/366.21, Having resistive or contact circuit control element340/669, Acceleration340/689, Tilt73/500, Liquid surface is or moves reading means73/514.09, Fluid or fluent inertial mass73/654With electrically controlled indicatorExaminersPrimary: Swann, III, Glen R.Assistant: Mullen, Thomas J. Jr. Attorney, Agent or FirmInternational ClassesG08B 21/00 (20060101)G08B 21/04 (20060101) G08B 13/02 (20060101) G08B 13/14 (20060101) AbstractThis invention relates to a device adapted to sensing motion when powered by passage of an electric current between two electrodes that is comprised of a container partially filled with an electrically conductive liquid along with two electrodes in contact with the conductive liquid at least one of which is only partially in contact with said conductive liquid. Motion of the liquid causes a change in resistance between the electrodes which may be detected as a change in current flow. These changes in current flow can be amplified and used to activate an alarm or other signal device.Other References
| |
