Mercury switch arrangement for digital watch
Patent 4129982 Issued on December 19, 1978. Estimated Expiration Date: 
March 8, 1997. 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.
March 8, 1997. 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 References 3232119 3871170 3921385 Hourglass watch Solid state watch with inertial switch Patent #: 4051662 InventorApplicationNo. 05/775448 filed on 03/08/1977US Classes:368/225, By motion or position200/61.47, Conducting fluid type368/241, With solid body light emitter (e.g., LED)368/242, With liquid crystal display (i.e., LCD)968/448Position, e.g., inclination dependent switches, etc. [G04C 3/00K2]ExaminersPrimary: Jackmon, Edith S.Attorney, Agent or FirmInternational ClassG04C 3/00 (20060101)AbstractAn automatically operating switch for activating the display of an LED digital wrist watch. The orientation of the wearer's wrist determines each of the various functions of the watch that are visually displayed. A curved tube of a non-wetting type is provided for housing a mercury bead. The position of the tube can be manually adjusted within the watch case in order to alter the response characteristics of the switch. | |
