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Portable precision clock with additonal functions

  • US 5,790,477 A
  • Filed: 06/09/1997
  • Issued: 08/04/1998
  • Est. Priority Date: 06/10/1996
  • Status: Expired due to Fees
First Claim
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1. A portable precision watch with time-keeping functions, additional functions and energy storage means, wherein the watch also containsa GPS receiver with an antenna and evaluation electronics,a compass for determining the magnetic north-south direction,a memory for storing destination coordinates,an input element for inputting selectable destination coordinates,and a display element for displaying the direction from a location to a destination, whereinwith the evaluation electronics, the coordinates of the location are determined andfrom the coordinates of the location and the coordinates of the destination, the direction to the destination is calculated,wherein by way of the compass the alignment of the watch to the geographical north-south direction is determined and taking account of this alignment of the watch, the direction to the destination is made viewable as a vector display in the display element,wherein all elements are grouped together as a compact functional unit and the computation of the data is effected in a microprocessorand wherein the watch time can be controlled by the received GPS time.

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