The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2002
Filed:
Jun. 28, 1999
Birger Hjertman, Vällingby, SE;
Anders Holte, Täby, SE;
Pharmacia AB, Stockholm, SE;
Abstract
A tilt sensing device and method for its operation, the device being of the type comprising (a) a housing, (b) a radiation transmitter and a radiation receiver arranged in or at the housing to form a beam path therebetween, (c) a radiation obstructing or deflecting body movable in relation to the beam path and (d) a rest surface for the body defining at least two possible rest positions for the body can move by gravity at defined tilt angles for the device and which rest positions are selected to give a detectable output difference from the radiation receiver depending on which of the rest positions is occupied by the body. The size of the movable body, expressed as the diameter of a sphere of corresponding volume, is less than 10 mm. Operation of the device includes monitoring the output from the receiver to obtain an amplitude versus time function and processing data from the function to obtain a modified signal.