Resources Contact Us Home Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE     Abnormal elevator speed detector Image Number 2 for United States Patent #4378059. An abnormal speed detector for an elevator system having an elevator car for servicing a plurality of floors, means for driving the elevator car in response to a speed command and a speed detector for detecting a running speed of the elevator car is disclosed. The abnormal speed detector comprises means for storing a set of speed data indicating a predetermined abnormal speed checking pattern as a function of running time or running distance of the elevator car, means for reading out of the storage means one of the set of speed data corresponding to an instant value of the running time or running position of the elevator car after the start of run, and means for comparing an actual speed of the elevator car with the readout speed data to determine if the speed of the elevator car is normal or not.       Recently Added Patents EZ dump lawn vacuum Method and system for managing user preference profiles in a network Method and apparatus for monitoring electrical properties of polymerization reactor wall film Lockless queues Automated text-based messaging interaction using natural language understanding technologies Lockout cabinet Method, apparatus, and system for time synchronization of XDSL   Randomly Featured Patents Latch-up prevention for memory cells Process for producing aromatic compounds by supercritical water treatment Data processing apparatus Semiconductor device including main substrate and sub substrates Optical disk device Reinforced polymer valve Method of making a readily portable burrito Pellet-forming mold for dental filling materials Amidinoureas Method for fabricating semiconductor light emitting device © 2006-2008 PatentGenius. All Rights Reserved.