Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Process for repairing or laying a railroad track










Image Number 3 for United States Patent #4724653.

A levelling and shifting machine and a transmitter system (1) are used, the latter being installed on a carriage parked on the track and transmitting a spreading beam in the horizontal plane for levelling and a spreading beam in the vertical plane (Fr) for shifting, these beams defining an absolute measuring base. The receivers for levelling and shifting, which are installed on a measuring carriage of the machine, are designed for self-centering relative to the line of incidence of one of the said beams or the other during each measurement. In a curve of the track (3), the vertical beam (Fr) defines a cord of this curve, and the set position of the receiver defines the current value of the pitch of the curve (fm.sub.0, fm.sub.1 etc). A computer calculates the desired value of the pitch (f.sub.0, f.sub.1 etc.) and the variation (y.sub.0, Y.sub.1 etc.) between the two values, the latter variation determining the shifting correction.The measuring interval (G') covered by the machine without a change in the position of the transmitter (1) is selected greater than the length (G) of the cord, and the initial measuring point (A.sub.0) is selected on the secant passing through the cord beyond the point of intersection of the beam (Fr) and the track (3), so that the sum of the maximum pitches towards one side and the other is compatible with the travel of the receiver on its measuring carriage.








 
 
  Recently Added Patents
Differentiated PSIP table update interval technology
Semiconductor device, integrated circuit and method of manufacturing an integrated circuit
Wireless subscriber managing storage of HARQ packets
Embedded bonding pad for image sensors
Deadline-driven parallel execution of queries
Carrier or transport strip
Train car for proppant containers
  Randomly Featured Patents
Tool rack for coordinate measuring machine and corresponding tool
Watch
Print media products for generating high quality visual images and methods for producing the same
Method and apparatus for an electrical connector with binding posts and an RJ connector
Charged particle beam exposure apparatus and method
Reliability of diskless network-bootable computers using non-volatile memory cache
System for hardware assisted free list management
Apparatus and method for supplying a continuous source of wire
Dispenser for fluid material
Image processing device and image processing method