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:
Aug. 22, 1989
Filed:
Nov. 02, 1987
Joseph Apperson, Mickleover, GB;
British Railways Board, London, GB;
Abstract
An improved control system is described for controlling the passage of a vehicle between certain control points, the control is achieved by passing electronic tokens, which permit movement of the vehicle past a control point, between a signal box and the vehicle via a first data communications channel which is security interlocked by solid state interlocking in the data channel. A communications processor is included in the interlocking and forms part of the vital safety system of the interlocking. The improvement comprises the provision of a second data communications channel between the signal box and train, this second channel interfacing with the solid state interlocking. At the signal box a keyboard may be provided for feeding data to the interlocking and the second communications channel may communicate with the vital part of the solid state interlocking via a similar route to the keyboard.