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:
Oct. 07, 1980
Filed:
Feb. 22, 1979
Hans R Robertsson, Jonkoping, SE;
Saab-Scania AB, Linkoping, SE;
Abstract
Fan-shaped beams, sweeping angularly, substantially flatwise, across a solid angle space having the beam emitter at its apex, are modulated for transmission of special information to a selected one of a plurality of identically equipped bodies in that space. Whenever beam radiation reflected from a body is detected at the emitter, distance to the reflecting body is measured on the basis of radiation out-and-back time. If the body is at a distance for which special information is valid, the beam is modulated with such information for as long as its reflection from that body is received. A complete beam sweep cycle has a predetermined duration. As a basic condition for acceptance of special information, a body must receive such information on all beams during a predetermined time interval of at least that duration. As a further condition, a beam may be modulated with a characterizing sign whenever it intersects two bodies substantially simultaneously, and special information will be accepted at the body only if at least one beam lacks the characterizing sign.