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:
Apr. 12, 1977
Filed:
Dec. 10, 1975
Leopold Wimmer, Norderstedt, DT;
Gunter Hofgen, Kornwestheim, DT;
Werner Poschadel, Kornwestheim, DT;
International Standard Electric Corporation, New York, NY (US);
Abstract
A ground station for VOR navigation systems with at least one transmitter and several radiators, which ground station radiates azimuth-dependent and azimuth-independent information. The azimuth-dependent information consists of the wave amplitude-modulated with 30 Hz in the field and generated by the superposition of the nondirectionally radiated VHF carrier on a VHF figure-8 directional pattern rotating at 30 Hz. The azimuth-independent reference wave consists of a 30-Hz wave which is contained as frequency modulated in a 9,960-Hz subcarrier wave amplitude-modulated on the VHF carrier. For the on-board identification of the simulated VOR signals radiated by the ground station and consisting of harmonics of the modulation frequencies of a VOR station transmitting on a first channel, the unmodulated carrier wave is amplitude-modulated, with the frequency of this modulation lying between the frequencies of the harmonics of the modulation frequency which occur at the limits of the bandwidth of the receiver set to a second channel adjacent to the first channel.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile