×

Rotatable aerial installation mounted on a mast with remote mechanical drive

  • US 4,209,789 A
  • Filed: 09/25/1978
  • Issued: 06/24/1980
  • Est. Priority Date: 09/30/1977
  • Status: Expired due to Term
First Claim
Patent Images

1. In a rotatable aerial installation, especially for ship-borne and ground satellite stations of the type having a mast at the upper end of which rotatable basket means contains the transmitting/receiving aerial, the improvement comprisinga turntable within the basket at the top of the mast mounted for rotation about a vertical axis,said turntable comprising a first rim with gearing for azimuth displacement of the aerial and a second rim with internal/external, double-gearing for elevational displacement of the aerial,differential gearing means comprising two drive shafts and two driven shafts,means for separately driving each of the drive shafts of the differential gearing,means for driving said first rim by means of one of the drive shafts of the differential gearing means,means for driving the second rim from the other of said drive shafts of the differential gearing means,a fixed wave guide extending upwardly to said turntable and concentric with the rotational axis of the latter,a quarter-wave joint mounted on the turntable and surrounding the upper end of said wave guide with a clearance therebetween,a wave guide probe extending from said turntable into said wave guide adapted to transmit signals between the wave guide and the aerial.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×