Thomson-csf

Jean-Marc Martin

Francois Ursenbach

Rene Chesneau

Maurice Paliard

Benoit Valdelievre

Francis Cochet

The disclosure relates to broadcasting by means of rotary antennas using wire dipoles. Two distinct feeder channels respectively leave two transmitters, go through the joint that separates the fixed support from the mobile part of the rotary antenna, then go out horizontally, on either side of the mast, taking support on the bearing structure of the rotary antenna to then rise vertically to the supply points of the dipoles of two distinct vertical groupings of the dipoles: it is thus possible to carry out two simultaneous transmissions from one and the same rotary antenna. Application to broadcasting in decameter waves.

Broadcasting set comprising a wire-dipole rotary antenna and rotating

The disclosure relates to broadcasting by means of rotary antennas using rigid dipoles. Each of two distinct channels passes through the joint between the fixed support of the mobile part of the antenna and rise vertically into the interior of the mast to respectively reach two distinct vertical groups of dipoles. It is thus possible to carry out two simultaneous transmissions from one and the same rotary antenna. Application to broadcasting in decameter waves.

Broadcasting set comprising a rigid-dipole rotary antenna and rotating

The antenna is a rotating dipole antenna comprising a base, a rigid support rotatably mounted on the base, a plurality of wire dipoles fixed to the support, and means to feed each dipole with electrical energy from a first end of said dipole. In order to provide for the efficient fastening of the dipoles, the rigid support extends before at least the first end of each dipole, and this first end is fixed directly to the rigid support while the second ends of the dipoles are either fixed directly to the rigid support or connected to it by a catenary supported on the support. The antenna can be applied to the designing of power antennas in the decametric wave range.

Rotating antenna with wire dipoles

The invention concerns an inductance device formed on the basis of an asymmetrical line. This inductance device includes a plane conductor, preferably cylindrical, a linear conductor extending along and close to the plane conductor and having one end short-circuited with the plane conductor. Positioning devices make it possible to keep the linear conductor in a determined position in relation to the plane conductor. The inductance device is particularly used for the manufacture of power inductances for short waves.

Inductance device, particularly for short waves

The disclosure concerns an assembly formed by a large-sized antenna with a supporting mast, the working of which brings the ground plane into play, and by a high-power transmitter. To reduce the distance between the transmitter and the radiating part of the antenna, and to reduce the cost of the architectural structure of the antenna and of the room sheltering the transmitter, this room is formed by the base of the mast which supports the antenna. The dimensions and bed of the base of the mast are designed as a function of the space needed and of the stability to be given to the antenna.

Architectural structure combining at least one antenna with supporting

A system comprising a roll press for crushing and partially agglomerating a mineral material, a conveyor means arranged downstream of this press and associated with a distributor device and allowing to recycle one portion of the crushed and partially agglomerated material to the inlet of the press whereas the other portion of the material issuing from this distributor device feeds a second distributor device one outlet of which communicates with the conveyor means to thereby control the amount and density of the crushed and partially agglomerated material recycled to the feed of the press.

Method of crushing and compacting any mineral material whatsoever and

A vertical grounded antenna is supplied at one third of its height. The antenna is substantially a whole wave antenna and, in order to reduce the secondary lobes of the vertical pattern of said antenna, its height is so determined as to produce an inversion of the sign of the phase of the current on each side of the feed input.

Vertical antenna having an off-center supply

A whole wave antenna is placed on an insulating support and has its feed input located a little above its middle. In order to reduce secondary lobes inductive reactances are serially inserted in the antenna on each side of its feed input so as to produce a rapid rotation with inversion of the phase of the currents on each side of the feed input.

Growing community of inventors

St Leu la Foret, France

Jean-Marc Martin