Anti-theft device for hoisting or striking a flag or the like

DETAILED DESCRIPTION The present invention relates to a device for automatically hoisting or striking a flag, a pennant, colors etc.
relative to a support structure, which device eliminates these drawbacks, by preventing the means which raise or lower the flag from being directly accessible to a user situated on the ground or close to the latter, in particular in the immediate proximity of the base of the pole carrying this flag or more generally of the support structure in question.
The invention also relates to a device which makes it possible for an authorised user to easily change the flag, in particular when replacing this flag by another carrying a different emblem or alternatively following deterioration or degradation of the initially hoisted flag, especially due to the climate, the wind or any other external cause.
For this purpose, the device in question, for hoisting or striking a flag or the like along a support structure, in particular a vertical pole, by means of a halyard interacting with a drive pulley mounted at the upper part of this pole and one end of which comprises a means for linking to the upper corner of the flag, the axle of the drive pulley being rotationally controlled, in the direction which rolls up the halyard to hoist the flag or unrolls it to strike the latter, by means of a reduction motor powered by an electrical energy source, is characterized in that the said source is controlled via a control circuit from a receiver sensitive to radiation, which is preferably encoded, originating from a transmitter situated remotely, the receiver and the reduction motor which control the drive pulley of the halyard being housed in a protection casing arranged at the upper part of the vertical pole, this casing comprising, at its part directed towards the ground, a bottom equipped with an opening which is sufficient to allow the halyard to pass through as it rolls up or unrolls on the pulley.
According to the case, the radiation supplied by the transmitter may be an electromagnetic radiation whose frequency corresponds to that of a radio wave, or alternatively an infrared, ultrasound or other radiation, whose energy is sufficient to ensure a robust and reliable link between the transmitter and the receiver