This disclosure is concerned with the improvement of motor-driven elevating apparatus for television receiver tables and the like residing in a novel drive transmission embodying notched pulleys and belts for controlling a screw drive, with a braking system actuable only upon the lowering of the table...http://www.google.fr/patents/US4151804?utm_source=gb-gplus-shareBrevet US4151804 - Elevating apparatus particularly adapted for television receiver support-tables and the like
Elevating apparatus particularly adapted for television receiver support ...
