Drawing table with drawing board relieved by gas spring

Claim 1

A drawing table with a support device for the drawing board comprising in combination a. a telescopic column means, b. brake means for rigidly interlocking said telescopic column means, c. a gas spring located within the telescopic column means which gas spring is preloaded with a pressure in excess of the pressure required to support the weight of the drawing board and its associated parts, d. a valve associated with said gas spring which is readily accessible so as to permit the introduction to and the removal of gas from said gas spring while said gas spring is in its mounted state within said telescopic column means, e. said column means comprising a column connected to a base plate and a tube movable within the column and connected with the drawing board proper, characterized in that it comprises a pair of brake shoes located between the column and the tube and acting in the direction towards each other and the tube, which shoes for locking the tube are adapted to move downwardly and inwardly towards the tube so that a self-locking action is effected against further movement of the tube downwards in relation to the column, whereby, after the entire drawing table and the equipment that is to be used thereon have been assembled, the gas which is in excess of that required to support the drawing board and itS equipment at the desired height can be discharged.