Abstract: A portable vacuum apparatus comprises a vacuum chamber to be filled with lidded jars, bottles or other containers containing foodstuff or other products for the purpose of storing the contents under vacuum. The vacuum chamber is composed of a platform covered by a layer of a resilient material serving as a seal, and of a removable cover seated on the platform. The chamber is pipe-connected to an electrically operated vacuum pump and to an automatic valve connecting the chamber with the atmosphere in open state. To evacuate the chamber and the jars the valve is manually closed and the pump is started exhausting air from the chamber and the jars. The valve is adapted to open automatically as soon as the required vacuum has been reached and to interrupt the electric supply to the pump motor. The valve is designed to open a wide passageway to the chamber causing the air to rush in and to create a shock wave.

Abstract: A desk includes a compartment for a silent printer designed to prevent dirt and dust from entering it. The compartment is in the form of a drawer fitting closely into a stationary portion of the desk and includes of a bottom supporting the printer and a front panel, the front panel fitting closely into the opening of the stationary portion. The drawer is movable to the front of the desk while gliding on horizontal guides on the side walls and on a wheel attached to the front and moving along the floor. A blower with a filter is mounted on the outside of the desk and blows clean air into the compartment. A narrow slot in the desk top serves for passage of the printer output.