ELECTRICALLY OPERATED MACHINES, SOLD AS A UNIT, FOR STORING ARTICLES ON AND REMOVING THEM FROM STORAGE RACKS

VENTILATION-CONTROL DEVICE, COMPRISING A FRAME WITH LOUVERS, ADAPTED TO BE MOUNTED IN AN AIR DUCT, AND VARIOUSLY USED AS AN AIR DAMPER FOR ORIFICING OR THROTTLING THE FLOW OF AIR, ALSO AS AN AIR OUTLET FOR DISTRIBUTING AIR INTO ROOMS OR OTHER VENTILATED SPACES, LIKEWISE AS A DEFLECTOR FOR PROPORTIONING AND GUIDING THE FLOW OF AIR TO AN AIR OUTLET, AND ALSO AS A GRILL FOR MASKING A VENTILATING OPENING