GB499019A - Improvements relating to the protection of rooms or the interior of buildings or other confined spaces whether or not primarily intended for human habitation or occupation against harmful or undesirable external atmospheric influences - Google Patents

Abstract

499,019. Sealing doors and other openings. NEWTON, J. T. July 17, 1937, No.24189/38. Divided out of 499,035. [Class 20 (iii)] Doors, windows, &c. are hermetically sealed by inflatable tubing fitted between the doors &c. and their frames and simultaneously inflated through a valve actuated by an electric relay when all the doors &c. in the building are closed. As shown in Fig. 1, applied to a combined casement and fanlight window, the sealing- tubes 3 are fitted in channels 4 in the framing 5 and inflated through tubes 6 connected to a compressed-air supply 16, Fig. 4. In the open positions of the windows &c., the channels 4 are closed by spring-pressed plates 14 ; or, the channels may be covered by rubber strips which expand with the tubes 3 (on inflation of the latter) into the grooves 11 of the window &c. Fig. 4 shows means for automatically closing the windows &c., and inflating the sealing-tubes, through the medium of a manually-operated control. Each window &c. is linked to the piston 48 of a cylinder 49 which is supplied with compressed air from the source 16 and, after closure of all the windows &c., compressed air is led by piping 47 to the tubes 3. For indicating the closure of the windows &c., and the proper inflation of the sealing-tubes, a master-switch 54, associated with the valve 55 which controls the supply of compressed air to the cylinders 49, is arranged in a circuit comprising signal panels 56, 57 fitted with lamps 58, 58a, . . , 59, 59a ... Pairs of switches 61-62, 61-63 included in the circuits to the panels 56, 57 are opened, to extinguish the corresponding lamps, by the closing of the windows &c. and the inflation of the sealing-tubes. Specifications 498,992, 499,035, and 502,275 are referred to.