GB330878A - Improvements in and relating to the ventilation of vehicles - Google Patents

Abstract

330,878. Wise, C., and Dumbleton, G. H. March 11, 1929. No Patent granted (Sealing fee not paid). Bodies.-In a ventilating system for motor vehicles of the type in which longitudinally extending air ducts are formed in the roof of the vehicle and are connected with the interior thereof by controlled apertures through which, during movement of the vehicle, air may be introduced into and extracted from the interior of the vehicle, the cross members which support the roof covering are formed with apertures between adjacent roof longitudinals and the space or spaces between the longitudinals enclosed to form one or more ducts for the ventilation of the vehicle. A funnel-like member 1, Fig. 1, is arranged in the front of the canopy 2 so that when the vehicle is in motion air is both forced and sucked into this funnel; baffle plates 4 and gauze covering the inlet serve to retain moisture &c. The air passes into one or more ducts 11, which are formed in the spaces between pairs of roof longitudinals 8 by constructing the cross members with holes 10 and attaching waterproof material 12 to the inner side of the longitudinals. When a regulator 18 is open part of the air is deflected by a plate 24 to pass into the vehicle. The regulator comprises a fixed member 20 having a number of holes therein, and a movable member 22 with a corresponding number of similar holes. The other portion of the air passes to the rear of the vehicle and over a plate 27 where, when a regulartor 26 is open, this current of air causes a flow of air from the interior of the vehicle. Discharge occurs at the outlet 14. In the case of a vehicle with a sliding roof in which the movable portion 29, Fig. 3, of the roof slides under the rear fixed portion 28, the inlet of the duct 11 is formed by a hinged flap 30 controlled e.g. by a Bowden wire. When. the movable portion of the roof slides over the rear fixed portion, the forward end of the air duct may open into the forward end of the fixed portion of the roof. When the roof is opened by movable portions which slide laterally, the front end of the duct may be formed partly in each of the movable portions of the roof along their abutting edges. In all the above cases the opening at the front end of the duct may be dispensed with and the regulators arranged so that the partial vacuum at the rear of the vehicle when the vehicle is in motion is utilized to extract air from the interior thereof. Also separate ducts may be used for the supply of air to the interior of the vehicle and the extraction of air therefrom. The first Provisional Specification states that the walls of the duct may be formed of timber or metal and separate from the roof of the vehicle, and also that the invention may be applied to vehicles other than motorvehicles, e.g. railway carriages and aircraft. The second Provisional Specification states that the inlet duct may be arranged at the bottom of the vehicle and the extraction duct in the roof.