Abstract: Acessory device for an inflatable gas ballon (1) having, for inflation of the balloon (1) an elastically expansible tube-shaped balloon neck (1a), with a sealing head (2) for the balloon neck (1a ) and an electric lamp (14) for internal illumination of the balloon (1). According to the invention, the sealing head (2) is constructed as a cup-shaped housing (7) having an open end and an end closed by a bottom (7'), the open end being adapted to be inserted in sealing-tight fashion into and elastically expanding the balloon neck (1a). Disposed in the open end of the housing (7) is a light reflector (15) which surrounds the electric bulb (14) which is electrically connected to an electro-mechanical coupling in the form of a screw-type bulb cap (8) which is provided for simultaneous establishment of an electrical connection of the lamp (14) to an external power source and for mechanical supporting of the sealing head (2).

Abstract: Accessory device for a gas balloon having, bounding its interior, an inflatable balloon envelope (1) on which is constructed a balloon neck (1a) for inflation of the balloon envelope (1). According to the invention, there is on a sealing head (2) adapted to be inserted in sealing-tight fashion into the balloon neck (1a) a sound irradiating device (20) such as a loudspeaker for irradiating sound into the interior of the gas balloon (FIG. 1).

Abstract: A balloon closure head for mounting a balloon and a lamp for illuminating the balloon, as well as apparatus for conducting air to inflate and deflate the balloon and apparatus for conducting electricity to the lamp. The conducting apparatus employs needle nose piercing elements which pierce supply channels for both gas and electricity carried by rectangular conduits sealably clamped to the closure head. In one embodiment, a single pair of conductive hollow needle nose piercing elements and cooperating non-return valves supply both gas for the balloon and electricity for the lamp.