Abstract: Unitary cartridge of plastic material for discharging a pyrotechnic mixture, smoke flare, chaff round, and the like is disclosed. A slidable piston is contained within a hollow casing forming the cartridge to engage with a portion of the casing to provide an internal integral seal for sealing a replaceable impulse cartridge and/or blank plug therein. A moisture proof seal is thereby maintained when the cartridge is armed by the insertion of an impulse cartridge or downloaded by the insertion of a blank plug. To facilitate the assembly of the cartridge, a rupturable closed end is provided with an internal lip adapted for engagement with an end plug to facilitate its alignment and positioning therein.

Abstract: A keyboard assembly for toy musical instruments, such assembly being executed in plastic and including a base with an upper section for receiving a plurality of tone bars and a lower section for receiving a like plurality of keys. Each key is removably mounted upon a discrete upstanding column on the base by a friction fit defined between the column and a pair of supports on the underside of the key; each column is formed of two resilient halves separated by a gap. Each key is an integrally formed, molded member comprised of several components with interrelated functions, such as (1) a key lever for manual depression, (2) a hammer at the end remote from the key lever, (3) a flexible segment for propelling the hammer against a tone bar in response to depression of a key lever, and (4) cooperating abutments for damping out reverberations of the hammer that might cause repeated strikings of the tone bar and/or chattering of the hammer.

Abstract: A cast plastic toy having a unitary U-shaped body including the side and top walls of the sound box, a bridge, a neck, apertures in pegboard at one end of the neck, strengthening ribs, and a barrier at the juncture of the neck and sound box. A paperboard bottom wall completes the sound box, and pegs are inserted through the apertures in the pegboard. Strings extend between the pegs and the bridge, and a continuous ridge on the upper surface of the sound box receives a paperboard insert therewithin. Apertures are formed in the sound box, and simulated manual control buttons are located on the upper surface of the sound box.