Abstract: An acoustic apparatus such as a radio receiver and tape player is mounted into an interior panel such as a dashboard of an automobile. The acoustic apparatus includes a housing having a size insertable into an aperture formed in the interior panel. The housing is inserted through the aperture from the front side of the interior panel and is firmly attached to the interior panel by manually actuating mount knobs provided in the front of the housing. A theft detecting circuit arrangement including a switch operable from the front side of the housing is provided in the housing and protective members are provided for covering the mount knobs. The protective members include operating plates for operating the switch. Upon the detachment of the protective member, the electric circuit arrangement is actuated to produce a warning signal to prevent the detachment of the acoustic apparatus from the interior panel without permission.

Abstract: A disk player that will receive removably a record jacket having a disk therein. The disk player is provided with a housing including a front panel with an insertion opening for said jacket, and a lid member adapted to said insertion opening. Said lid member is pivotally supported so that said lid member can be moved between the close position that prevents said jacket from being passed through said insertion opening and the open position that allows said jacket to be passed through said insertion opening, and is normally energized to be in said close position. A control member is provided that is supported movably between a lock position where said lid member is restrained in said close position and a release position where free movement of said lid member is secured. Said control member has a stopper member engageable with said lid member in said lock position and a cam follower section engageable with a corner section of said jacket when said jacket is going to be inserted into said insertion opening.

Abstract: A connector apparatus for introducing video signals of an alternative video signal source to antenna terminals in the form of a pair of screw rods that are spaced apart from each other and provided on the back surface of a television receiver.The connector apparatus is provided with a housing, means for receiving the end of a coaxial cable extending from the alternative video signal source to introduce the outer conductor and the inner conductor of the coaxial into the housing, a pair of lead members comprising electric conductors and having free ends extending outwardly from the housing, and means for connecting one end of each of the lead members to the inner conductor and the outer conductor of the coaxial cable.