Source: {"pile_set_name": "USPTO Backgrounds"}

1. Field of the Invention
The present invention relates generally to cartridge or disc operated computer and entertainment systems, and more particularly, to systems of such type that have deterrent devices for preventing unauthorized use thereof.
2. Description of the Prior Art
Many computer game and entertainment systems, such as the presently popular system sold under the name NINTENDO, are operated for countless hours by children, to the extent that their time for studies and household chores can be adversely affected. While parents may impose limitations on the period of use of such entertainment systems, these limitations can be easily forgotten or ignored. Likewise, parents frequently desire to prevent operation of videocassette players, particularly during their absence, so as to avoid the use of videocassettes which may be unsuitable for children's viewing, or again, simply to prevent the unlimited use of the entertainment system. While various types of deterrent devices have been proposed for preventing unauthorized use of such entertainment systems, these prior devices typically have been relatively complicated and difficult to use, or must be incorporated into the original design of the entertainment system so as not to be easily applicable to existing systems.
In addition, users of such computer game and entertainment systems, and particularly children, frequently inadvertently leave the access door to the system in an open position during periods of non-use. With the access door left open, dust and other foreign matter may accumulate about the cartridge or disc receiving opening of the system, which may lead to possible contamination and malfunctioning of the operating mechanisms of the system.
3. Objects and Summary of the Invention
It is an object of the present invention to provide the cartridge or disc operated entertainment system with relatively simple and inexpensive deterrent means for preventing unauthorized use of the system.
Another object is to provide a deterrent device that is particularly adapted for preventing unauthorized use of NINTENDO entertainment systems.
A further object is to provide a cartridge or disc operated entertainment system with shielding means for protecting the disc or cartridge receiving access opening of the system from dust or other foreign matter in the event the access door to the system is left open for extended periods of time.
Still another object is to provide a deterrent device and shielding means as characterized above which are adaptable for use with existing entertainment systems.
Yet another object is to provide a deterrent device of the foregoing type that is operable for preventing unauthorized use of the entertainment system and for locking the access door thereof in a closed position for protecting the access opening of the system from dust and foreign matter during periods of non-use.
Other objects and advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawings, in which: