Personal computer access control lockout
First Claim
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1. A control device for controlling usage of a computer by controlling signals between a computer and an external display, the device comprising:
- a lock box comprising an external plug insertable into a video output port on a computer, an external receptacle for a plug from a display device external to the computer, an internal circuit interconnecting the external plug and external receptacle, the internal circuit comprising a switching means to connect and disconnect the internal circuit between the external plug and external receptacle for controlling display output from the computer to the display, a means of attaching the lock box to the computer with the external plug inserted in the video output port, the means of attaching positioned within the lock box, a removable cover for accessing the interior of the lock box, and a means of locking the cover on the lock box in a closed position to prevent access to the attaching means and thereby prevent removal of the lock box from the computer and to prevent tampering with the switching means by an unauthorized user, the device to provide control of the computer by turning off signals to the display when a user is unauthorized to use the computer so that with the display output disabled, the user is effectively unable to operate the computer.
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Abstract
A box has an external plug insertable in a video output receptacle of a computer with internal screws from the box to side screw holes. Locking the box cover prevents access to the screws. An external video plug receptacle receives the plug from the display screen. An internal circuit between the external plug and receptacle has a programmable microcontroller, a real time clock, and internal battery to control the amount of time and time of day video signals are sent from the computer to the display screen.
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Citations
22 Claims
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1. A control device for controlling usage of a computer by controlling signals between a computer and an external display, the device comprising:
a lock box comprising an external plug insertable into a video output port on a computer, an external receptacle for a plug from a display device external to the computer, an internal circuit interconnecting the external plug and external receptacle, the internal circuit comprising a switching means to connect and disconnect the internal circuit between the external plug and external receptacle for controlling display output from the computer to the display, a means of attaching the lock box to the computer with the external plug inserted in the video output port, the means of attaching positioned within the lock box, a removable cover for accessing the interior of the lock box, and a means of locking the cover on the lock box in a closed position to prevent access to the attaching means and thereby prevent removal of the lock box from the computer and to prevent tampering with the switching means by an unauthorized user, the device to provide control of the computer by turning off signals to the display when a user is unauthorized to use the computer so that with the display output disabled, the user is effectively unable to operate the computer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification