Hood intrusion and loss of AC power detection with automatic time stamp
First Claim
Patent Images
1. A method of detecting removal of a component of an electrical system, comprising the steps of:
- triggering a detection circuit upon removal of a component;
disconnecting a counter within the detection circuit to retain data related to when said component was removed; and
storing the retained data in non-volatile memory.
0 Assignments
0 Petitions
Accused Products
Abstract
A battery-powered computer chassis intrusion detection circuit which stores the time and date that the chassis hood, components, or AC power was removed. When intrusion occurs, an alarm bit isolates the detection circuit oscillator from the circuit, effectively stopping a real time clock from incrementing the time and date. When the computer is powered back up, internal ROM checks to see if an alarm condition occurred. If so, the intrusion date and time is recorded and the user or administrator may be alerted.
-
Citations
24 Claims
-
1. A method of detecting removal of a component of an electrical system, comprising the steps of:
-
triggering a detection circuit upon removal of a component; disconnecting a counter within the detection circuit to retain data related to when said component was removed; and storing the retained data in non-volatile memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for detecting loss of power to a portion of a system, comprising the steps of:
-
triggering a detection circuit upon loss of power; disconnecting a counter within the detection circuit to retain data related to when said loss of power occurred; and storing the retained data in non-volatile memory. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A method for detecting removal of a component of a system, comprising the steps of:
-
when a component is removed generating a signal; using said signal to stop a clock; and recording the value of said clock. - View Dependent Claims (17, 18, 19, 20)
-
-
21. A computer system, comprising:
a chassis with a removable cover, said removable cover providing internal access to said chassis, said chassis housing internal components of said computer, said internal components comprising; one or more microprocessors which are operatively connected to detect inputs from an input device; memory which is connected to be read/write accessible by said microprocessor; one or more devices for mass storage of data, and an output device operatively connected to receive outputs from said microprocessor; one or more power supplies connected to provide power to said internal components; and a detection circuit comprising an internal clock and which stores data related to when said components or said removable cover is removed. - View Dependent Claims (22, 23, 24)
Specification