Communications: electrical – Continuously variable indicating – With meter reading
Patent
1997-07-25
1999-03-02
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
348 55, 348 6, H04M 1100, H04N 700
Patent
active
058776974
ABSTRACT:
A security system, for use with a chassis enclosing electrical circuitry and having a lid movable relative to the chassis to allow access to the electrical circuitry, including: (1) a plurality of switches, couplable to the electrical circuitry, that are configured to store a security code readable by the electrical circuitry and (2) a trip mechanism, coupled to the chassis, that alters the security code stored by the plurality of switches when the lid is moved relative to the chassis, whereby the electrical circuitry may detect that the lid has been moved by detecting that the security code has been altered.
REFERENCES:
patent: 5604528 (1997-02-01), Edwards et al.
patent: 5764729 (1998-06-01), Black et al.
Paas Terrance J.
Wild Ronald L.
Beaulieu Yonel
Lucent Technologies - Inc.
Zimmerman Brian
LandOfFree
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