Door latch for alarm system

Details Door latch for alarm system Door latch for alarm system

2005-05-17

2005-05-17

Estremsky, Gary (Department: 3676)

Closure fasteners

Magnetic

C070S417000

Reexamination Certificate

active

06893060

ABSTRACT:
Door-lock hardware is constructed of corrosion-resistant material such as stainless steel. Such a material lacks magnetic properties to permit use in association with magnetic switches coupled to signal alarm and security systems. However, according to the preferred embodiment of the invention, a door latch of stainless steel or other non-magnetic material includes a ferrous-coated tongue portion to maintain compatibility with such monitors and alarms while providing a higher level of rust- and corrosion-resistance.

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patent: 6719334 (2004-04-01), Curtis

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