By Mary Bellis
Marie Brown
The first video home security system
was patented (patent #3,482,037) on December 2, 1969 to Marie Brown. The
system used television surveillance.
Sidney Jacoby
Combination smoke and heat detector
alarm
Patent Abstract - Sidney Jacoby
- 3,938,115 - February 10, 1976
A combination smoke and heat detector
alarm including a self contained stored energy source in the form of a
cylinder of compressed gas. A T-fitting connects to the cylinder and feeds
separate conduit systems leading to individual sounding devices. A fusible
element is interposed in one of the conduit systems to automatically permit
transfer of the compressed gas to a first sounding device upon the presence
of elevated temperatures. A solenoid operated switch is interposed in the
other conduit system to normally prevent the flow of gas. The solenoid
is responsive to a smoke detector and is wired to open the solenoid valve
upon sensing the presence of a predetermined concentration of smoke.
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