Marie Brown worked as a nurse and her husband, Albert Brown, worked as an electronics technician

 

Marie Van Brittan Brown 

(1922-1999)

 

 Marie Brown worked as a nurse and her husband, Albert Brown, worked as an electronics technician. Their work hours were not the standard nine-to-five, and the crime rate in their Queens, New York City neighborhood was very high.

 

 Even when the police were contacted in the event of an emergency, the response time tended to be slow. 

 

As a result, Brown looked for ways to increase her level of personal security. She needed to create a system that would allow her to know who was at her home and contact relevant authorities as quickly as possible.