Patent ID: 9305445
Filing Date: 2016-04-05
CPC Classification: G08B

Claim Text:
1. An alarm system for a passageway defined by a first sidewall and a second sidewall, said alarm system comprising: lower passage indicator means disposed generally toward a lower end of the first sidewall and generally toward a lower end of the second sidewall for indicating passage through said passageway by a child or an adult, said lower passage indicator means configured to transmit sound waves across said passageway; upper passage indicator means disposed generally toward an upper end of the first sidewall and generally toward an upper end of the second sidewall for indicating passage through said passageway by the adult, said upper passage indicator means sufficiently spaced above said lower passage indicator means so as to not indicate passage through said passageway by the child, said upper passage indicator means configured to transmit sound waves across said passageway; and control means operatively connected to each of said lower passage indicator means and said upper passage indicator means for determining whether passage through said passageway is by the child or by the adult, said control means configured to generate a signal when passage through said passageway is by the child and to not generate said signal when passage through said passageway is by the adult.