Control units for use with listed noncoded fire alarm boxes and listed bells to form manual auxiliary fire alarm systems for ... Supplementary control units for connection to master code and noncoded control units to provide additional alarm bell circuits. ... Type TPR-110. Marking: Llsteea#39;s name and type designation . C-O-Two Systems Div., The Fyr-Fyter Co., Newark 1, N. J. Change of name. ... Changes first paragraph as follows: aquot;Pyr-A-Larmaquot; Type C-A smoke detecting fire alarm system.
|Title||:||Bulletin of Research|