Mark P Posted April 17, 2007 Report Share Posted April 17, 2007 These were in almost all the rooms of the house, built in 1950. Best I could tell it is maybe some sort of speaker system. Download Attachment: 1.jpg 45.58 KB Download Attachment: 2.jpg 54.98 KB Quote Link to comment Share on other sites More sharing options...
StevenT Posted April 17, 2007 Report Share Posted April 17, 2007 I never saw one of those. Maybe you are right, some sort of early intercom system. Quote Link to comment Share on other sites More sharing options...
Inspectorjoe Posted April 17, 2007 Report Share Posted April 17, 2007 They're heat detectors for a fire alarm system. On the one mounted on its edge, you can see that it's rated for 135 degrees f. Needless to say, they've long been obsolete. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted April 17, 2007 Report Share Posted April 17, 2007 Originally posted by Inspectorjoe They're heat detectors for a fire alarm system. On the one mounted on its edge, you can see that it's rated for 135 degrees f. Needless to say, they've long been obsolete. Aw, shoot! I was hoping that they were Russian bugs left over from the cold war. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
Mark P Posted April 17, 2007 Author Report Share Posted April 17, 2007 Heat detectors, cool! Quote Link to comment Share on other sites More sharing options...
chicago Posted April 18, 2007 Report Share Posted April 18, 2007 Looks like something you would have built from one of those old radio shack kits. Quote Link to comment Share on other sites More sharing options...
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