BigKayCea:
This is one of two Air Products & Controls, Ltd. (APC) test stations I picked up. More than likely, this unit was used in a duct detector/HVAC system. I couldn’t get a good picture of the backside because of reflective metal, but it has a 24VDC piezo behind the speaker, along with a mess of wires and even a ‘Mulberry’ imprint, which I have no idea what that is supposed to represent. The model name is MS-RH/KA/P/A/T.
Reminds me of a similar Simplex test station I have (which is very similar, only with no trouble LED & some of the things on it rearranged).
BigKayCea:
This has to be one of my favorite finds since I started collecting. It is an ADT Type 774 control unit, part of the ‘Aero’ series. According to VintageCollections, it is believed this unit used to control pneumatic smoke detectors at some point in its life. Per an online search, this is a newer unit (dating to 1965), and other variants include break-glass stations.
Very interesting indeed…(very rare too for sure!)
I’m not sure who originally makes those bells, but several brands have been seen selling them, including Amseco & Kidde (System Sensor also sells similar models as well).
Pretty sure they are. Got a base to use it with?
BigKayCea:
The last item of the trade is also a forever favorite of mine. It is a National Time and Signal Corporation (Natsco) 514 horn, which came out of a nearby school after sitting disconnected for over a decade. There are also variants similar to this with surface-mount and possibly recessed options as well. There are even red-colored units.
A “514” rather than a 411F huh? Interesting…