Interesting. It could be an old Edwards smoke, a predecessor to the type shown below. I believe the below Edwards smoke came out in the late 80’s. So, it’s possible that the unknown smoke you saw was an early 80’s predecessor.
Here’s a Probe smoke detector.
This was probably a first generation Probe 101. But… I think I see the bottom of a brass squealer horn, and as far as I know, only the 200 Series AC alarms came with those horns. It is most likely a 101, however, because the 201 didn’t have open vents on the outside edge of the cover. I wonder if early 101’s used squealers.
Note that the 2nd generation Probe 101 had 3 rows of rings, rather than 2, like this one has.
I picked these up at a garage sale 3 years ago
Omg! That picture is way too big.
I have heard of those smoke detectors though. They are Detection Systems (Radionics) DS200 series, before they were bought out by Bosch. I might have seen them installed in my elementary school in the late 90’s. Then again, they could have been ESL 611U models. Very rare DS smokes! They are likely from the late 80’s.
Speaking of DS smokes, I have a few that are probably 10 years newer. They are a little more common, but still quite outdated. They are model DS284TH, as pictured below.
Sorry about the big picture. I can’t figuire out how to make it small.
I have one too
Omg, how do you make the pictures small,
Download the picture to your computer, then upload it to a file sharing site with support for size conversions. I recommend Postimage, that’s what I use for my pics. Resize the images to “Message board” or “Forum” size in the drop down menu.
Video showing a care facility with early 90’s smoke detectors. They look like Fenwal photo smokes with heat sensors. Apparently they are going to tear the old system out, and put in a new addressable system for 23 grand.
Sorry for the bump, but here’s info on the alarms:
#1 is probably the old BRK 769AC, since at 13:10 she says it’s the detector many contractors install.
#2 looks like the models that were made by Cassady Engineering and branded Gard•Site. These were also available in battery-powered, ionization models and were also rebranded by JCPenney. Here’s a picture of one.
Photo Storage 
#3 is an SA76RC, the test button can be seen but the way it was filmed/lit caused the reflections in the button to make it blend in. The black dot you see is probably some marking, probably the unit #. Also at 18:06 the way it starts (bi-bip-bip-beep-bee-bee-beeeep-BEEEEEEEP!) is a quirk with some of the alarms that used the 76RC/79R PCB. They would do this when the battery was low, notice you can hear several of the alarms beep throughout the video.
I do like this video, the variance in alarm sounds is cool compared to tests today’s versions of these tests which of course only have T3 alarms in them. Also I finally ordered the last 2 907A2’s, video of them to come.
Here’s a rare smoke alarm, my Westclox Smoke Signal (I believe it’s called). Picked it up at a garage sale, I love the sound of the buzzer in there. Idk if the smoke alarm was supposed to be coded like that, but either way it’s pretty neat.
Hey, that info is very much appreciated! Thanks.
Very cool factoid on the 76RC. I still need one for my collection of First Alerts from the 70’s to the 90’s.
So far, I have:
-the SA76RS (circa '77)
-the BRK 79DCRI (No clue as to it’s vintage)
-the 1st gen SA67D (mine’s labeled a SA76RD and is circa '87)
-the 2nd gen SA67D (circa '92, labeled 83R)
-and the Family Gard 1839N dated 1993.
Here’s one you probably already know, Mr. Lind. Looks much like an SA76 series, but a little different.
OK I got the 907A2’s.
Photo Storage 
Front, notice the dim LED.
Photo Storage 
Horn - Kobishi CLB series.
Photo Storage 
Back inc. mounting bracket.
They make a slow 4/6 – 5/6 alarm cadence when tested.
http://youtu.be/tfXdbGUy1GI - Video
1 Like
Cool video!
Again, sorry for the bump, but the sound of this detector is not like a 769AC. The 769AC made a continuous buzzer sound like the old Firexes did. I think they used the same AC Kobishi horn. But Detector #1 that was tested in that video made a different sound. It sounded like the DC Kobishi, but heavily modulated at 60Hz. So it sounded like one of those old AC Honeywell alarms.
the Tempasonic TS2 it has been discontinued because it is prone to false alarms it is a optical smoke detector
http://www.ebay.com/itm/111439969110
Family Gard FG777. Basically a SA76RS without test button. They then had the FG777C which used the RC platform. I had an FG777 in my original collection.
Who knows what kind of smoke detector this is?
Looks like a battery powered First Alert household smoke alarm from the early 90s.