The detex is for a security guard, the guard would walk to the box, put the key in a device they carried and it would verify they did their rounds each hour. This was before computers.
@chadvaillancourt the above is correct. The security guard would carry around a device with a clock in it, it kinda resembles an old alarm clock with the bells on top. There was a paper strip inside, and the guard would insert the key and it would leave a imprint on the paper roll of what station it was, and what time it was visited. Super cool device actually. Similar systems are still in use today in malls and other large venues if you know where to look. There will be a small round magnet usually mounted to a wall plate, the guard will walk past and touch their wand to it to record they were there.
Googled the mill and there’s a wiki page saying the current building was completed in 1864, with the bricks being made on site. Would be interested if you can confirm that or not. Also a question regarding the quicklime. Do the bricks pull moisture out of the mix, and do you have to keep checking it to make sure it doesn’t dry out before it sets or can you just leave it once finished?
These particular bricks don't absorb much of the water. I do think it's good practice to cover it or keep wetting it if it's really hot for a couple of days. The date could very well be 1864 when it was completed. I think it was the guy in charge of maintenance who told me it was around 1900, but that was years ago.
All the salt and stuff splashes up on the bottom also one of the main reasons that brick is like that on that bottom.. I’m doing some restoration not to far from there in Portland
The detex is for a security guard, the guard would walk to the box, put the key in a device they carried and it would verify they did their rounds each hour. This was before computers.
Very interesting!
@chadvaillancourt the above is correct. The security guard would carry around a device with a clock in it, it kinda resembles an old alarm clock with the bells on top. There was a paper strip inside, and the guard would insert the key and it would leave a imprint on the paper roll of what station it was, and what time it was visited. Super cool device actually.
Similar systems are still in use today in malls and other large venues if you know where to look. There will be a small round magnet usually mounted to a wall plate, the guard will walk past and touch their wand to it to record they were there.
The long mortar rakes work pretty well for cutting out brick with softer mortar
Swept valleys must be a rare detail? Thanks for sharing.
The arbortech will only work for lime mortar. Don't even think about using it on anything with cement.
Exactly!
Spalling on the brick is because the mortar is too hard and doesn't allow the clay brick to expand when wet
Lime mortar also doesn't allow the brick to stay wet. Portland mortar holds the water in the system.
Googled the mill and there’s a wiki page saying the current building was completed in 1864, with the bricks being made on site. Would be interested if you can confirm that or not.
Also a question regarding the quicklime. Do the bricks pull moisture out of the mix, and do you have to keep checking it to make sure it doesn’t dry out before it sets or can you just leave it once finished?
These particular bricks don't absorb much of the water. I do think it's good practice to cover it or keep wetting it if it's really hot for a couple of days.
The date could very well be 1864 when it was completed. I think it was the guy in charge of maintenance who told me it was around 1900, but that was years ago.
All the salt and stuff splashes up on the bottom also one of the main reasons that brick is like that on that bottom.. I’m doing some restoration not to far from there in Portland