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Thread Number: 44595
/ Tag: 50s/60s/70s Vacuum Cleaners
Obscure industrial vacuums |
[Down to Last] |  |
| Post# 463736 , Reply# 1 6/9/2023 at 21:28 (342 days old) by human (Pines of Carolina) | ||
chalk => marker transition...
I can't speak to this definitively, but the community college where I teach did away with the last of its chalkboards around 2009 or 2010. Part of that process was to install ceiling-mounted video projectors, using the whiteboards as projection screens. In that way, the whiteboards have an expanded functionality over blackboards. My only complaint is that the college cheaped out on the classrooms they retrofitted by installing whiteboards that are smaller than the chalkboards they replaced, and thus it becomes effectively an either/or choice as to which way to use them. All in all, I do not miss the chalkboards at all.
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Post# 463737 , Reply# 2 6/9/2023 at 22:03 (342 days old) by KirbyClassicIII  (Milwaukie, Oregon) |
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texaskirbyguy
Rob,
The Kirby COMVAC series is also obscure... they were made for only three years: 1982-1984. I have the 1600, but I am still looking for its smaller brother, the 1300 (Sanitronic-style motor). ~Ben | ||
| Post# 463739 , Reply# 3 6/9/2023 at 22:40 (342 days old) by huskyvacs (Gnaw Bone, Indiana) | ||
 The reason they replaced chalkboards was I believe some unfounded hokey that inhaling chalk dust and exposure to chalk led to respiratory problems and cancer. Was never proven as far as I know. I remember when I was in elementary school (this was the early millennium) kids were messing around with the teacher and took the erasers and just chucked them out the window when her back was turned (this was a 3 story school). The class thought that was a riot. Oh and the age old task of holding the erasers out the window and smacking all the dust out still went on into that era. I think by the time I got to high school was the transition period of whiteboards (2008+). Some classrooms had them, others did not. All schools in my area now I believe have switched over to whiteboards. I remember for the past few years seeing lots of old chalkboards with school property stickers on them popping up in the thrift stores around here every now and again for several years. | ||
| Post# 463744 , Reply# 5 6/10/2023 at 01:46 (342 days old) by huskyvacs (Gnaw Bone, Indiana) | ||
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Chalkboard eraser vacuum - I seen one on eBay on Dec 24, 2020. I didn't buy it. Didn't have a use for it or they wanted too much money, I don't recall which. | ||
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