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On Friday, September 22, 2017 at 8:13:45 AM UTC-4, Foxs Mercantile
wrote:
On 9/22/2017 2:16 AM, rickman wrote:
Might have run off the air compressor which remains pressurized
for some time after a power failure. It\'s hard to imagine such
a small change in volume producing enough work to ring a bell.
In the 4 stations I worked at as a gopher in the late \'60s, NONE
of them had electric bells.
And NO, the hose wasn\'t full of air. It was full of oil.
The striker would hit the bell going up when someone rolled over
the hose, and again on the way down when they rolled off the
hose.
Hence the da-ding every time.
Kathy Kehoe <kathy...@gmail.com> wrote in
news:120a0591-fd50-45b6...@googlegroups.com:
On Friday, September 22, 2017 at 8:13:45 AM UTC-4, Foxs Mercantile
wrote:
On 9/22/2017 2:16 AM, rickman wrote:
Might have run off the air compressor which remains pressurized
for some time after a power failure. It\'s hard to imagine such
a small change in volume producing enough work to ring a bell.
In the 4 stations I worked at as a gopher in the late \'60s, NONE
of them had electric bells.
And NO, the hose wasn\'t full of air. It was full of oil.
The striker would hit the bell going up when someone rolled over
the hose, and again on the way down when they rolled off the
hose.
Hence the da-ding every time.
The hoses were air filled with capped ends, and the pressure
differential flipped a switch and that powered a solenoid which then
struck the bell.
Same thing for road lane vehicle counting machines which cops put
out in place to place from time to time.
Air works just fine.
All the ones I saw had a hose that was filled with atirsdag den 24. maj 2022 kl. 18.19.28 UTC+2 skrev DecadentLinux...@decadence.org:
Kathy Kehoe <kathy...@gmail.com> wrote in
news:120a0591-fd50-45b6...@googlegroups.com:
On Friday, September 22, 2017 at 8:13:45 AM UTC-4, Foxs Mercantile
wrote:
On 9/22/2017 2:16 AM, rickman wrote:
Might have run off the air compressor which remains pressurized
for some time after a power failure. It\'s hard to imagine such
a small change in volume producing enough work to ring a bell.
In the 4 stations I worked at as a gopher in the late \'60s, NONE
of them had electric bells.
And NO, the hose wasn\'t full of air. It was full of oil.
The striker would hit the bell going up when someone rolled over
the hose, and again on the way down when they rolled off the
hose.
Hence the da-ding every time.
The hoses were air filled with capped ends, and the pressure
differential flipped a switch and that powered a solenoid which then
struck the bell.
Same thing for road lane vehicle counting machines which cops put
out in place to place from time to time.
Air works just fine.
https://youtu.be/mjVz-72r44g