What! You're supposed to use that thing on your lap? How the heck am I
supposed to see the screen then?
On 3/12/2013 8:20 PM, IBM Ken wrote:
Never heard that, however;
http://www.snopes.com/medical/toxins/laptop.asp
On Tue, Mar 12, 2013 at 11:10 PM, Bill Owsley <[email protected]
<mailto:[email protected]>> wrote:
There's an old story of the first IBM laptop that was going to the
show for promoting it.
The sales lady was using it on her lap... as in laptop.
And the heat generated over the flight time while she tuned the
presentation, yes we carried backup batteries; the heat "ironed"
her synthetic skirt to the panty hose she was wearing. When she
tried to stand to exit the plane... the skirt was stuck to the
panty hose and pulled down... New cooling system effort was
started the next day.
As I recall, there was a metal base and no fans for cooling as the
metal base was sufficient... in the lab...
Since then... all the devices, either EU's or IC's, I've run
across have thermal shutdown conditions.
But betting on "all" devices would be unwise.
I have run across way to many "substitutes" that do not follow
expected assumptions of performance, and cheep too!
------------------------------------------------------------------------
*From:* "Aldous, Scott" <[email protected]
<mailto:[email protected]>>
*To:* IBM Ken <[email protected] <mailto:[email protected]>>;
EMC-PSTC (E-mail) <[email protected]
<mailto:[email protected]>>
*Sent:* Tuesday, March 12, 2013 4:05 PM
*Subject:* RE: laptop -> house fire
I don’t believe it. Yes, a notebook computer will get hot with
the vents blocked. Will it generate enough heat to ignite
clothing it is resting on? I highly doubt it. According to
this website:
http://www.tcforensic.com.au/docs/article10.html
Cotton ignites at 250 degrees C (for some reason it’s in the
table for plastics). Even hay doesn’t ignite until it reaches
172 degrees C, according to the same site. Notebook computers
will not get that hot even with all vents blocked. Thanks to
the magic of Google, I happened to find a CB report online for
a notebook computer. I won’t link to it just in case it’s not
supposed to be public, but it got several blocked vent tests
(CB report issued by UL). It ran for several hours for each
test in ambients between 28 C and 29 C. The hottest
temperature recorded inside the computer, according to the
report, was 81 C. Cheesecloth was not charred or ignited for
any of the tests. It was a relatively low power computer (the
AC adapters it can use are rated 65W out), but there is a long
way to go from 81 C to 250 C.
There had to have been some additional type of fault there, as
has been suggested by John and Ted.
*Scott Aldous***
Compliance Manager/Engineering Lab Manager
AE Solar Energy
+1.970.492.2065 <tel:%2B1.970.492.2065> Direct
+1.970.407.5872 <tel:%2B1.970.407.5872> Fax
+1.541.312.3832 <tel:%2B1.541.312.3832> Main
[email protected] <mailto:[email protected]>
1625 Sharp Point Drive
Fort Collins, CO 80525
www.advanced-energy.com/solarenergy
<http://www.advanced-energy.com/solarenergy>
*From:*[email protected] <mailto:[email protected]>
[mailto:[email protected] <mailto:[email protected]>] *On
Behalf Of *IBM Ken
*Sent:* Tuesday, March 12, 2013 1:13 PM
*To:* EMC-PSTC (E-mail)
*Subject:* Re: laptop -> house fire
"/P.E.I. deputy fire marshal Robert Arsenault demonstrates how
vents on a laptop computer can be blocked when it is sitting
on a pile of clothes. (CBC)/"
Why did he pick that brand of laptop to demonstrate with? XD
Does anyone have more information on this incident?
On Tue, Mar 12, 2013 at 2:49 PM, Brian Oconnell
<[email protected] <mailto:[email protected]>>
wrote:
Blocked vent test anyone? Forseeable misuse? I like my
computers well done.
<www.cbc.ca/news/canada/prince-edward-island/story/2013/03/06/pei-laptop-hou
se-fire-computer-584.html
<http://www.cbc.ca/news/canada/prince-edward-island/story/2013/03/06/pei-laptop-house-fire-computer-584.html>>
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