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#327784 - 25/11/2009 23:09 But.... how does it KNOW?
tanstaafl.
carpal tunnel

Registered: 08/07/1999
Posts: 5544
Loc: Ajijic, Mexico
I sleep in a Queen-sized bed complete with a warm and snuggly electric blanket.

When I go to bed, I set the blanket to "4" and all is right with the world. In the morning, the blanket is still working away keeping me all toasty warm. I never, ever remember to turn it off, but when I come back a couple hours later, it has turned itself off.

How does it know I am no longer in the bed?

tanstaafl.
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#327785 - 25/11/2009 23:27 Re: But.... how does it KNOW? [Re: tanstaafl.]
ricin
veteran

Registered: 19/06/2000
Posts: 1495
Loc: US: CA
It turns off after a certain amount of time? Probably somewhere been 8-12 hours.
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#327786 - 26/11/2009 00:25 Re: But.... how does it KNOW? [Re: ricin]
gbeer
carpal tunnel

Registered: 17/12/2000
Posts: 2665
Loc: Manteca, California
They also have over temp protection, for when a blanket gets piled in a jumble.
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#327787 - 26/11/2009 01:11 Re: But.... how does it KNOW? [Re: gbeer]
Robotic
pooh-bah

Registered: 06/04/2005
Posts: 2026
Loc: Seattle transplant
I just got an electric blanket and I thought I'd power it through a timer.
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#327788 - 26/11/2009 02:22 Re: But.... how does it KNOW? [Re: Robotic]
jimhogan
carpal tunnel

Registered: 06/10/1999
Posts: 2591
Loc: Seattle, WA, U.S.A.
Originally Posted By: Robotic
I just got an electric blanket and I thought I'd power it through a timer.

Nostalgia moment. In 1978-79, my roomie and I struggled to pay our oil heating bills for the 6-room apartment we rented in an uninsulated triple decker in Jamaica Plain (Boston). He was a 4th-year med student so was never around and I worked graveyard shift in an emergency room/department. We kept the thermostat set at around 52 degrees -- just enough to keep most of the pipes from freezing. On days when we thought we might meet up and make dinner, we turned the thermostat up to about 66F for a few hours.

To improve the chances of sleep, I had disconnected the front door bell, draped stolen wool army blankets over my bedroom windows and I routinely disconnected the telephone before going to bed each morning. I bought a little mechanical light timer at a hardware store in Brookline and every morning at 6:30 AM, it turned on a blue Sunbeam electric blanket. So, by the time I got home around 7:30, all I needed to do was to tune my Zenith TV to channel 3 for white noise, shuck off my grubby clothes, and roll into bed before I passed out.

Not sure about then, but all of the electric blankets now have timers that will turn them off after a set number of hours.
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'Tis the exceptional fellow who lies awake at night thinking of his successes.

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#327793 - 26/11/2009 16:48 Re: But.... how does it KNOW? [Re: tanstaafl.]
Dignan
carpal tunnel

Registered: 08/03/2000
Posts: 12320
Loc: Sterling, VA
Originally Posted By: tanstaafl.
In the morning, the blanket is still working away...when I come back a couple hours later, it has turned itself off.

I wish mine did the same. I bought one for my wife (so I could keep the house cooler smile ), and it freakin' turns its self off after 30 minutes. Ridiculous.
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#327794 - 26/11/2009 21:05 Re: But.... how does it KNOW? [Re: jimhogan]
tanstaafl.
carpal tunnel

Registered: 08/07/1999
Posts: 5544
Loc: Ajijic, Mexico
Originally Posted By: jimhogan
Not sure about then, but all of the electric blankets now have timers that will turn them off after a set number of hours.


This blanket is about a year old, there is no timer. Just a button to turn it on or off and a rotary dial to select the temperature.

tanstaafl.
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#327795 - 26/11/2009 21:18 Re: But.... how does it KNOW? [Re: tanstaafl.]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14484
Loc: Canada
Probably works like the soldering station here or something. I often forget to turn it off, but it detects "stability" and turns itself off after half an hour or so.

Or maybe they have a capacitance sensing wire woven in, and if it doesn't change (nobody moving about in bed) then it figures nobody is in bed.

Cheers

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#327796 - 26/11/2009 21:30 Re: But.... how does it KNOW? [Re: mlord]
jimhogan
carpal tunnel

Registered: 06/10/1999
Posts: 2591
Loc: Seattle, WA, U.S.A.
Originally Posted By: mlord
Probably works like the soldering station here or something. I often forget to turn it off, but it detects "stability" and turns itself off after half an hour or so.

Or maybe they have a capacitance sensing wire woven in, and if it doesn't change (nobody moving about in bed) then it figures nobody is in bed.

Cheers


mark, Doug,

I shouldn't make a claim about "all" electric blankets as I can only really go on the basis of the two I have owned since ~1990. There is a UL 964 standard for these in the US, but I can't tell if it mandates a shutoff. Anyhow, the one I have on my boat turns off after a while and it won't turn on just by plugging it in (you have to press a button) so it couldn't be used as I did way back when to heat bed up in advance of arrival on scene.

I see there is even an "Electric Blanket Institute" but not much info.
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Jim


'Tis the exceptional fellow who lies awake at night thinking of his successes.

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#327801 - 27/11/2009 16:08 Re: But.... how does it KNOW? [Re: mlord]
gbeer
carpal tunnel

Registered: 17/12/2000
Posts: 2665
Loc: Manteca, California
Originally Posted By: mlord

Or maybe they have a capacitance sensing wire woven in, and if it doesn't change (nobody moving about in bed) then it figures nobody is in bed.

Cheers


Ha! Sounds tailor made for the Nookie police.

No doubt it has multi-point touch capability.
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Glenn

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