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Inventor offers blade-braking technology

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Forum topic by Joe Lyddon posted 05-02-2012 08:49 PM 1639 views 0 times favorited 15 replies Add to Favorites Watch
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Joe Lyddon

7721 posts in 2707 days


05-02-2012 08:49 PM

Topic tags/keywords: david butler whirlwind tool co cotuit mass inventor black box blade-braking blade stopping technology table saw safety bolt-on woodshop news shuts down motor compete saw stop saw-stop device removable non damaging

Here is a very interesting development!
A blade stopping device that can be used with EXISTING table saws!

Read that again…!

Think about that!

Now, That is quite an innovation… I can buy it, if I want to, install it, etc. IF I WANT TO!

It’s not on the market yet… but, it looks like it’s coming!

As reported on WoodShop News 5-2-12…

Original text in case the Link turn bad:
————————————————————————-

Inventor offers blade-braking technology

Posted on Wednesday, 02 May 2012 00:00


David Butler, owner of Whirlwind Tool Co. in Cotuit, Mass., has received a patent on a table saw safety product called the Black Box, which features emergency-blade braking technology.

Butler, a woodworking hobbyist with a background in engineering, says the product is currently in a prototype state and is not available for sale, but he does hope to eventually market the design.

The Black Box is a bolt-on, removable device that can be used on an existing saw and other woodworking machines. Once the operator approaches or touches the clear blade guard fence wired to the Black Box, a proximity detector senses flesh and immediately shuts down the saw’s motor. The blade stops in about an eighth of a second without being damaged, according to Butler.

“What my product does is sense the operator touching the outside of the guard before they can get to the saw blade. That can give them a lot more time and can stop the motor and the blade in less than one second, which should be before the operator can get to the blade if they’re doing things properly,” Butler said.

— Jennifer Hicks

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How does That grab you?

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"


15 replies so far

View PurpLev's profile

PurpLev

8476 posts in 2303 days


#1 posted 05-02-2012 08:53 PM

been ‘in development’ for the past couple of years at least. all in all – a good alternative. has it’s drawbacks, but has it’s advantages as well. I guess no one has funded this as of yet. there were a few posts about this here on LJ in the past.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Sawkerf's profile

Sawkerf

1730 posts in 1723 days


#2 posted 05-02-2012 09:48 PM

Having the trip action trigger when the blade guard is touched instead of the blade is an interesting concept – and a way to get around Sawstop’s patents. i’ll need to see one in action before I’m sold, however.

-- Adversity doesn't build character...................it reveals it.

View darryl's profile

darryl

1792 posts in 2981 days


#3 posted 05-02-2012 10:04 PM

i never put the blade guard on my saw as i tend to use sleds for most of my cutting. I’m just going to keep saving up to buy the sawstop.

View crank49's profile

crank49

3434 posts in 1626 days


#4 posted 05-02-2012 10:42 PM

New technology NOT.

This is the same tired old idea we have been seeing dregged up again.

Bottom line, it is a proximity sensor on a blade guard.

You approach the blade guard and the “black box” controler electrically stops the motor. . . in 1/8th of a second.

Gee whiz. Let’s see, a blade spinning at 4000 RPM gets stopped in 1/8th of a second.
That’s 4000 divided by 60 seconds and divided by 8 eights in a second so a little over 8 revolutions.

I wonder if a 10” blade with 40 razor sharp teeth spinning 8 revolutions would be able to saw off a finger.
I aint sticking my hotdog in that thing to see.

Also, if it did do anything worthwhile it won’t do it unless the blade guard is in place. We all know how many people always keep the blade guard in place.

Of course, there would be some minor inconveniences like no miter sleds I ever saw fit under a blade guard, and likewise, no tennoning or finger joint jig. Might be a problem with dados , or any other non-through-cuts as well.

This thing hasn’t made it to market in the 2 or 3 years it’s been being reported as “in development” for a good reason. It’s a retarded idea.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View harry1's profile

harry1

512 posts in 940 days


#5 posted 05-03-2012 02:23 AM

which should be before the operator can get to the blade if they’re doing things properly,” Butler said.

The above sentence should scare anyone away from such a device. As for the sawstop, I’ll be convinced when the demonstrator uses his finger rather than a sausage for the test!

-- Harry, Western Australia

View Mark Shymanski's profile

Mark Shymanski

5111 posts in 2367 days


#6 posted 05-03-2012 02:40 AM

Mr. Glass did stick his finger in a running blade for that high speed photography show a while back. Edit: Gass not Glass oops

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View Jeremy Greiner's profile

Jeremy Greiner

568 posts in 1427 days


#7 posted 05-03-2012 02:47 AM

@harry1
He did that on an episode of time warp in slow motion camera goodness
http://www.youtube.com/watch?v=cTUOhYcw4ZY

-- Easy to use end grain cutting board designer: http://www.1024studios.com/cuttingboard.html

View Jorge G.'s profile

Jorge G.

1526 posts in 1130 days


#8 posted 05-03-2012 02:47 AM

Yeah, he rolled it into the blade moving 1/128 of an inch at a time. lol

Nope, it looks that way because of the high speed photography, in reality he mentioned he moved the finger quite fast, as in “I want to get it over with one way or another”.. :-)

-- To surrender a dream leaves life as it is — and not as it could be.

View Jorge G.'s profile

Jorge G.

1526 posts in 1130 days


#9 posted 05-03-2012 03:07 AM

I did look at the video, as I stated the “slow” motion is an effect of the high speed photography. It looks as if he was moving the finger very slow when in real time it was fast. I don not know how can I explain it any clearer.

Think of the film made of a bullet piercing a balloon, it looks like it is going slow, but in reality you are not even able to see the bullet.

-- To surrender a dream leaves life as it is — and not as it could be.

View Mark Shymanski's profile

Mark Shymanski

5111 posts in 2367 days


#10 posted 05-03-2012 03:11 AM

The fellow stuck his finger into a spinning blade because he believes in his product…and we criticize his ‘style’!

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View Jorge G.'s profile

Jorge G.

1526 posts in 1130 days


#11 posted 05-03-2012 03:27 AM

At 4 minutes into the video they weren’t using the slow motion.

Yeah whatever…..(sigh)

-- To surrender a dream leaves life as it is — and not as it could be.

View Joseph Jossem's profile

Joseph Jossem

384 posts in 923 days


#12 posted 05-03-2012 03:41 AM

If you have insurance only cost a little to put the finger back on hahahahaa

Awesome saw havent used one if the accuracy is in tune with the other cabinet saws in that price range worth it.

View IrreverentJack's profile

IrreverentJack

724 posts in 1498 days


#13 posted 05-03-2012 02:27 PM

I wish the Whirlwind guy the best of luck. I have two questions for you Joe.

1. What do you think this ‘bolt on’ system will cost?

2. What would it be worth to you?

I have a hard time taking it seriously. Comparing Whirlwind to a Saw Stop is like comparing a band-aid to an emergency room visit – only the band-aid will cost about the same. If you close your eyes tight enough, Whirlwind might protect you from being ravaged by the dastardly Steve Gass, but you’ll never have one on your saw. -Jack

View harry1's profile

harry1

512 posts in 940 days


#14 posted 05-04-2012 04:00 AM

I’ve viewed that video several times and am convinced that judging by his approach speed to the saw that part was in real time, which means that just the very tip of his finger approached the blade VERY slowly.

-- Harry, Western Australia

View Jorge G.'s profile

Jorge G.

1526 posts in 1130 days


#15 posted 05-04-2012 05:48 AM

Gass was interviewed and explained why it looked so slow, so unless you are absolutely sure he was lying you are incorrect.

here is the video in real time

http://www.youtube.com/watch?v=OMD3agP5hv0

time 4:20

-- To surrender a dream leaves life as it is — and not as it could be.

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