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Topic: Worst shock you have given?

Freddie Dobbs
Expert Film Handler

Posts: 115
From: Pinson, AL, USA
Registered: Jun 2001

posted 10-04-2001 07:50 AM

Will's post about the toilet seat got me thinking, Whats the worst shock you have given someone? I am not proud to say that I hooked a plug wire to a bike that did not have grips on it, talked my little brother into holding the handle bars then pulled the cord...

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Rick Long
Jedi Master Film Handler

Posts: 759
From: Toronto, Ontario, Canada
Registered: Nov 1999

posted 10-05-2001 12:07 AM

Gord McLeod and I have previously discussed, on the forum, various tortures we like to inflict on apprentice projectionists.

One of the nastiest tortures we both enjoyed was in telling a newbie that the static discharge he got while inspecting film on the rewind could be cured by clamping an alligator lead with one end to the grounded rewind table, and the other end to the metal tag on his fly.

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 10-05-2001 08:27 AM

Rick Long said: "...the static discharge he got while inspecting film on the rewind could be cured...".

Hopefully getting shocks while rewinding film is now a rare occurance, since Kodak VISION Color Print Film has a transparent conductive backing layer to help dissipate any static charge buildup. Fewer shocks, and prints stay cleaner.
http://www.kodak.com/US/en/motion/products/lab/2383.shtml

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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Jerry Chase
Phenomenal Film Handler

Posts: 1068
From: Margate, FL, USA
Registered: Nov 2000

posted 10-05-2001 01:03 PM

Since Kodak VISION Color Print Film has a transparent conductive backing layer, can we use the film as wiring? What happens when a strip of film drops across a couple of unprotected leads? Will interweaving two reels of the film make a big capacitor? Is there a standard resistance per foot of film, so that custom resistors could be made out of trailers? Inquiring minds want to know.

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 10-05-2001 01:15 PM

The resistivity is on the order of about 10**9 ohms per square (a measure of internal resistance). Won't carry much current at the lower voltages used for power, but very effective in dissipating thousands of volts of static charge.

An equivalent application is the conductive plastic bags used to shield sensitive packaged circuit boards from static.

Try this test: rub a piece of processed KODAK VISION Color Print film through a dry cloth and try to pick up some cigarette ashes with the static charge. Now try it with an older print, or with "no name" print stock sometimes used for ads. The difference in dirt attraction is quite remarkable.

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Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 10-06-2001 12:14 AM

So, then, could we use a loop of cheap, "no name" film from an old trailer as the friction band in a Van de Graff generator?

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JC Cowles
Film Handler

Posts: 77
From: St. Paul, MN
Registered: Jun 2001

posted 10-06-2001 04:24 AM

The worst shock I've ever received is by grabbig a toaster by the slots. But I saw a 350 pound woman touch a 220volt bare wire and knock a hole in a walkin freezer.

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Freddie Dobbs
Expert Film Handler

Posts: 115
From: Pinson, AL, USA
Registered: Jun 2001

posted 10-06-2001 09:15 AM

Hey, we have found an alternative power sourse.. old prints......

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 10-06-2001 10:11 AM

>>" Try this test: rub a piece of processed KODAK VISION Color Print film through a dry cloth and try to pick up some cigarette ashes with the static charge."<<

Now wait a minute John....just where does one get this cigarette ash?

Steve

Old projectionists never die, they just pick up cigarette ash!

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 10-06-2001 07:43 PM

Steve, thanks for reminding me there are no cigarette ashes in a well-run projection room!

So take the strips of film outside to run the experiment. If you don't smoke, use fresh coffee grounds or shredded styrofoam as "dirt".

Randy: Yes, non-conductive film will make an excellent belt for a VDG generator.

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 10-07-2001 02:41 AM

But John....

I don't smoke (except out my ears) and I don't drink coffee! So now what? This is starting to get complicated!

Steve

------------------
"Old projectionists never die, they just changeover!"

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Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 10-07-2001 09:24 AM

Lycopodium powder?

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 10-08-2001 11:30 AM

Steve --- tear open a full vacuum cleaner bag to get "dirt" for your static experiment (outside of the projection room please!)

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 10-08-2001 01:49 PM

Something tells me Steve does not have carpet in his booth, and as such will not have a vacuum cleaner bag.

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Will Kutler
Phenomenal Film Handler

Posts: 1506
From: Tucson, AZ, USA
Registered: Feb 2001

posted 10-08-2001 03:59 PM

Tellin' a hair raising story to a bald headded man!

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