Wooferhound
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Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 27, 2018 12:26:40 GMT -5
Jamesp has been inspiring me to tumble more glass because of the great results he is getting by tumbling art glass. So I have been on the lookout for glass that is thick enough to work with. I was cleaning out the basement under the stage in the 2000 seat theater that I work at, when I noticed the large pile of Obsolete and Broken lighting fixtures in the corner destined for the dumpster. Suddenly I realized how much glass that is available from the lenses of those lights. So I started taking apart the lens tubes and harvesting some thick glass. Some of them are Fresnel lenses that have thick sawtooth ridges molded in circles around the lens and some are parabolic shaped. A short time later I noticed a large pile of roundels which are disks of colored glass used to color the lights in lighting strips over the stage. These were stacked up just for the taking. The lighting fixtures these belong to were thrown in a dumpster during a remodel we did 6 years ago. They are Red, Blue, Green and Yellow. Some are totally smooth and shiny and some have lines or bumps on the surface that control how the light spreads out. These are 7 3/16 inch diameter and slightly less than 1/4 inch thick judging by this one which was broken when I found it. Just got these home at midnight and just now making plans on what I am going to do with this stuff. Any Ideas ?
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unclesoska
freely admits to licking rocks
All those jade boulders tossed in search of gold!
Member since February 2011
Posts: 934
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Post by unclesoska on Jan 27, 2018 13:14:12 GMT -5
Cut it up and tumble it. Perhaps cutting pendant size pieces. Drill hole for attaching cord.
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Deleted
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Member since January 1970
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Post by Deleted on Jan 27, 2018 18:11:33 GMT -5
Woot!
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Post by toiv0 on Jan 27, 2018 18:52:46 GMT -5
big ole petri dishes....set up some cultures I will watch this thread
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 28, 2018 0:14:33 GMT -5
Working another day running Spotlight for The Sound Of Music. These are the same type of glass used in traffic and railroad signals. Did some more cleaning out in the basement today and found about 200 of these in all I have a 4 color set picked out for Jamesp, waiting here at the house, the smooth ones. Anybody else want any ?
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jamesp
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Member since October 2012
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Post by jamesp on Jan 28, 2018 6:36:14 GMT -5
Wife was at a antique shop in N Jersey and called asking if I wanted traffic light lenses last weekend woofer She bought a set, red yellow green, about 11 inches across. They may be old. Betcha $100 yours are made out of pyrex since wattage is high(spot light HAS to be hot as hell) and rain hits the lenses. 200 of them !!!
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jamesp
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Member since October 2012
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Post by jamesp on Jan 28, 2018 7:10:18 GMT -5
They are likely made of the finest glass. Optical light filters and colored lenses are often colored with exotic metals like gold(red) and silver(amber) They probably cost a fortune. Glass varies a lot in hardness. I get various polish quality in a load of mixed glass. Softest at 363, hardest at 657 Knoop hardness scale almost half as hard. I probably tumble soda glass for the most part. Middle of road at 465 Knoop. Bottle glass can be darn hard, tempered table top glass real soft. You can tell when coarse grinding, some rounds much quicker. No idea what the harder glass-ceramic is. Lenses for cameras are made of borosilicate glass, some glass artist use borosilicate. It is soft, I think it is used because the bubbles rise out of it easily. When you coarse grind your lenses you should throw some bottle glass and other type glass in with the load and watch which round fastest. Small pieces of glass bruise less than big chunks of glass....
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Post by MrP on Jan 28, 2018 9:08:39 GMT -5
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Wooferhound
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Lortone QT66 and 3A
Member since December 2016
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Post by Wooferhound on Jan 28, 2018 10:48:09 GMT -5
These colored lenses are imprinted with the words KOPP GLASS According to their website . . . ----------------------------------- Borosilicate glass is a strong and durable material that is well suited for harsh environments. Long exposure to ultraviolet light, chemicals, salt, and other abrasive materials has little to no effect on it. ----------------------------------- www.koppglass.com/about/added ... You are correct Wikipedia says it is Pyrex en.wikipedia.org/wiki/Borosilicate_glassSo Now . . . the lingering question ... Will It Tumble ?
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on Jan 28, 2018 12:14:10 GMT -5
These colored lenses are imprinted with the words KOPP GLASS According to their website . . . ----------------------------------- Borosilicate glass is a strong and durable material that is well suited for harsh environments. Long exposure to ultraviolet light, chemicals, salt, and other abrasive materials has little to no effect on it. ----------------------------------- www.koppglass.com/about/added ... You are correct Wikipedia says it is Pyrex en.wikipedia.org/wiki/Borosilicate_glassSo Now . . . the lingering question ... Will It Tumble ? Off course it will tumble. With the same PIA frost and bruise issues all glass is famous for. The curse of glass. Again, betcha it is some expensive high quality glass. Kopp a high tech operation. Can't find this info. a professor at engineering school said that glass is one of the strongest materials known in resisting slow bending of all materials IF IT IS NOT scratched. As soon as you drag a glass cutter across it it reduces its strength like 1000's of times. Polished glass with no scratches is freaking strong in resisting bending forces. Glass is a weird substance. Got the funky properties. ETA Bending force would be like parking a car on the end of a diving board
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peachfront
fully equipped rock polisher
Stones have begun to speak, because an ear is there to hear them.
Member since August 2010
Posts: 1,745
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Post by peachfront on Jan 28, 2018 18:53:40 GMT -5
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Wooferhound
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Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 29, 2018 2:10:54 GMT -5
Not wanting to make money but trying not to lose any. I messaged both of you and talked to MrP on the phone minutes before spotlighting another performance of Sound of Music.
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Wooferhound
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Lortone QT66 and 3A
Member since December 2016
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Post by Wooferhound on Jan 29, 2018 3:48:41 GMT -5
While we are here let me teach you how to run a spotlight and show you my Main Job at the Von Braun Center in Huntsville Alabama, a large complex with Ice Hockey, 2000 Concert Hall, 360 seat theater and about 10 Exhibit/Dinner spaces. Last week we did 5 sold out performances of The Sound of Music, 2 hour 45 minutes with intermission in the Concert Hall. Barely enough time to log onto the forum. I was operating a spotlight and doing equipment maintenance before the show. Here are some pictures I made on the 4th show. Here is the spotlight I was operating. it is about 7 feet long and 150 pounds without the base. It is a 2000 watt high pressure xenon bulb in there and makes the color of Sunlight. In this picture the spotlight is reversed 180 degrees from normal so I could get good lighting. Here it is positioned normally, all the way back and at the top of the balcony, in a small booth all to myself. There are 2 more booths like it so there are 3 spotlights total. I sit in the stool very close to the light because I need to see through the Telrad (spotsight) so I can be aligned to the target before bring up my intensity. I wear the headset and communicate to a person that tours with the show and gives me detailed instructions about the Target, Intensity, Fade Time, Color and Size. I like to have handy snacks for my short breaks where intensity is Zero. During the show all lights are off except the stage. This is what I see in the Telrad, it is a small Heads-Up display so I can precisely line up on the target before fading the light on. Here are all the controls... Far Right top- Telrad Bottom black handle- controls max beam size, used to make wide flood lighting Six levers- the six available colors. Different colors for each show, can be usd in combination, not glass but an Acetate Top left three levers- most used, Iris or beam size, Intensity or brightness, Chopper cuts of the top an bottom of the beam Big Knob on Bottom- Focus or sharpness Bottom left- Tilt resistance, under that is Pan resistance, better seen in other pictures I Aim the light by holding onto the U shaped bracket at the very front of the fixture. At the front I have a lot of leverage and fine control. I have a piece of my polished Quartz taped onto the spot where I grip the bracket because I've heard that quartz has a calming energy and I need all the help I can get because in Broadway a mistake is a Big Deal So now you are ready to do spotlight for the next show
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jamesp
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Member since October 2012
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Post by jamesp on Jan 29, 2018 6:50:10 GMT -5
An art form, often wondered about the behind the scenes light job. In theater the light man has a lot of responsibility. Quite a light canon you man woofer.
I'll run the wires and build your stage but do not give me real time charge, too much pressure.
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jamesp
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Member since October 2012
Posts: 36,154
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Post by jamesp on Jan 29, 2018 7:38:34 GMT -5
Last weekend wife called from New Jersey antique shop asking how many of theses to purchase for tumbling. You carrin on w/my wife woofer ? Betcha Koppglass made this for Winko 12 inches Note that there is a 'top' for reflective angle orientation Looks like the prisms are at about 20 degrees to horizon to bend light to on coming traffic. Vintage era trademark expired 1994
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 29, 2018 15:13:45 GMT -5
Sunday is normally cleanout day but 4000 people needed me that day so cleanouts occured a day late today. Abandoned the rocks that were rolling and decided to roll the 4 colors of theater glass that are now available. Placed the Roundels in a One Gallon freezer bag and hammers a chisle at them trying to make 1 or 2 inch pieces. They filled a 6 pound barrel really good so it's all running. Used raw Ungraded SiC and some slurry thickiner. Also busted up a clear parabolic fresnel lens but there was not enough room to add it this time.
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Tommy
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Post by Tommy on Jan 30, 2018 0:06:18 GMT -5
Thanks for the peek behind the curtain Woof. I've always wondered about it too - are you working off any kind of a script or does the show guy feed you cues the whole time?
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Post by Pat on Jan 30, 2018 0:16:38 GMT -5
Hmmm, those colors would make pretty cabs. I’m thinking earrings.
Is it safe to say if something can be tumbled, it can be cabbed?
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jamesp
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Member since October 2012
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Post by jamesp on Jan 30, 2018 8:00:14 GMT -5
Ha woofer, tumbling glass in the rotary is el cheapo tumble. Use your clean out pan to catch and re-use the SiC. The glass hardly breaks the SiC. I do crush the bulk down to about 30 to 80 grit size. Throw your little trash pieces of glass in with the rest too, makes cool polished frit pieces.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Jan 30, 2018 11:36:56 GMT -5
Thanks for the peek behind the curtain Woof. I've always wondered about it too - are you working off any kind of a script or does the show guy feed you cues the whole time? Usually the person that Calls the ques, travels with the show and also operates one of the spotlights at the same time. They execute the ques that are the most important or complicated while calling out ques for the other spots. We have a meeting before the first show to talk about the hardest ques and the style that they use to call out the ques. Spots have a number, colors have a Frame number, Targets have a name or stage position or a description of the clothing. During the first performance the ques can be very detailed, after we do it once it is much easier and less difficult as each show goes by. All the instructions are given to all the spots and then executed an a GO call. During times when spotlights aren't needed, we tell jokes and make fun of the show.
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