Re: left hand thread light bulbs « Reply #16 on: April 15, 2021, 03:40:53 PM » Author: Rommie
An old thread, but thought I'd revive it, as I just found some LH thread bulbs and the lampholders..! As a hopeless leftie, I love them  See here for a photo
« Last Edit: April 15, 2021, 05:29:23 PM by sox35 »		Logged

Ria (aka Rommie) in Aberdeen
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	Re: left hand thread light bulbs « Reply #17 on: April 17, 2021, 02:02:35 PM » Author: AngryHorse
The only left hand thread I know of here is for truck wheels, the left hand wheels have LH threaded nuts so they don’t come loose on the road, the RH are normal clockwise nuts
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	Re: left hand thread light bulbs « Reply #18 on: April 17, 2021, 02:09:50 PM » Author: Rommie
Quote from: AngryHorse on April 17, 2021, 02:02:35 PM The only left hand thread I know of here is for truck wheels, the left hand wheels have LH threaded nuts so they don’t come loose on the road, the RH are normal clockwise nuts The threads for a lot of things are left handed; the left pedal on bicycles for a start, or it would come off for the same reason as truck wheels. Also the left wheel on a bench grinder, the valve on the acetylene cylinder of an oxy-acetylene torch, probably a few other  things as well, but those are what immediately spring to mind. Oh yes, LPG cylinders I think.
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Ria (aka Rommie) in Aberdeen
Administrator, UK & European time zones. Any questions or problems, please feel free to get in touch

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	Re: left hand thread light bulbs « Reply #19 on: April 18, 2021, 08:26:50 PM » Author: Joe Maurath, Jr.
Back in the 1980s my cousin worked at a large shipbuilding facility near Boston, MA. He said there were strings of festoon-like, incandescent work lights strung all over the place. Of interest, he said all of them had left-hand threaded sockets so the workers would not steal the bulbs  for use at home, etc. Made plenty of sense to me.
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"A secret to happiness is letting every situation be what it is, instead of what you think it should be, and then making the best of it."

Please refer to www.insulators.info where I periodically post many images of lights and insulators in the group's Picture Poster Gallery. Thank you.

	Re: left hand thread light bulbs « Reply #20 on: April 18, 2021, 11:56:05 PM » Author: Bulbman256
Quote from: Joe Maurath, Jr. on April 18, 2021, 08:26:50 PM Back in the 1980s my cousin worked at a large shipbuilding facility near Boston, MA. He said there were strings of festoon-like, incandescent work lights strung all over the place. Of interest, he said all of them had left-hand threaded sockets so the workers would not steal the bulbs  for use at home, etc. Made plenty of sense to me.  But then a light bulb enthusiast might come along and permanently borrow one because they have that kind of lampholder.
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Collecting light bulbs since 2012, a madman since birth.

	Re: left hand thread light bulbs « Reply #21 on: April 19, 2021, 06:50:29 AM » Author: Rommie
Quote from: Bulbman256 on April 18, 2021, 11:56:05 PM But then a light bulb enthusiast might come along and permanently borrow one because they have that kind of lampholder. That's entirely possible, although we would never do such a thing, of course
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Ria (aka Rommie) in Aberdeen
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	Re: left hand thread light bulbs « Reply #22 on: April 19, 2021, 10:20:55 AM » Author: Bulbman256
Quote from: sox35 on April 19, 2021, 06:50:29 AM That's entirely possible, although we would never do such a thing, of course  Never!
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Collecting light bulbs since 2012, a madman since birth.

	Re: left hand thread light bulbs « Reply #23 on: April 19, 2021, 08:00:20 PM » Author: Joe Maurath, Jr.
Quote from: Bulbman256 on April 18, 2021, 11:56:05 PM But then a light bulb enthusiast might come along and permanently borrow one because they have that kind of lampholder. Come to think about this again... those left-hand thread lamps might have been 240V or 277V since they were in an enormous ship building yard. It is common to operate area lighting at higher voltages here in the U.S. in industrial environments. My cousin said that they were usually 100W but did not know what voltage they ran at. If they were the higher voltage type as I suspect, then that probably disappointed bulb-snatchers when they got home even if they had a matching socket.
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"A secret to happiness is letting every situation be what it is, instead of what you think it should be, and then making the best of it."

Please refer to www.insulators.info where I periodically post many images of lights and insulators in the group's Picture Poster Gallery. Thank you.

	Re: left hand thread light bulbs « Reply #24 on: April 19, 2021, 08:04:26 PM » Author: Rommie
Interesting, here it's the other way around, certainly on construction sites, I suspect permanent industrial installations are 240V like everything else. Most if not all construction sites here require power tools and on-site lighting to be powered from 240V-110V step-down transformers with the secondary centre-tapped to earth so the maximum voltage to ground is 55V. We have a small 3.3kVA portable one which we use for our power tools and sometimes our 110-120V lamps.
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Ria (aka Rommie) in Aberdeen
Administrator, UK & European time zones. Any questions or problems, please feel free to get in touch

"What greater gift than the love of a cat..?" - Charles Dickens
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	Re: left hand thread light bulbs « Reply #25 on: April 19, 2021, 08:11:53 PM » Author: Joe Maurath, Jr.
Quote from: sox35 on April 19, 2021, 08:04:26 PM Interesting, here it's the other way around. Most if not all construction sites require power tools and on-site lighting to be powered from 240V-110V step-down transformers with the secondary centre-tapped to earth so the maximum voltage to ground is 55V. We have a small 3.3kVA portable one which we use for our power tools and sometimes our 110-120V lamps. I am sure there were step-down to 120V transformers and outlets around where he worked for whatever purposes (he was a welder). The majority of all of the other tools around the shipyard were hydraulic operating from the higher-voltage feed; others such as cutting torches and welding equipment was from gas.
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"A secret to happiness is letting every situation be what it is, instead of what you think it should be, and then making the best of it."

Please refer to www.insulators.info where I periodically post many images of lights and insulators in the group's Picture Poster Gallery. Thank you.

	Re: left hand thread light bulbs « Reply #26 on: April 20, 2021, 08:36:51 PM » Author: Rommie
I found some more LH thread bulbs, sadly made in China, but they seem to have an E27 cap rather than E26. They're the same length, anyway. If anyone wants any, I had to buy a pack of 12, I only really wanted three or four..!
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Ria (aka Rommie) in Aberdeen
Administrator, UK & European time zones. Any questions or problems, please feel free to get in touch

"What greater gift than the love of a cat..?" - Charles Dickens
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