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LightBulbFun last won the day on May 16 2019

LightBulbFun had the most liked content!


About LightBulbFun


  • Rank: Invacar Model 70

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    LightBulbs, Computers, Buses, Cars, the older the better :)


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    United Kingdom

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  1. @clayts450 is in that area I think, perhaps you can work something out with him so he can take it with him in the van next courier run or something such
  2. oh yes I know what they are I was just verifying that it was that was the type of lamp you where referencing when you said 110V lamps 5 in a string does anyone still make dedicated traction lamps still or do museums etc just use regular 110V lamps these days I wonder but the one thing I was wondering about the traction lamps is what did they do for arc suppression, even on 240V an incandescent lamp can and does arc over at end of life its why they go PINK or BANG when they burn out see an electric arc (as you probably know) is a negative resistance thing, so the more power goes into it the more its resistance drops which allows more power to flow etc etc until something blows up (this is why discharge lamps have ballasts you need something to regulate that current flow) so mains voltage lightbulbs (good ones anyway) have built in fusing that blows when arcing happens but on something like a series string found in a trolley bus, this method of arc prevention does not work as the other lamps in the string will act as a ballast limiting current flow so no fuse can do its job, and as such an arc can burn away until total destruction happens, heres a fun video demonstrating that so in lamps used in such series strings (be it Traction lamps or 6.6A US Series street-lighting lamps etc) some alternative method of arc quenching is usually used, (normally something that just shorts the lamp should it go open circuit or an arc form) and so im curious on these series strung traction lamps what that might be (especially as it does say they are gas filled and are not vacuum lamps) hah thats quite amusing, a fun mental picture of some 12 year old running across a busy london street dodging road traffic franticly switching frogs about to keep the trolley buses moving which amusingly is quite similar to the video game Frogger LOL no no please do continue when you want to, I very much enjoy the stories and info Trolley buses are one of those things I find quite mysterious almost, because even Old motor buses you can still go and see them in action etc and bus rallies etc or randomly driving about as their owners take em out for a spin but you just cant do that with a Trolley bus of course, they are outside of a few special locations, forever barred from the road! which is quite sad tbh
  3. interesting I always assumed, the lamp was for something on the trolley bus itself but you are right it could be something to do with their infrastructure as well (I know of a few odd ball London Transport specials there as well like the Dual filament 100V lamp used in London underground signalling) ooh interesting! thank you for the info (im guessing then if LT Trolleys used a standard 24V lighting circuit then they also used the standard LT issue 24V 22W lamp, I wonder in general when that lamp first came to be...) the 5 110V bulbs you talk about, they are not the traction lamps I mentioned above are they? as the lamps themselves where often of about 110V although nominally rated by the burning current rather then voltage (because its a series string) I do wonder what they did on the gas filled ones to prevent internal arcing at end of life on the 600V supply if there was no shunt device later at some between 1938 and 1951, Osram GEC did introduce a Lower voltage higher current traction lamp that did have an internal shunt always found it interesting that these Low voltage ones where Edison screw only, given the high vibration setting they where to be used in id of expected them to use a bayonet base
  4. I love the period 1970's-1980's pressed metal plates on that you really dont often see vintage retro-reflective on something that old with a non suffix mark and I love it (but you just know they will probably be the first thing to get binned off when it gets restored/recommissioned)
  5. and then theres this thing which I have been able to find 0 info on which may just have run on 600V being a discharge lamp, I swear I recall finding it in an Osram GEC catalog somewhere but I just checked a few from the 1930s, 50's and 60's and was not able to find it there, what is it to be indicating for exactly I wonder... Osglim was the Brand name GEC used on its negative glow neon lamps back when it was restricted to only being able to use its Osram band name on tungsten filement lamps and also why its carbon filament lamps where branded Robertson, but I digress I did however find this in the 1938 catalog, which might give us some clues as to the mystery of the trolley bus bulbs catalogs from the 50's and 60's do list trolly bus lamps, but the big difference is the interior lamps where all listed as having 38Mm diamiter bulbs but all the London Transport trolleys iv "seen" have used 50Mm bulbs (again same as the RM/RT, etc) so perhaps they used a development of the 1938 version? heres the same section from the 1960 catalog, note no 50Mm bulbs but I would not be surprised at all if London Transport had some sort of bespoke Light Bulb made, the interior Light bulbs used in RTs and RM's for example is a bespoke type for London Transport I have not been able to find in any period catalog (22W 24V 50Mm diameter bulb)
  6. loving the details/stories about Trolly buses (it always amazes me just how much electricity, electric vehicles draw, take the figures above, 550V times by 620A thats 341,000 watts!! and thats for a single machine!) they are something id love to experience some day, they combine my interests of things electric and Old London buses, yet I know so relatively little about them, and have never been on one, someday hopefully ill catch a ride on one somewhere I mean im still trying to figure out what the saloon lighting in London Trolly buses was see there existed dedicated traction lightbulbs (usually wired in series sets and involving some automatic shunting device in the lamp or socket for when one fails) but these lightbulbs (unless you knew what you where looking at) looked like your regular pear shaped GLS lightbulb (or squirrel cage lamp if we are talking about a 1920's tram or such) but from what iv seen inside London Trolly buses, they looked to use golf ball shaped lamps like what they did on on RTs, RM's and the such like so im really curious to know what are those lamps are they your standard issue London Transport 22W 24V lamp (but if so where did the 24V supply come from or where they still wired in series?) or where they something else that I dont yet know about?
  7. Sorry to hear things have not gone to plan on the life side of things, but I hope things improve there and you do not have to end up selling the SJ! (im pleased to see you where able to get the V5 in the end )
  8. well, @busmansholiday or maybe it was @Inspector Morose, can correct me if im wrong but I recall at least one enthusiast got round that probably by simply towing along a suitably sized diesel generator id love to know the details of that!, i mean for starters, how big is the Motor (or Motors id presume) in a Trolly bus how much power do they require... IIRC they ran on 600V DC (thank you traction lightbulbs for that information) but i dont have any info on their average current draw, these days I wonder if you could strap some solar panels to the roof and just tow a trailer full of Tesla car battery packs or such, wonder what sort of range that would get you (or even sling the battery packs underneath the trolly bus, DIY electric bus? bonus points if you drive it all the way home from spain)
  9. make NOVA declaration, get a dating certificate from someone on the V765/1 list, fill in a V55/5 plus monetary cheque (how very french) post everything to the DVLA and job jobbed
  10. ooh cool! id love to go, but I dont really trust myself on regular/modern public transport but who knows if I get REV back by then I might be able to make it (id like to have REV home on or before the 5th of November as that will be her 45th Birthday and id like to have her home for that , but im not in much control of her arrival date, so I cant guarantee that sadly) I very much appreciate the heads up regardless if you go to the actual pay charges page, it will show historic vehicles as exempt its just the main checker that for whatever reason has always and still thinks historic vehicles need to pay a ULEZ charge, shitty/confusing web design FTW I think because the main ULEZ checker, only checks if a vehicle is ULEZ Compliant, but not if its ULEZ exempt if that makes sense (a historic vehicle is ULEZ exempt but not ULEZ compliant, well unless its an Electric Tippen Delta, London Trolly bus or Enfield 8000 LOL)
  11. and, am I the part of his imagination where someone publicly hates something but privately loves it? like all those public anti-homosexuals who all secretly have a boyfriend somewhere... we all know @Six-cylinder dislikes Invacars, yet here they are everywhere clearly running rampant in his imagination!
  12. actually looking at that list again I see mention of a Group C licence for Tricycles Less then 410Kg, which I think might be the licence that Model 70's users got, certainly I recall Stuart talking about said Ministry users getting a Class C licence, I was not able to find much on that at the time but seeing that list makes more sense now and that fits the legal definition of most ministry invalid vehicles nicely (remember an Invalid carriage is only legally such if it weighs 254Kg or less hence why the V5 of any sort of vehicle purposefully built for use by the disable says "INVALID VEHICLE" rather then "INVALID CARRIAGE") although it does leave later Model 70's out in the cold (Mark A and Mark B Model 70's to March 1976 where 410Kg on their V5 which legally makes them a Motor Cycle/Tricycle same as a Reliant Robin or such, but Model 70s from March 1976 onwards where normally down as 413/414kg on their V5 which legally makes them a motor car, same as a Mini Or Morris minor etc) but I dont think the Ministry ever actually did anything on that, they just quietly or unknowingly flouted the rules Certainly Marion Webb still had to pass a full car driving test to get a Motability car when She gave up TJN352R despite that Model 70 being of the later type so weighing 413Kg and thus legally being a Motor car rather then Motor Tricycle unless of course there was still a dedicated invalid vehicle licence that covered Invalid vehicles of all weights and legal definitions
  13. thats impressive although I will say on point 7, you did need and did get a licence to drive a Model 70, or any sort of invalid vehicle/carriage, back in the in the day you could/did even run around on L plates for a while with a provisional licence and got driving lessons with an instructor crammed inside with you (at least by the time of the Model 70 thats how it worked, I dont see how you could have an instructor with you on a Stanley Argson! but I think back in the Argson days you just had to show you could drive round the hospital car park and they would give you a licence! although I do have period pictures of Stanley Argsons on L plates so perhaps it was a bit more involved then that even back in the 50s!) I sadly have never been able to quite figure what exactly that licence was however, I know there was the Category J invalid carriage licence but I dont know what definition of invalid carriage that applied to, did it apply to all invalid vehicles, or did it apply only to literal invalid carriages (ie an invalid vehicle bellow 254Kg) or did was it only to Mobility scooters (bellow 150Kg) https://www.gov.uk/old-driving-licence-categories its listed here as just for mobility scooters, but given the time period it was issued 1976 to 1986 I suspect its true meaning may have been lost to time as I could see someone reading "invalid carriage" and just assuming that means Mobility scooter, but it is worth noting the legal definition of a Mobility scooter (which where and still are called an Invalid carriage confusingly!) Came into act in 1970 so perhaps they did have their own licence category before they where allowed to be driven with no licence as they are today but its modern definition of "B1 Invalid carriages only" fits in much more with an actual 254Kg Invalid carriage or 255Kg+ Invalid vehicle, because B1 is for small cars/goods vehicles bellow 450Kg/550Kg and on the last bit, although I hope I never actually find out, from what I have read of period user accounts, Model 70's do not bob on water sadly! (that Model 70 did survive but was scrapped and replaced in the mid 1980's due to Chassis corrosion issues, no surprises as to what may have been the cause of that!) although to be fair that was more a stream/shallow river he was trying to cross, so perhaps they need a deeper body of water before they start to float, but again one of those things im not planning on finding out! LOL and here all I was just going to post this picture and suggest it may be why @Six-cylinder does not RTFM!
  14. nothing an Elgato or something such cant solve (as they work at a hardware rather then software level)
  15. Ooh thats cool! I dont think iv seen many British built vehicles with a Detroit 2 stroke fitted, needs video of it running and driving I feel given the engine fitted I should Tag @Zelandeth and with that tilt and slide bed its just the thing for transporting the Sinclair C5 of course...
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