Hot dog! My buddies from podcast 092 are sponsors!
pantry paratus


Permies likes alternative energy and the farmer likes re-usable incandescent lights permies
  Search | Permaculture Wiki | Recent Topics | Flagged Topics | Hot Topics | Zero Replies | World Domination!
Register / Login
permies » forums » energy » alternative energy
Bookmark "re-usable incandescent lights" Watch "re-usable incandescent lights" New topic
Author

re-usable incandescent lights

paul wheaton
steward

Joined: Apr 01, 2005
Posts: 14842
Location: missoula, montana (zone 4)
    ∞
A friend of mine told me about how boats long ago used incandescent bulbs that were re-usable. The bulbs all had a way of opening them up and replacing the filament. And the boats carried a light bulb repair kit, complete with a bunch of filaments. Imagine: a light bulb that lasts forever. You just have to mend it with a bit of filament every couple of years. Maybe filaments come in 100 packs for $5.

Anybody know of anything like that existing today?  Anybody know of a web page that talks about the old stuff?


sign up for my daily-ish email / rocket mass heater 4-DVD set / permaculture playing cards
                            


Joined: Nov 13, 2010
Posts: 29
i would imagine the filament is the most expensive part
                                


Joined: Feb 22, 2010
Posts: 25
i wonder how they pulled the vacuum needed ?
tel jetson
steward

Joined: May 17, 2007
Posts: 3080
Location: woodland, washington
    
  52
joan from zone 6 wrote:
i wonder how they pulled the vacuum needed ?


I think incandescent bulbs are filled with inert gas.  maybe there's a vacuum, too.  some high intensity discharge lamps involve vacuums.  maybe I have no idea what I'm talking about.


find religion! church
kiva! hyvä! iloinen! pikkumaatila
get stung! beehives
be hospitable! host-a-hive
be antisocial! facespace
                    


Joined: Oct 23, 2011
Posts: 0
The earliest bulbs used a vacuum. Early in the 1900's someone discovered that using an inert gas made the lamp brighter and reduced darkening of the inside of the glass.

Because of the need for either a vacuum or insert gas or at least the absence of oxygen I have trouble understanding why a rebuildable light bulb would have ever been developed or made practical. If there really was such a thing it would be very interesting to see an example and the rebuild kit.
kent smith


Joined: Sep 05, 2010
Posts: 211
Location: Pennsylvania
just a wild guess, but were they carbon arc lights?
kent


Kent
                    


Joined: Oct 23, 2011
Posts: 0
machinemaker wrote:
just a wild guess, but were they carbon arc lights?
kent


There ya' go, but a totally different thing. Never thought of those, Thanks kent
 
 
subject: re-usable incandescent lights
 
Similar Threads
CFL brightness and longevity claims
Why Paul Wheaton is Wrong About CFLs
heat by-product of incandescent bulbs?
Forget those mercury-ridden CFLs, they've solved the LED problem.
ban on incandescent light bulbs
cast iron skillet 49er

more from paul wheaton's glorious empire of web junk: cast iron skillet diatomaceous earth sepp holzer raised garden beds raising chickens lawn care flea control missoula electric heaters permaculture videos permaculture books