A Kliegl Bros. 1357 to be exact. Four manufacturer-approved lamps, all 1000w, brightest to dimmest:Came out of an old Kliegl fixture.
These are the big boys in question.Nothing to say other than I would call it mid-century, or first generation halogen lighting fixture. Not old, or perhapls elder in fixture. Looks like an awkward night becasuse it's mostly the same filaments, different bases in advancement of the same working capsule.
Measure it's LCL (the point of contacts) not the ceramic - though either measurement would be a rough gauge for a RSC (R7s-18) lamp.
Do you mean:
1) Kliegl ?1357/6W 6x27° Leko pre-1978: 1Kw DWT/EHS/FER RSC Lamp. Axial Base, Missing Iris Slot noted for 1978 Model, Step Lens. I got one I think in the museum that I am yet to confirm details of what it is. Photo's of the fixture in question etc. would help confirm what I have.
1) Kliegl #1357 6x12 Leko, c. 1975, 1Kw RSC Base, Step Lens, Pattern Slot, 8" Body stepped down to 6" lens, Broom handle Back.
Kliegl and Colortran (until they went to sleep on this concept) did a really good actual drafting instead of computer design (not yet invented) for dual ended halogen/quartz lamp design. They were the ETC of their c.1964 day. Like with the HPL designed arouned the Leko designed, the high technology of RSC 1964 halogen/quartz lamp Leko design was high technology. You really can get a good bench focus out of a RSC lamp in a Leko of that period!
After 1964, Kliegl started lagging behind technology seemingly. Single ended quartz/halogen versions of the lamps came out for Leko's by 1974 for replacement of the incandescent lamp axial Leko design in making the RSC version obsolete or at least equal to them. The late 60's or early 70's, the quartz/halogen upgrade to radial Lekos was invented and made non-halogen fixtures about as useful. It's conversion to a halogen version of a lighting axial fixture was in the cards already, with it's filament in the correct position. Just with the HPL lamp to shorten that filament around 15 years later.
So photo's of what you are putting these lamps into, and more say next to a ruher would be good. There are at lest 3 or four sizes of the RSC lamp. One, the 3.1/8" size used by Colortran for some wash lights is very rare.
Neither of those appear on this list of Kliegl Bros. fixtures.Could also be a DXW or DXN.
The 3.5" 1340 or the 1357? I can't recall ever trying to bench focus either one. Pretty sure a lesson in frustration.Not a useful looking light, and I did not bench focus mine.
Sorry, incorrect. All lamps listed below are still available.Still though. If I'm correct and think I am, It's using a 3.3/4" LL lamp no longer on the market.
Looking into this...
More amazing to me, is how just a little later, some yokels in Utah were able to design and manufacture a parallel, spherical, ellipsoidal reflector. From glass. And axial to boot.A thought though to the designers of this fixture, or more properly to the Colortran and Kliegl c.1964 inventors of the RSC based 3.1/2" Quartz/Halogne Leko. Those of us in advanced drafting must remember back to the class on drafting up a three dimensional "Point Source of a line", and it's drama in figuring that out. Now once hand drafted it, imagine optically placing it within an ellipsodial reflector so as to bench focus. Those were some very skilled drafts people back than.
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