JonCarter
Well-Known Member
Dschutt, What are the dimensions of the reflector? (Diameter & depth?) What are the dimensions of the two openings? Is it made of pieces of reflective metal riveted to a framework of some kind, or is it reflective (silvered?) glass segments riveted to the frame? Looks like flat pieces of glass in the pic.
RE: the arc mechanism: I'd bet that the arc mechanism was intended to rest at the angle shown in the instrument, (this would face more of the positive crater toward the lens.) The bottom plate (just above the knob) would be fastened to the bottom of the instrument housing and with the knob protruding below the instrument housing, probably through a slot to allow back & forth movement.. The whole arc mechanism appears to be mounted on 'rails' to allow it to be moved toward & away from the optical system. Can you rotate the knob or is it frozen? If it rotates, does it move both carbons toward and away from each other? (JHand-fed arc.) (One LH & one RH thread on the drive shaft, possibly different pitches to feed the positive/upper carbon faster than the negative?) There appears to be something (insulators?) where the arms holding the carbons are attached to the 'drive screw.'
More photos of both, with a scale included, please!!
All in all, very interesting. Ship: right up your alley!
RE: the arc mechanism: I'd bet that the arc mechanism was intended to rest at the angle shown in the instrument, (this would face more of the positive crater toward the lens.) The bottom plate (just above the knob) would be fastened to the bottom of the instrument housing and with the knob protruding below the instrument housing, probably through a slot to allow back & forth movement.. The whole arc mechanism appears to be mounted on 'rails' to allow it to be moved toward & away from the optical system. Can you rotate the knob or is it frozen? If it rotates, does it move both carbons toward and away from each other? (JHand-fed arc.) (One LH & one RH thread on the drive shaft, possibly different pitches to feed the positive/upper carbon faster than the negative?) There appears to be something (insulators?) where the arms holding the carbons are attached to the 'drive screw.'
More photos of both, with a scale included, please!!
All in all, very interesting. Ship: right up your alley!