I have an early Mk I Ross issued to the Militia in 1907. I believe the rear sight is called a Ross, Sight Mk II. It utilizes a knurled ring to move two flar fingers that are notched for the sliding ramp base. I took it apart to clean it, and found I did not pay enough attention to where the spring sits in the assembly. Can anyone help?
Ross rear sight spring installation question
- Thread starter dpcjradio
- Start date
PerversPépère
CGN Ultra frequent flyer
- Location
- Shawinigan (Quebec)
Sight
Can the sight elevation arm be lifted from the slider?
Is that spring a flat leaf?
If so, the spring tension must act to return the arm against the slider's bosses; this can give you an indication of the needed position of that spring.
Another option is the spring acting directly against the end of the mobile arm to cam it down or keep it in the upright position when the arm is lifted completely at the vertical by pushing on a flat surface at the arm's end.
If the elevation arm is captive within the slider, the spring tension could be reversed to give an upward tension on the elevator arm but I don't see why they would choose that option.
Now, can you take close-up pics of each part and relative position of each one?
A good pic of the underside of the elevator and another one or two of the sight base without the elevator would be helpful.
PP.
Can the sight elevation arm be lifted from the slider?
Is that spring a flat leaf?
If so, the spring tension must act to return the arm against the slider's bosses; this can give you an indication of the needed position of that spring.
Another option is the spring acting directly against the end of the mobile arm to cam it down or keep it in the upright position when the arm is lifted completely at the vertical by pushing on a flat surface at the arm's end.
If the elevation arm is captive within the slider, the spring tension could be reversed to give an upward tension on the elevator arm but I don't see why they would choose that option.
Now, can you take close-up pics of each part and relative position of each one?
A good pic of the underside of the elevator and another one or two of the sight base without the elevator would be helpful.
PP.
PerversPépère
CGN Ultra frequent flyer
- Location
- Shawinigan (Quebec)
Could it have something to do with the two pushbuttons in the slider?
PP.
PP.
response to ideas
Yes, the spring must keep outward tension on the slide locking bars somehow. I did not drive out the pin at the base of the arm, so no, it was not placed there. I have looked for, and found no telltale wear marks that would indicate spring placement. I too wondered about the finger on the spring engaing in the small triagular cut outs on the locking fingers. The problem is the fingers are way too long to sit within the slide. And why so complex a shape to accomplish this, it does not make sense.
Yes, the spring must keep outward tension on the slide locking bars somehow. I did not drive out the pin at the base of the arm, so no, it was not placed there. I have looked for, and found no telltale wear marks that would indicate spring placement. I too wondered about the finger on the spring engaing in the small triagular cut outs on the locking fingers. The problem is the fingers are way too long to sit within the slide. And why so complex a shape to accomplish this, it does not make sense.
- Location
- Atascadero, California USA
There are a few things about Ross rifles that even in the context of their day don't make sense. The rifle reflects more Sir Charles'ideas of what was right and wrong than military or governmental requirements. Some of his ideas fly in the face of then accepted military convention. Not necessarily a bad thing but not designed to win friends in military circles. Naturally my comments won't help you with your problem. I do know you have a very early sight system on your rifle. Is the rifle complete? Best regards, Joe
Both Pervers Pepere and green sugested the spring fit at the base of the elevator arm. I thought this was impossible, as I had not driven out the pin. I was wrong, this is the correct location. The sight must have been previously assembled with spring incorrectly installed. My only remaining question is what sort of spring am I missing for the the slide locking arms?
PerversPépère
CGN Ultra frequent flyer
- Location
- Shawinigan (Quebec)
Probably a small hairpin spring with a 90 degree bend at the end of the arms to engage the cutouts.dpcjradio said:
PP.
