Harold Robbins Lock

[fdf]

I recently bought a 36 Cal Rifle with Harold Robbins lock.

Normally  on rifles you have to cock the hammer fully, set the set trigger and then pull the trigger.  This rifle you pull the hammer to half cock, set the set trigger and then go to full cock.

Can anyone shed some insight into Robbins locks and their worth or quality?

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[B Shipman]

What you're describing has to do with the relationship of the triggers to the sear not the lock alone. Robbins locks were of excellent quality. The only problem is that they are long gone and any repairs if ever needed will likely have to be hand made. I sold one a couple of years ago for that purpose.

[Mark Elliott]

What happens if you try to set the trigger at full cock?  If it trips the lock as I suspect, that probably means that the triggers were put in too deep.   I have done that once or twice, and you would be amazed how much difference a couple little pieces of card stock makes.     

[Don Getz]

Many people don't fully understand how a double set trigger works, in ralation to the lock.   When the set trigger is in a
relaxed, or fired position, the rear bar of the trigger is in an upward position, sometimes coming in contact with the sear
of the lock.   This can interfere with the sear going into the full cock notch.   When installing a double set trigger, it requires a lot of thought and calculation, and many times requires grinding down the rear bar of the trigger to give the
sear room to move.   The double set trigger is meant to "slap" the sear bar, not push on it.    This is also one of the biggest problems with a single set trigger.   In most cases, a single set really sticks up high when in a relaxed position.
I only know of one acceptable single set trigger, that is one done by Walter Kain, which works somewhat like a double set
..........Don

[Dphariss]

I recently bought a 36 Cal Rifle with Harold Robbins lock.

Normally  on rifles you have to cock the hammer fully, set the set trigger and then pull the trigger.  This rifle you pull the hammer to half cock, set the set trigger and then go to full cock.

Can anyone shed some insight into Robbins locks and their worth or quality?

fdf

The problem is with the gun builder not the lock.
Dan

[bgf]

One thing that came to mind when I read this is to see if the triggers have a backlash adjustment -- that affects how high the rear bar of the trigger is held at rest, and consequently whether it presses on the sear bar or not.  Just a thought.

[fdf]

Dphariss,

I know nothing about Robbins locks, which is why  I wondered; why they are different from all the other double set locks that I have.

Your assesment I feel is totally correct.

I have had a couple of dealings with the Builder, none of which have been positive.  Part of the rifle was mis-represented, but I was busy and did not address things in the inspection period, my fault only.

Thanks to all for your help, I will tinker with it and follow your advice to see what can be done.

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