Author Topic: Robbins lock ?  (Read 743 times)

Offline Jim Curlee

  • Full Member
  • ***
  • Posts: 227
Robbins lock ?
« on: March 06, 2023, 07:42:57 PM »
I bought a Robbins lock for another plains rifle build.
There is a tiny screw in the back of the tumbler, what does is it do?

I also have a Robbins flintlock; the screw is not on that tumbler.


By the by, this is a very nice lock.

Thanks
Jim

Offline J. Talbert

  • Hero Member
  • *****
  • Posts: 2309
Re: Robbins lock ?
« Reply #1 on: March 06, 2023, 07:48:43 PM »
If it’s in the same position as was the one on some of Doc Hadaway locks, it was to serve as an adjustable stop.
A picture would help clarify…

Jeff
There are no solutions.  There are only trade-offs.”
Thomas Sowell

Offline Jim Curlee

  • Full Member
  • ***
  • Posts: 227
Re: Robbins lock ?
« Reply #2 on: March 06, 2023, 08:54:55 PM »
I know, I know, I forgot. lol

Jim


Offline Bob Roller

  • Hero Member
  • *****
  • Posts: 9687
Re: Robbins lock ?
« Reply #3 on: March 07, 2023, 12:55:24 AM »
POSSIBLY the screw can determine the depth of engagement of the sear at full cock to regulate the trigger pull or make it possible to use a set trigger.
Bob Roller

Offline J. Talbert

  • Hero Member
  • *****
  • Posts: 2309
Re: Robbins lock ?
« Reply #4 on: March 07, 2023, 04:35:29 AM »
POSSIBLY the screw can determine the depth of engagement of the sear at full cock to regulate the trigger pull or make it possible to use a set trigger.
Bob Roller

I stand corrected.  I believe it was controlling the depth of engagement that was the function of the similar screw on the Haddaway lock also.

Jeff
There are no solutions.  There are only trade-offs.”
Thomas Sowell