new trigger sear design(s)

[studley192]

Hi, i came up with some sketches of possible sear assmeblies that i hoped were more efficient than the existing one. I lost my first sheet of sketches, which had much more, but heres some more.

my main ?'s are-

Will these work?

If so, will they be more efficient ( lighter pull, faster pull)?

are too many peices involved?

is this too complicated?

does anyone else have some feasible designs?


You can probably tell how it works from teh picture, but let me explain the geared sear assem. The trigger has a rounded edge with gear threads. When pulled, it turns a gear (lets just pretend) 1/2 of its size, thus the small gear spins twice as fast. A rod through the small gear is attached to a gear 2 times that gear size. The larger gear will be the same size as the one on the trigger, but two times as fast in rotation.

Another gear half its size is next in line. This will turn 4 times as fast i think. Again, this gear has a rod going to a larger gear, which finally turns a flat (dont know the name) which pushes the on off. Basically the ratio goes up each gear, for a extremely fast pull. Lighter? dont know

anyway, tell me what you think, maybe i can get some more ideas down.

[QUINCYMASSGUY]

sear

Hey man, definitely got to give you points for tinkering, I love coming up with stuff and you'll learn alot about paintball gun mechanics thinking it through.

I'd have to say most of those are too complicated for anyone to want to deal with them, and gears generally are best to be avoided as keeping them perfectly in time, actual benefit, results of wear, etc. make them unbeneficial. We've thought about it before. And alot of the multilever ones would be a pain to set.

However, keep thinking it through, and check out the Sear Mod in the workshop that Jack and Coke (and originally myself too) thought up, it would let you change your pull around. Keep it up and best of luck.

[hunter100]

The problem with using gears and levers to reduce the pull force is it will increase the required pull distance at the same time. The fundamental concept is the conservation of energy in the system. The work input at the trigger must equal the work output at the on/off assembly, regardless of what's between the two. Since the required force, call it F1 and required distance, D1 at the on/off pin are fixed and cannot change, the total energy to fire the gun is a constant, F1 x D1. The force and distance for the trigger, F2 and D2 respectively, must multiply to equal the energy used at the on/off, or F2 x D2 = F1 x D1. What I'm trying to get at is that when you decrease the force at the trigger, you must increase the distance. Decrease the distance, and you will increase the force. These values are measured only at the trigger and on/off, and do not depend on the mechanism between the two. Gears would only be useful to change the direction of forces, they can't be used to change the initial force distance relationship.

There are two ways I can think of to lighten the pull without adding distance. The first, is a lighter on/off, such as the ULT mod. The other way is to include a device to add force somewhere in the system. Maybe you could get a spring or pneumatic device into the setup to take some weight off the trigger.

[jdev]

studley

holy jesus. I had the same idea for a trigger sear. everything except for the gear design. Ill try and scan some pics later to show a design of it.

looks good buddy!

[billmi]

Some thoughts.

First - none of these will work in an Automag, because they lack a method for locking the bolt in the rear position when the on/off is open, and releasing it while closing the on/off.

Second - Hunter summed it up well. Mechanical advantage, whether from levers or gears (which are the same as levers, but over a 360 degree range of rotation). You can use a system like this to lighten the weight of the trigger pull, but that will make the trigger pull longer. If you use the system to make the trigger pull shorter, you will make the trigger pull heavier. Mechanical advantage just lets you trade one for the other - nothing is free.

Some alternatives are a power assist - like the E-Mag, where electronics detect the trigger movement, and then add additional energy to the sear through the pull of a solenoid, or power steering that detects the pull on a steering wheel and then adds energy through hydraulics.

See you on the field,
-Bill Mills