Antique Wood,Cast Iron & Brass Moving Mechanism-What is it ?

Dear Tool/Machine Friends-Here's something I came across years ago at a Garage Sale.It's 11 inched long,it consists of a long steel spindle w/ lathed (grooved on the edges for a leather belt drive ?),and as the wheels are turned the cast iron arm is hit by a flange and the iron arm & the wood arm on reverse goes up & down.There's also a thin brass keeper/arm of some type.No markings.Looks hand made except the sand cast cast iron arm.Any guesses what this thing does,and what it was used on ?
Thanks-Bosko

 

Without dimensions, this is just a guess; Looks like a bobbin or spool winder. Perhaps from a textile mill?

 

This is just a WAG...........no idea how it works or what is the purpose.
https://www.invaluable.com/auction-...-steam-engine-tin-accessory-230-c-7874e5580f#

 

The dimensions of this piece are 10 1/2" lngth x 3 3/4" wdth x 4 3/4" ht.There's also a sprocket/gear at the end of the higher wheel.

 

would you call the one piece where the wooden bar attaches a rocker arm?

 

when the the cast iron arm (resting on a spring) is pushed down on,the brash lever arm pulls the rear spindle/wheel forward.the wooden arm on the opposite side moves down also.thanks for interest-i wonder if i can post a short video of it moving (?).

 

Sorry-Meant the 'Brass Lever Arm' (not 'Brash' !).