Hi Eton Sun,
Some of the info that I have:
1828...listed as Heaton Brothers, button makers and brass rollers. If you put in your search on your main server "OldCopper", there is a web site that gives you all the identifying marks of this company, they also tell you something about what they make..very intersting
1829....listed as Heaton Brothers, metal rollers
1830...listed as Heaton Brothers, metal rollers
1839..Listed as Heaton & Brothers, manufacturers of brass and copper wire, plain and ornamental gilding and dipping, mouldings, window sash bar, gilding and dipping materials, hook and eye manufacturers.
1842...listed as Heaton Brothers
1896...listed as Heaton & Duggard..they joined forces with the Duggard Brothers from Vulcan Mills
Hope this helps