pipe tongs
look for a herald mark up near the pivot.
if they're not too terribly pitted you should be able to find a stamp.
possibles:
Ashcroft / E.H. Ashcroft Co., Boston, MA (see also Ashcroft Mfg. Co., Bridgeport CT) / "Brown's patent" pipe tongs / TM 4102 Nov 7 1876 Edward H. Ashcroft & patent 22157 Nov 30 1858 & 79724 Jul 7 1868 James R. Brown /
http://vintagemachinery.org/mfgindex/detail.aspx?id=7337&tab=0 /
https://www.garagejournal.com/forum/threads/ashcroft-pipe-tongs-the-forgotten-tool.524784/ /
http://progress-is-fine.blogspot.com/2017/08/vanished-tool-makers-ashcroft.html /
https://ashcroft.asia/about-us/at-a-glance/history/#history-tab-1 /
Beach / Allen Beach, 18 Bowker St., Boston, MA / "Brown's Patent" pipe tongs / patent 22157 Nov 30 1858 James R. Brown & 19842 Aug 6 1858 Henry H. Gilmore & 79724 Jul 7 1868 James R. Brown & RE2283 Jun 12 1866 Henry H. Gilmore / see also James R. Brown, see also E.H. Ashcroft /
Brown / "Brown's patent" pipe tongs see E.H. Ashcroft Co. / James R. Brown, 39 Front St., Chelsford, MA (1854) / patent 142143 Aug 26 1873 & 144253 Nov 4 1873 & 145929 Dec 30 1873 James R. Brown /
https://freepages.rootsweb.com/~ahgilbertson/genealogy/browndesc.pdf / see also Hazen P. Huntoon /
doubtful, but I will include it anyway just in case:
Huntoon / Hazen P. Huntoon, Cambridge, MA / "Pipe tongs" / patent CA 2923 Dec 10 1873 Hazen P. Huntoon / Huntoon's Canadian patent 2923 incorporates features found in James R. Brown's patents 142143 Aug 26 1873 & 144253 Nov 4 1873 & 145929 Dec 30 1873 /
see also:
US patent 22,157 Pipe-Tongs was issued to James R. Brown of Boston, MA. It was granted on 11/30/1858. Brown's patent pipe tongs had the fulcrum point in a block which could be moved by an adjusting screw. Brown's Pipe Tongs (with later refinements) was
datamp.org
I am not able to find my notes on this one. Stan Schulz (datamp.org) and I went back and forth on "tongs" for a few weeks. Brown was issued the patent, but did not himself have any manufacturing capabilities. Ashcroft appears to have been the primary manufacturer, but from evidence Stan and I dug up, it appears Mr. Brown wasn't picky about who was making his tongs - anybody with a forge was good enough - that's where Allen Beach comes into the picture.