C.E. DeLong of Hot Springs, Arkansas,had three single trigger patents -- 670,100, 690,243, and 699,291 -- where the drawings were on a Remington action, and 690,243 was assigned to Remington Arms Co.
E.D. Fulford of Utica, New York, had three single trigger patents -- 704,025, 749,687, and 751,979 -- where the drawings were on a Remington action.
E.H. Thorneley of Ilion, New York, had two single trigger patents -- 568,285 and 673,803 -- where the drawings were on a Remington action.
G. E. Witherell of Hartford, Connecticut, had five single trigger patents -- 697,061, 767,537, 808,890, 808,964, and 836,167 -- all assigned to Remington Arms Co. though the first and last appear to be drawn on a Syracuse Arms Co. action.
Could you post some pictures so we can see the trigger on your gun? In addition to guns found with "factory" experimental triggers there have been several companies that offered aftermarket single triggers -- Philadelphia Single Trigger Co. of Philadelphia, Pennsylvania; Lancaster Arms Co. of Lancaster, Pennsylvania; and Miller single Trigger Mfg. Co. of Millersburg, Pennsylvania.
Here is a possibly a Lard single trigger on a Remington that someone sent me pictures of quite a while ago --
