You have to go back to 1881 before Sam was born! to find his Father (mum Elizabeth a Widow in 1901, and cant find the Family in 1891)....... turns out that she was Maiden'ed PLATT, and living with a Tom Goldthorpe in her Fathers house in 1881. RG11 Piece 4074 Folio 65 Page 23, @ 4 Coppice St, Oldham.
Tom was born c1848, in Royton, Lancs and was a Book Keeper - Iron Foundry
This will be the marriage ...
Marriages Dec Q of 1867
Goldthorpe, Tom Oldham 8d 1011
Platt, Elizabeth Oldham 8d 1011