bedplate

plural bedplates

1. engineeringThe foundation framing or piece, by which the other parts are supported and held in place; the bed.

   They are mounted on bedplates which are flexibly mounted to the underframe.

   1958 April 28, “British Railways First Main-Line Diesel-Hydraulic Locomotive”, in Railway Magazine, page 265

   1 more example

   A is a cast iron cylinder, the dots representing punching irons upon its circumference; B is a travelling bedplate or carriage on which the sheet to be punched is placed; the dots....

   1847, editorial staff, “MACHINE FOR PUNCHING COPPER SHEETS”, in Scientific American, series 1, Volume 3, Issue 10, page 73

   Synonyms: baseplate, bedpiece, soleplate