1858 23 Jan. 154/2 Spiral springs have been used between the pad plate and nut, for the purpose of easing the horse.
1860 5 May 300/1 Improvement in Harness Pads:..the combination with the perforated pad plate, A, of a U-shaped washer plate, B.
a1877 E. H. Knight II. 1595/1 Pad-plate, an iron bow..upon which the pad is made.