The noun “hob” refers to a metal shelf-like surface attached to a fireplace. Pans, kettles, and other kitchen utensils were placed on the hob to warm them with the fire’s heat.
The noun “stomacher” refers to a piece of triangular decorative fabric stitched on the front of a dress that went in and out of fashion in Victorian England. Often stomachers would be accented with pearls or embroidery.
The “trumpet” referred to in this sentence is not a musical instrument but an ear trumpet, a rudimentary type of hearing aid typically crafted from metal, wood, or animal products. Its name derives from its funnel-like shape.