Correct spelling for the English word "Pompet" is [pˈɒmpɪt], [pˈɒmpɪt], [p_ˈɒ_m_p_ɪ_t] (IPA phonetic alphabet).
Old name of a printers ball for spreading the ink on the types.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.