\DeclareFontFamily{OMS}{cmsssy}{\skewchar\font48 }
\DeclareFontShape{OMS}{cmsssy}{m}{n}{%
<5-6>cmsssy5%
<6-7>cmsssy6%
<7-8>cmsssy7%
<8-9>cmsssy8%
<9-10>cmsssy9%
<10->cmsssy10%
}{}
\DeclareFontShape{OMS}{cmsssy}{b}{n}{%
<5-6>cmsbsy5%
<6-7>cmsbsy6%
<7-8>cmsbsy7%
<8-9>cmsbsy8%
<9-10>cmsbsy9%
<10->cmsbsy10%
}{}