Can't find Cassiopias Schedar or Caph in Tycho-2 catalog supplement 1
Alpha Cas (Schedar) is  TYC 3663-2668-1 or HIP 3179 in the Hipparcos catalogue.

http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Schedar&amp;NbIdent=1&amp;Radius=2&amp;Radius.unit=arcmin&amp;submit=submit+id

Beta Cas (Caph) is not in the Tycho-2 catalogue but is in the Hipparcos catalog as HIP 746

http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Caph&amp;NbIdent=1&amp;Radius=2&amp;Radius.unit=arcmin&amp;submit=submit+id

Gamma Cas is also does not have a Tyc number but is listed as HIP 4427 in the Hipparcos catalogue.

http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Gamma+Cas&amp;NbIdent=1&amp;Radius=2&amp;Radius.unit=arcmin&amp;submit=submit+id

All three of these stars are right at the bright limit of the Tycho-2 catalogue.