'baroque' time signatures

[Werner LEMBERG]

In modern transcriptions of baroque music it is custom to use time
signatures for half the length.  For example, if you have 4/2 bar, the
time signature shows 'C'; if you have a 6/1 bar, the time signature
shows '3/1'.

Is there a simple way to get the equivalent to the following (invalid)
syntax?

```
\time 4/2*1/2
\time 6/1*1/2
```


   Werner