Stanley Yankee No. 41Y

[Bod]

As a drilling machine, these are quite crude, not many levels above a pointed stick dipped in damp sand.

There is no twisted fluting to remove the cut fibres, to be fair, with the return action, that would cause problems with compaction under the cutting edges. Which are ground only to cut on the forward rotation.
This means that the depth of holes is limited to 1/2 an inch, and removal of waste from horizontal or downward holes is not easy, unless the work piece can be tipped over.
Any slight wobble in the push down can mean a bent or more likely broken bit.

The bits are kept in the handle, which is released by the knurled ring under the handle, the bit is held in the "chuck" by pushing down the chuck away from the handle, opposite to all other Yankee's which are pulled up towards the handle.
However against all of this, they share the same advantage, as Brace & Bits.....
No noise, or flat batteries!

Bod

 

[dannyr]

I believe they are also interchangeable with the chuck on the very smallest home/diy version of the handyman drill/screwdriver with transparent handle holding spare bits and driver tips.
There are also scarce adapters so you can use these bits in one of the larger yankee drivers.
For a while (approx. in the 80s, 90s)Stanley did supply spiral versions of these bits.
I find them very useful for starter holes for screws in most woods.
Danny