Yes the cones work great with all the vintage machines I've tried - just use a thread stand behind the machine.
Put a felt disk and a spool of thread on the spool pin on your machine and run the thread from the thread stand to under the felt to wherever it needs to go next in the threading sequence.
Alternately, you could tape a closed safety pin (or a very large-eye darning needle) to the spool pin and run the thread from the thread stand to the safety pin.