Transformer with tapped subwindings

A transformer comprising:

• a first electrical winding;
• three physically spaced inductive subwindings, each having a plurality of first through n+1 section outputs connected thereto so that each consecutive pair of outputs defines first through n winding sections;
• means for inductively linking said first winding with said three subwindings;
• a first tandem switch, including:
• a first plurality of first through n+1 selectively connectable contacts, each of said first plurality of contacts being connected to a respective one of the first through n+1 section outputs of a first one of said three inductive subwindings;
• a second plurality of first through n+1 selectively connectable contacts, each of said second plurality of contacts being connected to a respective one of the first through n+1 section outputs of a second one of said three inductive subwindings;
• first wiper contact means mounted in said first tandem switch for coacting with said first plurality of contacts;
• second wiper contact means mounted in said first tandem switch for coacting with said second plurality of contacts;
• means for synchronously operating said first wiper contact means and said second wiper contact means;
• means for electrically connecting said first wiper contact means to the first section output of the second one of said three inductive subwindings;
• and
• means for electrically connecting said second wiper contact means to the n+1 section output of the first one of said three inductive subwindings;
• a second tandem switch, including:
• a third plurality of first through n+1 selectively connectable contacts, each of said third plurality of contacts being connected to a respective one of the first through n+1 section outputs of the second one of said three inductive subwindings;
• a fourth plurality of first through n+1 selectively connectable contacts, each of said fourth plurality of contacts being connected to a respective one of the first through n+1 section outputs of a third one of said three inductive subwindings;
• third wiper contact means mounted in said second tandem switch for coacting with said third plurality of contacts;
• fourth wiper contact means mounted in said second tandem switch for coacting with said fourth plurality of contacts;
• means for synchronously operating said third wiper contact means and said fourth wiper contact means;
• means for electrically connecting said third wiper contact means to the first section output of the third one of said three inductive subwindings;
• and
• means for electrically connecting said fourth wiper contact means to the n+1 section output of the second one of said three inductive subwindings;
• and
• output means for providing a voltage discretely variable from a first voltage to a second voltage three times greater than said first voltage as said first, second, third and fourth wiper contact means are moved from a synchronized first position relative to said pluralities of selectively connectable contacts wherein said three inductive subwindings are in total parallel to a synchronized n+1 position relative to said pluralities of selectively connectable contacts wherein said three inductive subwindings are in total series, said output means including a single pair of output terminals comprising:
• a first output terminal connected to the first section output of the first one of said three inductive subwindings;
• and
• a second output terminal connected to the n+1 section output of the third one of said three inductive subwindings, which n+1 section output is the section output farthest from the section output to which said first output terminal is connected.