Power pack with switch for plural primary-secondary connections

In a power pack for use with small electrical appliances to provide an operating voltage from a line voltage, comprising:

• a. a case and cover assembly for housing a transformer core and winding subassembly;
• b. a transformer subassembly in the housing including:
• 1. a bobbin molded of electrical insulating material and formed with a plurality of isolated cavities adapted for receiving and mounting soldering lugs, primary terminals and a switch assembly and formed with the other integral insulating formations for receiving and insulating the core from the windings;
• 2. primary and secondary windings wound on the bobbin;
• 3. primary and secondary soldering lugs secured in respective ones of said cavities and connected to selected taps on the windings;
• 4. primary terminals secured to the bobbin in other respective said cavities and connected to the primary winding, said primary terminals projecting from the cover for engaging a wall outlet to connect to the line voltage;
• 5. a laminated core secured to the bobbin and surrounding the windings and being insulated therefrom by said insulating formations;
• 6. a switch assembly mounted and retained in said switch assembly cavity formed in the bobbin, said switch assembly including a movable switch member with an operator member extending through and operable externally of said case and cover assembly with an electrically conducting contactor member operative in one position to electrically connect a tap on one side of said windings with a first circuit configuration on that side and with said operator member in an opposite position being operative to electrically connect a tap on the same side into a second circuit configuration on that side, said circuit configurations being operative in conjunction with said core, windings and the circuit configuration of the opposite side to provide a particular character of supply voltage for each said position.