Interesting patent

Title of the invention: Cold weather shoe

Publication number:      US3977093 A

Publication type:           Grant

Application number:      US 05/650,136

Publication date:           31 Aug 1976

Filing date:                  19 Jan 1976

Inventors:                    Gilbert L. Santroch

ABSTRACT: 

A hollow heel is movably mounted in the heel area of the bottom of a shoe. A battery is mounted in the heel. Electric heating elements are mounted at the bottom of the shoe in the area of the sole thereof. A switch at the bottom of the shoe in the heel area thereof is operable by the heel of the foot of a wearer. A circuit at the bottom of the shoe electrically connects the battery, the heating elements and the switch in circuit whereby the heating elements are selectively energized by the battery via the switch.