U.S. patent number 3,621,191 [Application Number 05/030,497] was granted by the patent office on 1971-11-16 for electrically heated footwear and handwear.
Invention is credited to Woodrow D. Cornwell.
United States Patent |
3,621,191 |
|
November 16, 1971 |
ELECTRICALLY HEATED FOOTWEAR AND HANDWEAR
Abstract
Electrically heated footwear and handwear is disclosed in which
an ionomer plastic insulating layer is fitted into a shoe or other
footwear and a mitten or other handwear of conventional
construction. A long stranded heating wire is embedded in a
heat-conducting plastic member which is positioned beneath the
insole of the footwear and within the insulating plastic cover of
the mitten. The wires are connected to a source of low-voltage
electricity for resistance heating in order to maintain the
footwear and handwear at a comfortable temperature.
Inventors: |
Woodrow D. Cornwell
(Middletown, VA 22645) |
Family
ID: |
21854465 |
Appl.
No.: |
05/030,497 |
Filed: |
April 21, 1970 |
Current U.S.
Class: |
219/211; 607/111;
36/2.6; 2/158 |
Current CPC
Class: |
H05B
3/342 (20130101); A41D 19/01535 (20130101); A43B
7/025 (20130101); H05B 2203/014 (20130101); H05B
2203/036 (20130101); H05B 2203/003 (20130101) |
Current International
Class: |
A43B
7/02 (20060101); A43B 7/00 (20060101); H05B
3/34 (20060101); H05b 001/00 () |
Field of
Search: |
;219/211,527,529,538,549
;36/2.6 ;128/379,381-383,402 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: C. L. Albritton
Attorney, Agent or Firm: John B. Dickman, III
Claims
1. A mitten comprising a hand-encompassing cover, an ionomer foam
plastic liner for said cover, an electrically heated pad insert
removably positioned within said cover for contact directly with
the back or palm of the hand of the user, said pad including a
stranded electric heating wire embedded in a relatively thin sheet
of heat-conducting plastic.
Description
The present invention relates to heated footwear such as shoes and
boots and heated handwear such as mittens and gloves.
Prior art electrically heated footwear and handwear utilized solid
short lengths of wire for low-voltage heating or used high voltage
for heating longer lengths of stranded wire.
The present invention is directed to the heating of mittens and
shoes and like handwear and footwear by providing an insulating
layer of ionomer plastic within which, in the case of the handwear,
is a layer of heat-conducting plastic having a stranded heating
wire embedded therein. In the case of the footwear the heating wire
layer is provided on the sole only of the shoe.
The primary object of the invention is to provide electrically
heated handwear and footwear which maintains a uniform temperature
on the feet and hands of the user.
Other objects and advantages will become apparent in the following
specification when considered in the light of the attached
drawings.
FIG. 1 is a front elevation of a complete mitten constructed in
accordance with the invention;
FIG. 2 is an enlarged fragmentary transverse cross section taken
along the line 2--2 of FIG. 1 looking in the direction of the
arrows;
FIG. 3 is a rear elevation of the heating insert for the mitten of
FIG. 1;
FIG. 4 is a side elevation of a shoe constructed in accordance with
the invention;
FIG. 5 is a top plan view of the heating insole of the shoe
illustrated in FIG. 4;
FIG. 6 is an enlarged fragmentary transverse sectional view taken
along the line 6-6 of FIG. 4 looking in the direction of the
arrows; and
FIG. 7 is an enlarged fragmentary vertical sectional view of the
heating insole.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings in detail wherein like reference
characters indicate like parts throughout the several figures the
reference numeral 10 indicates generally a mitten constructed in
accordance with the invention.
The mitten 10 includes an outer covering 11 having a thumb portion
12 and a finger portion 13 both integrally joined to a wrist
portion 14. The outer covering 11 is completely lined with a
relatively thin layer of ionomer foam plastic 15 to serve as
insulation for the mitten 10.
A heating insert 16 includes a finger portion 17 having a thumb
portion 18 integrally connected thereto. The insert 16 has an inner
surface 19 to contact the hand within the mitten 10 and a layer 20
of heat-conducting plastic within which stranded heating wires 21
are molded. The heating wires 21 extend throughout the insert 16
and terminate in a plug 22 which can be connected to a source of
low-voltage electricity. The insert 16 is a hot pad which can be
worn either in contact with the back or the front of the hand to
suit the wearer.
Referring now to FIGS. 4 through 7 the reference numeral 30
indicates generally a shoe incorporating another embodiment of the
invention.
The shoe 30 includes a sole 31, heel 32 and an upper 33, all formed
of conventional material. The sole 31 and upper 33 are completely
lined with an ionomer foam plastic layer 34 to insulate the shoe
30. An inner lining 35 protects the foam plastic layer 34 and
provides a smooth inner surface for contact with the foot of the
wearer.
A pad 36 formed of heat-conducting plastic is shaped to the sole of
the shoe 30 and has a stranded heating wire 37 molded therein. The
wire 37 is connected to a plug 38 mounted on the upper 33 for
connection to a source of low-voltage electricity.
The pad 36 is fitted into the shoe 30 beneath the insole 38 as can
be seen in FIG. 6. It should be understood however that the pad 36
can also be inserted in a shoe on top of the insole 38 should this
be desired.
The mitten and shoes of the present invention maintain a uniform
heat on the hands and feet of the wearer without undue electric
power requirements.
Having thus described the preferred embodiments of the invention it
should be understood that numerous structural modifications and
adaptions may be resorted to without departing from the spirit of
the invention.
* * * * *