U.S. patent number 3,859,496 [Application Number 05/416,209] was granted by the patent office on 1975-01-07 for heated inner sole and battery case for use in boot construction.
This patent grant is currently assigned to Comfort Products, Inc.. Invention is credited to Erik O. Giese.
United States Patent |
3,859,496 |
Giese |
January 7, 1975 |
HEATED INNER SOLE AND BATTERY CASE FOR USE IN BOOT CONSTRUCTION
Abstract
A heated inner sole for use in a boot where the inner sole
comprises a cellular plastic material overlaid by a fabric material
having heating elements therebetween. The opposite side of the
cellular material has a pressure sensitive adhesive thereon by
which the inner sole may be affixed to the inside of a boot. The
heating elements are connected by wiring to a battery contained in
a battery case carried by slide means attached to the boot
heel.
Inventors: |
Giese; Erik O. (Key Biscayne,
FL) |
Assignee: |
Comfort Products, Inc. (Aspen,
CO)
|
Family
ID: |
23649029 |
Appl.
No.: |
05/416,209 |
Filed: |
November 15, 1973 |
Current U.S.
Class: |
219/211; 36/2.6;
280/816; 36/117.1; 219/527; 607/111 |
Current CPC
Class: |
A43B
7/04 (20130101); A61F 7/007 (20130101); A43B
3/0005 (20130101); H05B 2203/036 (20130101); A61F
2007/0078 (20130101); A61F 2007/0001 (20130101) |
Current International
Class: |
A43B
7/04 (20060101); A43B 7/00 (20060101); A61F
7/00 (20060101); H05b 001/00 () |
Field of
Search: |
;219/211,527 ;128/383
;36/2.6,2.5Y ;136/181 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Albritton; C. L.
Attorney, Agent or Firm: Pennie & Edmonds
Claims
I claim:
1. An electrically heated inner sole and battery carrying case
construction adapted to be applied to a boot, comprising an inner
sole having electrical heater elements embedded therein, a movable
non-metallic slide adapted to be affixed to the exterior heel
portion of a boot, first electrical contacts on said slide, a lead
electrically connecting said slide and heating elements, a battery
carrying case having a track therein for slidably engaging said
slide, second electrical contacts on said case adapted to
electrically engage a battery within said case and to engage said
first contacts in a first position of said case on said slide and
to be disengaged from said contacts in a second position of said
case on said slide, and latch means on said slide for locking said
case in said first and second positions.
2. An electrically heated inner sole and battery case construction
according to claim 1 wherein said inner sole comprises in addition
a layer of cellular polyurethane foam material, a pressure
sensitive adhesive on one side of said layer of foam material, and
a layer of fabric material on the side of said layer of foam
material opposite said pressure sensitive adhesive with said
heating elements positioned between said layer of fabric material
and said layer of foam material.
3. An electrically heated inner sole and battery case construction
according to claim 1 wherein said battery case has first and second
indentations therein adjacent said track and wherein said movable
slide has a single locking ledge thereon for engaging either of
said first and second indentations to lock said case on said slide
in either of said first or second positions.
4. An electrically heated inner sole and battery case construction
according to claim 1 wherein the portion of inner sole adapted to
be positioned in the toe area of a boot has a greater concentration
of heating elements embedded therein than in the remainder of the
inner sole.
Description
BACKGROUND OF THE INVENTION
There have been numerous constructions proposed for electrically
heating boots or inner soles for use in boots in order that the
wearer's feet may remain warm in low temperature conditions.
Examples of such constructions are illustrated in a number of
patents including U.S. Pat. Nos. 1,274,451, 1,430,404, 2,028,347,
2,692,326 and 3,621,191. None of the constructions of which I am
aware however provide a means for conveniently attaching a battery
to a boot where the means contains a switch by which the battery
may be conveniently switched on and off in order to provide current
to electrical resistance wires contained within an inner sole of
the boot and where the switch may be operated notwithstanding snow
or ice conditions.
Further much of the prior art has required considerable alteration
to the boot structure or has required a particular special boot
construction. In many instances, such as with ski boots, there are
many different types of boots available and usually the wearer is
accustomed and desires a particular type of boot. Thus it is
desirable that any heated inner sole means for use with boots, and
particularly ski boots, be easily adaptable for use in a bott
without any major alteration of the boot structure.
An object of my invention is to provide an inner sole which may fit
into any boot and which may be connected by wiring to a battery
carrying case in turn adapted to be attached to the heel portion of
the boot.
GENERAL SUMMARY OF THE INVENTION
Broadly my invention comprises a plastic foam inner sole having
heating elements thereon which are overlaid by a further fabric
layer. The side of the inner sole opposite the heating elements has
thereon a pressure sensitive adhesive such that the inner sole may
be easily secured within a boot. A movable slide means is mounted
in the exterior heel portion of the boot and includes means for
engaging a case which may slide up and down on the slide means. The
casing contains a battery and has thereon contact means adapted to
engage contacts contained on the slide and which in turn are
attached to wiring leading to the inner sole. Latch means are
contained on the slide means for locking the case against movement
and into positions where the contacts on the case connect or
disconnect with the contacts on the slides.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a ski boot showing the placement of a
battery carrying case constructed according to the invention;
FIG. 2 is a partial sectional plane view of an inner sole for use
in the boot of FIG. 1;
FIG. 3 is an enlarged cross-sectional view of FIG. 2 taken along
line 3--3;
FIG. 4 is an enlarged cross-sectional view of the battery carrying
case of FIG. 1 taken along lines 4--4;
FIG. 5 is a view of FIG. 4 taken along lines 5--5 illustrating a
slide means for supporting the battery carrying case;
FIG. 6 is a view of the battery carrying case of FIG. 4 taken along
lines 6--6; and
FIG. 7 is a cross-sectional view of FIG. 6 taken along lines
7--7.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, there is illustrated a conventional ski boot 1
having thereon a combined battery carrying case and switch 2 where
a battery in the case provides energy for a heated inner sole 3
adapted to be contained in the boot. The inner sole 3 comprises a
layer of high density cellular polyurethane foam material 4 having
a pressure sensitive adhesive 5 on one side thereof. The other side
of the layer of foam material has a layer of fabric material 6
applied thereto where the material preferably comprises a plastic
or a mixture of plastic and cotton. The fabric layer 6 is held to
the foam material by pressure sensitive adhesive 7. Electrical
resistance elements 8 are interposed between the foam material 4
and the fabric material 6 and connect with a lead wire 9.
As shown in FIG. 2, the elements 8 are disposed in the toe area of
the inner sole and are so arranged that there is a greater
concentration of the elements towards the forward end of the inner
sole to provide more heat in the toe area. It has been found that
in cold weather situations, the portion of a foot most sensitive to
cold is the toe portion rather than other portions such as the
heel.
The lead wire 9 may extend along the bottom of the boot to the rear
thereof to connect with clamping screws 10 and 10' which extend
through the boot and are threaded into metallic brackets 12 and
12'. In some boots, for example ski boots having a double wall
construction comprising inner and outer boots, the wire 9 may
extend out through the tongue area of the inner boot and around the
inner boot to the heel area of the outer boot to connect with the
clamping screws.
As shown in FIGS. 4-7 the metallic brackets 12 and 12' have a
non-metallic slide 14 attached to the brackets by means of screws
15--15' and 16--16'. The slide 14 has a tongue portion 18 which is
movable in the direction of the double ended arrow 20 as shown in
FIG. 7. The tongue 12 has a ledge 22 thereon which acts as a
locking latch described in greater detail hereafter.
Referring to FIG. 4, there is illustrated the battery carrying case
2 which carries therein a battery 24. The case 2 has a plastic
container 26 which is adapted to be closed by a plastic cover 28.
The cover has a reduced shoulder portion 30 which snaps into the
outer shoulder portion 32 of the container whereby the cover may be
secured to the container.
The cover 28 has rails 34 and 34' thereon to form a track which may
slidably engage the slide 14.
Copper strips 36 and 36' are contained within cutouts on the cover
28 and are held in the cutouts by means of rivets 38 and 38'. Each
strip has a raised contact or shoulder portion 40 and 40' adapted
to engage screws 15 and 15' where the screws likewise act as
contacts. Conventional wiring, not shown, extends from the poles of
the battery 24 to the rivets 38 and 38'. When the case 2 is in the
position shown in FIG. 7, a contact will be made between the raised
portion 40 and the screw 15 to complete one leg of an electrical
circuit between the battery and the heating elements 8 by way of
the rivet 38, contact 40, contact 15 of the slide, through the
metallic bracket 12, screw 10 and to the lead wire 9. Similar
contact is made through the similarly numbered elements to complete
the circuit back to the battery.
The cover 28 has a first indentation 42 and a second indentation 44
adapted to engage the shoulder 22 on the tongue 18 to lock the case
against movement relative to the slide. In FIG. 7 the shoulder 22
is shown engaging the first indentation 42 and latching or locking
the battery case in the first or on position.
The cover 28 further has a cutout portion 46 which acts in
connection with the tapered portion 50 of the tongue 18 as a guide
and cam to assist in positioning the rails 34 to engage the slide
14. Stops 48 and 48' are included at the end of the rails 34 and
34' and limit the downward movement of the case on the slide.
Preferably the battery 24 is of the rechargable type. In the
construction shown, the battery may be easily removed from the
track and applied to a recharger.
The operation of the device is as follows. The tongue is moved
towards the boot and the battery case is applied to the slide 14.
The tapered portion 50 will engage the cam 46 to assist in
directing the rails of the case into engagement with the slide as
the case is slid down onto the slide. The tongue 18 is then
released. As the case is moved down the slide, the shoulder 22 will
engage the indentation 44 thus latching or locking the case into
its off or second position. As shown in FIG. 7, the tongue has on
the end thereof "on" and "off" notations. When the latch engages
the indentation 44, only the "off" notation will show above the
case. When it is desired to warm a foot, the tongue 18 is again
moved to the right as shown in FIG. 7 allowing the case to be moved
down the slide until the shoulder 22 engages the indentation 42
where the tongue is allowed to return to its position as shown in
FIG. 7. At this position the contacts 40 and 40' on the copper
strips engage the contacts 15 and 15' on the slide thus completing
an electrical circuit with the inner sole.
An inner sole and battery case construction according to my
invention may be easily applied to conventional boots. All that is
required is to drill four small holes in the heel area of the boot
so as to receive the screws 10--10' and 11--11' by which the
metallic brackets 12 and 12' are held to the boot and the
electrical connection between the interior and exterior of the boot
is made. The inner sole may be conveniently cut to fit in the boot.
The use of a pressure sensitive adhesive allows easy placement of
the inner sole in the boot as all that is required is to place the
inner sole in the boot, put the boot on, and step on it whereby the
weight of the wearer will then assure sufficient pressure to make
the inner sole stick to the boot. For packaging purposes, the
pressure sensitive adhesive would have a slip paper protective
covering overlying the adhesive which would be stripped off prior
to use.
* * * * *