U.S. patent number 3,839,622 [Application Number 05/318,606] was granted by the patent office on 1974-10-01 for electric, forced air towel warming cabinet.
Invention is credited to Kenneth S. Mastin.
United States Patent |
3,839,622 |
Mastin |
October 1, 1974 |
ELECTRIC, FORCED AIR TOWEL WARMING CABINET
Abstract
An electric forced-air towel warming cabinet is provided. The
device consists of an insulated chamber having a main chamber with
horizontal towel support racks which permit the unobstructed upward
flow of heated air therethrough and a second chamber which
surrounds the main chamber on the top, bottom and one side. Located
in the lower portion of the second chamber are a pair of blowers
which direct air past electric heating elements below the bottom of
the main chamber and upward through a perforated plate into the
main chamber. The heated air continues upward through the towel
support racks and out through a second perforated plate at the top
of the main chamber into the second chamber from whence it flows
downward to the blowers to complete a closed loop. Thermostatic
control means are provided on the lower perforated plate. The
thermostatic control means comprises a high temperature thermostat
and a low temperature thermostat arranged to selectively control
the temperature in the cabinet by means of a selector switch.
Inventors: |
Mastin; Kenneth S. (Las Cruces,
NM) |
Family
ID: |
23238865 |
Appl.
No.: |
05/318,606 |
Filed: |
December 26, 1972 |
Current U.S.
Class: |
219/400; 34/223;
126/21A; 219/413; 219/508; 392/360 |
Current CPC
Class: |
A47K
10/06 (20130101) |
Current International
Class: |
A47K
10/00 (20060101); A47K 10/06 (20060101); H05b
001/00 (); A21b 001/00 (); F24c 015/32 () |
Field of
Search: |
;219/364,508,366-370,400,413 ;126/21R,21A
;34/218,219,222,223,224,225 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Bartis; A.
Attorney, Agent or Firm: Brown; James J.
Claims
1. An apparatus for warming towels comprising an insulated,
double-walled enclosure, means disposed therein defining a main
chamber with plural towel open grid like support racks which permit
the upward, unobstructed flow of heated air therethrough and a
hinged door on said enclosure at the front of said main chamber for
access thereto from the outside; means defining an air circulation
duct within said insulated enclosure, said duct being coextensive
with and surrounding the top, bottom and one side of said main
chamber, the top and bottom of the main chamber being in air flow
communication with said air circulation duct by upper and lower
perforated plates which permit substantially uniform distribution
of air through the main chamber, said air circulation duct further
having operably disposed therein below the main chamber controlled
means for supplying heated air upward through said lower perforated
plate to the main chamber; said controlled means comprising an
electric heating element disposed beneath said lower perforated
plate and operably connected in a circuit with means for supplying
electrical power thereto and thermostat means disposed on said
perforated plate and operably connected in said circuit for
controlling the temperature in the main chamber; said controlled
means further comprising plural tangential blowers disposed below
the main chamber and having their respective inlets communicating
with the side portion of the air circulation duct and their
respective air outlets communicating with the bottom portion of the
air circulation duct for circulating air in a closed loop past said
heating element upward through said lower perforated plate into the
main chamber and then out through said lower perforated plate into
the main chamber and then out through said upper perforated plate
and back in a downward direction to
2. The apparatus of claim 1 wherein each of said towel support
racks comprises a series of spaced, horizontal, elongated members.
Description
SUMMARY OF THE INVENTION
This invention relates to electric warming apparatus and more
particularly to an electric warmer of dry towels. It is common
practice in hotels, motels, apartments, houses, any public or
private bathroom and dressing room to have towels on racks, or
folded on shelves, exposed to whatever the bathroom or dressing
room temperature and humidity conditions may be. It is the
principle object of this invention to provide a means for warming
dry towels to a temperature above that of a bathroom or dressing
room to increase the comfort of a person drying following a bath or
shower.
A further object of this invention is to provide an enclosed towel
warmer that minimizes exposure of a towel to the increased humidity
of bathroom air, particularly while a person is showering, there-by
maintaining the dryness of a towel.
It is a further object of this invention to provide an insulated,
enclosed towel warmer to substantially reduce heat losses, there-by
reducing the power demand factor and power consumption of the
apparatus while at the same time minimally affecting, and being
affected by, the temperature of the immediate environment, e.g.,
the bathroom.
These and other objects are accomplished according to the present
invention whereby an insulated enclosure is provided having a main
chamber with plural towel support racks which allow substantial
unobstructed heated air to pass therethrough. Adjacent to the main
chamber and also within the insulated enclosure is a second chamber
which surrounds the main chamber on its top, bottom and one side.
Housed within the lower portion of the second chamber are heating
elements and tangential blowers which direct air past the heating
elements and upward through a perforated plate into the main
chamber. In the main chamber, the heated air flows upward through
the towel support racks and out through a second perforated plate
at the top of the main chamber back into the second chamber where
it returns downward in a closed loop to the blowers. Thermostatic
control means are also provided.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a preferred embodiment of the
invention.
FIG. 2 is an electrical schematic of the ciruit to be used with the
preferred embodiment of the invention.
FIG. 3 is a perspective, partly cut-away view of the preferred
embodiment of the invention with the front panel removed.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1 is shown a perspective view of the invention. The
enclosure 1 is fabricated from sheet metal in a dual wall
construction with fiberglass insulation 33 placed in the space
formed between the two walls; the enclosure is finished with a
heat-resistant enamel. A front panel 12 is secured to the enclosure
1 base with a plurality of screws 13 disposed about its periphery.
A door 2 is mounted on the front panel 12 with a continuous hinge
3. The door is fitted with a handle 4 and two magnetic latches 6
and 7 which insure positive closure of the door. The door 2 frames
a glass window 5 resistant to heat exposure. The window 5 permits a
view of the towel or towels that may be in the towel warmer. Two
towel supporting racks 10 and 11 may be viewed through the window
5. The racks are made of a thick gage wire with nickle plating.
The lower right hand section of front panel 12 is an individually
detachable plate 32 which, when detached, provides access to the
towel warmer controls and control wiring. These controls are a
power on-off toggle switch 22, a pilot light 23 to indicate a power
on condition, and a two-position, low temperature-high temperature
selector toggle switch 24.
Still with reference to FIG. 1, two rubber strips 8 and 9 are
secured with adhesive the full length of the bottom of the towel
warmer when the apparatus is to be placed on the top of a toilet
water tank. Two steel angle brackets 25 and 26 are attached with
sheet metal screws to the top of enclosure 1 and two similar
brackets, not shown, are correspondingly attached to the bottom of
the enclosure 1 only when the towel warmer is to be built into a
wall; the brackets, in conjunction with nails or screws, provide
the means for securing the apparatus within the wall. When the
towel warmer is to be mounted on a wall, it is secured there-to
with a plurality of wood-screws through the rear side of case 1,
through the wall surfacing and into the wall vertical studs. The
rubber strips 8 and 9 are not used on the bottom of enclosure 1
when the towel warmer is either mounted on a wall or built into a
wall.
Now with reference to FIG. 3 the towel warmer is shown in a partial
cut-away view and with the front panel 12 removed. Removal of the
front panel 12 provides access to the apparatus for maintenance
purposes. Two blowers 14 and 15 are shown as units which include
electric motor drives; two are used to provide adequate air
circulation within the enclosure 1 while at the same time conform
to a compact utilization of space. The enclosure 1 bottom plate 28
has a screened-over opening 34 below the blowers 14 and 15. A
similar screened opening 35 is provided near the bottom of side
panel 29. The openings allow ventilation for the blower 14 and 15
motors. Further protection for the motors is accomplished by
disposing the motors outside the path of the enclosure 1
circulating air. A terminal box 16 serves to receive the wires from
an electric power source and then to distribute power to the
apparatus. The air impelled by the blowers 14 and 15 discharges
into a chamber 27 where-in is mounted the coiled Nichrome wire
heating element 17 which is supported by a plurality of ceramic
blocks 18. The top of chamber 27 is a baffled plate 19 with a
plurality of holes through which the heated air passes into the
rack 10 and 11 area of enclosure 1.
Two thermostats 20 and 21, mounted on baffle plate 19, provide the
dual temperature control means for the towel warmer. Mounted as
they are on baffle plate 19, which in turn is immediately above
heating element 17, the thermostats also serve to safe-guard
against dangerous over-temperatures in the event of failure of
blowers 14 and 15 while power to the heating element 17
continues.
Within the main chamber of enclosure 1 are disposed the two towel
racks 10 and 11; provisions are made for height adjustment of the
racks with a plurality of narrow angle pieces 30 spot welded to the
internal sides of enclosure 1. A continuous duct is formed by plate
31 along the internal top of enclosure 1 and then along the side so
that the duct communicates with the intake openings of blowers 14
and 15. That section of plate 31 disposed at the top of enclosure 1
is perforated with a plurality of holes. Thus an air flow circuit
has been completed with the blowers 14 and 15 causing air to be
drawn into the duct formed by plate 31 then through the blowers and
discharged into chamber 27 where the air is heated then passed
through the holes in baffle plate 19 to the main chamber of
enclosure 1 and once more to the intake of the duct formed by plate
31. The holes in the chamber bottom baffle plate 19 and in the top
plate 31 serve to distribute the air-flow through the width and
depth of the enclosure 1 chamber.
Referring to FIG. 2 there is shown an electrical schematic of the
operating circuit for the apparatus of the towel warmer. It is
shown operating in a high temperature condition. A separate
grounding terminal has been provided in terminal box 16 as a means
for positive grounding of the case to substantially reduce electric
shock hazards.
While a preferred embodiment of the present invention has been
shown and described, it will be understood that many changes and
modifications may be made thereto without departing from the scope
of the appended claims.
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