U.S. patent number 3,654,428 [Application Number 05/040,219] was granted by the patent office on 1972-04-04 for apparatus for heating and conditioning hair curling rollers.
This patent grant is currently assigned to The Songrand Corporation. Invention is credited to Marvin W. Litman, Samuel L. McNair, Henry J. Talge.
United States Patent |
3,654,428 |
Talge , et al. |
April 4, 1972 |
APPARATUS FOR HEATING AND CONDITIONING HAIR CURLING ROLLERS
Abstract
A circular pan-like base is fitted with a rotatable imperforate
support tray on which hair curling rollers can be deposited in
upended position. Electric heat means at the bottom of the base
operates to boil water causing steam to arise around the tray. The
top of the base is covered by a hinged cover having an inside
pattern of radial striations for collecting and guiding condensate
back toward the periphery of the unit where it can drain by gravity
back into the water below the tray. A dispensing chamber for hair
conditioning composition is located on the tray and the tray is
provided with drain passages for carrying condensate and
conditioning medium deposited on the tray to the rim for discharge
into the water below. Steam venting means and liquid level control
means both designed to inhibit collection of condensate on the
exterior of the unit are provided.
Inventors: |
Talge; Henry J. (Kansas City,
MO), McNair; Samuel L. (Shawnee Mission, KS), Litman;
Marvin W. (Prairie Village, KS) |
Assignee: |
The Songrand Corporation
(N/A)
|
Family
ID: |
21909784 |
Appl.
No.: |
05/040,219 |
Filed: |
May 25, 1970 |
Current U.S.
Class: |
392/336; 126/369;
219/222; 219/401; 422/297; 126/381.1; 99/347; 132/229; 219/242;
219/521; 392/338 |
Current CPC
Class: |
A45D
4/16 (20130101) |
Current International
Class: |
A45D
4/16 (20060101); A45D 4/00 (20060101); H05b
003/60 (); A45d 004/06 () |
Field of
Search: |
;219/271-276,284-295,401,222-226 ;21/93-99
;126/20,20.1,20.2,369,369.1,369.2,369.3,381-386 ;132/33,36
;99/347,440 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Bartis; A.
Claims
Having thus described our invention we claim:
1. Apparatus for heating and conditioning hair curling rollers
comprising
a closed vessel having a pan-like base and a cover for the
base,
an imperforate roller support tray disposed within said base and
spaced above the inside bottom thereof, said tray having an outline
in plan similar to the inside horizontal cross sectional outline of
the base with the periphery of the tray close to but spaced
slightly from said inside wall,
electrical means located beneath said tray adjacent the inside
bottom of said base for heating water in the base by applying
potential to the water between a pair of immersed electrodes,
the upper surface of said tray provided with drainage channels
radiating outwardly from the central portion thereof for returning
condensate to the periphery of said tray,
said tray including a plurality of upstanding rings forming annular
channels on said tray, said rings interrupted at said drainage
channels to permit flow of condensate past the rings.
2. Apparatus as in claim 1,
said cover including on its inside surface a plurality of
alternating radial ridges and grooves inclined downwardly from the
center toward the rim thereof.
3. Apparatus as in claim 1, including
a standpipe projecting upwardly from the inside bottom of said base
and having a vertical passageway therethrough continuing through
the bottom of the base and providing a water level control means,
and
buoyant cap means normally covering said pipe but floatable to an
uncovering position in the event of increase in the level of water
to a level above the upper end of said standpipe.
4. Apparatus as in claim 3,
said cap having a small perforation therethrough permitting limited
steam flow through said cap into and out of said passageway.
5. Apparatus as in claim 1,
said base having an opening through the side wall thereof near the
upper edge, and
a baffle plate on the exterior of said base partially screening
said opening and forming a water trap on the exterior of said
base,
said base further including drain channels communicating between
said trap and the interior of said base for drainage of water from
said trap back into the base.
6. Apparatus as in claim 1, including a member supported on said
tray having a cup-like chamber therein for receiving and storing a
hair conditioning composition,
said member comprising an upstanding tube having its lower end
adjacent the central portion of the tray and having the receptacle
recessed in the upper end thereof,
said receptacle having a perforation in its bottom and
means between the lower end of the member and the tray providing
passageways between the inside and outside of the member.
7. Apparatus for heating and conditioning hair curling rollers
comprising
a closed vessel having a pan-like base and a cover for the
base,
a roller support tray disposed within said base and spaced above
the inside bottom thereof,
electrical means located beneath said tray adjacent the inside
bottom thereof for heating water in the base by applying potential
to the water between a pair of immersed electrodes,
said cover including on its inside surface a plurality of
alternating radial ridges and grooves inclined downwardly from the
center toward the rim thereof.
8. Apparatus as in claim 7, including
a standpipe extending upwardly from the inside bottom of said base
and having a vertical passageway therethrough continuing through
the bottom of the base and providing a water level control, and
buoyant cap means normally covering said pipe but floatable to an
uncovering position in the event of increase in the level of water
to a level above the upper end of said standpipe.
9. Apparatus as in claim 8,
said cap having a small perforation therein permitting limited
steam flow therethrough into and through said passageway.
10. Apparatus as in claim 7,
said base having an opening through the side wall thereof near the
upper edge, and
a baffle plate on the exterior of said base partially screening
said opening and forming a water trap on the exterior of said
base,
said base further including drain channels from said trap back into
the interior of said base for drainage of water from said trap to
the interior of the base.
11. Apparatus as in claim 7, including
a member supported on said tray having a cup-like chamber therein
for receiving and storing a hair conditioning composition.
12. Apparatus as in claim 11,
said member comprising an upstanding tube having its lower end
adjacent the center portion of the tray and having the receptacle
recessed in the upper end,
said receptacle having a perforation in its bottom, and
means between the lower end of the member and the tray providing
passageways between the inside and outside of the member for flow
of liquid descending to the member from said receptacle from the
interior of said member onto the surface of the tray outside said
member.
Description
SUMMARY OF THE INVENTION
One of the principal objects of the present invention is to provide
a hair curling roller heating unit which utilizes electric energy
for generation of steam in a vessel containing such rollers and in
which the construction of the vessel and roller support tray is
such that the danger of accidental electric shock to the user is
substantially nil. It is special feature of the invention that the
complete safety of the unit is achieved in a manner which still
permits free and full circulation of steam around the rollers while
they are in the vessel and the ready and rapid return of condensate
deposited within the vessel back to the body of water being
subjected to heating.
A common complaint with respect to steaming vessels currently
available on the market is that there is danger of accidental
electric shock. Such vessels are provided with perforate roller
support trays which have a multitude of openings through which
electrically conductive objects such as bobby pins, metal knitting
needles and the like could be passed. Since the heating means
comprises spaced electrodes beneath the water, the water is charged
with a positive potential and in the event a holder of an immersed
object such as a bobby pin is well grounded a serious shock can
occur. In our invention, the tray for the rollers is imperforate
and there is substantially no direct passage from above the tray
into the body of water stored below.
Another important object of our invention is to provide a vessel
for heating curling rollers which is so constructed as to collect
and guide excess condensate formed on the upper interior surfaces
of the vessel and on the tray back into the main body of water.
Both the interior of the cover and upper surface of the tray
include "flow-ways" for such condensate designed to, with the
assistance of gravity, drain condensate back into the main water
body.
A further object of the invention is to provide a steam generating
means having special qualities of efficiency, effectiveness and
long life. We have through our arrangement been able to increase
greatly the total current field area while still avoiding buildups
of deposits which might otherwise provide a short circuit across
and between the electrodes.
Still another object of the invention is to provide a vessel of the
character described which includes means for introducing a hair
conditioning medium, for example, a lanolin preparation, or the
like, into the vapor contacting the rollers whereby to cause
deposit of such material on the rollers for subsequent transfer to
the hair.
A further object of the invention is to provide a heating unit for
hair curling rollers which is so constructed as to minimize to the
fullest extent possible the collection on or discharge of
condensate to the outside of the unit where it might otherwise drip
on the table or other surface on which the unit is supported. A
feature of the invention in this respect resides in the provision
of a liquid level control in the form of an overflow pipe having
control means for inhibiting steam discharge therethrough.
Still another object of the invention is to provide a heating unit
for hair curling rollers which includes a roller support tray which
can be rotated to position individual rollers at any selected
location with reference to a point on the rim of the unit so as to
facilitate their insertion and removal with minimal exposure of the
hand to the steam escaping and rising from the vessel. A related
feature of the invention lies in providing the unit with a circular
configuration and a hinged cover having handle means centrally of
the cover, both of which contribute to reduced steam exposure
during raising and lowering of the cover and the withdrawal and
reinsertion of rollers from and to the unit.
Other and further objects of the invention are to provide a unit
which includes as a part of its assembly a water measuring cup
which is storable within the vessel yet readily available for use
during filling, which is rugged in construction and capable of
withstanding years of use and which is completely safe to
operate.
Other and further objects of the invention together with the
features of novelty appertenant thereto will appear during the
course of the following description.
DETAILED DESCRIPTION
In the accompanying drawings which form a part of the specification
and are to be read in conjunction therewith, and in which like
reference numerals indicate like parts in the various views;
FIG. 1 is a generally front perspective view of a heating and
conditioning unit for hair curlers constructed according to the
preferred form of the invention, the cover being shown in the open
position;
FIG. 2 is a top plan view, on an enlarged scale, of the base of the
unit, the cover eliminated for purposes of illustration;
FIG. 3 is a top plan view, on a somewhat smaller scale, the
interior of the base of the unit with both the cover and curler
support tray eliminated;
FIG. 4 is a sectional view taken along the line 4--4 of FIG. 2 in
the direction of the arrows;
FIG. 5 is a sectional view, on the scale of FIG. 4, taken along
line 5--5 of FIG. 3 in the direction of the arrows; the cover in
this instance being shown in its proper closed relationship with
the base;
FIG. 6 is a fragmentary sectional view, on a greatly enlarged
scale, of the curler support tray separate and apart from the unit,
the view being taken generally along line 6--6 of FIG. 2 in the
direction of the arrows;
FIG. 7 is a fragmentary sectional view, on a greatly enlarged
scale, similar to FIG. 6 but taken generally along line 7--7 of
FIG. 2 in the direction of the arrows;
FIG. 8 is a fragmentary side elevation showing the condensing
baffle and hinge lugs on the outer side wall of the base of the
unit, being taken along line 8--8 of FIG. 2 in the direction of the
arrows;
FIG. 9 is a fragmentary sectional view, on an enlarged scale,
showing the details of the overflow outlet and steam discharge
control therefore, the view being taken generally along line 5--5
of FIG. 3 in the direction of the arrows; and
FIG. 10 is a plan view of the safety switch operating member shown
separate and apart from the unit.
Referring now to the drawings, and initially to FIG. 1, the basic
purpose of the invention is to provide a uniquely safe and
effective means for heating and conditioning hair curling rollers
prior to their placement in the hair of the user. As is well known,
such curler rollers are in widespread use. A conventional roller is
shown at 20. Typically they are cylindrical in configuration and
include projecting or radiating pegs or pins on the periphery which
facilitate both handling and the incorporation of the curling
rollers with the hair. The rollers are made of a material which has
good heat retention. The construction and composition of the
curling roller itself is not a part of the present invention, other
than in the context that the heating and conditioning unit is
principally designed for curling rollers of the general type
shown.
The main body of the preferred unit illustrated in the drawings
comprises a closed-bottom pan-like base 21 which is fitted with a
hinged cover 22. As can best be seen in FIG. 5 the upper edge of
the base and lower edge of the cover are oppositely rabbeted so as
to provide a telescopic coupling of the base and cover at the joint
between them when closed. The base is provided with side handles in
the form of wings 23 projecting on opposite sides from the base
near the upper edge thereof. Both the base and cover can be
constructed from any material having the strength to stand up under
the temperatures involved (the temperature of boiling water). We
prefer to mold both the base and cover from "Lexan" which is a
polycarbonate resin offered and sold by General Electric, "Lexan"
being the trademark applied to the material by General
Electric.
Referring now in more detail to FIGS. 3, 4 and 5, the flat inside
bottom wall 24 of the base is provided centrally with a rectangular
recess 25. Disposed generally within the borders of the recess are
a pair of cooperating electrode plates 26a and 26b. The plates are
arranged in vertically overlapping arrangement each plate having an
end secured by screws or rivets to a pair of upstanding posts 26c
rising from the base of recess 25 near the ends thereof. The posts
26c are preferably molded integral with the base unit. The lower
plate 26b extends outwardly in cantilever fashion from its support
posts and is provided with a break so that the outer portion is
inclined upwardly at a low angle, for example 3.degree. to
5.degree.. The upper plate 26a is provided with a relatively sharp
upward offset 26d and the outer portion overlies and essentially
parallels the upwardly inclined portion of the lower plate 26b. The
outer or free portions of the respective electrode plates terminate
well short of the fixed ends of their counterparts.
The spacing between the electrodes is enough to prevent arcing.
With stainless steel plates approximately 0.050 inches in thickness
we prefer a spacing of approximately one-eighth inch.
Each of the electrode plates 26a and 26b are provided with a
plurality of small openings 26e which in the present case are
arranged in a row along the major axis of the plates. One of the
openings is blocked by a space or disk 26f which is in the form of
a disk having a flat bottom resting on the upper surface of plate
26b and with a small dog or protuberance on the top surface which
is received in one of the holes in the upper plate 26a. The
protuberance permanently locate the disk and prevent it from
slipping out from between the plates. The thickness of the disk is
substantially equal to the desired spacing between the electrode
plates. The disk is made of material having good dielectric
properties as well as resistance to corrosion in a hot water
environment and may be any one of the conventional polymerized
resins such as the polycarbonate utilized for the base.
The electrode plates 26a and 26b are preferably rounded at the
corners of the free ends to promote free drainage of water. The
openings in the plates enhance the ready circulation of the
thermally agitated water and therefore quick and efficient heating
of the water to the boiling point. Moreover, sustained boiling is
also promoted through the combination of relatively wide area
electrodes with the openings therethrough and the angling of the
overlapping portions with respect to the horizontal.
The electrodes are secured to the posts 26c by screws or rivets
tapped into the upper ends of the posts and passing through
appropriate apertures in the electrodes. More will be said of these
later.
The electrodes are shielded from above by a circular plate-like
element 27. The element 27 is also molded from the polycarbonate
material referred to earlier. It is supported at four equal spaced
locations adjacent the periphery, two of the supports being in the
form of posts 28 extending above the bottom wall 24, and the other
two being tubular spacers 29 formed integral with and projecting
downwardly from the bottom of the plate 27 in alignment with one or
the other of the connection points for the electrodes 26a and 26b.
The connection is made by screws 30 to secure the plate to the
opposed posts 28 while screws 31 extend down into the spacers 29
through the bottom wall thereof through the electrodes and into the
respective electrode support post 26c.
In addition to providing a shield from above for the electrodes 26,
the plate 27 provides a central bearing support for a hair curling
roller storage and dispensing tray 32, further details as to the
construction of which will be provided at a later point herein. As
best seen in FIG. 5, the bearing support for the tray consists of
an upperly projecting boss 33 on the plate 27, the boss having
reduced diameter portion 33a at its upper end. The boss is axially
tapped from above to provide a threaded bore 33b. In order to
strengthen the plate against flexure, radially oriented ribs 34
extend outwardly from the boss on the upper surface of the
plate.
The tray 32 has an imperforate bottom wall 35 having a center
opening 36 (see FIGS. 6 and 7) of substantially the same but
slightly greater inside diameter than the outside diameter of the
reduced portion 33a at the upper end of the boss 33. The opening 36
is sleeved over the reduced portion 33a and the tray thus has
bearing support on the horizontal shoulder formed between reduced
portion 33a and the main part of boss 33. The tray is secured to
the boss by a screw 37 (see FIG. 4) which is received in the
threaded bore 33b and the boss.
The upper surface of the tray 32 is provided with a plurality of
arcuate baffles which serve to define a plurality of annular
channels, two channels for receiving curlers 20 and an inner
channel adapted to receive the edge of an inverted water cup 38
which when the unit is not in use is stored therein (see FIG.
4).
The outermost baffle ring 39 forms the outer rim of the tray. The
dimensions are such that the outside all of the baffle ring 39
preferably is spaced slightly away from the inside wall of the
vessel so as to provide a passage through which steam can move from
below the tray to the upper portion of the vessel. The spacing
should not however be greater than necessary as it is highly
important that as few as possible access openings from above the
tray to the space below the tray be provided.
Spaced inwardly from baffle ring 39 is baffle ring 40 which defines
with ring 39 an annular channel adapted to receive up-ended curling
rollers 20 as illustrated. The widthwise dimension of the channel
need only be slightly greater than the maximum outside diameter of
the curler. Preferably it will be held within fairly close
tolerances in order to provide support in at least one direction
against tipping of the rollers.
A third baffle ring 41 defines with ring 40 another channel similar
to the outer channel and for the same purpose. Spaced inwardly of
ring 41 is the final baffle ring 42 which forms the rather narrow
annular channel earlier described for receiving the inverted cup 38
during storage of the latter when the unit is not in use. This is
illustrated in FIG. 4.
It will be noted that each of the baffle rings is interrupted at
equally spaced points around the ring by vertical slots 39a, 40a,
41a and 42a respectively. The slots are included to promote free
circulation of steam into and through the channels so that all
areas of the curler roller will be immediately contacted and
exposed to steam. Another purpose served by the slots is to permit
outward flow of condensate through the baffle rings toward the
edges of the tray for return to the space below the tray.
The flow of condensate is promoted by the provision on the upper
surface of the tray of a plurality of radial grooves 43 which are
coincident with the vertical slots in the baffle rings. The grooves
43 increase in depth proceeding from the inner ends toward the
outer ends and thus present surfaces inclined from the horizontal
which promote gravity flow of condensate outwardly toward the rim
of the tray. As can best been seen in FIGS. 6 and 7, the ends of
grooves 43 terminate as at 43a flush with the inside wall of baffle
39.
Not only do the grooves 43 proceed through the baffles 41, 40 and
39, they also serve to interrupt a group of ring-like raised ribs
44 which are interposed in and project upwardly from the floor of
the annular channels in which the rollers are stored. There is thus
no resistance to outward flow of water or condensate in the
channels and a clear path is therefore provided for initial
introduction of water to the unit or return of condensate as it
develops during operation.
Located centrally of the support tray and removably carried thereby
is a circular tube-like element 45 which forms a part of a
dispensing chamber for hair conditioning material. The lower end of
tube 45 is received within the innermost baffle ring 42, which
serves to support it against tipping. The upper end supports the
tapered cup-like chamber 46 into which the hair conditioning
material can be placed.
The conditioner receiving cup or chamber 46 is provided at its base
with a small opening 46a and near its upper edge with a plurality
of openings 46b which communicate between the interior of the cup
46 and the annular space between the outer wall of cup 46 and the
inner wall of element 45. The openings 46b are arranged uniformly
around the upper end portion of the cup.
Access of steam to the open lower end of the tubular element 45 is
provided by supporting the lower end above the upper surface level
of the tray 32. To this end a plurality of small raised bosses 47
are spaced around the base of the central baffle ring 42. In the
preferred embodiment, there are four such lugs or bosses 47. As
indicated in FIG. 2, they are wall spaced from one another so that
there are openings between the top surface of the tray and the
bottom edge of tube 45 through which steam can enter and circulate
upwardly through the interior of tube 45. Also, and as will be
subsequently described, the openings between lugs 47 provide a
discharge path for both condensate and conditioning material from
inside the tube 45 toward the edge of the tray.
We have previously referred to our desire to minimize direct access
to the space below the tray from above the tray. This desire is
prompted principally by the wish to minimize, if not prevent
entirely, any possibility of elongate electrically conductive
objects such as a needle or hair pin being inadvertently pushed
downwardly through or past the tray and into contact with the water
contained in the lower part of the vessel. To this end we have
provided below the outer rim of the tray an inturned horizontal
ledge or shelf 48 which is of greater width than the distance
between the outer surface of the outermost baffle ring 39 and the
interior wall of the base 21. In addition, we have provided a short
depending ring 49 on the underside of the tray so as to provide as
sharp a turn as possible into the main part of the water receiving
area from above the tray so that it is no easy matter, if possible
at all, to insert any electrically conductive materials downwardly
around the rim of the tray. Of course the tray itself is
imperforate and there is no way at all that any thing can pass
through it.
The electrical energy for the electrodes 26 is supplied from a
conventional 110 volt A/C source. A lead for each electrode 26a and
26b is run downwardly through one of the support posts 26c
therefore and terminates in an exposed contact 50 on the underside
of the base 21. There are two such contacts and they are located at
opposite ends from the electrode assembly. Electric connections
with contacts 50 is made through a generally T-shaped switch member
51 which is illustrated in plan in FIG. 10. This member is formed
of a resilient plastic and carries contacts 52 at the opposite
ends. The head of the T underlies and is generally parallel with
the long direction of the electrode. Contacts 52 are wired to the
two conductors 54 which go outside the unit and form part of a
conventional appliance electric cord terminating in the usual plug
(not shown). The end of the stem 51a of the T-member 51 is secured
to a mounting post 55 which is preferably made integral with and
extends downwardly from the bottom of the base. The lower side of
the T carries a plunger 56 which passes loosely through an opening
57 in a bottom closure plate 58. Closure plate 58 defines with a
ring-like projection 59 on the bottom of the base a chamber within
which the T is located.
The base includes four downwardly projecting and equally spaced
legs 60 which are adapted to rest on a table or other horizontal
support surface. With the unit raised off the surface, i.e., not
supported on the legs, the plunger 56 and T will assume a lowermost
position in which the contacts 52 are disengaged from and spaced
sufficiently far from contacts 50 as to prevent any current from
flowing to the electrodes. At this time the lower end of plunger 56
is below the plane of the lower ends of legs 60. When the unit is
placed on the surface, the plunger 56 is thus forced upwardly and
contacts 52 are automatically engaged with the electrode contacts
50 thereby completing the circuit. Of course, this does not
necessarily mean that the power will go on since a conventional
switch could be included in the power cord if desired. However,
with the switch on, and with the unit resting on the support
surface, current will flow to the electrodes. However, should the
unit be tipped in any direction it will only take a small amount of
tipping to free up plunger 56 sufficiently to cause the T-member to
break the contact.
While resilient stiffness of the stem 51a alone may be relied upon
to provide the biasing of the contacts 52 away from contacts 50,
this can be supplemented if desired by a coil spring 61 interposed
between the T-member 51 and lower surface of the base.
Referring now back to the interior of the base 21 of the unit, and
with particular reference to FIGS. 3 and 9, an overflow type liquid
level control is included on the inside bottom of the base. This
comprises an open standpipe 62 which registers with and forms a
continuation of a vertical passageway 62a through the bottom wall
of the base. The distance the top edge of the standpipe is spaced
above the bottom wall determines the maximum stabilized depth the
liquid can assume in the base. To inhibit excess discharge of steam
through the overflow pipe, a light weight buoyant cap 63 has its
lower end loosely fitted around the pipe with the dome of the cap
over the open upper end of the pipe. An arcuate guide baffle 64
extends upwardly around and is spaced from the pipe and the cap is
loosely retained therein for limited up and down movement. The
baffle 64 has its ends spaced on the inside wall of the base so
that water can flow freely past the baffle around the pipe.
The cap 63 is preferably made of polyurethane foam or any other
suitable highly buoyant material. The inside diameter at the bottom
end is as close to the outside diameter of the pipe as can be
achieved while still permitting it to float freely upward in the
event the water level rises above the top of the overflow pipe. The
dimensions of the cap are such that with the water at the normal
level (just at or slightly below the upper edge of the overflow
pipe) the cap substantially covers the pipe. A small pin hole 63a
is provided in the dome of the cap so any sustained steam pressure
buildup will be promptly relieved. The pin hole 63a will not permit
steam to discharge as rapidly through the overflow pipe as would be
the case if the cap 63 where not present, and so while there still
is a steam path through the overflow pipe when the cap is closed it
is an extremely restricted one which results in no appreciable
steam loss upon brief surges of pressure, as might be occasioned
upon closing of the cover nor any resulting condensation on the
outside of the unit which might otherwise drip on the support
surface.
Steam is freely vented from the upper portion of the base when the
cover is closed through an opening 65 cut in the upper edge of the
upright wall of the base. The opening 65 is screened from the
outside by an inclined baffle 65a which intersects and is secured
to the outside wall of the base and forms an arcuate intersection
line 66 on the outside wall. The baffle 65 and the short upstanding
portion of the outside base wall below the edge of the opening 64
form a chamber of generally V-shaped cross section in which
condensate forming on the inside of baffle 65 will be trapped.
Notches 67 are formed at the opposite ends of this chamber to
permit the condensate to drain back into the interior of the unit,
the drainage being promoted by the curvature of the intersection
line 66.
The end walls of the condensate trapping chamber heretofore
described are formed by the cover mounting lugs 68 which are
secured to and project outwardly from the outside wall of the base.
These lugs are provided with openings which register with similar
openings formed in comparable lugs 69 on the cover and rivets or
other suitable connecting pins are used to join the respective lugs
together for pivotal mounting of the cover.
The inside top all 22a of the cover is preferably frusto-conical in
configuration with the highest point toward the center. Also the
cover is provided with a radial pattern of striations forming
alternating ridges and grooves of V-section, as shown in FIG. 1.
The pattern of ridges and grooves is to promote condensation and
gravity flow of condensate back toward the rim of the cover in a
generally radial path so that the condensate will then proceed
downwardly adjacent the rim of the base and down past the tray 32
into the lower portion of the vessel. On the outer surface of the
cover at the center is located a circular handle 70 by which the
cover may be opened and closed as desired.
In the operation of the unit, it is first prepared for operation by
depositing water in the base. This preferably is accomplished
through the use of the filling cup 38 which is so dimensioned as to
contain the exact amount of water which will bring the level in the
base up to just short of the top of the overflow pipe 61. If
desired, hair conditioning material, such as is readily available
on the market, is placed in the chamber 46 of the central member
45. The tray 32 is filled, if they are not already present, with
curler rollers 20, the rollers being carried into annular rows in
the channels heretofore described. The cover is closed, the
electric appliance cord plugged into an accessible outlet, and the
switch turned on in order to energize the electrodes.
The electrodes will in due time cause sufficient heating of the
water in the vicinity of the electrodes to bring it to a boil
thereby releasing steam to the interior of the unit. The steam
proceeds upwardly rising around the outside rim of the tray 32 into
the upper portion of the vessel, and contacts the rollers 20. Any
condensate forming on the inside dome 22a of the cover 22 or on the
tray parts will in due course be guided by ridges and grooves in
the cover or by the grooves 43 in the base back to the outside rim
of the cover where it will flow downwardly back into the lower
portion of the base. The steam also will flow in the manner earlier
described into and around the receptacle 46 carrying the hair
conditioning material thereby entraining it in part and in part
causing it to flow downwardly through the opening 46a in the bottom
of the receptacle to merge with condensate flowing into the base.
The hair conditioning material is thus introduced into the
condensate and into the liquid reservoir in the vessel and at the
same time has a portion of it vaporized to be carried into contact
with the hair curling rollers.
When the curlers have been sufficiently heated and conditioned,
which normally will take from 2 to 5 minutes, the cover is raised
and the roller removed.
It should perhaps be noted at this juncture that for best operation
the unit should be placed directly in front of the user with the
unit turned sidewise so that the hinge is at either the right (for
right-handed persons) or at the left (for left-handed persons). In
this manner, the user can by grasping the top located handle on the
cover open the cover without any danger of being exposed to
escaping steam rising around the rim of the cover. A curler roller
can then be taken from the nearest point. As curlers are removed,
the tray can be rotated so that rollers can always be taken from a
point closest to the user.
In the event the unit is accidentally tipped while the electric
cord is still connected and the switch is on, the contact will be
broken through release of the safety switch plunger 56 from its
contact with the supporting surface.
When curling has been completed, the curler rollers can be returned
to the unit for storage as can be water measuring cup 38. The cup
38 is simply inverted and slipped over the top of the center 45 as
shown in FIG. 4.
From the foregoing, it will be seen that this invention is one well
adapted to attain all of the ends and objects hereinabove set forth
together with other advantages which are obvious and which are
inherent to the structure.
It will be understood that certain features and subcombinations are
of utility and may be employed without reference to other features
and subcombinations.
As many possible embodiments may be made of the invention without
departing from the scope thereof, it is to be understood that all
matter herein set forth or shown in the accompanying drawings is to
be interpreted as illustrative and not in a limiting sense.
* * * * *