US2387281A - Steam iron - Google Patents

Steam iron Download PDF

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Publication number
US2387281A
US2387281A US452704A US45270442A US2387281A US 2387281 A US2387281 A US 2387281A US 452704 A US452704 A US 452704A US 45270442 A US45270442 A US 45270442A US 2387281 A US2387281 A US 2387281A
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Prior art keywords
soleplate
steam
iron
heating
water
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US452704A
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Eldred O Morton
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CBS Corp
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Westinghouse Electric Corp
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00Hand irons
    • D06F75/08Hand irons internally heated by electricity
    • D06F75/10Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/14Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron
    • D06F75/18Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron the water being fed slowly, e.g. drop by drop, from the reservoir to a steam generator

Description

UcLZB, 1945. E. o. MORTON STEAM IRON Filed July 29, 1942 INVENTOR E LDRED QMORTON.

ATTORNEY Patented Oct. 23., 1945 mrr.

smart men Eldreol 0. Morton, Mansfield, Qhio,

Westinghouse Electric Corporation,

assignor to East Pittsburgh, Pa, a corporation or Pennsylvania Application July 29, 1942, Scrial No. 452,704

7 Claims.

This invention relates to steam irons, and particularly to that class of steam irons known as the flash-boiler type, which include a steam generator and a valve controlled water supp y and it has for an object to provide an improved steam iron of the character set forth.

In steam irons of this class, water is fed to a steam generator, preferably located in the soleplate, at a rate which allows the water to be flashed almost instantly into steam. The generated steam is distributed to thematerial being ironed or steamed by means of ports or the like which communicate with the steam generator and open on the ironing surface of the soleplate. Irons of this type are usually provided with thermostatic means responsive to the temperature of the soleplate and adjustable to maintain the soleplate at a temperature selected in accordance with the material to be pressed or ironed. In the so-called dry iron, the'manner of arranging the thermostat and the soleplate heating element to obtain correct temperature control and a uniform distribution of heat throughout the soleplate is a relatively simple problem in that the major loss of heat from the soleplate is that extracted by the damp material being pressed, which engages the entire under-surface of the soleplate. It will be appreciated, however, that when a steam generator is incorporated in the soleplate and heated by the same heating element which heats the ironing surface of the soleplate, a second major heat loss is encountered, that is, the

heat necessary to vaporize the water in the steam generator. 1 I

It is, therefore, an object of this invention to provide an emcient steam iron, which may be used either as a dry iron or as a, steam iron, having a substantially uniform distributionof heat throughout the ironing surface of the soleplate and also capable of accurate temperature control regardless of whether the iron is being used as a "dry iron or as a steam iron.

It is a further object of the invention to provide an improved steam iron construction in which the temperature control means therefor responds quickly to changes in temperature of the soleplate.

Another problem encountered in this class of steam irons is that of obtaining sumcient volume in the steam generator and evaporating surfaces therein to prevent water from being carried out through the steam discharge ports. Further, by providing a maximum evaporating surface in the steam generator, the tendency for lime or scale to build up in a concentrated region in the steam generator to a point where it will affect the operation of the iron as a steam iron is materially reduced. From this, it follows that the iron may be used for longer periods without the necessity of cleaning such lime or scale from the steam generator.

These and other objects are efiected by my in vention as will be apparent from the following description and claims taken in connection with the accompanying drawing, forming a part or this application, in which:

Fig. 1 is a vertical longitudinal section of a steam iron made in accordance with the present invention;

Fig. 2 is a plan view of the soleplate of the iron illustrated in Fig. 1;

Fig. 3 is a transverse section taken substantially on the line llL-DI of Fig. 2; and,

Fig. 4 is a bottom plan view of a cover plate for the soleplate. f

The steam iron, generally indicated Iii, illustrated in the drawings is preferably electrically heated and comprises a metallic soleplate ii, a sheet metal cover or shell member l2 and a, plastic or wood handle it, which are secured together in any suitable manner. The interior of the cover is provided with a partition M which, together with the side and top walls thereof, defines a water storage chamber or reservoir it.

The reservoir i5 is supplied with water through a fill tube it which may be brazed or otherwise secured in fluidtight relation in the topwall of the cover it. This fill tube extends through an opening in the rear part of the handle l3. A flanged bushing ii is screw-threaded on the tube and engages a shoulder it provided in the mentioned opening in the handle to secure the rear part of the handle to the cover. The fore part of the handle may be secured to the cover E2 in any suitable manner (not shown). I

The upper end of the fill tube i6 is normally closed by means of a cap l9 having a gasket 2| which seats against the flange of the mentioned bushing ll. This cap is biased into closed position by means of a tension spring 22. secured at one end to a lug 23, formed on the undersurface of the cap, and to a wire clip 24 at the other end thereof. This clip engages the lower end of the fill tube It. The cap it may be pulled away from thefill tube to permit the reservoir to be filled or emptied by inserting a fingernail under the tapered edge of the cap at the point 25.

The metallic soleplate l l is detachably secured in any suitable manner to the bottom of the cover l2 and preferably in spaced relation to the partition It to at least partially thermally insulate nation of water The heating element is preferably cast into me soleplate and may be of well-known construction, and comprises an outer metallic-tubeor sheath 2| having a coiled resistance element 29 supported in spaced concentric relation thereto by means of suitable highly compacted, heat-conducting, electrical-insulating material.

Power for heating element 21 by adapted to be brackets 32, fixed, to the top wall of the cover II. The conductors are insulated from these brackets extending through the rwervoir I! and brazed or otherwme secured in iluidtight relation to the heating element 21 in series with a menu justable may be of any desired construction.

'Ihe thermostat is positioned substantially centrally of the soleplate within the bight of the U- shaped heating element in a well 35 provided within the space between the arms of the heating element. The thermostat well is defined by a partition or wall 38, preferably formed integral with the soieplate.

The wall 3!. together with the raised portion of the soleplate overlying the heating element. defines channels 38 which extend continuously along the heating element. These channels, as will appear later, serve to complete the vaporiand to conduct steam from a steam generator 33. provided in the region of the heel of the soleplate. These channels have the added function or more or less isolating the thermostat from ally-ading element 21.

The steam generator 33 is formed by an opening extending through the soleplate and with which the channels 38 communicate. This recess is closed at its lower end by means of a removable annular disc or plug 40 which is received in an enlarged portion of the mentioned recess. The central opening in this plug receives a headed member I! or other suitable means for engagement of a member ll is threaded onto a bushing 43 having a central passage 44 thereconnects the water reservoir with the steam-generating space 39, as will appear later. l

The bushing 43 is threaded into the lower end of a tubular'strut' 4! which is preferably brazed or otherwise secured in i'luidtight relation to the upper and lower walls of the water reservoir. 43 hasclamped thereto. as by means of a nut I! and a cooperating shoulder 41 formed thereon. an annular thin metal disc 48 which serves to close the top 01' thefsteam-generating space 39. This disc 48 is seated in an enlarged portion or an opening 49 provided in a cover plate and pass through a tube 33' thermostat, generally indicated 34, whichover the heating element at openings 51 in the cover plate .8! (Fig. 4), and is preferably made oi. relatively poor heat-conducting metal to retard the ilow of heat from the hot soleplate to the bushing member 41 and thereby reduce or prevent vaporization of water in the passage N of the bushing.

The cover plate it is sive with th carried along the channels 38 to pass upwardly the toe of the iron into the mentioned recess" 52 and then down provide a fluidtight joint and prevent the escape of steam, except through ports [3, from the steamgenera lng Space 39 and the channels 38. The cover plate may be clamped to the soleplate by means of a plurality of screws 56 receivable in and threaded into the soleplate.

As mentioned, water is supplied to the steamgenerating space 39 from the waterreservoir it;

through the passage ll provided in the bushing member 43. The rate at which the water is fed to the steam generator is controlled by means 01' a valve stem 53 having an adjustable connectlon, as indicated at 59, with the strut ii. The lower end of this valve stem is tapered and is engageable with a valve seat 8| formed in the bushing to cut oil the flow of water to the steam generator and is adjustable relative to tilt valve a steam generator, a-vent is water reservoir to insure a seat to throttle the flow 01' water to the steam generator. The upper end 01' the valve stem 58 extends through a suitable packing gland 62 and is provided with a for manipulating the valve stem. This knob may be provided with a rate of water flow to of r the particular setting therein order to equalize the steam generator 39 and the pressures within the channels 38 and the continuous flow, by gravity, of water from the water reservoir to the provided in the form of a tube 64 which communicates with the chan-' nels 38 at their Junction and with the interior of the water reservoir above the normal liquid level thereof. The construction 01' this vent may be in accordance with that disclosed in my copending application bearing Serial N0. 433,701 and filed March 7, 1942, for Steam irons and assigned to the assignee of the present application.

The vent tube 64 is preferably brazed or otherwise secured in fluidtight relation to the partition I of the water reservoir and extends in fluidtight relation through an opening 65 provided in the cover plate 5|. The upper end of the tube projects within a recess 86 provided in the handle. A cap member or steam dome 61 also extends into this recess about thetube l4 and is brazed or otherwise secured in fluidtight relation to the cover ii. A baflle plate 68 having openings 69 therein may be provided about the tube M to prevent water from accidentally splashing up into the vent tube as the iron is moved to and fro over the material being pressed.

permitsthe steam Operation To use the iron as a dry iron, it is only necessary to connect the conductors 3| to a suitable source of electricity, household convenience outlet, and adjust the thermostat 34 by means of a lmob H. -'I'his'knob is connected to the thermostat by meansof a rod 12 extending through a sleeve 13 secured in fluidtight relation to the upper and lower walls of the water reservoir; conventional .dry iron, the water-valve'knob $3 is left at its 011" position so that water will not enter the steam-generating space 39.

When it is desired to use the iron as a steam iron, to moisten or dampen the clothes while ironing, the operator turns the water valv knob 63 to the desired setting amount of steam for the particular material being ironed. It is, of course. assumed that the water reservoir has been filled with water and the soleplate is up to its selected temperature. With the valve stem 58 raised from the valve seat 6!, the water in the reservoir flows through openings it provided in the strut 65 into the passage 66 and falls in the center of the screw member M from' which it can flow into the steam-generating space 39 through openings '15. Since the plug 58) is'in In using the .iron as asuch as. the conventional to provide the correct direct contact with the hot soleplate, the waterwill be flashed almost instantly to steam and will flow along the channels 38 to the fore part or toe of the iron. In the event that the water is not completely vaporized in the steam-generating space 39, further heat will be rapidly added to the water as it moves along the channels 38, since the channelsare closely adjacent the heating element 21, and complete vaporization of the water will be obtained. When the steam reaches the fore part of the iron it passes up into the recess 52 in the cover plate and then down through the ports 53 to the material being pressed.

As the iron is used, there may be an accumulation of lime or scale deposited on the plug ti! and within thecentral recess of the screw member M. This may be readily cleaned therefrom by removing the screw and the plug. Removal of these parts also provides access to the rear part of the channels 38 so that any therein may be cleaned.

It will be appreciated that very little deposit will accumulate in the fore part of the channels since the water will be vaporized by the time it I reaches the forward end of the iron. However, if

desired. the plug member so may extend for-. wardly to form the bottom wall of a portion of the channels 38 so that on removal of the plug member a substantial portion of the channels is exposed.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and-modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are specifically set forth in the appended claims.

What I claim is:

l. A steam iron comprising a soleplate. a U- shaped heating element carried by said soleplate and arranged with the bight thereof directed toward the front end of said soleplate, said soleplate having a steam-generating space formed therein adjacent the rear end thereof, means for supplying water to said space, a thermostat well formed in said soleplate within the bight of said heating means, a U -shaped passage provided in deposits formed ing in said steam-generating space whereby steam generated within said space may pass along said passage to the front end of said soleplate, and means adjacent the front end of said iron communicating with said U-shaped passage for discharging steam from. said passage to the material being pressed.

2. A steam iron comprising a soleplate, a steam generator carriedby said soleplate and located adjacent the rear end thereof, means for supplying water to said steam generator, electrical means for heating said soleplateand said steam generator, said heating means extendingjrom the rear to the front end of said soleplate along the sides thereof, thermostatic means mounted on said soleplate adjacent thelower surface thereof for controlling said electrical heating means, a passage communicating at one end with said steam generator and extending toward the front end of the soleplate closely; adjacent said heating means and in good heat-receiving relation thereto, said steam generator and passage being disposed horizontally between said thermostatic means and said heating means and limiting the direct conduction of heat from said heating means to said thermostatic means, and means at the front end of said iron communicating with said passage for discharging steam from said passage to the material being pressed.

3. A steam iron comprising a soleplate, a heating element carried by said soleplate, a thermostat mounted, substantially centrally of said soleplate, a steam-generator provided adjacent the rear of said soleplate, means for supplying water to said steam generator, passage means formed on said soleplate and extending from said steam generator to the forward end of said soleplate, said passage means together with said steam generator substantially circumscribing said thermostat, said heating means, thermostat, passage means and steam generator being disposed in substantially a common plane with the passage means and steam generator located between said heating means and thermostat, and means for discharging steam from said passage means to the material being pressed.

4. A steam iron comprising a soleplate, electrical heating means for said soleplate extending from rear to front adjacent the side edgestliereof, thermostatic means mounted substantially centrally on said soleplate for controlling said heating means in response to the temperature of said soleplate, a steam generator carried by said soleplate, means for supplying liquid to said steam generator, passage means provided in said soleplate and communicating with said steam generator for receiving steam therefrom, means for discharging steam from said passage means to the material to be pressed, said passage means and steam generator being disposed between said heating means and said thermostatic means and substantially circumscribing said thermostatic means for restricting the direct conduction of heat from said heating means to said thermostatic means.

5. A steam iron comprising a soleplate, a substantially U-shaped electric heating element of the sheathed type imbedded in said soleplate with the bight thereof directed toward the front end of said soleplate and with the arms thereof ex.-

. the sheathed element being disposed in substantially a common plane, means for supplying a liquid to be vapormed to a portion of said passage and means communicating with another portion of the passage for conducting steam generated within said passage to the material to be pressed.

' 6. A steam iron comprising a soleplate, a substantially U-shaped electric heating element of ype imbedded in said soleplate with the bight thereof directed toward the front end of said soleplate and with the arms thereof extending rearwardly therefrom adjacent the side edges of the soleplate. said soleplate having a thermostat-receiving well therein disposed between and in spaced relation to the arms of the heating element, thermostatic means in said well for controlling said heating element, said sole- Dlate having said heating a passage formed therein betweenthe soleplate, said ass-1,281

mon plane. means for rearwardly therefrom adjacent the side edges of soleplate having a thermostatreceivlng well therein disposed substantially centrally of said plate between the arms of the heating element, said soleplate also having a, recess or recesses therein conducting said steam to said ports.

ELDRED O. MORTON.

US452704A 1942-07-29 1942-07-29 Steam iron Expired - Lifetime US2387281A (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475572A (en) * 1948-01-27 1949-07-05 Edward P Schreyer Electric steam iron
US2499184A (en) * 1946-09-11 1950-02-28 Gen Electric Steam generating electric pressing iron
US2506950A (en) * 1945-10-01 1950-05-09 Louis S Butman Automatic steam electric sadiron
US2520360A (en) * 1946-10-18 1950-08-29 Westinghouse Electric Corp Flash type steam iron
US2527409A (en) * 1946-05-31 1950-10-24 Wilfred E Ellinwood Tank for steam irons
US2582773A (en) * 1946-09-11 1952-01-15 Gen Electric Soleplate structure for electric steam irons
US2589921A (en) * 1945-12-19 1952-03-18 Reginald G Boardman Electric steaming iron
US2609625A (en) * 1948-02-17 1952-09-09 Winsted Hardware Mfg Company Thermostatically controlled electric iron for dry and steam ironing
US2618875A (en) * 1948-05-27 1952-11-25 Sunbeam Corp Steam iron
US2683320A (en) * 1948-11-05 1954-07-13 Westinghouse Electric Corp Steam iron
US2690623A (en) * 1948-05-27 1954-10-05 Sunbeam Corp Steam iron
US2700236A (en) * 1950-06-16 1955-01-25 Bock & Co Electric steam iron
US2813358A (en) * 1948-05-27 1957-11-19 Sunbeam Corp Steam iron
US2853814A (en) * 1956-12-27 1958-09-30 Morris D Brandler Steam iron
DE1082220B (en) * 1957-06-19 1960-05-25 Gen Electric Steam Iron with liquid atomizer
DE1087107B (en) * 1956-07-25 1960-08-18 Thomson Houston Comp Francaise Steam Iron with drip vaporizer
DE1155085B (en) * 1955-10-10 1963-10-03 Proctor Mfg Corp Steam iron
US3162963A (en) * 1963-02-25 1964-12-29 Knapp Monarch Co Steam iron
DE1219901B (en) * 1963-03-12 1966-06-30 Robot A G Steam iron
DE3715059C1 (en) * 1987-05-06 1988-08-18 Rowenta Werke Gmbh steam iron
US5170577A (en) * 1990-07-20 1992-12-15 Seb S.A. Electric steam iron comprising a plate grouping together the regulating elements
DE10224549A1 (en) * 2002-05-31 2003-12-18 Braun Gmbh Steam iron
US20060042133A1 (en) * 2003-07-11 2006-03-02 Sylvain Maudhuit Iron comprising a water water reservoir which is provided with a filling orifice on the rear face of said iron
US20060086012A1 (en) * 2003-07-11 2006-04-27 Christian Giovalle Laundry iron comprising a water reservoir provided with a filling hole at the rear end of the iron

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506950A (en) * 1945-10-01 1950-05-09 Louis S Butman Automatic steam electric sadiron
US2589921A (en) * 1945-12-19 1952-03-18 Reginald G Boardman Electric steaming iron
US2527409A (en) * 1946-05-31 1950-10-24 Wilfred E Ellinwood Tank for steam irons
US2499184A (en) * 1946-09-11 1950-02-28 Gen Electric Steam generating electric pressing iron
US2582773A (en) * 1946-09-11 1952-01-15 Gen Electric Soleplate structure for electric steam irons
US2520360A (en) * 1946-10-18 1950-08-29 Westinghouse Electric Corp Flash type steam iron
US2475572A (en) * 1948-01-27 1949-07-05 Edward P Schreyer Electric steam iron
US2609625A (en) * 1948-02-17 1952-09-09 Winsted Hardware Mfg Company Thermostatically controlled electric iron for dry and steam ironing
US2618875A (en) * 1948-05-27 1952-11-25 Sunbeam Corp Steam iron
US2690623A (en) * 1948-05-27 1954-10-05 Sunbeam Corp Steam iron
US2813358A (en) * 1948-05-27 1957-11-19 Sunbeam Corp Steam iron
US2683320A (en) * 1948-11-05 1954-07-13 Westinghouse Electric Corp Steam iron
US2700236A (en) * 1950-06-16 1955-01-25 Bock & Co Electric steam iron
DE1155085B (en) * 1955-10-10 1963-10-03 Proctor Mfg Corp Steam iron
DE1087107B (en) * 1956-07-25 1960-08-18 Thomson Houston Comp Francaise Steam Iron with drip vaporizer
US2853814A (en) * 1956-12-27 1958-09-30 Morris D Brandler Steam iron
DE1082220B (en) * 1957-06-19 1960-05-25 Gen Electric Steam Iron with liquid atomizer
US3162963A (en) * 1963-02-25 1964-12-29 Knapp Monarch Co Steam iron
DE1219901B (en) * 1963-03-12 1966-06-30 Robot A G Steam iron
DE3715059C1 (en) * 1987-05-06 1988-08-18 Rowenta Werke Gmbh steam iron
US4920668A (en) * 1987-05-06 1990-05-01 Rowenta-Werke Gmbh Steam iron with pressure equalization conduit
US5170577A (en) * 1990-07-20 1992-12-15 Seb S.A. Electric steam iron comprising a plate grouping together the regulating elements
US6745504B2 (en) 2002-05-31 2004-06-08 Braun Gmbh Steam iron
DE10224549A1 (en) * 2002-05-31 2003-12-18 Braun Gmbh Steam iron
US20060042133A1 (en) * 2003-07-11 2006-03-02 Sylvain Maudhuit Iron comprising a water water reservoir which is provided with a filling orifice on the rear face of said iron
US20060086012A1 (en) * 2003-07-11 2006-04-27 Christian Giovalle Laundry iron comprising a water reservoir provided with a filling hole at the rear end of the iron
US7096611B2 (en) * 2003-07-11 2006-08-29 Seb S.A. Iron comprising a water reservoir which is provided with a filling orifice on the rear face of said iron
US7114273B2 (en) * 2003-07-11 2006-10-03 Seb S.A. Laundry iron comprising a water reservoir provided with a filling hole at the rear end of the iron
AU2004263695B2 (en) * 2003-07-11 2009-11-26 Seb S.A. Iron comprising a water reservoir which is provided with a filling orifice on the rear face of said iron
AU2004263694B2 (en) * 2003-07-11 2010-04-01 Seb S.A. Laundry iron comprising a water reservoir provided with a filling hole at the rear end of the iron

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