US2520360A

US2520360A - Flash type steam iron

Info

Publication number: US2520360A
Application number: US704062A
Authority: US
Inventors: Earl K Clark
Original assignee: Westinghouse Electric Corp
Current assignee: CBS Corp
Priority date: 1946-10-18
Filing date: 1946-10-18
Publication date: 1950-08-29
Anticipated expiration: 1967-08-29

Description

Aug. 29. 1950 E. K. CLARK 2,520,360

FLASH TYPE STEAM IRON Filed Oct. 18, 1946 WITNESSES: INVENTOR 2a Z EARL 1(- CLARK. d5. :14. m BY??- 1 L15 M j A T TORNEY Patented Aug. 29, 1950 2,520,360 FLASH TYPE STEAM IRON Earl K. Clark, Mansfield, Ohio, assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Application October 18, 1946, Serial No. 704,062

4 Claims.

ended position.

This invention relates particularly to the type of steam iron generally known as a flash type iron, wherein liquid admitted to a heated vaporizing chamber in the iron is rapidly vaporized and then delivered through one or more orifices in the soleplate to the material being pressed. Such irons include, generally, a heated soleplate, a reservoir for liquid superimposed upon the soleplate, a vaporizing chamber formed within the soleplate, a valve controlling th flow of liquid from the reservoir to the vaporizing chamber and a heel rest for supporting the iron in upended position during inactive periods. During inactive periods, it is desirable that the vaporizing of liquid be terminated for obvious reasons and, heretofore, it has been proposed to dispose the valve and the vaporizin chamber adjacent the front or toe end of the iron so that they are elevated with respect to the level of liquid in the reservoir when the iron is up-ended. Accordingly, the delivery of liquid through the valve to the vaporizing chamber is terminated and vaporization is stopped when the iron is up-ended.

In accordance with my invention, I provide an improved steam iron wherein the vaporizing chamber is spaced rearwardly from the toe and is heated by the heel portion of the soleplate. I have found that th soleplate may be more desirably heated when the vaporizing chamber is disposed remote from the toe, regardless of the amount of liquid being vaporized. This region of the soleplate is, however, at a lower elevation than the level of liquid in the reservoir when the iron is up-ended. In order to preclude the delivery of liquid from the reservoir, I provide a conduit within the iron structure having its discharge end communicating with the vaporizing chamber and its inlet end disposed in a region of the reservoir which is elevated with respect to the level of liquid in the reservoir when the iron is up-ended. A valve controlling flow ofliquid to the vaporizing chamber during operation of the iron is suitably disposed in the conduit.

A further object of this invention is, therefore, to terminate the delivery of liquid from the reservoir to the vaporizing chamber of a steam iron when the latter is up-ended, said steam iron having its vaporizing chamber disposed in a region of the soleplate remote from the toe thereof and at an elevation lower than the level of the liquid in the reservoir when the iron is up-ended.

The foregoing and other objects are effected by my invention as will be apparent from the following description and claims taken in connection with the accompanying drawing, forming a part of this application in which:

Fig. 1 is a vertical sectional View taken longitudinally through a steam iron constructed and arranged in accordance with my invention; and

Figs. 2 and 3 are, respectively, sectional views taken along the lines II-1I and III-III of Fig. 1.

Reference will now be had to the drawing, wherein I have shown my invention applied to a steam iron including, generally, a base or soleplate IO, a casing ll supported thereon, a handle I2 for the manipulation of the iron and a reservoir It for water or other liquid to be vaporized and disposed within the casing ,l I. As shown in Fig. 2, the soleplate H) has a pointed toe I 4 at one end and a heel l5 at its opposite end, the sides it of the soleplate being curved. The soleplate ID is heated, preferably, by a cast-in electric heating element l1 ofsuitable size and shape to impart heat to all portions of the soleplate Ill. As the construction and operation of heating elements of the type shown at l! are so well understoodin the art, no further description of the same is deemed necessary and a showing of the element I! in Fig. 2 has been omitted for the sake of clearness.

The soleplate Ill is provided with a well It for housing a thermostat IQ of suitable construction and operative to control energization of the heating element I! in accordance with the temperature of the soleplate. Adjustment of the thermostat IB is effected by an adjusting screw 2i actuated by a handle 22. Adjacent the rear end or heel l5 of th soleplate I0 is a water vaporizaa tion chamber 23 which communicates with steam discharge nozzles 24 by means of a passage 25 formed in the soleplate ill. As shown by the dotted lines in Fig. l, the passage 25 extends forwardly from the chamber 23 around the thermostat well Is and terminates in the toe of the sole plate 10. The orifices 24 extend downwardly from the passage 25 and terminate, preferably, in a shallow recess 26 formed in th ironing surface of the soleplate I 0.

. The water reservoir !3 includes upper and

lower wall members

21 and 28, respectively, and a water discharge valve generally indicated at 29. The, latter includes a casing 3| which is brazed or otherwise secured to the upper and

lower wall members

21 and 28, which casing 3| includes inlet ports 32 and a discharge port 33. The amount of water discharged through the discharge port 33 is controlled by a needle valve member 34 movable within the casing 31 and adjusted by a handle 35.

The means for admitting liquid to the reservoir is preferably includes an open-end, generally cylindrical thimble 38 having a filling opening 39 formed in the side thereof, the open end of the thimble 38 communicating with the reservoir at all times. The thimble 33 is movable in a cove 40 formed in the top wall 21 of the reservoir l3 and is biased to the position shown in the drawing by a spring 4|. A plug 42 is fixed to the thimble 38 and defines a handle for moving the thimble outwardly within the cove 40 to expose the inlet opening 39. Preferably, the plug 42 is shaped to conform to the contour of the handle I2 as shown. In filling the iron, the iron is moved to up-ended position with the toe l4 uppermost andis disposed on a heel rest 43. formed on the rear of the casing l I. In the up-ended position of the iron, it is supported by the heelrest portions' shown at 43 (see Fig, 2) and. bya rear portion 44 of the handle l2, resting on a supporting surface represented by the broken line A. With the iron in this position, the thimble 33 is withdrawn from the cove, 40 and liquid is poured through the inlet opening 39 until the liquid shows at theopening 39 or overflows the edges of, the opening 39. When the iron is properly filled, the'level of the water isindicated by the broken line]; in Fig. 1. When subsequently tilted to its horizontal or operating position, the level of the waterin the reservoir is indicated by thev broken line C. Of course, whenthe plug 42 isreleased the'spring 4| returns the thimble 38 to'the position shown in the drawing.

In accordance with my invention, a passage 45 is. provided for conveying liquid from. the, reservoir I3 to the inlet ports 32 of'the valve 29, which passage 65 is, preferably, defined by a plate as, a portion of which is. spaced above the bottom. wall 28. The edge portions of the plate, shown. at M, are brazed or otherwise secured to the bots tom wall 28. The plate is also brazed to the casing 3! of the valve 23, as shown at 58, and to a tube 49 enclosing the thermostat adjusting screw.

2!, as shown at to provide fluidtight connections. The inlet of the passage 45, indicated at 52, is disposed in a region of the reservoir adjacent its bottom wall 28, which region is elevated with respect to the liquid level B when the iron is up ended. During ironing periods, liquid from the reservoir enters the passage 45 and flows throughthe ports 32 and 33 of the valve 23 to the vaporizing chamber 23. As the-liquid contacts the heated wallsof the chamber 23, it is rapidly vaporized and the steam passes through the passageZh to the nozzles 23 and the fabrics being pressed. Entranceof liquid to the passage 45 is terminated when the operator disposes the iron in up-ended position upon the heel rests 43 and handle portion 44. Steaming is terminated after the smallarnount of liquid contained in the passage li is'vaporized in thevaporizing chamber W hen the iron is again tilted to its operatingposition, flow of liquid to the passage 45 for de-- livery to. the vaporizing chamber is initiated.

I have found that, by disposing the vaporizing chamber remote from the toe M of thesoleplate, the temperature of the point or toe l4 of the soleplate IE} may be maintained at the desired value regardless of the amount of steaming necessary for the particular fabric being treated and, therefore, the amount of liquid being vaporized. In prior structures, known to me and having a vaporizing chamber remote from the toe of the soleplate, steaming continues when the iron is lip-ended, as the vaporizing chamber is at an elevation lower than the level of liquid in the reservoir in the up-ended position of the iron.

From the foregoing description, it will be apparent that I have provided an improved steam iron having its vaporizing chamber remote from the point of the iron in order to prevent excessive cooling of the front end of the iron and wherein steaming is terminated in the up-ended position of the iron. The conduit structure for conveying liquid from the reservoir to the vaporizing chamber which I have disclosed is shown by way of example and it is to be understood that other forms of conduit constructions may be employed without departing from the spirit of the invention.

While I have shown my invention in but one form, it will be obvious to those skilied in. the art" that it is not so limited, but susceptible of variouschanges and modifications without departing from the spirit thereof.

What I claim is:

1. In a steam iron, the combination of a sole-' plate, means for heating the soleplate, a reservoir for liquid superimposed on the soleplate, a rest arranged adjacent one end of the soleplate for supporting the iron in lip-ended position, means defining a vapor-generating chamber in heat transfer relation with the heating means, said V8L- nor-generating chamber being disposed at an; elevation lower than the highest level of liquid in the reservoir when the iron is up-ended, a con,- duit disposed within the reservoir for conveying liquid from the reservoir, said conduit having, an inlet end communicating with a region of the reservoir which is lowermost when. the iron isin ironing position and which region is elevated with respect to the highest level of the liquidLin the reservoir when the; iron is up-ended and said conduit extending rearwardly of the reservoir from said region to adjacent the vapor-generating chamber and, a valve connecting a. portion of the conduit remote from the inlet end thereof and said vapor-generating chamber.

2. In a steam iron, the combination. of a sole plate, means for heating the soleplate, a reservoir for liquid superimposed on the soleplate, a rest arranged adajcent one end of the soleplate for supporting the iron in Lip-ended position, means defining. a vapor-generating chamber in heat transfer relation with the heating means, a valve controlling the passage of liquid from the resor voir to said vapor-generating chamber in-' cluding a liquid inlet port, said port being disposed at an elevation lower than the highest level of the liquid in the reservoir when the iron is up ended and a conduit arranged within the reser-- voir for conveying liquid from the reservoir to said valve inlet port, said conduit having its inlet end remote from the valve inlet port and disposed in a region of the reservoir that is elevated with respect to the highest level of the liquid in thereservoir when the iron is "up-ended.

3. Ina steam iron, the combination of a soleplate, means for heating. the soleplate, a. rest arranged at one end of the soleplate for supporting the iron in up-ended position, a reservoir for liquid. having a bottom wall superimposed upon said soleplate, means defining avapor-generating chamber within said soleplate, a partition secured within said reservoir and spaced from said bottom wall for defining a relatively narrow conduit for conveying liquid from the'j reservoir, said conduit havingits inlet end disposed in a region of the reservoir which is elevated with respect to the level of liquid in the resefjrvoinwhen the iron is up-ehdecLfa valve struct'e having an inlet port communicating with a duit disposed: at an elevatio let end ofthe conduit when he iron is up-ended, said valve structure having an outlet port communicatingwith the vaporgej'ierating chamber, and nieanseifective in the un -ended position of the iron for admitting liquid to the reservoir.

4. In a steam iron, the combination of a soleplate having a pointed toe a d a heel, means for heating the-'soleplate, mean fdeiining a liquidvaporiz'ing chamber within soleplate adjacent the heel thereof, a reservoir or liquid superimposed upon the soleplate, val means controlling the flow of liquid from the rvoir to the vaporizing chamber and including 11 outlet port communicating with the vapo g chamber and an inlet port, means for sup ng the iron in upended position so that the soleplate is arranged in a generally vertical plane with its toe uppermost, said inlet port of the valve being disposed below the highest level of the liquid in the reservoir when the iron is in its up-ended position, means defining a conduit within the reservoir for conveying liquid from the reservoir to said inlet port of the valve, said conduit having its inlet end communicating with a region of the reservoir which is lowermost in the pressing position of the iron and which is elevated with respect to the level of liquid in the reservoir when the iron is up-ended, and means for admitting liquid to the reservoir.

EARL K. CLARK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,962,940 Schaefer June 12, 1934 2,237,381 Wallace Apr. 8, 1941 2,387,281 Morton Oct. 23, 1945 25 2,425,598 Clum Aug. 12, 1947