US3703043A

US3703043A - Steam iron

Info

Publication number: US3703043A
Application number: US163609A
Authority: US
Inventors: Nobutaka Ogata; Riyouzi Kumamoto; Shuzi Asada
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1970-07-21
Filing date: 1971-07-19
Publication date: 1972-11-21
Anticipated expiration: 1989-11-21
Also published as: AU3145571A; DE2136050B2; CA942655A; AU446587B2; DE2136050A1; FR2103102A5

Abstract

A steam iron in which a large number of steam nozzles are grouped into a plurality of groups and means for delivering steam to said respective groups is shiftable, from a state of delivering steam to any one of said groups to a state of delivering steam to any other selected group, and further indicator means is provided to indicate which of said groups steam is being delivered to.

Description

[151 3,703,043 51 Nov. 21, 1972 United States Patent Ogata et a1.

[56] References Cited UNITED STATES PATENTS Shijonawate;

154] STEAM IRON [72] Inventors: Nobutaka Ogata,

Riyouzi Kumalnoto,

Toyonaka; 1' Japan 12/1964 Swenson..................

3,165,843 l/l965 Willman...................38/77.83 3,496,661 2/1970 Davidson et a1.

Ltd., Osaka, Japan July 19, 1971 [21] Appl. No.: 163,609

Primary Examiner-Patrick D. Lawson [22] Filed:

Attmey-Stevens, Davis, Miller & Mosher ABSTRACT A steam iron in which a large number of steam nozzles Foreign Application Priority Data July 21, 1970 Japan are grouped into a plurality of groups and means for Aug 1970 Japan delivering steam to said respective groups is shiftable, API'II 5, 1971 Japan......................46/21137 f a State f delivering steam to any one of said ism r..l a e 8 Y HS anm a a m e e my 8 mm e u tao k oe .mmw r a mm. dn 0 d 7 r m 0 01% em t e m m ww 80 0 r 027mm 3 m e w mw mmmd SVd 36 3 80 .8 n ,7 ,a -JL SW78 13M WW WW1 mu7 "7 m8 mu m m MS L C d s m UmF 1]] 2 8 555 11.1

13 Claims, 48 Drawing Figures P'ATENTEDnnm m2 SHEET UlUF 10 PATE'NTEDnum I972 3. 703.043 sum 02 or, 10

PATENTEDuuv 21 m2 3. 703; 043 SHEET .03 or 10 PATENTEDuuvzu I972 SHEET on 0F 10 PATENTEDNUVZI 1912 SHEET U7UF1O FIG. 20

PATENIEDuuvz: I972 3,703,043

- SHEET 10 0F 10 FIG. 23a FIG. 24:? FIG. 2/8 F/G. 2Z8

FIG. 23/ FIG. 24) FIG. 2/! F/G. 22f

STEAM IRON This invention relates to a steam iron having steam nozzles in a base thereof for ejecting steam therethrough.

Conventional irons of the type described have been designed such that steam is constantly ejected in the same state regardless of the kind of clothes to be pressed, i.e., the properties of the cloth or material, and accordingly the result of pressing has not always been the same depending upon the nature of the material fiber in the clothes.

In recent years, an increasing number of different kinds of fibers have been commercially used owing to the rapid progress of chemical fibers and it is presently impossible to obtain a good pressing result for any given fiber.

The present invention has been achieved with a view to solving such inconvenience, and the first object of the invention is to provide an improved steam iron which enables a better result of pressing to be obtained by varying the state of being ejected from the steam nozzles and thereby selectively supplying steam in the state most suitable for the cloth material to be pressed.

The second object of the invention is to provide an iron in which steam nozzles are grouped into a plurality of groups and an arrangement is made such that the ejection of steam is shifted from one of said groups to another of said groups by manually operating a button, whereby the operational procedure is rendered simple and the fatigue of the user can be minimized during use of the iron.

The third object of the invention is to provide an iron in which steam nozzles are grouped into a plurality of groups and means for shifting a fiow of steam to the respective group is operatively associated with opening and closing means to concurrently operate the former, whereby a compact and effective steam direction shifting mechanism can be obtained.

The fourth object of the invention is to provide an iron in which a large number of steam nozzles are grouped into a group consisting of all of said steam nozzles and another group consisting of only a small number of the same, and steam is selectively delivered to said respective groups, whereby strong steam ejection and weak steam ejection can be, selectively easily obtained.

The fifth object of the invention is to provide an iron in which the ejection of steam from steam nozzles is varied to the state most suitable for the cloth material to be pressed and indicator means is provided to indicate the state of ejection of steam, whereby a casual mistake in a pressing operation can be precluded and the handling of the iron is rendered simple.

The sixth object of the invention is to provide an iron in which a switching device is employed for shifting the pressing operation from a dry to a steam operation, and vice versa, whereby the construction of the iron can be simplified and a reliable shifting operation can be obtained.

Other objects and features of the present invention will become apparent from the following description of an embodiment shown in the accompanying drawing:

FIG. 1 is a side elevational view, partially in section, of an embodiment of the stem iron according to the present invention;

FIG. 2 is a top plan view of the base looking in the direction of II-II of FIG. 1;

FIG. 3 is a cross-sectional view taken on the line Ill-III of FIG. 2;

' FIG. 4 is a top plan view of the front portion of the iron of FIG. 1;

FIG. 5 is a bottom view of the base of the iron shown in FIG. 1;

FIG. 6 is an exploded perspective view of the manually operated button means of the iron shown in FIG. 1;

FIG. 7 is a bottom view of the handle'cover shown in FIG. 6;

FIG. 8 is a diagram illustrating the operation of the manually operated button in the handle cover of FIG.

FIG. 9 is a top plan view of the manually operated button of the iron shown in FIG. 1;

FIG. 10 is a top plan view of the rotary member of the iron shown in FIG. 1, which is provided with the indicator means;

FIG. 11 is a top plan view of the rotary member which is provided with another type of the indicator means;

FIG. l2is a top plan view of a spring connecting the rotary member and the opening and closing rod, of the iron shown in FIG. 1;

FIG. 13 is an exploded perspective view of another type of the manually operated button means;

FIG. 14 is a bottom view of the handle cover shown in FIG. 13;

FIG. 15 is a diagram illustrating the operation of the manually operated button in the handle cover of FIG.

FIG. 16 is an enlarged perspective view showing the relative position of a portion of the opening and closing rod and the steam pipe, of the iron shown in FIG. 1;

FIGS. 17, 18 and 19 are views showing another type of the indicator means respectively, of which FIG. 17 is a fragmentary cross-sectional view of an iron comprising the indicator means; FIG. 18 is a top plan view of the iron; and FIG. 19 is a top plan view of the indicator member;

FIG. 20 is a cross-sectional view of this type of iron comprising a spray means; and

FIGS. 21a to 24a, FIGS. 21b to 24b, FIGS. 21c to 24c, FIGS. 21d, to 24d, FIGS. 21e to 24c, FIGS. 21f to 24f and FIGS. 21g to 243 are a set of views illustrating the operation of the switching means cooperating with the manually operative button, in the iron of FIG. 1.

An embodiment of the present invention will be described with reference to the drawing. Referring to the drawing, an iron base 1 is a casting of aluminum alloy or the like and has a heater 2 mounted therein. The heater 2 is of an armored type and comprises a protecting sheath 3, and electric resistance wire 2 extending in said protecting sheath 3 and a heat-resistant electric insulating material 4, such as granular compressed magnesium oxide, interposed between said protecting sheath and said electric resistance wire to electrically insulate them from each other. Further, the heater 2 is extended in the usual manner from the rear portion to the front portion of the iron along one side of the'base and from the front portion to the rear portion of the iron along the other side of the base. An iron cover 5 is superposed on the base 1 and a handle 6 is secured to the upper face of said iron cover. A vaporizing chamber 7 is provided in the base 1 inside the area bounded by the heater 2. This vaporizing chamber 7 is formed by a recess formed in the base 1. A steam supply chamber 8 is formed exterior of the vaporizing chamber 7 extending around said vaporizing chamber and to the rear portion of the iron in such a manner as to stride over the heater 2 and has a number of steam nozzles 9. A steam chamber 10 of relatively narrow space is formed at the forward end portion of the base 1, which is formed by recessing the base 1 and has a small number of steam nozzles 11. The steam nozzles 11 are different in shape from the steam nozzles 9 and each of the steam nozzles 11 communicates with a noncircular recess 12 extending longitudinally of the iron,

so that the steam maybe expanded in said recess. A steam chamber 13 is surrounded by the vaporizing chamber 7, the steam supply chamber 8 and the steam chamber 10, and a change-over valve 15 is mounted therein. The steam chamber 13 and the steam supply chamber 8 are separated from each other by a wall 14' and throughho1es 16 are formed in said wall 14' for introducing the steam delivered to said steam chamber 13 into the steam supply chamber 8. The change-over valve 15 is supported on a circular valve seat 17. The valve seat 17 has a depression and a valve port 18 for extending the change-over valve 15 therethrough. The change-over valve 15 has a valve plate 19 at the lower end thereof, which is in contact with the underside of the valve seat 17 to close the valve port 18. A spring 21 A is disposed between the upper face of the valve seat 17 and a larger diameter portion of the valve 15. Thus, the valve plate 19 is held in pressure contact with the underside of the valve seat '17, closing the valve port A base cover 22 is fixed to the upper face of the base 1 by means of fittings 23, such as screws, covering the major portion of the vaporizing chamber 7 and completely covering the steam supply chamber 8 and the steam chamber 10. The base cover 22 has a channel 24 formed therein to communicate the upper portion of the valve seat 17 with the steam chamber.10. The valve seat 17 is secured between the base cover 22 and the base 1. A steam'pipe 25 extends substantially vertically upwards through the base cover 22, with its top end located within a tank 26 and its lower open end located opposite to the upper end of the change-over valve 15. The vaporizing chamber 7 is covered by a cover 27 which is fixed to the base cover 22 with packings 28, 28' interposed therebetween. The cover 27 is made of a material of relatively low heat conductivity, such as stainless steel, and has the steam pipe 25 penetrating therethrough. The cover 27 is fixed to the base cover 22, steamtight, by a suitable method. A nozand closing rod 32 has its lower end located opposite to the nozzle body 29 and is provided at the lower end extremity with a needle valve 33. The nozzle 30 of the nozzle body 29 is opened or closed by this opening and closing rod 32, whereby the generation of steam is started or stopped. A cylinder 34 is disposed in thank 26to encircle the the tank and closing rod, the back pressure pipe 31, the steam pipe 25 and other component parts, and communicates with said tank 26 by a channel 35. The cylinder 34 and the tank 26 are made of a material equivalent to that of the cover 27, and the tank 26 is hermetically fitted to the peripheral edge of the cover 27 through a packing 36. A water supply tube 37 is connected to the top end of the tank 26 and a water inlet opening 38 is formed in the upper face of the tank 26. The top end of the opening and closing rod 32 extends through the water inlet opening 38 and further through the water supply tube 37 to the upper portion of the cavity in the handle 6. Reference nu meral 39 designates a water inlet port connected to the front side of the water supply tube 37 through a packing. Water is poured from the inlet port-39 into the tank 26 through the water supply tube 37 and the water inlet opening 38. Extending into the steam pipe 25 is a change-over rod 40 having the lower end fixed in a recess 41 formed in the enlarged diameter portion 20 of the change-over valve 15. The upper end of the change-over rod 40' is supported by a supporting member 42 pressure-fitted into the steam pipe 25. This change-over rod 40 is vertically slidable in the steam pipe 25. The supporting member 42 serves to hold the zle body 29 is mounted in the cover 27, with its nozzle valve 44 is obstructed by a flange 45' of a cap 45 pro-v vided at the top end of the change-over rod 40, and its coming off the steam pipe 25 is prevented. A spring 46 is interposed between the valve 44 and the cover 27. In the normal state, this spring 46 is compressed under the weight of the valve 44 and the steam inlet ports 43 are A in communication with the tank 26 asshown in FIG. 1. Therefore, the spring load is very small. However, when the iron happens to be brought down, the weight of the valve 44 exerted on the spring 46 progressively decreases as the steam pipe 25 is tilted to a horizontal state, so that the valve 44 is gradually moved toward the steam inlet ports 43 and finally closes said steam inlet holes. On the contrary, when the iron is returned to its normal position and the steam pipe 25 is brought to a vertical position from the horizontal state, the valve 44 moves down along the steam pipe 25 under gravity, whereby the steam inlet ports 43 are communicated with the tank 26. Reference numeral 47 designates an opening and closing valve located in the tank 26 adjacent the water inlet opening 38 and mounted on the opening and closing rod 32. This valve serves to open or close the water inlet opening 38 incident to vertical movement of the opening and closing rod 32. Further, the valve 47 comprises a packing or the like to provide fluidtight sealing in cooperation with the wall of the tank 26. Below the opening and closing valve 47 is disposed a circular metallic member 48 which is also fixedly mounted on the rod 32 and has a cam surface 49 on the underside of the peripheral edge portion thereof. The flange 45 of the cap 45 connected to the change-over rod 40 is held in engagement with the cam surface 43 from the lower side thereof. The arrangement is such that when the metallic member 48 rotates, the flange 45' of the cap45 in engagement with said cam surface 49 is moved down, whereby the change-over rod 40 moves down against the biasing force of the spring 21, opening the valve port 18. On the contrary, when the point of engagement between the cam surface 49 of the metallic member 48 and the flange 45' of the cap 45 is elevated, the change-over valve and the change-over rod 40 are pushed up under the biasing force of the spring 21, so that the valve port 18 is closed. Thus, it will be understood that, by suitably selecting the configuration of the cam surface 49, the valve port 18 can be alternately opened and closed by rotating the metallic member 48. Reference numeral 50 designates a spring mounted around the opening and closing rod 32 between the metallic member 48 and the cover 27, by which said rod 32 is constantly urged upwards.

In using the steam iron of the construction described above, the opening and closing rod 32 is first of all moved down against the biasing force of the spring 50 by the manual operation to be described later, whereby the water inlet opening 38 is opened and the nozzle 30 of the nozzle body 29 is closed. Water is poured into the tank 26 from the water inlet port 39 in this state. Then, the iron base 1 is heated by the heater 2. When the wall 27 of the vaporizing chamber has reached a temperature at which the water dropped from the tank 26 is instantaneously vaporized into steam, the opening and closing rod 32 is moved upwards by manual operation, whereby the water inlet opening 38 is closed and the nozzle 30 is opened, allowing the water in the tank 26 to drop in the vaporizing chamber 7. The water thus dropped is continuously vaporized in the vaporizing chamber 7 to generate steam. The steam generated in the vaporizing chamber is returned into the tank 26 through the back pressure pipe 31. In the initial stage of operation, the steam is accumulated in the upper portion of the tank 26 because the pressure in said tank is low and substantially equal to the atmospheric pressure. However, the steam pressure in the tank soon becomes higher so that it flows from the steam inlet ports 43 through the steam pipe 25 into the recess 24 in the base cover 22 and thence into the steam chamber 10. In this case, since the change-over valve 15 is held in the position to close the valve port 18 by the manual operation as shown in FIG. 1, the steam passing in the steam pipe 25 is entirely delivered into the steam chamber 10 and ejected from a small number of the steam nozzles 11. Therefore, the amount. of steam ejected from each nozzle is relatively large and the steam is ejected vigorously.

On the other hand, when the metallic member 48 is rotated by manually operating the opening and closing rod 32 to lower the point of engagement between the cam surface 49 and the flange 45 of the cap 45, the

change-over valve 15 is moved down against the biasing force of the spring 21, whereby the valve pot 18 is opened. Therefore, the steam passing in the steam pipe 25 is admitted in the steam chamber 13 through said valve port 18 and also in the steam supply chamber 8 through the through-holes 16. At the same time, some of the steam is delivered to the steam chamber 10 through the recess 24 in the base cover 22. Namely, while the amount of steam delivered from the steam pipe 25 is constant, the steam is divided and delivered into the steam supply chamber 8 having a relatively large number of the steam nozzles 9 and the steam chamber 10 having a relatively small number of the steam nozzles 11, so that the amount of steam ejected from each nozzle is relatively small and the steam is applied to the cloth softly. It will be obvious that the iron can be used as an electric iron by shifting the operation to a dry operation during use of the iron as a steam iron. The shifting of the operation can be achieved by lowering the opening and .closing rod 32 by the manual operation against the biasing force of the spring 50. Namely, by lowering the opening and closing rod 32, the nozzle 30 is closed so that the feed of water from the tank 26 is stopped and hence the generation of steam is stopped. Thus, the pressing is carried out only by the heat of the base 1.

Now, the manual operation mechanism in the subject steam iron will be described. A handle cover5l provided above the cavity in the handle 4 is formed with a through-hole 53 for mounting a manually operative button 52 therein, in coaxial relation with the opening and closing rod 32. Further, a temperature scale plate is provided on the upper face of the handle cover. The manually operative button 52 is preferably made of a material, such as Duracon, which is highly resistive to wear. A cylindrical guide member 54 is formed on the underside of the handle cover 51-to surround the button-receiving through-hole 53 and further a wall 55 is formed along the peripheral edge of the through-hole 53 over the entire circumference of the inner surface of the guide member 54, by which an upward movement of the button 52 is limited. The-button 52 has a plurality of regularly spaced claws 56 formed on the outer surface of the lower end portion thereof. These claws abut against the wall 55 of the guide member 54 when the button 52 moves upwardly. Some claws 56' of the claws-56 project outwardly further than the other ones. The underside of each claw is tapered downwardly at an acute angle smaller than These claws 56 are respectively received in grooves57 formed in the inner surface of the guide member 54 in equally spaced relation, for vertical movement therein. Some grooves 57' of the grooves 57 are deeper than the other ones, in which the aforesaid longer claws 56' of the button 52 arereceived, whereby the button 52 is held against rotation. Reference numeral 58 designates a rotary member rotatable in one direction in engagement with the claws 56. The rotary member 58 has arms 59 for engagement with the claws 56 and each arm 59 has on its upper face a tapered surface 60 inclining in one direction. Namely, when the claws 56 are brought into engagement with the tapered surfaces 60 of the arms 59,,either the claws 56 or arms 60 tend to rotate or both of them tend to rotate in opposite directions respectively. However, since the claws 56 are received inthe grooves 57 in the guide member 54, the tapered surfaces 60 of the arms 59 slide on the inclined surfaces of the claws 56 and thus the rotary member 58 only rotates in one direction. The rotary member 58 is to be received in the button 52 and is provided on the upper surface thereof indicator means, e.g., one comprising different colors as shown in FIG. 10, one comprising letters as shown in FIG. 11 or the most suitable one of any other conceivable indicator means, so that its angular position representative of the operational state of the iron may be readily confirmed from the outside. n the other hand, the button 52 is provided with a sight window 61 through which the indicator means is visible.

When the indicator means comprising different colors is employed in the embodiment described above, it is used in the following manner: Namely, for instance, a white" color portion is used to represent the dry operation of the iron, a light color portion to represent the steam operation and further a dark color portion to represent the jet steam operation, and by manually locating the respective color portion in the sight window 61, a desired operating condition of the iron can be selectively obtained. v

The rotary member 58 and the opening and closing rod 32 are operatively connected with each other by a spring 62 to positively transmit the rotation of the former to the latter. The lower end of the spring 62 is anchored to the rod 32 by fitting its end arm 63, extending diametrically across the coil, in a slit 64 formed in the top end of said rod 32, while the upper end thereof is connected to the rotary member 58 by inserting its curled end portion 65 into said rotary member.

Reference numeral 66 designates anoperating pin projecting outwards from the lower portion of the manually

operative button

52, and 67 designates a switching device fixed to the underside of the handle cover 51 by means of screws 68 or the like. The switching device 67 includes a guide surface 69 for receiving the operating pin 66 of the button 52 which surface opposes to a part of the grooves 57 in the guide member 54, a main body 70, a reversibly movable latching plate 71 and a spring 72. The reversibly movable latching plate 71 has a sloped portion 73 at the upper portion thereof on which the operating pin 66 will slide, a latching portion 74 successive to said sloped portion for latching said operating pin 66, a-cut bent lug 75 successive to said latching portion for releasing the engagement between the operating pin 66 and the latching portion 74 when the button 52 is depressed, and another cut-bent lug 76 successive to said first cut-bent lug 75 constituting a lowering preventing wall 77 on the side of the latching plate 71, said lowering preventing wall 77 being located upwards of the lower end 73' of the sloped portion 73.

Now, the relationship of the manually operative button 52, the rotary member 58 and the guide member 54, will be described. The button 52 is inserted into the through-hole 53 in the handle cover 51 from the lower side in such a manner that the claws 56 are received in the grooves 57 in said guide member 54 respectively.

Then, the rotary member 58 is inserted into the'button 52 and connected with the opening and closing rod 32 by the spring 62. When the button 52 is pushed down in this state, the claws 56 of said button engage the tapered surfaces of the arms 59 of the rotary member 58 respectively and slide thereon. As a result, the rotary member 58 only is rotated in one direction since the button 52 is held against rotation by the grooves 57 in the guide member 54. Suppose that the arms 59 of the rotary member 58 are respectively located in the grooves 57 in the guide member 54 and the button 52 is in its highest position, namely the iron is in the state of steam operation. When it is desired to shift the operation from the steam to dry, the button'52 is depressed manually in the direction of the arrow A in FIG. 8. The arms 59 move down in the respective grooves 57 together with the rotary member 58 and, when they have passed acute-angular guides 78 just slightly, the point of contact between each claw 56 and each tapered surface 60 is displaced and the rotary member 58 rotates in the direction of the arrow B and the arms 59 move into the grooves 57" and tend to move upwards in said grooves together with the button 52. However, the upward movement of the button 52 must be prevented because otherwise the operational state of the iron is again returned to the steam" operation. The switching device 67 is employed to prevent such 'upward movement. Now, the relation between the switching device 67 and the button 52 will be described with the reference to FIGS, 21a to 240. These figures show a state in which the button 52 is in its highest position, i.e., the state of steam, and the operating pin 66 on the button 52 is in contact with the upper portion of the latching plate 71 of the switching device 67. In this case, the opening and closing rod 32 is held in an elevated position under the biasing force of the spring and therefore, the nozzle 30 is opened. For shifting the operation of the iron from steam to dry," the button 52 is pushed down in the direction of the arrow C from the state shown in FIGS. 21a to 24:1 to the state shown in FIGS. 21b to 24b, whereupon the operating pin 66 of the button 52 moves down and pushes the sloped portion 73 of the latching plate .71. The latching plate 71 is caused to make a pivotal movement about a rivet 79 in the direction of thearrow D against the biasing force of the spring 72 and the downward movement of the operating pin 66 is stopped. When the pressure is removed from the button 52 at this point, the latching plate 71makes a slight pivotal movement in the direction of the arrow B under the biasing force of the spring 72 and the operating pin 66 is latched by the latching portion 74. Therefore, the button 52 is held against upward movement while resisting to the force of the spring 50. The opening and closing rod 32, therefore, is held in its lowered position closing the nozzle 30. Thus, the switching means is placed in the state shown in FIGS. 210 to 240 and the operation of the iron is shifted to dry."

When it is desired to shift the operation from dry to steam, the button 52 is further depressed in the direction of the arrow F from the state shown in FIGS. 210 to 240 to the state shown in FIGS. 21d to 24d against the biasing force of the spring 50 and the biasing force of the spring 62 by which the opening and closing rod'32 is operatively connected with the rotary member 58. The operating pin 66 is moved down, disengaged from the latching portion 74 and brought into abutting engagement with the inner surface of the lug 75. In this case, the latching plate 71 rotates further in the direction of the arrow G. When the pressure is removed from the button 52 in this state, the operating pin 66 moves upwards in the direction of the arrow H under the biasing forces of the

springs

50, 62 while sliding on the inner surface (the back side) of the lug 75 and causing the latching plate 71 to move axially forwards of the operating pin 66. Upon completion of the upward movement, the operating pin 66 abuts against the upper portion of the latching plate 71 and thereby the switching means is returned to the state shown in FIGS. 21a to 24a. By repeating the above-described operation, the operation of the iron is shifted altemately from steam to dry and dry to steam.

The operation of the iron of the invention constructed as described above will be described hereinafter. In the state of FIG. 1, the iron performs a JET steam pressing operation. Namely, as described previously, the steam generated in the vaporizing chamber 7 passes in the back pressure pipe 31 and gradually accumulates in the upper portion of the tank 26. As the steam pressure gradually rises in the tank 26, the steam moves from the steam inlet ports 43 through the steam pipe 25 into the recess 24 in the base cover 22 and thence into the steam chamber 10, and is ejected vigorously from a small number of .the steam nozzles 11. In this state, JET steam is indicated in the window 61 of the button 52.

When the operation is desired to be shifted from JET steam to dry in the process of ironing, the

button 52 is depressed, whereupon the rotary member 58 pushes the opening and closing rod 32 downward through thespring 62. The opening and closing rod 32 opens the water inlet opening 38 and concurrently closes the nozzle 30. Therefore, the dropping of water into the vaporizing chamber 7 from the tank 26 is stopped and hence the generation of steam is stopped. In this case, the rotary member 58 rotates in one direction while being moved downwards by the button 52, and the operating pin 66 of the button '52is latched by the latching portion 74 of the latching plate 71 .of the switching device 67, so that the opening and .closing rod 32 is held in the lowered position. The indication in the window 61 of the button 52 is also changed from JET steam to dry" incident to'rotation of the rotary member 58. Furthermore, the rotation of the rotary member 58 causes the opening and closing rod 32 to rotate through the spring 62. Therefore, the metallic member 48 mounted on the opening and closing-rod 32 is also rotated. Incident to the rotation of this'metallic member 48, the point of engagement between thecam surface 49 of said metallic member and-theflange 45 of the cap 45 is gradually shifted downwards from its, highest position, so that the change-over valve is half opened by the change-over rod 40. This enables the water filling or draining operation to be achieved quickly and efficiently which is performed in the state of dry, because the flow rate of air into the atmosphere from the tank 26 or into the tank 26 from the atmosphere is high. I

When the operation is desired to be further shifted from dry to steam, the button 52 in the lowered position is further depressed. The tapered surfaces 60 of the rotary member 58 engage the acute-angular guides 78 and the rotary member 58 is received in the grooves 57 in the guide member 54 while rotating in the same direction and moved upwards under the biasing force of the spring 62. The button 52 also moves upwards along the grooves 57. The rotation of the rotary member 58 concurrently causes the opening and closing rod 32 and therefore the metallic member 48, to rotate. As a result of rotation of the metallic member 48, the point of engagement between the cam surface 49 of said metallic member and the flange 45' of the cap 45 is shifted to the lowest position, so that the change-over valve 15 is completely opened by the change-over rod 40. Therefore, the steam from the steam pipe 25 moves from the valve port 18 into the steam chamber 13 and thence into the steam supply chamber 8 through the through-holes 16. At the same time, part of the steam. is delivered to the steam chamber 10 through the recess 24 in the base cover 22. The steam thus delivered is divided and ejected from a large number of the steam nozzles 9 and a small number of the steam nozzles 11. Thus a relatively weak steam can be obtained over the entire surface of the base 1. The indication in the window 61 of the button 52 is also changed from dry to steam incident to the rotation of said rotary member 58.

When the button 52 is pushed down in the direction of the arrow I in the state shown in FIGS. 21f to 24f, i.e., in the process of upward movement of the button 52 ,to the position of JET steam, the operating pin 66 moves down without being latched by the latching portion 74 but'the downward movement of said pin is finally stopped by the downward movement preventing wall 77 as shown in FIGS. 21g to 24g. Namely, in this state the claws 56 of the button 52 are held out of contactwith the arms 59 of the rotary member 58. Therefore, even if the above-described operation is perforrned'from a halfway position, the indication will not be changed to steam unless the switching means is in the state shown in FIGS. .21e to 24e, due to the presence of the downward movement preventing wall 77.

FIGS. Hand 14 shows another type of the switching means. .In this type, the latching portion 74 of the latching plate 71 of :theswitching device 67 shown in FIG 6, :which engages the operating pin 66 when the button'52 isdepressed, to maintain the dry position, isprovided on the ,guide member 81 below the handle cover :80. Namely, :the guide member 81 is formed in the=inner surface thereof with equally spaced relatively deepgrooves 82, relatively shallow grooves 83 between said relatively deep grooves 82 and acute-angular inclining surfaces'84 atthe'lower ends of said relatively shallow grooves '83, each :of which inclines from the relativelyideeptgroove 82 toward the relatively shallow groove 83. The operation of this type of switching means will bedescribed with reference to FIG. 15. Suptapered surfaces86 of said arms at the point when the rotary member has just passed the ends 84 of the acute-angular inclining surfaces 84, and said rotary member 85 is slightly rotated in the direction of the arrow K and latched on said inclining surfaces. Namely, the switching means is placed in a position shown in FIGS. 21c to 240, that is the state of dry. When the button 87 is depressed further in this state, the rotary member 85 is pushed down in the direction of the arrow L and the tapered surfaces 86 of the arms 86 are brought into contact with acute-angular guides 89, whereby the rotary member 85 is rotated in the same direction as before, i.e., in the direction of the arrow K, and its arms 86 are received in the next deep grooves 82. The rotary member 85 is moved upwardly by the spring 90 and the button 87 is also moved' upwardly along the deep grooves 82. The upward movement of the button 87 is finally stopped by a wall 91 and the upward movement of the rotary member 85 is also stopped. Namely, the switching means is placed in a position shown in FIGS. 21e to 24 e, that is the state of steam. As described, the rotary member 85 can be rotated and the operation of the iron can be shifted from steam to dry or vice versa, by only depressing the button 87.

F 16S. 17, 18 and 19 show another type of the indicator means. lnthis type, grooves 95 are provided for vertically slidably receiving the arms 94 of the rotary member 93 inserted into the button 92 and an indicator 97 is provided on the upper surface of an indicator member 96 which is rotatable in association with the rotation of said rotary member 93. The indicator 97 has different colors respectively representing the different states of operation. Reference numeral 98 designates sight windows formed in the handle 99 and the temperature scale plate 100 in register with one of the colors of the indicator 97, through which the state of steam," dry or JET steam is indicated by the respective color.

FIG. 20 shows spray means incorporated in the steam iron of FIG. 1, which comprises a spray button 101 and a spray nozzle 102 which is opened or closed upon depressing said spray button. By employing such spray means, steam adequate for a given fiber can be supplied and good ironing can be effectively achieved.

We claim:

1. A steam iron comprising a base having a heater, a vaporizing chamber and a number of steam nozzles grouped into a plurality of groups, a handle arranged above said base, a water storage tank, opening and closing means for opening or closing a water passage communicating said tank with said vaporizing chamber for controlling water dropping from said tank into said vaporizing chamber, manually operated button means for operating said opening and closing means, means for delivering steam generated in said vaporizing chamber to each of said plurality of groups of steam nozzles, switching means for shifting said steam delivering means from a state of delivering the steam to any one of a plurality of said groups to a state of delivering the steam to any other one of a plurality of said groups, and indicator means for indicating which of said groups of steam nozzles the steam is being delivered to.

2. A steam iron as defined in claim 1, wherein said switching means is operated manually.

3. A steam iron as defined in claim 2, wherein said switching means and said manually operated button means are operatively associated with each other.

4. A steam iron as defined in claim 2, wherein said base has formed therein a steam supply chamber communicating with a large number of said steam nozzles and a steam chamber communicating with a small number of said steam nozzles, and said switching means includes a change-over valve which is disposed in either one of said steam supplying chamber and said steam chamberor in a passage communicating the former with the latter, and further means is provided to manually operate said change-over valve.

5. A steam iron as defined in claim 1, wherein a number of said steam nozzles are grouped into a first group including all of said steam nozzles and a second group including a small number of said steam nozzles.

6. A steam iron as defined in claim 5, wherein a noncircular recess having extensions extending longitudinally of the iron is formed around each of a small number of said steam nozzles in communication therewith.

7. A steam iron as defined in claim 1, wherein said opening and closing means has an opening and closing rod for controlling water dropping from said tank into said vaporizing chamber, said manually operated button means has disposed therein a rotary member which rotates said opening and closing rod when said buttom means is moved vertically, and said opening and closing rod is provided with a metallic member and said switching means including a change-over valve which is operatively associated with said metallic member and opened or closed by said'opening and closing rod incident to rotation thereof.

' 8. A steam iron as defined in claim 7, wherein said opening and closing rod and said rotary member of said manually operated button means are operatively connected with each other by means of a spring, whereby a rotation of said rotary member is transmitted to said opening and closing rod.

9. Asteam iron as defined in claim 1, wherein said indicator means is located adjacent said manually operated button means.

10. A steam iron as defined in claim 9, wherein a plurality of indication media are provided on the upper face of said rotary member of said manually operated button means, while a window is formed in said button means in register with one of said indication media, whereby the operational states of the iron are indicated one after another sequentially through said window incident to the rotation of said rotary member.

11. A steam iron as defined in claim 9, wherein indication media are provided on indicator means operatively associated with said rotary member of the manually operated button means, while a sight window is formed at a portion of the handle in which said manually operated button means is provided, said sight window being in register with one of said indication media.

12. A steam iron as defined in claim 1, wherein said manually operated button means comprises a guide member for vertically movably but unrotatably holding said means, a switching device disposed on one side of said guide member and, having a reversibly movable latching plate, and an operating pin engageable with and disengageable from said reversibly movable latching plate and carried by said manually operated button means.

13. A steam iron as defined in claim 12, wherein said switching device comprises a main body, said reversibly movable latching plate, a latching portion formed on said latching plate and adapted to latch said operating pin, a cut-bent lug formed on said latching plate on a

Claims

4. A steam iron as defined in claim 2, wherein said base has formed therein a steam supply chamber communicating with a large number of said steam nozzles and a steam chamber communicating with a small number of said steam nozzles, and said switching means includes a change-over valve which is disposed in either one of said steam supplying chamber and said steam chamber or in a passage communicating the former with the latter, and further means is provided to manually operate said change-over valve.

6. A steam iron as defined in claim 5, wherein a non-circular recess having extensions extending longitudinally of the iron is formed around each of a small number of said steam nozzles in communication therewith.

7. A steam iron as defined in claim 1, wherein said opening and closing means has an opening and closing rod for controlling water dropping from said tank into said vaporizing chamber, said manually operated button means has disposed therein a rotary member which rotates said opening and closinG rod when said buttom means is moved vertically, and said opening and closing rod is provided with a metallic member and said switching means including a change-over valve which is operatively associated with said metallic member and opened or closed by said opening and closing rod incident to rotation thereof.

8. A steam iron as defined in claim 7, wherein said opening and closing rod and said rotary member of said manually operated button means are operatively connected with each other by means of a spring, whereby a rotation of said rotary member is transmitted to said opening and closing rod.

9. A steam iron as defined in claim 1, wherein said indicator means is located adjacent said manually operated button means.

12. A steam iron as defined in claim 1, wherein said manually operated button means comprises a guide member for vertically movably but unrotatably holding said means, a switching device disposed on one side of said guide member and having a reversibly movable latching plate, and an operating pin engageable with and disengageable from said reversibly movable latching plate and carried by said manually operated button means.