US2727320A - Electric steam irons - Google Patents

Description

2 Sheets-Sheet 1 Filed Sept. 23, 1952 1NVENTOR. John E.

ORNEY.

Dec. 20, 1955 J. E vANcE ELECTRIC STEAM IRONS 2 Sheets-Sheet 2 Filed Sept. 25. 1952 e R c m mE. m o J 2 United States Patent O ELECTRIC STEAM IRGNS John E. Vance, Canton, Ohio, assigner to The Hoover Company, North Canton, Ohio, a corporation of Ohio Application September 23, 1952, Serial No. 311,045 6 Claims. (Cl. .3g-77) The present invention relates to steam irons and more particularly to filling the water reservoir to its full capacity.

An object of the invention is to provide a steam iron having a water reservoir which can be filled to its maximum capacity. Another object is to provide a steam iron wherein the reservoir can be filled to its full capacity while the iron rests upon the ironing surface of the sole plate. Another object is to provide a water reservoir having an air trap which can be vented to permit water in a fill tube to enter the reservoir and completely ill the latter while the iron rests upon the sole plate ironing surface. Other objects and advantages of the invention will become apparent from the follow-'ing description and drawings, wherein:

Figure l is a side view of the iron, partly in section, resting on its sole plate and showing the reservoir partly iilled with water, and the air trap preventing water in the ll tube from entering the reservoir, and

Figure 2 is a front sectional view of the iron resting on its soie plate and showing the air trap vented and the water in the lill tube discharged into the reservoir to completely till the latter.

The embodiment or the invention herein disclosed comprises a sole plate t), having a U-shaped heating element 11 with its bight toward the toe 12 of the sole plate, and an open top steam generating chamber 13 from which extends suitable passageways 14 to conduct steam to unshown outlets in the face 15 or the sole plate 19 for treating the fabrics to be ironed. A cover i6 is removably attached by screws 17 to the sole plate 10 and includes a member 18 staked at 19 to the cover and provided with an annular ange 21) defining an opening 21 overlying the steam generating chamber 13.

A water reservoir 25 @verlies the sole plate 19 and is provided with an outlet 26 in a projecting boss 27 seated in the annular ange 2b for admitting water to the steam generating chamber 13. Extending through the reservoir 25 is a tube 2S which receives a bolt 29 threaded into a nut 30 anchored to the sole plate 10 to removably secure a cover shell .3i to the sole plate. Another tube 32 also extends through the reservoir 25 and receives in spaced relation a stem 33 of an unshown thermostat positioned below the reservoir to control the temperature of the sole plate 10. A dial 34 is removably secured to the upper end of the stern 33 and is detachably connected to the cover shell 31 by spaced springs 35 riveted to the shell 31.

A handle 37 is provided with a hand grip 38 and front and rear supporting legs 39 and 40 respectively. The rear leg 40 is securedl to the cover shell 31 by a screw All, and the front leg by a screw 42 attached to a bracket 43 which extends upwardly into and is secured by a screw 44 to a hollow portion 45 ofthe leg 39. At the rear end of the handle 37 is a projection 46 which cooperates with the rear end 47 of the shell 31 to support the iron in upended rest position.

A tubular valve housing 50 is permanently attached to the reservoir 25 by being staked to the top wall 51 of the 'ice latter as indicated at 52. The lower portion 53 of the valve housing is disposed inwardly of the reservoir 25 and its inner end 54 rests upon the bottom 55 of the reservoir, and is provided with a plurality of marginal slots 56 for entrance of water within the bore 57 of the housing 59 and to the outlet 26. A portion 58 of the vaive housing extends above the reservoir 25 into the hollow section d5 of the handle front leU 39 and terminates in a rectangular' shaped ange 59. A valve stem 60 is siideably mounted in the bore 57 of the housing 50 and is provided at its lower end with a needle valve 61 to control the outlet 26 and thus dow of water to the steam generating chamber 13. The upper end of the valve stern 60 projects beyond the frange 59 and is provided with an elongated opening 62 receiving a pin 63 mounted in spaced Walls ta-64 or' a valve actuator 65. Each of the spaced walls et! of the actuator has a marginal slot 66 for rotation on a pin 67 supported in spaced legs 68 68 of a U-shaped bracket 69 secured to the ilange 59 by a screw 70. A tension spring 71 is connected to the bracket 69 and the actuator and passes substantially through the pivot pin 67 of the actuator when the valve 61 is `open as shown in Figure 2. A detent 72 on each of the bracket legs 68 cooperates with an opening 74 in the actuator 65 to hold the latter and the vaive 61 in the position shown in Figure 2 against the bias of the spring 71. When the actuator 65 is moved clockwise from the position in Figure 2 the spring 7i snaps the valve stem 60 downwardly in the housing 5b and seats the valve 61 in the outlet 26 to close the latter.

A leaf spring 7S is secured at one end to the cover shell 31 by the screw 4.2 and the opposite end has a U-shaped marginal recess 76 which rests against the staked rib 77 to urge the boss 27 into seating engagement with the ange 2t! when the cover shell 31 is attached to the sole plate 10 by the bolt 29.

Formed integrally with the valve housing 50 is,a portion 86 of a ll tube 81 and includes a tubular section 82 and a U-shaped section S3, the latter extending upwardly from the tubular section 82 to the liange 59 and forwardly of the valve housing 5t? to the line S4. The upper portion of the fill tube S1 is completed by a U-shaped member S5 removably secured by a screw 86 threaded into the valve housing The upper end 87 of the member 85 projects forwardly of the flange 59 to form a top opening 88 for pouring water into the lill tube. The tubular portion 82 of the lill tube extends into the reservoir to the line A-A to limit the level of water initially poured into the reservoir by forming an air pocket 89 between the lower end 98 of the till tube and the top wall 51 of the reservoir as shown in Figure l.

A plurality of spaced vent ports 91 are provided in the valve housing 5t? above the initial water level line A-A and communicate with the air pocket S9, bore 57 and the ll tube Si. An annular valve 92 controls the vent ports 91 and is secured to the valve stem 60 between a rib 93 and a washer 94, the latter being held in place by the threaded connection 95 of the two parts of the valve stern 6i?. The valve 92 is operated by the actuator 65 simultaneously with the needle valve 61. The full water capacity of the reservoir 25 is determined by the upper marginal walls of the vent ports 91 indicated by the capacity level line B-B.

When it is desired to ill the reservoir the iron is placed upon its sole plate 1i) in ironing position and the actuator 65 is moved to the position shown in Figure l, whereby the valve 92 closes the vent ports 91 and the valve 61 closes the outlet 26 to the steam generating chamber 13. Water is then poured through the inlet S3 into the fill tube 81 and ows into the reservoir 25 until the water reaches the initial level line A-A, closing the inner end of the till tube 81 to form the air pocket 89. The operator continues to `pour -water into the ltill tube until it reaches the top .of the .ll .tube 81, and .thusthe,lattercarries-the water which is to be added to completely till the reservoir. Thereafter the valve actuator y65 is moved to the position shown in Figure 2 to shift the valves 92 and 61 to their open positions. Movement of lthe valve 92 to its open position vuncovers the vent ports 91 to permit the trapped air -in the air Vpocket 89 to escape upwardly through the water in the lill tube 81, and as the air escapes the water in the fill tube enters the reservoir and increases the quantity yof the water therein to the level line B-B at the upper marginal walls of the vent ports 91. The volume of air released through the vent ports is substantially equal to thewater in Vthe -iill tube so that the latter does not retain water above the level line B-B.

Movement of the actuator 65 to the position Yshown in Figure 2 .causes the valve 61 vto uncover the outlet 26 so that .water may llow into the chamber i3 where it is converted into steam and escapes through the passages 14 onto the material being ironed. When steam is no longer desired :the valve `61 is closed by moving the actuator 65 forwardly .and the latter is held in this position by the spring 71.

While I have shown and described but .one embodiment ,of my invention, it is to be understood that this embodiment is to be taken as illustrative only' and not in a limiting sense. 11de not wish to be limited to the particular structure shown and described b ut to include all equivalent variations except as limited by the scope-ofthe claims.

1. A steam iron comprising a steam generating chamber, a water .reservoir having an outlet for feeding water into said steam generatingy chamber, a lill tube attached to said lreservoir and having its inner end terminating below the upper wall of said reservoir thereby forming an air pocket therewith vand to limit the initial quantity of water discharged intosaid reservoir from said lill tube to a point 'level with `the :lower end of said tube and thereafter maintain water in said fill tube, means defining vent ports leading ato said air pocket, and valve means controlling said lvent ports movable to a first position to close said vent `ports and seal said air pocket, and movable to a second :position to open said vent ports for escape of trapped air gfrom said air pocket to permit water remaining in said lill ,tube to enter said reservoir and increase the quantity of water therein.

A2. A steam iron as defined in claim l wherein said vent ports are arranged in said air pocket to limit the maximum amount of water admitted from said 'lill tube to Said ,reservoir upon moving said valve means Ato uncover said vent ports.

3. JAsteam iron as defined in claim l and second valve .therewith .to -close said outlet Ato passage Ao il means connected with said valve means for operation .water 1from said reservoir into said steam generating chamber when said valve means is in its said iirst position, and to open said outlet when said valve means is in its second position.

4. A steam iron comprising a sole plate having a pressing surface, a steam generating chamber, a water reservoir having an outlet for feeding -`water to said steam generating chamber, va -vll tube :attached no said reservoir and projecting upwardly therefrom forming a water lling opening for said reservoir when :the iron `rests `upon said pressing surface, the inner end of said vlill tube terminating :below -the upper wall of said reservoir thereby iorming an air pocket therewith limiting the initial quantity of water discharged .into said reservoir from said ll tube to a point level with the lower end of said tube and maintaining water in said filltube above said air pocket, means defining vent ports leading to said air pocket above said level, and valve means controlling said vent ports 'movable to a lirst position to close said `vent ports and 'seal said air pocket and movable to a second position to open said vent ports for Vescape of trapped air from said air pocket to permit water remaining in said till tube to enter said reservoir and increase the quantity ot' water therein.

5. A steam iron as dened in claim 4 and second valve means connected with said valve means vfor operation therewith to close said outlet to passage of water from said reservoir into said steam generating chamber when said valve means is in its said first position, and to open said outlet when said valve means is in its said second position.

6. In a steam iron, a steam generatingchamben a water reservoir having an outlet for feeding water into said steam generator, ,a till tube attached to said reservoir for entrance of water, means extending below the upper wall of said reservoir to limit the initial quantity of water discharged into said reservoir from said fill tube to a point level with the lower end of said means to `thereby form an air pocket and thereafter maintain water in said fill tube, means defining vent ports leading to said air pocket above'said level, and valve means controlling said vent ports movable to a first position to close said vent ports and seal said air pocket, and movable to asecond position to `open said vent ports for escape of trapped air from said air pocket to permit water remaining in said ll .tube to enter said reservoir and increase the quantity of water therein.

References Cited in the file of this patent UNITED STATES PATENTS 2,302,476 Rubinstein Nov. 17, 1942 2,384,839 Kistner Sept. 18, 1945 2,499,185 Finlayson Feb. 28, 1950

Images