US1435096A - Thermostatically-controlled sadiron - Google Patents

Description

J. A. AMELIANOVICH. THERMOSTATICALLY CONTROLLED SADIRON.

APPLICATION FILED JUNE 29, 1922. I 1 43 5 Patented Nova 7, 1922.,

2 SHEETS-SHEET l.

J. A. AMELIANOVHICH.

THERMOSTATlCALLY CONTROLLED SADIRON.

APPLlCATlON FILED JUNE 29,1922.

1A35fi9i6 Patented Nov. 7, 1922.

2 SHEETS-SHEET 2.

v To allwklom it won, a citizen of Russia,

Patente d'Nov. I, 1922.

true star JOSEPH A. amnnmnovrcin, orcnrcaeo, warriors.

rnEamosrA'rIcAtLr-comnotnnn sanrnoir,

Application filed 3une 29,

may concem: I Be it known that I, JosnPH A; AMnLmNohaving declared my 'in-tentionof becoming a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois,

.have invented certain new and useful Improvements in' a Thermostatically-Oontrolled Sadiron; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference -marked thereon, which form a part of this specification.

This invention relates to a thermostically' controlled and electrically heated sad iron.

In such a sad 1ron,'a common construction exists in providing an expansible member that will expand and flex away from a contact at a predetermined heat in order to break the electrical circuit that heats-the iron. As the ironing heat is usually above the fusing point of most metals, the expansible member would freeze or become partly welded to the contact so'that the circuit would not be broken at.a predetermined heat, rendering the thermostat inoperative thereby. And in cases where the expansible member did flex away from thecontact to some extent, the current would jump the gap and spark. An attempt has been made to remedy this defect by placing a condenser in the circuit; but such condenser did not overcome the freezing together ofthe contacts, so that no satisfactory thermostatically controlled-sad iron is now .upon the market.

It is anobject of this invention to overcome the above noted defects in providing contacts that will not freeze. together an ,v

that will eliminate monly used. I

It is a further object of this invention to provide a novel sad iron structure in which the condenser now com the thermostat is located substantially centrally-of the iron at the point ofgreatest heat in an improved manner. I

With these and other objects in view which will become more apparent in the following description and disclosures in the drawing, the invention comprlses the novel 1922. Serial no. 571,737.

Figure 2 is a top plan View of the interior of the sad iron with both the handle and upper hOllSiHg removed. Figure 3 is anenlarged elevational view of the thermostat connected in an electrical circuit.

Figure 4 is a section on the line 4--4= of Figure 1.

igure 5 is a section on the line 55 of Fi re 1 I igure 6 is a longitudinal vertical section through the sad iron with the handle in elevation.

In the exemplification of this invention, there is illustrated a sad iron comprising a base member 1 having a central longitudinallyextending recess or cavity 2 in which a pair of posts 3 are secured, upon' which a pair of flat thin bars 4 and 5.are mounted and insulated from the posts by insulating washers or tubes 6. The ends of the bars 4:. and 5 are in contacting relation, but the medial portion of the bar 5, which in the present instance is the lower bar, is bowed away from the bar 4. The bar 5 is made. of some resilient material having a large co-efiicient of linear expansion. and maybe termed an expansible member.

At the center of the bar 5, and uponthe upp r side, a contact member 7 having a fusing point higher than the necessary or predetermined temperature required for'ironing purposes is secured. The contact member preferably is made .of tungsten steel as it is the only satisfactory metal I have and bar 5.

I. securely anchor the Just above the base 1 the electrical heating means 9, which is usually some high resistance, may be positioned, so that the expansible member 5 is located therebeneath. And over the top of the electrical heating means there is positioned an enclosing member of suitable metal or the like which is secured to the base member 1 by means of screws. 11 and nuts 12. The enclosing member 10 is hollowed out upon its underside corresponding to the recess or cavity 2, and a hollow internally screw threaded and headed member 13 extends through an aperture centrally of the hollowed out portion of the enclosing member 10 and is suitably insulated'therefrom and clamped thereto by a nut 14. The hollow member 13 is in axial alinement with the tungsten contact 7 andis I adapted for adjustably receiving a contact screw 15 preferably .having a lower contact portion of higher fusibility than the ironing temperature.

tungsten. The screw 15 is adjustably held in the hollow member 13 and extends through an aperture in the plate 4 and int contact with the contact member 7.

The enclosing member 10 is provided with a plurality of insulated posts or terminals for the ingress and egress of the electrical current to the heating medium. The current may enter through the terminal 16 which is electrically connected. to the expan'sible member 5 by a conductor 17 (Figure 2). The current will flow from the expansible member 5 through the screw 15 and through an electrical conductor 18 connected to the screw at one end and connected at its other end to the terminal '19 which in turn is suitably connected as by a conductor 20 with the heating resistance 9. After the current traverses the heating means or resistance 9 it emerges through the terminal post 21 which is connected to the resistance by a conductor 22. The top of the sad iron is formed by a cover 23 which is provided with downwardly extending flanges which fit in rabbets formed enclosing member 1. The the screws 11 are reduced extend through apertures in the cover 23 for in the base 1, the rear end of the cover being provided with a hollow extension for receiving the electrical conductors as usual. The cover is so constructs that its upper part will be in spaced relation to the resistance upper portions of in diameter and receiving the handle 24; nuts 25 being threaded upon the upper ends of said screws 11 'for securing the cover and handle'to the base 1. a

The upper end of the screw 15 is likewise reducedand extends through an aperture in the cover 23, the upper end of said screw 15 leavinga pointer 26 rigidlyattached thereto for varying the tension point than the necessary or usual The contact screw 15 may be" made of tungsten steel or the like, or the lower contact portion only may be made of tating the pointer 27 to the point of the scale denoting the desired temperature, the screw 15 will be slightly raised or lowered of the expansible bar 5 so that the expansion thereof will break the contact at the predetermined temperature. v

In Figure '3' is diagrammatically illustrated the thermostat in an electric circuit, the current entering through the wire a passing through the bar 5, contact screw 15, the heating resistance, and emergin through the conductor 7). It will be evident that when the bar 5 expands it will flex away from the contact screw 15.

It is characteristic of this invention that the thermostatic contact members or ints consist of metal having a higher usion ironing temperature, so that the contact members will not become frozen or partially fused together during the use of the sad iron. further a characteristic of this invention that sparking between the thermostatic contact members is eliminated by the character of It is the metal of which the contact members are made and no condenser is necessary in the circuit. It should also be noted that the thermostat is located centrally ofthe iron be; neath the heating resistance medium so that the true temperature is controlled.

I am aware that numerous details of construction may be v'aried through a wide range without departing from the principles of this invention and Itherefore do not purpose limiting the patentgranted otherwise than necessitated by the prior art.

1 claim as my invention:

1. In a sad iron, a' heating resistance, means for passing an electric current ther through including a contact member of tungsten steel, and an expansi'ble bar having a contact member of tungsten steel normally engaging said first contact member, said expansible member being actuated by heat emanating from'said means to separate said contact members.

2. In a-sad iron, a heating. element, means for passing an electric current therethrough,

including an adjustable contact member embodying a temperature indicator and having a contact terminal of tungsten steel, and an expansible member having a contact portion of tungsten steel normally en aging the contact terminal of said first mem er.

3. In a sad iron, an ironing base having a substantially central and longitudinallyextending; recess, a pair of spaced posts in said recem, a resilient and expansible strip having acontact member of tungsten steel supported on said posts, an enclosing member superposed. on said base, a rotatable screw supported by said enclosing member and having a contact end of tungsten e l subscribed my name in the presence of two normally engaging said contact member, a subscribing Witnesses.

heating means associated with said base, and

electrical connections: for passing a current JOSE-PH AMELIANOVIOH' 5 through said means, expansiblemember and Witnesses:

screw.

SPENCER W. GIBBS, In testimony whereof I have hereunto OSCAR HARTMANN.

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