US1433061A - Electric flatiron - Google Patents

Description

EX AVERY AND O 0. FUSCH,

ELECTRIC FLATIRON, .IIPI IICATIQII FILED JULY :2, I920] 1,433,061. Patented Oct.24,1922.

FIGURE 1 FIGURE 2 Patented Oct. 24, 1922.

UNITED STATES PATENT OFFICE.

Em S. AVERY AND ORA 0. FUSCH, OF SAN JOSE, CALIFORNIA.

ELECTRIC FLATIRON.

Application filed July 22, 1920. Serial No. 398,196.

To all whom it may concern:

Be it known that we, EZRA S. AVERY and ORA O. F UsoH, citizens of the United States, and residents of San Jose, in the county of Santa Clara and State of California, have invented certain new and useful Improve ments in Electric F latirons, of which the following is a specification.

Our invention relates particularly to a means for controlling the flow of electricity through an electrically heated flat'iron. It isthe object of our invention to provide a means conveniently incorporated in the structure of the flat iron whereby a rise of temperature above a given point will automatically break the flow of electricity to the iron, and a corresponding drop in temperature will automatically close the circuit again. Also to provide suitable means of the character indicated which can be quickly and easily set to break the current at varying temperatures as desired or to break the current completely without the use of an additional switch and without disconnecting the iron from the supply connection. Still an.- other object of our invention is to provide an iron of the character indicated which is provided with an electric light element inserted in the Wiring system thereof and arranged to be visible to the operator of the iron thereby indicating instantly the breaking of the circuit from any cause whatever.

Other objects and advantages will appear in the followin description and in the drawing, in Wl1l(1- Figure 1 is a plan view of an iron embody ng ourinvention, the handle thereoi beingimi fl ved.

Figure-i2 slasectional view on line eferring' more particularlyto the drawing, 1 indicates the body portion of an electric flat iron having a suitable heating elementinserted therein at 2, connected to one plug terminal 3 by wire 4, the other plug terminal being-shown at 5 and a portion of the handle at 6 mounted on top portion 7 by screws 8.

On body portion 1 and beneath top -7 and one on each side of handle portion 6 are two posts 9 and 10 held in position by screws 11 and 12, the latter also binding to said posts the two ends of expansion member 13 having a contact boss formed on its central portion as at 14.

Mounted in vertical alignment with the axis of boss 14 is a screw provided with a contact point 16, both of electricity conducting material, the screw 15 being threaded into a bearing 17 mounted on handle portion 6 and extending downwardly through top 7 as-shown. The upper end of screw'15 is provided with a head 18 to which is attached a pointer 19 set to operate in conjunction with suitable indicia as ofi' warm? hot shown at 20, 21 and 22 respectively. ,The bindingpost 151718 .is connected by a wire 23 to the opposite end of the heating element 2 than that to which terminal 3 is connected.

Mounted on body 1 and within top 7 is a small electric bulb 24 visible from the outside through a window 25 in said top 7 and connected to post 10--12 by wire 26 and to terminal 5 by wire 27.

From the above description it is clear that when a plug suitably connected to a source of supply is inserted on terminals 3 and 5 the current will flow through the following elements -3-4-2-2315-16-1413 26-2427-5, thereby heating the iron and lighting bulb 24. The parts 1516-14.and 13 are so arranged that 14 and 16 are in contact when pointer 19 indicates warm or hot. If however, the pointer indicates warm and the iron itself becomes sufficiently warm to expand. strip 13, then the same expands and draws boss 14 away from point 16 and the circuit is broken and remains'broken until the temperature drops and permits strip 13 to contractfj ls'ufiiciently for boss 14-to again contact 15.

If the pointer. indicates hot ftheil the operation occurS 1-li1It he point ls bei gifid-i J v S qlllllled to separate boss'14 from point 16, jjlifl I t i an'ceda little alh-igher temperature;

e pointer indicates off then the threaded member 15 has so far withdrawn point 16 that contact with boss 14 is broken and no current flows.

It is to be understood of course that changes in form, construction, and details of operation may be made within the scope of the appended claims We claim p 1. In combination with an electric heater of the character described a current conducting element connected in series with the electric circuit of the heater and having a known coeificient of expansion, means associated with said element by which a predetermined amount of current is permitted to flow through said electric heater, and means visually indicating the degree of heat the electric heater will-attain before the circuit is broken I 2. In combination with an electric heater, a current conducting element connected in series with the circuit of the electric heater and having a known coefficient of expansion, means for suspending said element so that the same may sag when expanding, contact and connecting means by which the circuit of the electric heater will be opened" when said element has sagged a predetermined degree, and visual means for indicating the degree of heat the electric heater will attain before its cicuit is broken.

3. In combination with an electric heater of the character described, an electric conducting element having a known coeflicient of expansion connected in series with the electric circuit of said heater, means for suspending said element so that it may sag when expanding, a screw mounted above the point of sagging of said element and normally in engagement therewith, connectingmeans for placing said screw in series with said element whereby when said element sags a predetermined degree the circuit of the electric heater will be opened, and a pointer extending from said screw and a dial there- 4. In combination with an electric heater,

a thermostatic element, means for suspending said element so that the same may sag with the heating thereof, means whereby upon the sagging of the thermostatic element a predetermined degree the electric circuit of said heater will be opened, and means for visually indicating the degree of heat the heater will attain before its circuit is broken.

5. In combination with an electric heater, a thermostatic element, means for suspending said element so that the same may sag with the heating thereof, means whereby upon the sagging of the thermostatic element a predetermined degree the electric circuit of said heater will be opened, a contact point adjustable relative to the sagging portion of said thermostatic element and adapted to establish a circuit therewith, means whereby upon the thermostatic element sagging a sufficient degree to become disconnected from the contact point the electric circuit of the heater will be opened, and means actuated by the adjustable contact point adapted to visually indicate the degree of heat the electric heater will attain before its circuit is broken.

EZRA S. AVERY. ORA O. F USCH.

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