US1206301A - Electric flat-iron. - Google Patents

Description

E. A. CARSON & J. ATHERTON. ELECTRIC FLAT IRON. APPLICATION FILED APR.2e. 1916.

25 -Z'awarad 622713027.

five/12 0215.

UNITED STATES PATENT OFFICE.

EDWARD A. CARSON, 0F COMPTON, AND JOSEPH ATHERTON, 0F REDONDO, CALIFORNIA.

ELECTRIC FLAT-IRON.

Application filed April 26, 1916.

To all whom it may concern Be it known that we, EDWARD A. CARSON and JOSEPH ATHER'roN, citizens of the United States, residing at Compton and Redondo, respectively, in the county of Los Angeles and State of California, have invented new and useful Improvements in Electric F lat-Irons, of which the following is a specification.

This invention relates to an indicating device, and particularly pertains to an indicator for use upon electrically heated appliances in which the heating element is concealed from view.

It is an object of this invention to provide indicating means in connection with concealed heating elements used within flat irons, percolators, and the like, whereby the presence of an electric current within the heating element will be indicated in a visible manner.

A further object of this invention is to provide a current indicator which may be readily applied in connection with an electric heating element and will indicate the presence of the current and approximately the heat being developed within the device.

Another object is to provide a device of the character described which is cheap to manufacture and is not liable to get out of order.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawings in which:

Figure 1 is a View in perspective of an electrically heated flat iron equipped with the indicator device. Fig. 2 is a view in vertical section taken through the nose of the fiat iron and shows the relation between the indicating device and the vital parts of the iron. Fig. 3 is a View in perspective of the sole plate of the flat iron with the heating element mounted thereupon and with parts broken away to show the manner in which the indicator is mounted; and showing a diagrammatical View of the current supply in connection therewith.

Referring to the drawings, 10 indicates a fiat iron of common construction and comprises a handle 11 which is mounted upon a cover portion 12. The cover 12 is secured to a pressure plate 13 within the iron. The pressure plate is in turn secured to a sole plate 14 by means of screws 15. A heating Specification of Letters Patent.

Patented Nov. 28, 1916.

Serial No. 93,761.

end of each unit is connected to contact rib- V bone 19 and 20, the opposite ends terminating adjacent the nose of the sole plate as particularly shown in Fig. 3. The indicator device is applied at this point.

The indicator consists of a small helically wound member 21 formed of a resistance wire of the proper resisting capacity to cause flow of current from the heating unit 17 to 18 to heat it until it reaches a color that may be visible to the operator. The coil 21 is connected at its ends to the terminating ends of the resistant unit ribbons by means of conductors 22 and 23. As shown in Fig. 2, the indicator coil projects through an opening 24 in the nose of the pressure plate and is insulated therefrom by means of a suitable insulating wall 25 which is here shown as being of mica. In this manner the indicator is effectively insulated from the parts of the iron.

The indicator coil 21 is made visible to the observer through an observation window 26 which is cut through the nose of the cover plate 12. A piece of mica or other transparent material 27 is suitably held in position over the opening and prevents the escape of heat from the iron and the passage of particles of foreign substance into the heating element of the iron.

The operation of this indicator may be easily understood as it requires that current from a suitable electrical source of supply 28 be delivered to the contact ribbons 19 and 20 through conductors 29 and 30, the current traveling through the heating elements and the indicator coil electrically connected with and interposed between sa'd elements. The resistance qualities of the indicator coil 21 are such that instantly the flow of current will heat the coil and make it discernible to the operator. It may also be added that as the current continues to pass through the heating element of the iron, the indicator coil 21 will increase in heat accordingly and the operator by observing the color produced by the heat throughout the coil may, in an approximate manner, determine the heated condition of the appliance.

It will thus be seen that We have provided an indicator for use with concealed electrical heating elements which will simply and eflectively indicate the presence of current Within the element and the approximate heat being attained by said current.

While We have shown this device as applied to a flat iron, it is evident that those skilled in the art may make changes and modifications therein to adapt it for use upon other electrically heated appliances, Without departing from the spirit and scope of the invention as set forth in the appended claims.

We claim:

1. The combination of an electric heating element, a pressure plate thereover, the pres sure plate having an opening, a cover inclosing the heating element and the pressure plate, an incandescent electric conductor connected to the heating element and extending through the pressure plate opening, said conductor being located entirely within said cover, and an observation port formed in the cover, whereby said incandescent conductor may be observed.

2. The combination with an electric heating element, an incandescent conductor electrically connected with the heating element, a cover adapted to inclose said element, said conductor being located entirely within said cover, and a transparent observation window in said cover, whereby the incandescent condition of said conductor may be observed.

3. The combination with an electric heating element, an incandescent electrical conductor electrically connected in series with the heating element, apressure plate secured over the heating element, the pressure plate having an opening adapted to allow the incandescent conductor to extend upwardly through the pressure plate, an insulation lining fitted within the" opening through said pressure plate, a cover adapted to inclose the heating element and pressure plate, an observation port formed through the cover and a transparent closure fitted over the observation port whereby the condition of the incandescent conductor may be observed when a current is passing through the heating element.

. In testimony whereof we have signed our names to this specification.

EDWARD A. CARSON. JOSEPH ATHERTON.

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