US1374693A - Electric heater having heating fabrics - Google Patents

Description

F. E. B, vim?, ELEC'I'RIC HEATER HAVING HEATING FABRICS hPPLICATION FILED MAYII, |920.

www1 Apr. 129 mi.

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/NVENTOR FRENCH REPUBLIC.

ELECTRIC HEATER HAVING HEATING' FABRICS.

Application filed May 11,

To all iv hom it mm2] concern Be it known that l, FnaNg-ois' EMiLiEN BNDICT VEnNin, a citizen of the Republic of France, and a resident of 2G Rue de Navarian, Paris, France. have invented new and useful Improvements in Electric Heaters Having Heating Fabrics, of which the following is a specification.

The present invention relates to electric heaters of the kind in which the heating elements consist of heating fabrics formed for example by a weft of resistance wire and a warp of asbestos thread. a signal lamp being also provided to indicate when the apparatus' is working, said lamp remaining lighted as long as the apparatus is working.

In apparatus of this kind, the heating fabrics are usually placed vertically and parallel to eachother. This arrangement. however, is unsatisfactory since it allows a` free circulation of the air which cannot for this reason reach a high temperature.

According to the present invention. the

improvements consist in arranging the heating fabrics horizontally one above the other, so that-the air, heated by the lowest fabric. comes successively into contact with the fabrics above it and thus its temperature is progressively increased from one fabric to the other, and in connecting the signal lamp to the heating fabrics in such a manner thatv the intensity of its illumination grows according to the number of heating circuits put into operation.

The increase in the temperature of the air due to the particular arrangement of the fabrics, is further assisted by the fact that the convection current which is set up is slowed down by the resistance oll'ered to it by each fabric.

One forir if an electric heater constructedA according to the invention is illustrated inthe accompanying drawing by way of example Figure 1 is a view in elevation. the exterior covering being shown in section, and` Fig. 2 is a plan View thereof,l the exterior covering being removed;

Fig. 3 is a diagram showing the method'of mounting the signal lamp.

`On a frame a, shown for example as rectangular, supported on feet b and strengthened by cross pieces c, the heating fabrics Specification of Letters Patent.

` minals ,y so to 'metal cover n forming a chimney.

Patented Aapr., i2, 192i. 1920. serial No. ascesa.

the desired distance apart by means of tubie` lar insulating sleeves e port-ing bars f.

The fabrics il, d1, di are connected to terobtain according to the connection. the operation of a part or of the. whole of the fabrics; a signal lamp i. mounted in shunt across the common circuit fi-y', indicates. according to the intensitv of its illumination. the different stages ofi/the operation of the apparatus. the stages being established by two switches .7rd and /if2 which allow the operation of the circuits ij'}`1, [j jm. or e' j-j1 and jm.. As the difference of potential at. the lamp terminals. vai-ies proportionally to the intensity of the cu"- rent passing through the fabrics and as tins intensity increases from one circuit to the next. the intensity of the illumination of threaded on the supthe lamp thus increases with the intensity of the heating.

The whole arrangement is covered by a 'Ihis cover is provided on its periphery below the first hea-ting fabric with openings foi; the passage of cold air, and at its upper part with other openings for the escape of heated air.

rl`he.lowcr part of the frame a is open so as not to interfere with they inspiration of the air caused by the convection currents set up when the apparatus is working. The exchanges of temperature between'the heating elements and the surrounding air take place chiefly by convection in such a manner that the supports of the appai atus remain almost cold even at the maximum flow and temperature of the, air. l

The air heated by contact with the first fabric undergoes an increase in temperature; i

of the heating fabrics bottom and at the che number and constitucion each appsraius be varied.

Claims.

l. in electric heater, comprising heating fabrics arranged iiorizontaiiy one above 'the oher'7 a sheet nietai casing inciosing said hearing fabrics, :means for putzing into circuib adjustabie number of said heating iainfics9 sind means permitting the circula- JLion of air upward successively through said heating fabrics.

EZ. An eiecric heater, comprising heating fabrics arranged horizontally one above the other9 a sheet heatingfabrics, means for cuit an adjustable number of abrics, said casingr having openings at the top o the casing to per mit the upward circuiaiion of air through the fabrics.

An eiectric heaeers comprising heafcing fabrics srrsnged horizontafiiy one above che orhcin, a. sheet nietai inciosing said heating fabrics, ineens for putting into circuit an adjustable nnniberof seid heating fabrics, seid having openings at the putting into cirother, a sheet metal metal casing inciosing said A said heating y of the electrical heating circuits7 Lenses bottom and at the top thereof to permit the upward circulation or air through "che fabrics,.together with an electric signal cono nectedwith the eiectric circuis of the heating fabrics and var y'inggr its indicator with the number of heating circuits put into operation. y

4. An electric heater, comprising heating; fabrics arranged horizontally one above the casing inciosing said heating fabrics, means for putting' into circuit an adjustabie number of said heating fabrics, said casing` having openings at the bottoni and at the 'top to permit the upward :irculation of air through the fabrics, the electrical 'circuits of said heating fabrics comprising a common pari, and a signal lamp shunted across the said common part for the purpose described.

1n testimony whereof have signed my name to this specification.

,- FRA'QGS Efiibi" ZNECT 'v'i'liiiiii''.

Witnesses JACQUES ARMENGAUIL, PIERRE Anninresmr..

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