US521168A - jungner - Google Patents

Description

(No Model.) Y E. W. JUNGNER. TEEEMO ELECTRIC BATTERY;

No. 521,168. 'Patented June l2, 1894.

Illllll AIC# inneren @desires ERNST WALDEMAR JUNGNER,OF SKRZ-l., SWE-EEN,

tessere-stoornis SPlEmICAGN forming part of Letters Patent No. 52l,68, dated l2, 18g-l. y

Application led March 9, 1894- ei whom it may concern: ,Be it known that l, ERNST WALDEMAR oneness, nsnbjectof the Kin g of Sweden and Norway, end e resident of Skere, in the Kingdom of Sweden, have invented certain new and useful Improvements in Thermo-Electric Betteries; endl do hereby declare the following to be sfull, clear, and exact description of the invention, such es will' enable others skilled in the srt to which it appertsins to ineke and use the seine, reference being-hed to the nccoxnpenying drawings, end to letters of reference marked thereon,v Which-forni a. part of inisispeciiicetionr This invention has relation to thermo-electric chain batteries, end has for its object e construction of chain battery more perticulerly ndepted for use with electric fire alarms, but may elso be used for other purposes.

Referring to the accompanying drawings which illustrate bye longitudinal sectional vieu` e'portion ofe thermo-electric chain bettery embodying my invention, EXE', E, dac., indicate the elements of the battery each composed of two strips or pieces, preferably wires, e end e of dierent metals, as for instance, copper and viron Wires connected vin series by overlapping the ends of two wires of different metals e e', binding them together by ineens of e good.` conductor of electricity, as :tor instance, ne iron Wire, and then coinpletingthe joint by lorezing or soldering, as shown et e3. The alternate joints of the 'eleniente E E3, dac., of the chain battery are suitably insulated by ineens of- 'e non-conduotor oflieet, end l have found that excellent resulteV are obtained by winding the seid joints 'with cotton or cotton thread or yarn, es shown et c, of, and in practice I preferably insulete the Whole of the .elementswith the exception of the joints en opposite sides of the one tiret is insulated, es shown.

The length and diameter of theinetal strips, pieces, or wires e e may be greetlyveried-eosending to the uses made of the chain, espeeielly when it's'not desirable or necessary to oiotnin the best possible results with the leest' nnmoer of elemente, since the 'resistance increases with the length of the element wires, the ei'ect produced bei ng correspondingly reduced. On the other h'snd, il' the Wires of the elements ere too short the trensmission et Serial No: 502.990- Cilo model.)

heet from the nelrcd to the insulated joints is too rapid, or, in other wordsthe battery is excited by too sliglits verietion in the tein-V pere'ture of the ambient nir, freni the normal.

. l have found that when the thermo-electric chain battery is .to he used in connection with 'electric tire alarms, excellent results are vob'teined. by 'using copper end iron wire of e diameter of about one to 1.5 millimeters, end of e length of lshout forty to ifty millimeters, thus forming elements of from seventy to eighty millimeters, or from fifteen to twenty elements to the running meter of chein-- inasmuch es iron is not es goed e conduc- 'tor of heet its copper, lpree'r to use iron wire of greater diameter but shorter than the copperwires. in order that the best resnltsiney be obtained the extent o the insulated portions of the chain battery should be sui-tehly proportioned; if, for'nstence, the layer oinsulating materiel is too thick, theloettery will be energized by comparatively slight changes, v

in the temperature of the ambient eil' freine. normal. temperature; il", on the other bend,

the layer of insulating motorini is too thin,

the thermo-circuit is correspondingly Weekened, in feet, becomes too Week and of too shorte duration' for practical purposes. These diculties ere eiectually overcome by winding the joints in the form of e spindle, the layer of insulating materiel being thickest et the joint, and is gradually reduced in thickness from seid joint-toward or to the joints on opposite sides, es shownl.

lf etherxno-electric chain battery constructed es described,is.exposod to arepid change of temperature oit' snlcient intensity en elecI .tric current will be generated in the one or the other direction, which current continues until the naked es well es the insu-lated joints ere of the seine temperature, provided of course the ends of the chain are in conductive connection. The current generated is however Jtoo 'Week to perform useful Work, es for instance, produce enA audible or visible-signel, or both, in e tire alarm system, end .l 'connect the seme for such purposes with e sufficiently sensitive apparatus, such es e cir-- cuit controlling devicekthrough the medium ofwhich e battery circuit including elet-in derrises, is either closed or interrupted 'to gir-Je en ulerni.- For such purposes the chain betreo tery may, for instance, be arranged along the moldings of a Wall near-the ceiling-,and will remain unatected except by a rapid and suficient rise in the temperature of the ambient air, such as would be caused by the breaking out of a fire.

Having thus described my invention, what I claim as newtherein, and desire to secure by Letters Patent, is

1. A thermo-electric chain comprising elements composed of two strips or pieces of different metals, said elements connected in series, the strips or pieces of one kind ofjnetal alternating with those of the other kind and having alternate joints insulated by means oi a nonconductor of heat, for the purpose. set forth.

2. A thermo-electric chain,comprising elements com-posed of two strips or pieces of different metals, said elements connected in series, the strips or pieces of one kind of metal alternating vvith those of the other kind and having alternate joints insulated by means of a non-conductor of heat, said insulation being of greatest thickness at the joint and decreasing in thickness in opposite directions. 3. A thermo-electric chain, comprising alternate overlapping pieces or strips of diierent metals, as alternating copper and iron wires, the overlapping portions. united by means of a conductor of electricity as fine iron wire and by braz-i-ngcr-seidering, and having its alternate joints insulated by means of a non-conductor of heat, for the purpose set forth. In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ERNST WALDEMAR JUN GNER.

Witnesses:

A. J. HOLMBCK, JOH. GEW BUTscH.

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