US906498A - Shunt or electrical resistance. - Google Patents

Description

- B. WESTON. SHUNT 0R 'ELEOTRIOAL RESISTANCE.

subject of the King of GreatBritain, and

fication.

v eiiect due to air circulation.

lengths of said short conductors or plates be- A andB represent the blocks or terminals,

" UNITED STATES PATENT orr cni EDWABD-WESTON, OF NEWARK, NEW JERSEY.

SHUNT OB ELECTRICAL RESISTANCE.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed March 15, 1907. Serial No. 362,463.

To all whom it may concern:

Be it known that I, EDWARD \V'ns'roN, a l

resident of Newark, county of Essex, and State of New Jersey, have made anew and useful Invention in Shunts or Electrical Resistances, of which the following is a speci- My invention is directed particularly to an improvement uponan invention disclosed by me in a patent granted by the United States Patent Oflice on the 16th day of May, 1898, and. bearing Number 497,482. In this patent I have disclosed a resistance designed for use in connection with systems of elec trical energy, such as electric light and high specific conductivity and heat absorbing capacity, and a series of interconnected short conductorsor plates ofrelatively high specific resistance, said conductorsor plates joining the two blocks or terminals together at their ends and being so located relatively thatthere is a free circulation of air between the plates themselves and around the ends thereof, for the purpose of giving. a cooling The present improvement consists in loeating the ends of the relatively large conducting blocks or'terminals in very close proximity to each other and in securing directly thereto at their opposite ends one or more short conductors or plates of relatively high specific resistance, and in such manner that the conducting blocks or terminals, by reason of their good thermal conductivity and large heat dissipating capacity, will conduct away and dissipate practically all of the heat which may be developed by the current in the free or exposed portions. or

tween them, the present improvement rely ing upon the conducting or heat absorbing effect of said blocks or terminals for the dis-' sipation of heat.

My invention .will'be fully understood by referring to the accompanying drawings, in which,

Fi 'ure'l is a plan view thereof; and Fig. 2 a slde elevational view as seen looking at Fig. 1 in either direction. Referring now to the drawings in detail,

the same being preferably composed of good conducting material, such as copper.

E, E are bolts for securing the terminals to the bus bars or current mains D, D. G, G, G represent short metal conductors or plates of relatively high specific resistance or poor electric conductivity as compared with that of the blocks or terminals A,-B and made of' any. of the well known high resistance alloys These plates are secured directly inthe ends of the blocks or terminals A, B in any preferred manner, as for instance by slotting said ends and uniting them together by solder or in any other desired way. 7

I, I represent two insulating bars or supports for securing the two blocks or terminals A andB in rigid relation to each other and with their adjoining faces relatively close together, this being effected by bolts H, H, H, as shown.

S, S are binding screws or posts, one in each of the blocks or terminals A, B, for securing conductors F, F adapted to be connected to a current measuring instrument, forthe purpose stated and in the manner disclosed in my before-mentioned patent.

Although I have shown a series of short conductors in the form of plates G, G, G

connected directly to the adjoining faces of the blocks or terminals A, B, I do not limit myself to any number of such plates, as obviously a single plate, bar, rod, or other conductor of this nature and of any width or cross section might be used, or any number thereof, or any type of conductor of relatively high resistance as compared with that of the blocks orterminals A, B; or, they may be disposed in relation thereto in any preferred manner, so long as the relations of conductivity, both as to electrical currents and heat,'is of such a nature that the con ducting blocks or terminals A and B will always convey away or dissipate practically all of the heat generated in the free or exposed portions of the-conductors or plates G, G, G, as fast 'as it is generated by the current passing through said resistances.

Having thus described my invention what I claim and desire to secure by Letters Pat-- ent of the United States is- 1. An electrical resistance embracing two conducting blocks-or terminals of relatively good conductivity and heat absorbing capacity, and one or more resistance conductors of relatively poor conducting capacity, so disposed in relation to said blocks or terminals that practically all of the heat generated in the relatively poor current conveying conductor or conductors will be absorbed bythe blocks or terminals 2.- An electrical resistance embracing means adapted to convey relatively large volumes of current without heatin and possessing relatively .large heat absor ing capacity; in combination with interconnected means of relatively poor current conveyingcapa'city asdcompared with the first-named 1 means, Sal

interconnected-means by the current flow will be absorbed by the first-named means.

. 3. An electrical shunt embracing two ter-j 'minals of largecurrent conveying and heat absorbing ca acityand an intermediate resistance of re atively'poor current conveying capacity so located with relation to thevtermmals that practically all the heat developed in the resistance will be absorbed by the terminals. a

4. A shurit for use in a system of electrical 3 distribution, embracing two'terminals of relativelyflarge current-conveying and heat absorblng capacity, and an intermediate resistance of 'relativelypoor current conveying capacity; in combination with means for connecting" the terminals to an electrical measuring instrument the two terminals and the resistancebeing relatively so proportioned and located with relation to each other that practically all of the heat developed in the resistance will be absorbed by the terminals.

- 5. A resistance device for use in systems for the distribution of electrical energy, embracing two itermina'ls of relatively large current conveying and heat absorbing capacc-ific. conductivity, andra zconductor of high specific reslstance and-shortv glength connect- 66 erated therein by t ity and an intermediate conductor of relatively poor current conveying capacity, said conductoriarfd terminals bemg so proportioned as to relative current conveying capacity. that .the terminals willabsorb practica-llyall'of the heat developedin the interanedia-te conductor.

6. A resistance device for. use with systemsv for the distribution of electrical energy, embracing two terminals ofrelatively goodc-urrent conveying and heat absorbing ingasaid blocks of metal, the free length of said conductor being suchvthat the heat gene passage of a current parts being so disposed relatively thatpractically all of the heat developed in the generated by the'passage of an electric curtherethrough, is conducted to and absorbed by said blocks of metal as rapidly as such heat is generated, whereby said conductor will not be overheated.

. 8. An electrical resistance device, -consist-' ing of a short conductor of high specific resistance, connecting two massesor blocks of metal of high specific conductivity, the free length of said conductor being such that the ducted to and absorbed 'by said blocks or masses of metal as rapidly as generated, whereby said conductor will not become overheated.

10. ;A resistance device for an electric circuit, comprising two blocks or masses of metal of high specific conductivity, and a conductor-of high specific resistance ,connecting said blocks or masses of metal, said conductorbcing of such small cross section "as to produce the desired resistance within suchashort length thereof, that the heat rent theret-hroughwill be conducted to and absorbed by the said blocks or masses of metal as rapidly as generated, whereby said conductor will not become overheated.

11L An electrical resistance device, consisting ofi two blocks of metal of high specific cond'nctivit and aconduotor of high specific resistance and short lengthconnecting said blocks ofmetal, thefree length of said conductor being such that the heat generated therein by the passage of a current therethroughfis conducted to and absorbed by 'saidblocks of metal as rapidly as generated, whereby said conductor will not be overheated, ,and means for connectingup said resistance device in an electric circuit.

12. An electrical resistance device, consisting of two blocks of metal of high s ecific conductivity, and'a conductor of high specific resistance and short lengthconnect- 12'0 ing said blocks of metal, the free length of sald conductor being such that the heat gen- .erated therein by the passage of a current theret-hrough, is conducted to and absorbed by saidblocks of'metal as' rapidly as'gener- 126 atcd, whereby saidconductor will not overheated, and a shunt circuit leading around'said conductor. I

13. An electrical resistance device,consisting of a short conductor of high spe- 130 cific resistance, connecting two masses or blocks of metal of high specific conductivity, the free length of said conductor being such that the heat generated by the passage of an electric current therethrough will be absorbed by said blocks of metal as rapidly as generated, whereby said conductor will not be overheated, a shunt circuit leading around said conductor and means for connecting up said resistance device in an electric circuit.

14. An electrical resistance'device, comprising two blocks or masses of metal of high specific conductivity located in close proxiinity to each other and a conductor of high specific resistance and short length having its ends embedded into said blocks of metal respectively, thereby leaving a short free blocks of metal of high specific conductivity embedded into said blocks of metal respectively, to leave a short free length of metal between said terminals.

16. An electrical resistance device, consisting of two blocks of metal of high specific conductivity and a'high resistance conductor connecting said blocks of metal, said conductor being of such short free length that the heat generated therein by the passage of a current therethrough is absorbed and dissipated by said blocks of metal as rapidly as generated.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWVARD WESTON.

Witnesses:

C. J. KINTNER, M; F KEATING.

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