US980884A - Lightning-arrester. - Google Patents

Description

N. E. NORSTROM. LIGHTNING AERESTER.

APPLIGATIQN FILED OUT-'14, 1995. RENEWED AUG. 28, 1909 980,884. Patented Jan.1 911.

LIGHTNING-AZ NURSTROM, OF CHICAGO, ILLINLIS,

66 MANUFACTURING GSL, '82? f iLhSi. Specification D Letters intent.

implication. filed October 14, 1905, Serial No. 2823,?

EIBEREQN ELECTRIC Serial 1.-To. 5515,100.

oil/T whom, -55 may conccm:

' o it known that 1, Nuts EHEL Nons'iinon, iacon oi the United States of i\l1l1lCfl,

ninl :i vesirlont of Chicago, county of'Coolz.

11nd i'iilelli. of Illinois, have invented Certain a oi esl'vi's, of which the tolloxi 'ing is a speoilimimn.

invention relates to'ligl-itning nrres 's of a; kind used on telephone and tele- ZliHl has for its object improvein such (lGYlCQS.

izeoinpnnying drawings, which are 3 full size, Figure l is n phi-n;

.s side elevation; and Fig. 3 is :1 sec.-

lino 3 3 Y V i he i iwune o l ilfll'. "hoe shaped piece A of porcelain other i sulating material. Near the ends oi is piece are transverse V-shnpetl moves in which are held Cili'liiGll lese carbon blocks are hehl. in iii-ass clamp bars C, and bolts tonil through the piece A as The bolts C are also usetl i g )Sl'H for connecting the two hizinehos of the telephone or telegraph line in the two hmnohes which extend to the -E ")l.l0i"itl or telegraph instrument nseti. of the mi'oon blocks 0 is secured inside llOH sleeve D which is somewhat The oi'tei' ihnn the block held by it.

other enrhon block, however, is without any holly of magnetic material secured thereto.

The rear face of the piece A has a. recess l filiilil in its central portion as shown in IiU'llFUtl to the metal bin. E by the sci'ews l) is n. elovh spring S, in the center of tho oils oi whivh is held. a .u'hon block B of l I I The ining H is mljusled so that when the piece i is summed to n Hill or other support, the .tis of the carbon blool; B is normally in no with (he nxes'of the blocks J. The o the block B have secured to them 5 is of mica. 13 which intervene beo )looh' B and the adjacent: bloeks C. lhose sir ps of mi ".1. are simply spacing which. cover only a small part of the if 1 S, and in this recess is ii metal bar E seemed to the piece A bjybolt E and screw i 1 'lhe bolt E also serves as a binding; post from which there is a conductor E exlemling to :1 ground connection.

,W and useful improvements in Lighti'iingi'aoc il block is but which serve to prevent nviiuil eon'lzie" between nncl (h i. it; eirres'ieir it is secured 'i all. post, Oi other supn by siri'oivs through the holes A". -The block SHPpOllHl upon the spring S, is pei'ini t l 1 l 4 e blovl; l; which is freely supported oz in spring; 573., does not touch tho other iJlOL when the springis in a quiescent si to, or in a state which 21pnearly to the quiescent. One

, himling osis C and the other L one o1? t connected to the two w iii-e other inst U. ginolin Wire is then eon 1 i 1 "w nooml to (no p wzincl "TO ground. When the ilovice set in in this way the spring l l a bsolutely oiosrllQ/VQK, jam; in the bnihling even o than it person walking on an i )or, or the Wind blowing outside, nova. spr n (l to vibrate so as to move the block ll with respect to the hlovl'. This continual vibration of the hlocl; H "with resoeot to the blocks G serves to pi'oveiu. (lost from settling on the faces of the ll'lOCliS zincl. and thus grounding the line i ssot up, the IHlCEL'fRCGd Vllil'illllljgj h does not shoi't circuit a telephone 01' n telegraph circuit passing through the hincling posts (1 but When lightning: l'i-ikos one oi the line Wires, the high potnntinl of" the charge causes it to are n hloch I to block B, and it then it? STzllllg i i, the hay E, post to wound. The passage through the coils of the spring is sets up lines of tones between nnwnotie lobcly of the then connected to to shake out dust and chips of carbon due to the are from C to B. The device is therefore self-cleaning, not .only under normal conditions, but under the conditions arising from acting as an arrester.

What I claim is 1 The combination with a supporting frame, and the conductors of a circuit, of a carbon block connected to each conductor and adjustably supported on the frame, a spring having one end secured to the frame, a third carbon block secured to the other end of the spring and supported adjacent to the first mentioned block, and a ground connection for the third block.

2. The combination with the conductors of a circuit, of a carbon block connected to each conductor, a spring having one end connected to a fixed support, a third carbon block connected to the other end of said spring and supported closely adjacent to the first mentioned blocks and a ground connection for said third block.

3. The combination with the conductors of a circuit, of a carbonterminal connected to each conductor, a spiral spring secured to a fixed support, a third terminal supported on the tree end of said spring and of a circuit, and a terminal connected to each conductor, of a conducting block sup ported adjacent to said terminal, a ground connection, a metallic coil interposed between said block and said ground COIIHGC-v tion, and a magnetic body associated with one of said terminals.

5. The combination with the conductors of a circuit, of a horse-shoe 1aped frame of insulating material provided with binding posts to which said conductors are connected, carbon blocks located in recesses formed in the legs of said frame, electrical connections from the binding osts to said carbon blocks, and a roun connection provided with a mova le terminal supported between said blocks.

Signed at Chicago, 111., thislOth day of Oct. 1905.

NILS EMEL NORSTROM.

Witnesses g A. L. BUCHANAN, C. L. REDFIELD.

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