Popular science monthly . Insulated Po/nf tT/bratinyBe// Closed C/rcuil Ba/lin ^Double Pole S/xip5wlch to sefAlam,mm Bell Open Circuif Bel/, once a/cu/f/las i?een opened ellQUpen Orcuif local 8a/liry riq d S /nsuia/ed fb/lTe/eynfp/y Pe^\AnnorK/ofor?2^. P/a//num Pcvnt This point IS insviT/b/from fran?e butnafrom arma/ureyi/mi/ino3f// Alarm -Dool>le f^/e Snap Suite/?Contacts Closed Circuit Battery /o reset A/arm Fi^ e Wiring diagrams of a five-bell electricannunciator system nected as shown inFig. (e). The currentflows through thecontacts and thecoils of the relayto the armature ofthe relay t
Popular science monthly . Insulated Po/nf tT/bratinyBe// Closed C/rcuil Ba/lin ^Double Pole S/xip5wlch to sefAlam,mm Bell Open Circuif Bel/, once a/cu/f/las i?een opened ellQUpen Orcuif local 8a/liry riq d S /nsuia/ed fb/lTe/eynfp/y Pe^\AnnorK/ofor?2^. P/a//num Pcvnt This point IS insviT/b/from fran?e butnafrom arma/ureyi/mi/ino3f// Alarm -Dool>le f^/e Snap Suite/?Contacts Closed Circuit Battery /o reset A/arm Fi^ e Wiring diagrams of a five-bell electricannunciator system nected as shown inFig. (e). The currentflows through thecontacts and thecoils of the relayto the armature ofthe relay to theframe of the relayand back to thebattery. The plat-inum point of therelay is toward thecoils and the arma-ture must be drawnover toward thecoils before the cir-cuit is completed itwill be held by theaction of the arma-ture. A switch isprovided for clos-ing the circuit. Thebell is connectedacross another bat-tery, although itcould be connectedthrough the sameone. The currentfor the bell passesthrough the arma-ture of the relayand the e.\tra plati-num [loint on therelay which is in-sulated from theframe. As the cir-cuit through thecontacts is broken,the spring will pullthe armature awayfrom the contactpoint toward thecoil and a
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
