How to Install Electric Bells, Annunciators, and Alarms
How to Install Electric Bells, Annunciators, and Alarms

How to Install Electric Bells, Annunciators, and Alarms

How to Install Electric Bells, Annunciators, and Alarms. - Including Batteries, Wires and Wiring, Circuits, Pushes, Bells,...
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SKU: gb-57391-ebook
Product Type: Books
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Author: Schneider, Norman H. (Norman Hugh)
Format: eBook
Language: English
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How to Install Electric Bells, Annunciators, and Alarms

How to Install Electric Bells, Annunciators, and Alarms

$104.11 $52.03
How to Install Electric Bells, Annunciators, and Alarms

How to Install Electric Bells, Annunciators, and Alarms

$104.11 $52.03
Author: Schneider, Norman H. (Norman Hugh)
Format: eBook
Language: English
Description

How to Install Electric Bells, Annunciators, and Alarms. - Including Batteries, Wires and Wiring, Circuits, Pushes, Bells, Burglar Alarms, High and Low Water Alarms, Fire Alarms, Thermostats, Annunciators, and the Location and Remedying of Troubles

An electric bell depends for its action on the fact that a piece of iron wound with insulated wire becomes a magnet and will attract another piece of iron just so long as an electric current is allowed to travel through the wire. The instant the current ceases, the magnetism also ceases, and the attracted piece of iron (termed the armature) is no longer held in contact. The general construction of an electric bell is shown in Fig.1. MM are coils of insulated wire wound on soft iron cores. A is a soft iron armature mounted on a flat spring so that it is normally kept a slight distance away from the soft iron cores. S is a brass screw with a platinum tip touching a platinum disc on a spring attached to the armature. When the push button P is pressed down, its two brass springs touch each other, the current from the battery cell B then flows through the wire W, through the push P, through the coils MM, along A to the platinum disc, out at S, which touches this disc, and back to the battery. ......Buy Now (To Read More)

Product details

Ebook Number: 57391
Author: Schneider, Norman H. (Norman Hugh)
Release Date: Jun 25, 2018
Format: eBook
Language: English

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