Changes Electrical Energy into Heat Energy

CHAPTER I
INTRODUCTION

A.        Problem Background

Iron comes from the Dutch language, which means Strijkijzer remove wrinkles from clothing with heated tools. Irons own concepts of Chinese coming century BC. At that time, they use long-handled iron pan containing coal. Electric iron was first patented in 1882, but at the time the invention was not a success because it is difficult to use and not many people who have electricity at home. At the beginning of the 20th century, electric irons and eventually became popular in the 1920's appear electric iron with temperature control. Ages 21 Iron that we often use today must have been a much more sophisticated and easier. In addition to temperature control there is also equipped with a container of water that we can spray at the same time we are ironing.

At the end of the 19th century around the year 1870, a housewife named Mary Florence Potts in Iowa found the print iron (cast iron). Iron is actually an iron sadiron the two edges are made sharp, so that the ironing easier. In the following year Mary also made a new discovery that is sadiron with handles that can be separated, so that the handle does not come sadiron sadiron hot when heated.

Basically, the inventor of the "old iron" can not be determined exactly because there is no historical evidence to explain it. However, many people who believe that iron was discovered by Henry W. Seely in 1882. Later Crompton and some rekanya, then Earl Richardson and Joseph Meyres the tune of electricity, so in 1962 strika found strika steam.

B.        Problem Formulation

Æ  What happens now when the iron is not found?

Æ  What are the komponem-komponem of electric irons?

Æ  Why the electric iron bimetal strip is used?

Æ  What is the function of an insulator in electric iron?

Æ  How to work on electric irons?

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