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As with all of my Reinventing Science kits, there is much more to each kit than what comes in the box. I support educational users of the kits with many free resources online, a fan page and community on , and videos on YouTube. Some of the resources available are a bibliography and reading list about telegraphs, electromagnetism, and invention, a list of science standards addressed by the kit, and other tips and tricks for using the kit.

Anatomy of a Real Telegraph, permission to use granted by Harris Educational

Teacher Tip: To improve coil winding (for neater more efficient coils) I also built in a coil winding arbor into the telegraph sounder mechanism. This arbor works along with the coil winding bobbins included in the kit. Simply place your hookup wire into the retainer clip in the coil and then place the coil into the coil winding arbor hole in the sounder. {full instructions with illustrations are included in the kit’s manual} It’s possible for one person to wind the coil by themselves by using a screwdriver to turn the coil bobbin but it’s easier for two or more students to wind each coil. One student can hold the sounder mechanism, another can turn the coil bobbin, and a third can guide the wire. The end result, much neater coils done in less time.

Telegraph Science Project - Education Bug

Or were each an independent revolution without consequences on the others....

These materials can also be used for your presentation.
Build a doorbell, telegraph system, even a catapult, using a true electromagnet.

Electromagnet Science Set includes several introductory experiments in magnetism as well as six complete electromagnet projects.

One of many endless questions, when he first started learning about telegraph during the Civil War was, "what kinds of insulators were used?" This page will to address this question.

Reinventing Morse: Build your own Telegraph | …

Using a reference written by combined with photographs taken during the Civil War, we can better determine what insulators were used. Primarily, glass insulators were the insulator of choice during the Civil War. Iron hook insulators, what we now call "ram horns", were also used. However, we find mention of their dislike in Prescott's book "History, Theory and Practice of the Electric Telegraph". It was thought that the iron in the insulator attracted lightning. What they were not able to yet distinguish is that although the iron was embedded in a wood block and attached to the telegraph pole, the wood block and the pole it was attached to was a much poorer insulator than a glass insulator mounted on a wood pin.

Iron hooks and threadless glass insulators were the preferred insulators of the time. More than likely, this is due to their abundance in production. Below you'll see photographs of insulators used in the Civil War. There will always be a debate about what insulators were used by who. Primarily, iron hooks and threadless glass insulators were used by the civilian telegraph companies and the USMT (since it was run by civilians). The flying telegraph, operated by the Signal Corps for a good portion of the war, used wood lances. From their description in both William Plum and Willard Brown's book, we know these had no further insulation since the wire was gutta percha covered wire. The lances were 12 and 10 feet in length and had notches cut into them for the wire.

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Advantages of the telegraph | Article about …

In 1847, Samuel Morse received the patent for his invention of the telegraph. Many years before cell phones, the only method of communication was sending someone a message by a horse rider. The telegraph became the first method for instant delivery of messages and the starting point for future technology. Follow these steps and you will be sending Morse Code messages using your very own telegraph.

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If you are a science teacher who has ever taught a physical science class or attended a physical science workshop then you’ve probably done the activity where you wrap a piece of magnet wire around a nail and use it to make a paper clip or another flap of metal move in response to an electrical current flowing in the wire. This experiment is often called “building a telegraph” and its a good way to illustrate electromagnetism. The experiment usually goes over well with students, but from experience I’ve found that this simple activity has a lot of stumbling blocks for younger kids and have always thought that it should be possible to teach MORE with your half hour or less activity time. To that end I’ve created the science kit. This article will explain some of my educational design choices for the kit and give teachers or anyone using the kit for educational purposes a few tips to help them in the classroom.

Find out information about Advantages of the telegraph

Fun Fact: Even though making a piece of metal slap into another piece of metal using an electromagnetic field makes a click, this kind of simple apparatus is not actually a telegraph sounder. To be a true telegraph sounder the device must be capable of making a click on both ends of its travel. This is how a telegraph operator can distinguish dots from dashes, by noting the time difference between the up and down click’s for each “bit” of code that comes through. Reinventing Morse is designed to operate as a real sounder because the arm makes a click on both ends of travel.

Make Your Own Telegraph - Battery KidsBattery Kids

To make my telegraph into a device that can produce measurable quantities I did two things. Firstly, I used a sounder bar that can act as a lever when attached to a force gauge (or a force sensor from a data-logging or probeware set). Secondly, I included two coil winding bobbins so that students can make two different coils of different measured lengths and then use a force sensor in order to determine the effect of wire length on magnetic field strength.

4 Responses to Make Your Own Telegraph

Teacher Tip: To measure the force of the electromagnetic field simply connect a to the sounder arm, engage the circuit so that the electromagnet is turned on, and while one student holds down the telegraph base another student can pull up on the force gauge until the sounder arm can be pulled away from the electromagnet. A third student can watch the force gauge and record their observation.

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