Milwaukee School of Engineering - EMF Yearbook (Milwaukee, WI)

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MY TESLA TRANSFORMER I o clay there is a broad field open for the experimenter in the study and development of the so-called High Frequency Curents. The transformer to produce these High Frequency Currents was invented by Xikola Tesla, but many young experimenters have successfully made one in their own shops. 1 myself have one of these coils, which I made from materials at hand in my shop. A picture of this coil is seen below. This Tesla coil, as it is called after its inventor, is perfectly harmless to thti body, except that if the spark jumps direct to your skin it will burn the flesh. The Tesla coil which 1 made is eighteen inches long, eight and one- half inches wide and twelve inches high. The secondary coil is eighteen inches long and five and one-half inches in diameter wound with number thirty-six silk covered copper magnet wire. The primary coil is eight and one half inches in diameter wound in eighteen turns of number eight copper wire. 'I'his Tesla coil will give a four-inch spark by using a one inch spark coil and a very small glass plate condenser. L use the one-inch spark coil on the light circuit of one hundred ten volts by means of an electrolytic interrupter which I made myself. 1 made all the apparatus used in my high frequency current experiments, which includes the interrupter, spark coil, glass plate condenser, spark gap and Tesla coil. In addition to these experiments 1 have experimented in wireless teleg- raphy and with the arc furnace. I have a small wireless outfit and an arc light, both of which I constructed mvself. ELBERT FLOYD NICHOLAS. Ferris. Texas. P.iye Three Hundred Thirty-five

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■ i • k =£4 fTffiE 192© EMF- ' ..... —— “' “But, Mr. Gilmore has two push-buttons on his desk. There is a buzzer for the stenographers and a buzzer in the outer office too. The two circuits, then, look like this:” CL E Rsr Fc srr-jBtfrroAf J30ZZEX N oaree Office un SECOND PVSH-eUTTON jBVZZER 1 STENOqEARNERS Room “Now, the first thing I did was to find out if the push-buttons were all right and the way I did that was to take a small wire and “cut-out” the push- buttons by connecting the wire to each side .of the push-buttons to furnish a path for the electricity to go around the push-buttons like this:” □ cur oar mres mi n “Then if the push-buttons are out of order, the buzzers will ring. Well, the buzzers didn’t ring, so I tested out the dry cells of the battery separately, leaving the push-buttons “shorted,” and I found the buzzers rang with two of the cells; one was “dead.” So I connected the two “live” cells together again (in scries) as I did at home and the buzzers rang. I then: removed the “jumper” across the push-buttons and asked Mr. Gilmore to try the buzzers. Well, Jimmie, you should have seen the look Mr. Gilmore gave me when they worked. He didn’t think 1 could lix the buzzers, but 1 showed him.” Page Three Hundred Thirty-four

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 THE 1920 EMF: 7- W T Pick out the folks you like the least and watch them for a while — They never waste a kindly word; they never waste a smile. They criticise their fellow men at every chance they get; They never found a human just to suit their fancy yet. From them I guess you’d learn some things if they were pointed out— Some things that every one of us. should know a lot about. When someone “knocks” a fellow, pass ’round the loving cup— Say something good about him, if you have to make it up! A LITTLE MATHEMATICS (By Kelly?) He was teaching her arithmetic. He said it was his mission. He kissed her once and kissed her twice. And said: “Now that’s addition.” And as he added smack by smack In silent satisfaction. She timidly gave him one back And said: “Now that is subtraction.” Then lie kissed her and she kissed him. Without an explanation And they both together said: “Now that is multiplication.” But dad appeared upon the scene. And stormed to see the vision. And kicked poor “him” three blocks away. And said: “That is long division.” IT. A. LIEDTKE. If you don’t feel just right. If you don’t sleep at night; If you moan and sigh; If your throat is dry; If you can’t smoke or chew; If your grub tastes like glue; If your heart doesn’t beat; If you’ve got cold feet; If your head’s in a whirl; For heaven’s sake—marry the girl. C. O. UNDEMAN. Page Three Hundred Thirty.six