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Updated: May 20, 2025
In fact in its normal position, the vibrator is distant from its contact, and the closing of the circuit would produce no action. The motion of F produces a mechanical motion of the spring of the vibrator, which latter acts for a few instants and produces a certain number of contacts that give rise to an equal number of sparks.
The result is that the low voltage direct current of the battery is changed into alternating currents whose frequency is precisely that of the spring vibrator, but while the frequency of the currents is low their potential, or voltage, is enormously increased. What Ratio of Transformation Means.
The vibrator consists of a stiff, flat spring fixed at one end to the box or base while it carries a piece of soft iron called an armature on its free end and this sets close to one end of the soft iron core. Insulated from this spring is a standard that carries an adjusting screw on the small end of which is a platinum point and this makes contact with a small platinum disk fixed to the spring.
Unlike the spark coil, however, which has an open magnetic core and whose secondary coil is wound on the primary coil, the transformer has a closed magnetic core, with the primary coil wound on one of the legs of the core and the secondary wound on the other leg. It has neither a vibrator nor a condenser.
"I suspect that's the only reason he got a helper, anyway, so he could go fishing more often. There isn't really enough work in town for more than one barber." "Did you look at the massage machine?" Rick asked anxiously. The editor nodded. "It's nothing but a hood, with three ordinary massage gadgets inside. Vibrator heads, I think they're called."
You will also want as much wire as you can afford, to connect the instruments, and two short pieces of wire to connect your telephones with the ground. They need not cost much. A small cigar-box will answer for the case. In one end of the box cut a round hole, say, three inches across. Against this hole fasten a disk of thin sheet-iron for the vibrator or "diaphragm."
B and C are twenty-six inches apart, C and D forty-eight inches and D and E twenty-six inches. B is connected to the vibrator and E to point in dark box, the other point to ground. We received sparks at intervals, although insulated by such space." With the above our extracts must close, although we have given but a few of the interesting experiments tried at the time.
A large and long bone was selected, as the femur of a man or deer, and it was channeled by deep longitudinal incisions. The projections left between the fissures were rasped with another bone or a shell, and thus a harsh but varied sound could be produced. The tetzilacatl, the "vibrator" or "resounder," was a sheet of copper suspended by a cord, which was struck with sticks or with the hand.
I immediately climbed the pole and cut the Frankfort side of the line. Then I took another piece of cable, and connected the earth terminal of the vibrator with the telegraph pole. The British signals now came through beautifully clear.
When the end of the wire was rubbed on the stove it gave out splendid sparks. When permanently connected to the stove, sparks could be drawn from the stove by a piece of wire held in the hand. The point X of vibrator was now connected to the gas-pipe and still the sparks could be drawn from the stove."
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