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Updated: May 27, 2025
This device is quite like the variocoupler, but with these differences: the rotor turns in the stator, which is also the section of a ball, and one end of the primary is connected with one end of the secondary coil. To be really efficient a variometer must have a small resistance and a large inductance as well as a small dielectric loss.
They found their own centers of gravity and spun around them!" The Chief scowled, deep in thought. Then his face went blank. "By the holy mud turtle!" he grunted. "I get it!" Joe said, with very great pains not to seem triumphant, "Instead of spinning the shaft and trimming the rotor, we'll spin the rotor and trim the shaft.
Scotty hurried to look, while Rick went to the glove compartment. The flashlight hadn't been touched. He got it and joined Scotty, throwing the beam under the hood. For a moment everything looked normal, then Rick saw that the distributor cap and rotor were missing. The question was, had the men simply hidden them? Or had they taken the parts along? Scotty put his thoughts into words.
The other connections are exactly the same as shown in Figs. 44 and 45. An Intermediate Wave Set With Variocoupler Inductance Coils. By using the coil wound on the rotor of the variocoupler as the tickler the coupling between the detector tube circuits and the aerial wire system increases as the set is tuned for greater wave lengths.
Now connect one end of the secondary coil, or rotor, of the variocoupler with one post of the .0005 mfd. variable condenser and the other part to the grid of the detector tube. Connect the other end of the rotor of the variocoupler to one of the posts of the first variometer and the other post of this to one of the terminals of the detector filament.
The two smaller balance pistons, L and M, are allowed to remain on the high-pressure end; but the largest piston, Z, is placed upon the low-pressure end of the rotor immediately behind the last ring of blades, and working inside of the supplementary cylinder W. Being backed up by the body of the spindle, there is ample stiffness to prevent warping.
On no account should a test be proceeded with when any doubt exists as to the clearance dimensions. The dummy rings of a turbine, namely, those rings which prevent excessive leakage past the balancing pistons at the high-pressure end, should have especial attention before a test. In this A is the cylinder or casing, B the spindle or rotor, and C the blades.
Chow's tasty meals helped break the monotony. It was the following day when they reached the missile search area. Tom surfaced the Sea Hound and reversed blade pitch, then gunned the rotor turbines for an aerial reconnaissance flight, while the jetmarine and the other seacopter stood by in the water. "Brand my guppies, it's some ocean, eh, boss?" Chow remarked in an awed voice.
He picked up a twig and began to scratch a drawing on the soil in front of him. He drew four coils arranged symmetrically round the circumference of a circle. In the centre he drew a rotor or armature. As each coil in turn was energised it attracted the rotor towards it and the rotary motion was established. When he constructed the first practical models he used eight, sixteen and even more coils.
To secure the first two of these factors the wire should be formed of a number of fine, pure copper wires each of which is insulated and the whole strand then covered with silk. This kind of wire is the best that has yet been devised for the purpose and is sold under the trade name of litzendraht. A new type of variometer has what is known as a basket weave, or wavy wound stator and rotor.
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