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Updated: June 7, 2025
This is made exactly like the one described in connection with the experimental transmitter. The Motor-Generator Set. Where you have only a 110 or a 220 volt direct current available as a source of power you need a motor-generator to change it to 350 volts, and this is an expensive piece of apparatus.
From the current distributor the current was conducted through other oil switches to the transformers entering at 100,000 volts and emerging at 2,300 volts. Then the current was conducted from the transformers through switches to the motor-generator sets and became the power employed to operate them.
If you ever caught an able-bodied, two-year-old mutton by the hind legs and felt the 750 volts of kicking that he can send through your arm seventeen times before you can hurl him into the vat, you will, of course, hope that he may die instead of dry.
The heaping up of the potential only took place when transformers were used, and not when the dynamos were connected direct. In the former case the increase of volts was proportional to the length of main used, and 8,500 at Deptford gave 10,000 at London. Mr.
This tube is made like the amplifier tube described for use with the preceding experimental transmitter, but it is larger, has a more perfect vacuum, and will stand a plate potential of 350 volts while the plate current is .045 ampere. The filament takes a current of a little more than 2 amperes at 7.5 volts. A standard 4-tap base is used with it.
Some dielectrics 0.2 mm. thick can be made to stand up to 8,000 volts when in small pieces, but in complete condensers a much greater margin must be allowed. Another difficulty arises from absorption, and whenever this occurs, the apparent capacity is greater than the calculated.
"You are in time," she said gently, encouragingly, and she tightened the grasp of her hands. As the volts of an electric shock quivering through a body are suddenly withdrawn, and the rigidity becomes a ghastly inertness, so Jasmine's hands, and all her body, seemed released.
There are two sides to the system, the positive side being represented by the conductors P and PN, and the negative side by the conductors PN and N. Each side, if considered separately, has a potential of about 110 volts, yet the potential of the two outside conductors, P and N, is 220 volts. The lamps are 110 volts.
One particular unit delivered 422 amperes at 12,000 volts. The beauty of this system was that the voltage could be stepped down using transformers for local use, or stepped up to many thousands of volts for transmission over long distances through relatively thin conductors. Edison's generating stations were incapable of any such thing.
To drive the shafting only while the elevator is coming down or idle would require about 150 volts or 1½ H. P., and if this was in constant operation the balance of the day, 9 hours, its total use on shafting would be 13½ H. P. hours, which, added to the 5 H. P. hours, gives us a grand total of 18½ H. P. hours, or 37 per cent. of the contract hours.
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