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Author Topic: Questions I would like to ask Mr. Tesla  (Read 4462 times)

barbosi

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Questions I would like to ask Mr. Tesla
« on: July 05, 2008, 06:15:04 AM »
Please feel free to ask here you own questions and hope for a good inspiration coming from an answer. I know there might be many questions anyone may ask, especially "can I have the blue prints?".

I am only eagerly curious about one thing (as for a start):
- How did you know what frequencies you were dealing with when you were using the disruptive discharge through the spark gap? Or better yet, if you controlled also the pulse  duration within a cycle, how did you know the pulse width? Kind of two questions here... but I forgive myself for abusing the genius...

alan

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Re: Questions I would like to ask Mr. Tesla
« Reply #1 on: July 05, 2008, 01:44:00 PM »
I think he knew it by the rotational speed of his alternators.

barbosi

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Re: Questions I would like to ask Mr. Tesla
« Reply #2 on: July 05, 2008, 08:54:10 PM »
Alternators and not only were used to charge the capacitor.
My question was related to the discharge. With this disruptive discharge in copper bus bars he generated high frequency currents. How did he know about "millions of cycles per second"? How he determined that? Using a Herz-meter?  ::)

gyulasun

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Re: Questions I would like to ask Mr. Tesla
« Reply #3 on: July 05, 2008, 11:16:12 PM »
Alternators and not only were used to charge the capacitor.
My question was related to the discharge. With this disruptive discharge in copper bus bars he generated high frequency currents. How did he know about "millions of cycles per second"? How he determined that? Using a Herz-meter?  ::)


Hi,

Tesla built every kind of measuring equipment he had needed...

U.S. Patent 1,209,359  - Speed-Indicator  - 1916 December 19 - Improvement that uses the adhesion and viscosity of a gaseous medium [preferably air] to measure speed [or measure the torque-transmission] between indicator and driver; Durable; Simple; Inexpensive; Reliable.
U.S. Patent 1,274,816  - Speed Indicator  - 1918 August 6 - Speedometer that possesses the feature of: Linearly proportional torque readings; Strong low speed torsional effects; not affected by atmospheric density, temperature, nor magnetic influences; Rugged; Simple; Economical.
U.S. Patent 1,314,718  - Ship's Log  - 1919 September 2 - Novel and advantageous construction of a ship's log; Instantaneous reading of knots or miles-per-hour.
U.S. Patent 1,329,559  - Valvular Conduit - 1920 February 3 - Improvement by means of a conduit or channel characterized by valvular action; Conduit has baffles, recesses, projections, enlargements, or buckets that channels the flow's movement one way more efficiently; Mechanical diode; One-way valve with no moving parts.
U.S. Patent 1,365,547  - Flow-Meter  - 1921 January 11 - Related to the meter of measurement for velocity and quantity of fluid flow.
U.S. Patent 1,402,025  - Frequency-Meter - 1922 January 3 - Ascertain the periodic electric frequency and electric oscillation by the rotation or reciprocation of an electromechanical device.

To see these, copy and paste the patent number into this link: http://www.pat2pdf.org/

rgds,  Gyula

barbosi

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Re: Questions I would like to ask Mr. Tesla
« Reply #4 on: July 06, 2008, 05:01:24 AM »
Thanks for the effort to put together the list. It was a prolific start of 20-th century but Tesla presented before the Institution of Electrical Engineers, London, February 1892 the "EXPERIMENTS WITH ALTERNATE CURRENTS OF HIGH POTENTIAL AND HIGH FREQUENCY" and stated:

Quote
In the experiments such as performed this evening, we operate the coil either from a specially constructed alternator capable of giving many thousands of reversals of current per second, or, by disruptively discharging a condenser through the primary, we set up a vibration in the secondary circuit of a frequency of many hundred thousand or millions per second, if we so desire; and in using either of these means we enter a field as yet unexplored.

So he must knew before 1892 about those vibration rates, how to create them and how many cycles per second were.

He may have reached that conclusion after calculations? How can we calculate nowadays a frequency resulted from a disruptive discharge from a capacitor into a copper bar?
« Last Edit: July 06, 2008, 05:25:16 AM by barbosi »

gyulasun

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Re: Questions I would like to ask Mr. Tesla
« Reply #5 on: July 06, 2008, 01:11:15 PM »

So he must knew before 1892 about those vibration rates, how to create them and how many cycles per second were.

He may have reached that conclusion after calculations? How can we calculate nowadays a frequency resulted from a disruptive discharge from a capacitor into a copper bar?


I agree he must have known how to measure frequency etc well before 1892 or so.  The patents I referred to seem refinements and his new developments to earlier existing methods.

Well in the 1890 years, electric motors with known RPM already existed and Tesla used such motors to operate his circuit controllers.  And yes I think he calculated the number of interruptions made by his various controllers with different number of contacts (buried the contacts later in mercury). He has several patents specifically on circuit controllers.  So he must have calculated how many interrupts his controller made in a circuit so the number of discharges from a cap must have been known by him with sufficient precision.

rgds,  Gyula