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Excerpt from the New York World
Telegram, July 11, 1935 -
Nikola Tesla revealed that an earthquake which drew police and ambulances to the region of his laboratory at 48 E. Houston St., New York, in 1898, was the result of a little machine he was experimenting with at the time which "you could put in your overcoat pocket."
The bewildered newspapermen pounced upon this as at least one thing they could understand and "the father of modern electricity" told what had happened as follows:
"I was experimenting with vibrations. I had one of my machines going and I wanted to see if I could get it in tune with the vibration of the building. I put it up notch after notch. There was a peculiar cracking sound.
"I asked my assistants where did the sound come from. They did not know. I put the machine up a few more notches. There was a louder cracking sound. I knew I was approaching the vibration of the steel building. I pushed the machine a little higher. "Suddenly all the heavy machinery in the place was flying around. I grabbed a hammer and broke the machine. The building would have been about our ears in another few minutes. Outside in the street there was pandemonium.
"The police and ambulances arrived. I told my assistants to say nothing. We told the police it must have been an earthquake. That's all they ever knew about it."
Some shrewd reporter asked Dr. Tesla at this point what he would need to destroy the Empire State Building and the doctor replied: "Vibration will do anything. It would only be necessary to step up the vibrations of the machine to fit the natural vibration of the building and the building would come crashing down. That's why soldiers break step crossing a bridge."
He put his little vibrator in his coat-pocket and went out to hunt a half-erected steel building. Down in the Wall Street district, he found one&endash;ten stories of steel framework without a brick or a stone laid around it. He clamped the vibrator to one of the beams, and fussed with the adjustment until he got it.
Tesla said finally the structure began to creak and weave and the steel-workers came to the ground panic-stricken, believing that there had been an earthquake. Police were called out. Tesla put the vibrator in his pocket and went away. Ten minutes more and he could have laid the building in the street. And, with the same vibrator he could have dropped the Brooklyn Bridge into the East River in less than an hour.
The other day I was flipping through the channels (hate to admit it), but came across mention of my man, Nikola Tesla. Of course, I was intrigued. It was on Discovery Channel's program, "Mythbusters". In this episode they set out to build and test Tesla's patented and legendary "earthquake machine", which weighed only six pounds. Tesla claimed he built one and attached it to a steel beam in his large building. He then tuned the machine, searching for a frequency of oscillation that would resonate with the steel structure. After a while he found the right frequency and the entire building started to quake violently. He had to take a hammer to the machine to get it to stop. Residents of the building evacuated and the police and fire department reported to the scene. The hosts of the show, who set out each week to, more or less, scientifically disprove common "myths" and legends, didn't follow the patent exactly and made two machines that didn't work. Then another guy built it and they finally had something that was producing results. A six pound, hand-held machine that was causing a massive steel beam to oscillate violently. They found a large steel bridge to test it on (I'm not sure which bridge it was, but it was massive). After tuning the machine extensively, they finally found a frequency that resonated with the structure and everything on the bridge was vibrating. A six pound machine was producing a rythmic vibration over a hundred feet from its location. They said it felt like a semi-truck was going by...constantly. Nevertheless, they "disproved the myth", because it didn't exactly cause an earthquake. Maybe not, but something else could.
He put his little vibrator in his coat-pocket and went out to hunt a half-erected steel building.
Originally posted by CaptainObvious
Where are you going with this? Are you attempting to find another reason why the towers collapsed?
Originally posted by gottago
I've mentioned Tesla's pocket "quake" machine in a few posts and thought of opening a thread on it, so glad to see you got farther than I did with it.
Originally posted by Maya432
but for the twin towers?
I have to vote "NO"
this resonant wave function will not instantly pulverize,
it will slowly increase in vibration until it vibrates itself apart.
Originally posted by Maya432
I saw that Mythbusters episode
they were not trying to cause an earthquake.
they were seeing if the small oscillating device
could be matched to the resonant frequency of the large object
(a bridge) , and to see if the matching frequency would cause
the bridge to start to oscillate as well.
After an hour of testing, though, they weren't able to get anything stronger than the vibrations they initially felt. No earthquake.
FIRE INDUCED VIBRATION MONITORING FOR BUILDING COLLAPSE. FINAL REPORT
Fire-induced core column shortening detected. Due to heating from fires following the aircraft impacts and subsequent buckling, there was a shortening of core columns seen in both towers on floors at or near the fire-affected impact sites. Shortening of the core columns caused the floor system to pull the perimeter columns inward—the observed inward bowing that was seen minutes prior to the collapse of each tower. Significant thermal sagging of the floor system exacerbated the inward pull on the perimeter columns in WTC 2. Vertical loads carried by shortened columns were redistributed to perimeter columns, putting additional strain on their load-bearing capabilities.