In 1914, Russian physicist Boris Weinberg proposed an electromagnetic vacuum train that could move an individual passenger from New York to San Francisco in half a day. Reasoning that air resistance and friction are the greatest enemies to speed, Weinberg envisioned using electromagnets to suspend a car in a tube from which the air had been partially exhausted. An individual passenger would lie prone in a 300-pound iron cylinder drawn along by a series of solenoids. New passengers could be introduced into the system through an airlock at a rate as high as 12 per minute, “the whole proceeding being not unlike that of feeding cartridges from a belt or clip to a machine gun.”

Weinberg estimated a maximum speed of 500 mph. “Think what that means!” he wrote in The Popular Science Monthly. “New York would be no more distant from Chicago than it is now from Philadelphia, so far as relative times are concerned. Florida might easily become a kind of winter Coney Island for all New York.”

He built a model of the system at the Technological Institute of Tomsk, but the project never got off the ground (so to speak). One reason may have been the cost: In order to slow the cars gradually, each station would have to be 2 miles long.

In 2004 Thomas Magdi patented a machine for changing light bulbs:

A light bulb changer method and apparatus that contains components that allows for instantly detecting a burned out light, automatically removing the burned out light, and automatically replacing the burned out light with a replacement bulb. The changer operates without human intervention, and can be assembled from a kit having a light fixture, detecting sensor, removing and replacement hardware.

The 23-page patent abstract contains 24 figures diagramming 97 components.

Why is this funny?

“This invention relates to new and useful improvements in an aeroplane of rooster shape.” Well, all right, then. Angel Mateo’s 1930 patent application is remarkably thorough — the wings even flap — but nowhere does the inventor explain why he thinks the world needs such a thing. “The propeller is depended upon to accomplish most of the flying of the device and the wings to assist in the flying and also to simulate a flying rooster.” Perhaps, like a poem, it provides its own reason.

In 1994, computer scientists Graeme Ritchie and Kim Binsted designed a computer program to generate original riddles:

• What do you call a ferocious nude? A grizzly bare.
• What do you get when you cross breakfast food with a murderer? A cereal killer.
• What’s the difference between leaves and a car? One you brush and rake, the other you rush and brake.
• What’s the difference between a pretty glove and a silent cat? One is a cute mitten and the other is a mute kitten.

They called it JAPE, for Joke Analysis and Production Engine. In 1997 they convened a group of 8- to 11-year-old children to act as judges and presented them with a random selection of JAPE-produced riddles, human-produced riddles, nonsense nonjokes, and sensible nonjokes. Then they asked them to decide whether each text was a joke and, if so, how funny it was and whether they had heard it before.

“The results showed that the JAPE-produced riddles were identified as jokes just as reliably as the human-produced ones, and both were easily distinguished from the non-jokes,” writes Rod Martin in The Psychology of Humor (2007). “Although the JAPE-produced jokes were rated as less funny, on average, than the human-produced jokes, a number of the JAPE riddles were rated as being just as funny as those produced by humans.”

(Binsted, K., Pain, H., & Ritchie, G., “Children’s Evaluation of Computer-Generated Punning Riddles,” Pragmatics and Cognition, 5(2) [1997], 309-358.)

Writing fables is harder.

If a “dog year” is equivalent to seven human years, then time passes seven times more quickly for dogs than for humans. So in 1990 Rodney Metts invented a novelty watch that reflects this by advancing at seven times normal speed. This is a reminder as much to you as to your pet:

If a dog is kept locked in the basement of a house during an eight or nine hour day, for example, while its owner is away, the elapsed time on the dog watch will be 56 to 63 hours, or approximately two and one-half days. A one-hour ride in an automobile will register seven hours on a dog watch. Thus the value in dog time of a human activity will become quickly apparent.

That’s the actual patent figure. Part 10 is “dog.”

For the conservation-minded, in 1988 Joseph Beck patented a “sail attachment” for a bicycle. The mast extends upward from the rear wheel, and it’s mounted on a pivot so that it will swing out of the way if you run into something. I’m not sure how you’d store it, though.

Related: In 1826 George Pocock invented a buggy drawn by kites.

Patented in 1993, Raymond Norris’ “combined camouflage and decoy device” is pretty straightforward: You wear a cap that supports an artificial head (to attract birds) and a cape (to hide you from them).

Just hope it doesn’t attract giant geese.

Patented in 1914, Socrates Scholfield’s “illustrative educational device” uses two spiral springs to demonstrate the existence of God. Or to demonstrate the tension between good and evil. Or to demonstrate the consciousness of an animal organism. Actually I’m not sure what it demonstrates, and I’ve read the five-page abstract twice.

This schematic device … provides an educational emblem of the conscious relation that must exist between the co-extensive dispensing mediums for beneficence and maleficence, in the terrestrial factory; and it clearly indicates that the attribute of maleficence, which is ascribed to the realm of the adverse medium, may, under certain changed conditions, be made subject to decrease, and to a change in its relative action; while the attribute of beneficence, which pertains to the realm of the controlling supreme governor, is unconditioned, unchangeable and everlasting.

Here’s the whole thing if you want to try it out. Be careful, I guess.