Writing Like It’s 1895
My heroine needs a flashlight. And she needs one bad. It’s 1895 and they don’t exist. After 1900 I could get away with it.
Why didn’t they exist. Not because of batteries. Usable batteries had been developed by 1802 and telegraphs had been using batteries since the 1830s. But dry cells, cheap enough for flashlights would not come along until 1910.
Edison had carbon filaments light bulbs by 1880. But they were delicate and not good for banging around in flashlights. They also needed 90 or so volts and that would take a lot of batteries. Edison thought that tungsten would make a good filament, but the equipment to make fine tungsten wire would not be developed until 1906.
Also there was the problem of vacuum equipment. In 1895 it wasn’t good enough. Any oxygen in the light bulb would react with the filament and shorten its life. That equipment would not be available until after 1900.
People were not setting around. Paid and unpaid inventors, scientist and engineers were working on the light bulb, not just Edison and his lab. There was not just one thing for a mad genius to overcome to make a flashlight in 1895.
How about a carbide miner’s lamp? Carbide is made with electricity. Lots of electricity. The power plant at Niagara Falls would have to be finished before carbide became readily available. That wasn’t until after 1900.
So my heroine can’t just cobble a flashlight up out of things lying around the airship. Also there would be patents fights if she did come up with a flashlight. Just because a idea documented on a patent would never work, that has never stopped an inventor and his lawyers from suing, suing, suing.
There were platinum filament light bulbs. They worked, but they were very expensive. Not practicable, but whoever said the heroine had to be practicable?
Stay strong, write on, and have you checked the batteries in your flashlight lately. Replace them once a year.
Professor Hyram Voltage