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"Concepts of religion may now be goals of science and engineering."
- Bart Kosko
 |
| Automatic Light Switch | ||
| A device that senses if an illuminated room is empty, and turns off the light. |
Waste not, want not - a saying made for the lunar environment.
| As they left their joint office, Strong, always penny conscious, was careful to switch off the light. Harriman had seen him do so a thousand times; this time he commented. "George, how about a light switch that turns off automatically when you leave a room?"
"Hmm- but suppose someone were left in the room?" "Well... hitch it to stay on only when someone was in the room- key the switch to the human body's heat radiation, maybe." "Too expensive and too complicated." "Needn't be. I'll turn it over to Ferguson to fiddle with. It should be no larger than the present light switch and cheap enough so the power saved in a year will pay for it..." |
| From The Man Who Sold The Moon,
by Robert Heinlein. Published by Shasta in 1950 Additional resources -
|
This kind of switch exists today, of course; they are cheap enough to pay for themselves in a year or so of use.
I don't know if this idea is original to Heinlein or not; commercial light switches for use in homes have been around since the 1890's, if not a bit earlier.
Heinlein continues his justification for such a device, proceeding along in a vein that seems to have some validity today.
"You can if the power continues to be rationed. There is a power shortage now; and there will be a bigger one."
Thanks to an anonymous reader, new to Technovelgy.com, who left this tip on the contact page.
Strong objected. "It's no good commercially. Switching of a light when you leave a room is a matter of temperament... If a man hasn't got it, you can't interest him in such a switch."
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Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
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'Household Automata received an urgent task to develop production units of бытовые тканевые разглаживатели - a household fabric smoother.'
'...what's to keep me from showing face, Man? I'm showing a voice this instant... I can show a face the same way.'
'It was cheaper to pay the refugees to go without up-to-the-minute equipment.'
'...a 2045 convertible with a Hennis-Carleton positronic motor and an Armat chassis.'
'You can hook a Thorsen tube into a control circuit... and the tube will "remember" what was done and can direct the operation...'
Nature is a master of fabricating structured materials consisting of living and non-living components.
'The tiny devices chirped their impulse codes at one another...'
Then some unknown race had chanced upon the dreamers and decided to "help them out."
