Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Latest By
Category:
Armor
Artificial
Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual
Person
Warfare
Weapon
Work
"Human beings hardly ever learn from the experience of others. They learn; when they do, which isn't often, on their own, the hard way."
- Robert Heinlein
 |
| 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..." |
| Technovelgy 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."
Comment/Join this discussion ( 0 ) | RSS/XML | Blog This |
Additional
resources:
More Ideas
and Technology from The Man Who Sold The Moon
More Ideas
and Technology by Robert Heinlein
Tech news articles related to The Man Who Sold The Moon
Tech news articles related to works by Robert Heinlein
| 3D Printing A 12-Meter Boat Hull |
| China Still Working On Rescue Robot That Eats People |
| Can One Robot Do Many Tasks? |
| Roborock Saros Z70 Is A Robot Vacuum With An Arm |
Want to Contribute an
Item?
It's easy:
Get the name of the item, a
quote, the book's name and the author's name, and Add
it here.
| <Previous | Next> |
|
|
|
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 Science Fiction Invention Timeline, or see what's New.
|
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
'...each of them is a neural mapping of the mind of a Tibetan monk who actually lived.'
'...there's a narrow belt where the climate is moderate.'
'The leg was to function, in a way, as a servo-mechanism operated by Larry’s brain, through the mediation of the electronic brain in the leg.'
'... every veephone on the continent would display, over and over, two propositions.'
'Completely silent, accurate up to about twenty meters. No recoil...'
'He wore spectacles with thick wavy lenses. The spectacles were intended to make him not only half blind, but to give him whanging headaches besides.'
