This week I learned about four helpful inventions which are the Electric Clock, Blueprints, the Stapler, and Grain Elevators.
The Electric Clock is a clock that uses electricity or a battery as power instead of a pendulum. This was very useful because clocks could now be small and compact since it did not need a pendulum to give it power. Also the clocks could be more accurate because if different clock makers made their pendulum size just a little bit different, then the clocks would be off.
Blueprints are used for designing projects like houses or cars. The designs are drawn on clear paper. Then on regular paper a chemical which is a mix of Ammonium Iron Citrate and Potassium Ferricyanide is brushed on it. The clear paper is placed on the paper with the chemical on it then exposed to ultraviolet light causing the paper to turn blue except where the pencil marks were. This was really useful because a lot of copies could be made cheap instead of one hiring someone to hand copy the design.
The Stapler is very useful. It works by pressing metal bars into things like paper to hold it in place. The Stapler is used on books and to hold paperwork in place.
Grain Elevators are used to carry grain up into silos to be sorted and stored. If someone bought the grain then the Grain Elevator could carry the grain down and dump it into a truck.
So my favorite invention this week is the Blueprints. I think that the Blueprints are cool because of how fast one can make copies of designs.