"Hello friends i'm Abhishek Jha welcome to my blog <science, computer and gaming zone>. Today we are going to know some cool and unknown facts about Screwdriver, that is interesting!"
A screwdriver is a tool, manual or powered, for screwing (installing) and unscrewing (removing) screws. A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle.
1)) The first screws are seen on suits of armor that date back to the 1500's. And the first instance of a screwdriver depicted on paper was in a manual for a military workshop from the Sixteenth Century. But it is assumed that the screwdriver is actually older than the 1500's because the drawing of the screwdriver in the manual was so refined.
- 10 interesting facts:-
1)) The first screws are seen on suits of armor that date back to the 1500's. And the first instance of a screwdriver depicted on paper was in a manual for a military workshop from the Sixteenth Century. But it is assumed that the screwdriver is actually older than the 1500's because the drawing of the screwdriver in the manual was so refined.
2)) In America the first handheld screwdriver appeared on the market in the 1800's.
3)) The flat head or slotted screwdriver was the first known head for a screwdriver.
4)) The screw actually predates the screwdriver. The first screws were probably tightened with a knife.
5)) The screwdriver uses applied torque to tighten down screws and bolts.
6)) A traveling salesman invented the Phillips or cruciform head screwdriver that we are so familiar with today in the early 1900's.
7)) General Motors used the cruciform head screw in 1936 on the Cadillac.
8)) The screwdriver is made up of a head or tip, which is fitted to the screw or bolt. A cylindrical shaft connects the handle and the head and can be any length depending on the design and purpose of the screwdriver. The handle at the other end of the head, usually cylindrical, is mounted around the shaft of the screwdriver. The handle is usually plastic or other molded material and textured or grooved for easy gripping.
9)) There are specialized types of screwdrivers for special jobs. For instance, there are very small screwdrivers that are used for working on computers and PC boards. They are very small and have a special shaft for applying the proper small amounts of torque. Then there are very big and long screwdrivers for working on engines with a larger and thicker shaft so more torque can be applied without damaging the screwdriver.
10)) There are several screwdriver types, including: flat- head, cabinet, Phillips, Frearson, Torx, clutch-head, hex, Bristol multi-spline and square-tipped.
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